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sboydlns.univacemulators/U1005/U1005CPU.pas
sboydlns 7e18a9ca40 Initial project import
2020-12-25 12:15:49 -05:00

2496 lines
76 KiB
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unit U1005CPU;
interface
uses SysUtils, U1005Types, U1005Memory, U1005Reader, U1005Printer, U1005Punch;
type
T1005IOFlipFlop = ( ffRead, ffPunchRead, ffPrint, ffStackerSelect );
T1005IOFlipFlops = set of T1005IOFlipFlop;
T1005CPU = class(TObject)
private
function GetSingleStep: Boolean;
procedure SetSingleStep(const Value: Boolean);
protected
FMemory: T1005Memory;
FReader: T1005Reader;
FPrinter: T1005Printer;
FPunch: T1005Punch;
FState: T1005CPUState;
FOnDebug: TDebugEvent;
FOnExecuteInstruction : TExecuteInstructionEvent;
FOnError: TErrorEvent;
FOnFetchInstruction: TFetchInstructionEvent;
FOpcodes: T1005OpcodeList;
FCrntOpcode: T1005Opcode;
FConditionCodes: Cardinal;
FAlt1: Boolean;
FAlt2: Boolean;
FAlt3: Boolean;
FAlt4: Boolean;
procedure SetAlt1(Value: Boolean); virtual;
procedure SetAlt2(Value: Boolean); virtual;
public
constructor Create(mem: T1005Memory;
rdr: T1005Reader;
prt: T1005Printer;
pch: T1005Punch); virtual;
procedure Clear; virtual; abstract;
procedure Start; virtual; abstract;
procedure Stop; virtual; abstract;
property Alt1: Boolean read FAlt1 write SetAlt1;
property Alt2: Boolean read FAlt2 write SetAlt2;
property Alt3: Boolean read FAlt3 write FAlt3;
property Alt4: Boolean read FAlt4 write FAlt4;
property ConditionCodes: Cardinal read FConditionCodes;
property OnError: TErrorEvent read FOnError write FOnError;
property OnExecuteInstruction: TExecuteInstructionEvent read FOnExecuteInstruction write FOnExecuteInstruction;
property OnFetchInstruction: TFetchInstructionEvent read FOnFetchInstruction write FOnFetchInstruction;
property SingleStep: Boolean read GetSingleStep write SetSingleStep;
property State: T1005CPUState read FState;
end;
T1005FedSysCPU = class(T1005CPU)
private
FCrntOperand: T1005FedSysOperand;
procedure AM1;
procedure AM2;
procedure AR1;
procedure AR2;
procedure CA1;
procedure CA2;
procedure CLR;
procedure CN1;
procedure CN2;
procedure DIVIDE;
procedure ExecuteInstruction;
procedure FetchInstruction;
procedure IC;
procedure J;
procedure J0;
procedure J1;
procedure J2;
procedure JR;
procedure JX;
procedure LA1;
procedure LA2;
procedure LD1;
procedure LD2;
procedure LN1;
procedure LN2;
procedure LPR;
procedure LWS;
procedure MemClear(const dest: I1005Addr; len: Integer);
procedure MemCpy(const dest, src: I1005Addr; len: Integer);
procedure MUL;
procedure PrintSpace(count: Integer);
procedure Punch(stacker: Cardinal; image: Cardinal);
procedure PunchPaperTape(count: Integer);
procedure Read(image: Cardinal);
procedure ReadAux(stacker: Cardinal);
procedure ReadPaperTape(count: Integer);
procedure ReadPunch(stacker: Cardinal; image: Cardinal);
procedure SA1;
procedure SA2;
procedure SD1;
procedure SD2;
procedure SED;
procedure SHIFTL;
procedure SHIFTR;
procedure Skip(chan: Cardinal);
procedure SPR;
procedure SM1;
procedure SM2;
procedure SR1;
procedure SR2;
procedure SZS;
procedure XFC;
public
constructor Create(mem: T1005Memory;
rdr: T1005Reader;
prt: T1005Printer;
pch: T1005Punch); override;
destructor Destroy; override;
procedure Clear; override;
procedure Start; override;
procedure Stop; override;
end;
T1005CommCPU = class(T1005CPU)
private
FIOFlipFlops: T1005IOFlipFlops;
procedure ExecuteInstruction;
procedure FetchInstruction;
procedure AD;
procedure AK;
procedure AM;
procedure BT;
procedure CA;
procedure CC;
procedure CK;
procedure CM;
procedure CN;
procedure DV;
procedure ED;
procedure EL;
procedure GC;
procedure J;
procedure JC;
procedure JK;
procedure JL;
procedure JR;
procedure JT;
procedure ML;
procedure MU;
procedure SC;
procedure SM;
procedure SU;
procedure TA;
procedure TC;
procedure TD;
procedure TK;
procedure TN;
procedure TR;
procedure TX;
protected
procedure SetAlt1(Value: Boolean); override;
procedure SetAlt2(Value: Boolean); override;
public
constructor Create(mem: T1005Memory;
rdr: T1005Reader;
prt: T1005Printer;
pch: T1005Punch); override;
destructor Destroy; override;
procedure Clear; override;
procedure InitBoot;
procedure Start; override;
procedure Stop; override;
end;
implementation
uses Forms, Math, FmtBcd, Bcd, EmulatorTypes;
{ T1005CPU }
procedure T1005FedSysCPU.AM1;
var
op: T1005FedSysOperand;
len, test: Integer;
op1, op2, rslt, zero: TBcd;
begin
op := FMemory.FetchFedSysOperand;
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
op1 := FMemory.FetchBcd(op.M, len);
op2 := FMemory.FetchAR1Bcd(len);
zero := 0;
rslt := op1 + op2;
test := BcdCompare(rslt, zero);
if (test < 0) then
FMemory.StoreIndicator(IND_NEGATIVE)
else if (test > 0) then
FMemory.StoreIndicator(IND_POSITIVE)
else
FMemory.StoreIndicator(IND_ZERO);
FMemory.StoreBcd(op.M, len, rslt);
end;
procedure T1005FedSysCPU.AM2;
var
op: T1005FedSysOperand;
len, test: Integer;
op1, op2, rslt, zero: TBcd;
begin
op := FMemory.FetchFedSysOperand;
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
op1 := FMemory.FetchBcd(op.M, len);
op2 := FMemory.FetchAR2Bcd(len);
zero := 0;
rslt := op1 + op2;
test := BcdCompare(rslt, zero);
if (test < 0) then
FMemory.StoreIndicator(IND_NEGATIVE)
else if (test > 0) then
FMemory.StoreIndicator(IND_POSITIVE)
else
FMemory.StoreIndicator(IND_ZERO);
FMemory.StoreBcd(op.M, len, rslt);
end;
procedure T1005FedSysCPU.AR1;
var
op: T1005FedSysOperand;
len, test: Integer;
op1, op2, rslt, zero: TBcd;
begin
op := FMemory.FetchFedSysOperand;
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
op1 := FMemory.FetchBcd(op.M, len);
op2 := FMemory.FetchAR1Bcd(len);
zero := 0;
rslt := op1 + op2;
test := BcdCompare(rslt, zero);
if (test < 0) then
FMemory.StoreIndicator(IND_NEGATIVE)
else if (test > 0) then
FMemory.StoreIndicator(IND_POSITIVE)
else
FMemory.StoreIndicator(IND_ZERO);
FMemory.StoreAR1Bcd(rslt);
end;
procedure T1005FedSysCPU.AR2;
var
op: T1005FedSysOperand;
len, test: Integer;
op1, op2, rslt, zero: TBcd;
begin
op := FMemory.FetchFedSysOperand;
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
op1 := FMemory.FetchBcd(op.M, len);
op2 := FMemory.FetchAR2Bcd(len);
zero := 0;
rslt := op1 + op2;
test := BcdCompare(rslt, zero);
if (test < 0) then
FMemory.StoreIndicator(IND_NEGATIVE)
else if (test > 0) then
FMemory.StoreIndicator(IND_POSITIVE)
else
FMemory.StoreIndicator(IND_ZERO);
FMemory.StoreAR2Bcd(rslt);
end;
procedure T1005FedSysCPU.CA1;
var
len: Integer;
i: Integer;
op: T1005FedSysOperand;
begin
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := Min(op.L.SequentialAddr - op.M.SequentialAddr + 1, 10);
i := 10 - len + 1;
while (len > 0) do
begin
if (FMemory.FetchByte(op.M) <> FMemory.FetchAR1(i)) then
begin
FMemory.StoreIndicator(IND_NOT_EQUAL);
Exit;
end;
op.M.Increment;
Dec(len);
Inc(i);
end;
FMemory.StoreIndicator(IND_EQUAL);
end;
procedure T1005FedSysCPU.CA2;
var
len: Integer;
i: Integer;
op: T1005FedSysOperand;
begin
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := Min(op.L.SequentialAddr - op.M.SequentialAddr + 1, 21);
i := 21 - len + 1;
while (len > 0) do
begin
if (FMemory.FetchByte(op.M) <> FMemory.FetchAR2(i)) then
begin
FMemory.StoreIndicator(IND_NOT_EQUAL);
Exit;
end;
op.M.Increment;
Dec(len);
Inc(i);
end;
FMemory.StoreIndicator(IND_EQUAL);
end;
procedure T1005FedSysCPU.Clear;
begin
FState := [ucsHalted];
end;
procedure T1005FedSysCPU.CLR;
var
len: Integer;
op: T1005FedSysOperand;
begin
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
MemClear(op.M, len);
end;
procedure T1005FedSysCPU.CN1;
var
len: Integer;
test: Integer;
op: T1005FedSysOperand;
op1, op2: TBcd;
begin
op := FMemory.FetchFedSysOperand;
len := op.L.SequentialAddr - Op.M.SequentialAddr + 1;
op1 := FMemory.FetchAR1Bcd(len);
op2 := FMemory.FetchBcd(op.M, len);
test := BcdCompare(op1, op2);
if (test < 0) then
FMemory.StoreIndicator(IND_LESS)
else if (test > 0) then
FMemory.StoreIndicator(IND_GREATER)
else
FMemory.StoreIndicator(IND_EQUAL);
end;
procedure T1005FedSysCPU.CN2;
var
len: Integer;
test: Integer;
op: T1005FedSysOperand;
op1, op2: TBcd;
begin
op := FMemory.FetchFedSysOperand;
len := op.L.SequentialAddr - Op.M.SequentialAddr + 1;
op1 := FMemory.FetchAR2Bcd(len);
op2 := FMemory.FetchBcd(op.M, len);
test := BcdCompare(op1, op2);
if (test < 0) then
FMemory.StoreIndicator(IND_LESS)
else if (test > 0) then
FMemory.StoreIndicator(IND_GREATER)
else
FMemory.StoreIndicator(IND_EQUAL);
end;
constructor T1005FedSysCPU.Create(mem: T1005Memory; rdr: T1005Reader; prt: T1005Printer; pch: T1005Punch);
begin
inherited;
FCrntOperand := FedSysOperand;
FOpcodes := T1005OpcodeList.Create;
FOpcodes.AddOpcode(OpCode(X3_SPACE, 'LA1', itClass1, False, LA1));
FOpcodes.AddOpcode(OpCode(X3_APOS, 'LA2', itClass1, False, LA2));
FOpcodes.AddOpcode(OpCode(X3_RIGHT_SQUARE, 'LD1', itClass1, False, LD1));
FOpcodes.AddOpcode(OpCode(X3_ASTERIX, 'LD2', itClass1, False, LD2));
FOpcodes.AddOpcode(OpCode(X3_0, 'LPR', itClass1, False, LPR));
FOpcodes.AddOpcode(OpCode(X3_4, 'SA1', itClass1, False, SA1));
FOpcodes.AddOpcode(OpCode(X3_M, 'SA2', itClass1, False, SA2));
FOpcodes.AddOpcode(OpCode(X3_SEMI, 'SD1', itClass1, False, SD1));
FOpcodes.AddOpcode(OpCode(X3_AT, 'SD2', itClass1, False, SD2));
FOpcodes.AddOpcode(OpCode(X3_I, 'SPR', itClass1, False, SPR));
FOpcodes.AddOpcode(OpCode(X3_F, 'SHR', itShift, False, SHIFTR));
FOpcodes.AddOpcode(OpCode(X3_PERIOD, 'SHL', itShift, False, SHIFTL));
FOpcodes.AddOpcode(OpCode(X3_1, 'CLR', itClass1, False, CLR));
FOpcodes.AddOpcode(OpCode(X3_NOT_EQUAL, 1, 'SC', itCharacter));
FOpcodes.AddOpcode(OpCode(X3_5, 'CA1', itClass1, False, CA1));
FOpcodes.AddOpcode(OpCode(X3_N, 'CA2', itClass1, False, CA2));
FOpcodes.AddOpcode(OpCode(X3_COLON, 'CN1', itClass1, False, CN1));
FOpcodes.AddOpcode(OpCode(X3_PERCENT, 'CN2', itClass1, False, CN2));
FOpcodes.AddOpcode(OpCode(X3_MINUS, 'IC', itClass2, False, IC));
FOpcodes.AddOpcode(OpCode(X3_NOT_EQUAL, 2, 'CCA', itCharacter));
FOpcodes.AddOpcode(OpCode(X3_2, 'J', itClass2, False, J));
FOpcodes.AddOpcode(OpCode(X3_B, 'JG', itClass2, False, J2));
FOpcodes.AddOpcode(OpCode(X3_8, 'JE', itClass2, False, J0));
FOpcodes.AddOpcode(OpCode(X3_7, 'JU', itClass2, False, J1));
FOpcodes.AddOpcode(OpCode(X3_D, 'JR', itClass2, False, JR));
FOpcodes.AddOpcode(OpCode(X3_LEFT_SQUARE, 'JX', itClass2, False, JX));
FOpcodes.AddOpcode(OpCode(X3_V, 1, 'JS3', itClass2));
FOpcodes.AddOpcode(OpCode(X3_V, 2, 'JOF', itClass2));
FOpcodes.AddOpcode(OpCode(X3_LESS, 'AM1', itClass1, False, AM1));
FOpcodes.AddOpcode(OpCode(X3_GREATER, 'AM2', itClass1, False, AM2));
FOpcodes.AddOpcode(OpCode(X3_SHARP, 'AR1', itClass1, False, AR1));
FOpcodes.AddOpcode(OpCode(X3_LOZENGE, 'AR2', itClass1, False, AR2));
FOpcodes.AddOpcode(OpCode(X3_H, 'SM1', itClass1, False, SM1));
FOpcodes.AddOpcode(OpCode(X3_Y, 'SM2', itClass1, False, SM2));
FOpcodes.AddOpcode(OpCode(X3_C, 'SR1', itClass1, False, SR1));
FOpcodes.AddOpcode(OpCode(X3_T, 'SR2', itClass1, False, SR2));
FOpcodes.AddOpcode(OpCode(X3_BACK_SLASH, 'MUL', itClass1, False, MUL));
FOpcodes.AddOpcode(OpCode(X3_G, 'DIV', itClass1, False, DIVIDE));
FOpcodes.AddOpcode(OpCode(X3_A, 'TRL', itClass1, False));
FOpcodes.AddOpcode(OpCode(X3_O, 'SZS', itClass1, False, SZS));
FOpcodes.AddOpcode(OpCode(X3_QUESTION, 'LWS', itClass1, False, LWS));
FOpcodes.AddOpcode(OpCode(X3_3, 'LN1', itClass1, False, LN1));
FOpcodes.AddOpcode(OpCode(X3_L, 'LN2', itClass1, False, LN2));
FOpcodes.AddOpcode(OpCode(X3_R, 'SED', itClass1, False, SED));
FOpcodes.AddOpcode(OpCode(X3_NOT_EQUAL, 3, 'LAN', itCharacter));
FOpcodes.AddOpcode(OpCode(X3_NOT_EQUAL, 4, 'LOR', itCharacter));
FOpcodes.AddOpcode(OpCode(X3_NOT_EQUAL, 5, 'BSH', itCharacter));
FOpcodes.AddOpcode(OpCode(X3_E, 'PTE'));
FOpcodes.AddOpcode(OpCode(X3_AMP, 'XFC', itClass3, False, XFC));
FOpcodes.AddOpcode(OpCode(X3_V, 3, 'JPE', itClass2));
FOpcodes.AddOpcode(OpCode(X3_V, 4, 'JET', itClass1));
FOpcodes.AddOpcode(OpCode(X3_V, 5, 'JI1', itClass1));
FOpcodes.AddOpcode(OpCode(X3_V, 6, 'JAL', itClass1));
end;
destructor T1005FedSysCPU.Destroy;
begin
FreeAndNil(FOpcodes);
inherited;
end;
procedure T1005FedSysCPU.DIVIDE;
var
op: T1005FedSysOperand;
len: Integer;
op1, op2, rslt, quotient, btemp, zero: TBcd;
begin
zero := 0;
op := FMemory.FetchFedSysOperand;
len := Min(7, op.L.SequentialAddr - op.M.SequentialAddr + 1);
op1 := FMemory.FetchBcd(op.M, len);
op1.SignSpecialPlaces := op1.SignSpecialPlaces and $7f; // clear negative flag
op2 := FMemory.FetchAR2Bcd(13);
op2.SignSpecialPlaces := op2.SignSpecialPlaces and $7f; // clear negative flag
if (op2 = 0) then
begin
// space fill result if div by zero
for len := 1 to 10 do
FMemory.StoreAR1(len, X3_SPACE);
for len := 1 to 21 do
FMemory.StoreAR2(len, X3_SPACE);
end else
begin
rslt := op2 / op1;
FMemory.StoreAR1Bcd(rslt); // save to quotient
quotient := FMemory.FetchAR1Bcd(10); // get it back
rslt := rslt - quotient; // isolate fractional part of result
FMemory.StoreAR2Bcd(rslt * 100000000); // save 8 digits of fraction
btemp := FMemory.FetchAR2Bcd(8); // Get it back
btemp := btemp * 1000000000; // shift 9 digits
btemp := btemp + (op2 - (op1 * quotient)); // add in the decimal remainder
FMemory.StoreAR2Bcd(btemp * 10000); // save remainders
end;
end;
procedure T1005FedSysCPU.ExecuteInstruction;
var
op,op2: Byte;
begin
FState := FState - [ucsInstructionFetched];
if (Assigned(FOnExecuteInstruction)) then
FOnExecuteInstruction(Self);
if (Assigned(FOnDebug)) then
FOnDebug(Self, nil);
op := FMemory.FetchFedSysOpcode;
FCrntOperand := FMemory.FetchFedSysOperand;
if (op = X3_V) then
op2 := FCrntOperand.L.Col
else if (op = X3_NOT_EQUAL) then
op2 := FCrntOperand.M.Col
else
op2 := 0;
FCrntOpcode := FOpcodes.FindOpcode(op, op2);
if (Assigned(FCrntOpcode.Proc)) then
FCrntOpcode.Proc;
end;
procedure T1005FedSysCPU.FetchInstruction;
var
pc: I1005Addr;
mrow, mcol, lrow, lcol: Byte;
op: T1005FedSysOperand;
bank, row, col: Byte;
begin
if (ucsInstructionFetched in FState) then
Exit;
pc := FMemory.FetchPAK;
FMemory.StoreOpcode(FMemory.FetchByte(pc));
pc.Increment;
mrow := FMemory.FetchByte(pc);
pc.Increment;
mcol := FMemory.FetchByte(pc);
pc.Increment;
lrow := FMemory.FetchByte(pc);
pc.Increment;
lcol := FMemory.FetchByte(pc);
pc.Increment;
op := FedSysOperand(mrow, mcol, lrow, lcol);
FMemory.StoreOperand(op);
// If we have just fetched the last instn in a row,
// bump to the next row.
pc.Decode(bank, row, col);
if (col = 31) then
pc.Increment;
FMemory.StorePAK(pc);
if (Assigned(FOnFetchInstruction)) then
FOnFetchInstruction(Self);
FState := FState + [ucsInstructionFetched];
end;
procedure T1005FedSysCPU.IC;
var
addr: I1005Addr;
limit, incr, count: TBcd;
test: Integer;
begin
addr := T1005FedSysAddr.Create;
addr.Assign(FMemory.FetchFedSysOperand.M);
limit := FMemory.FetchBcd(addr, 2);
addr.Increment;
addr.Increment;
count := FMemory.FetchBcd(addr, 2);
addr.Increment;
addr.Increment;
incr := FMemory.FetchBcd(addr, 1);
count := count + incr;
test := BcdCompare(count, limit);
if (test < 0) then
FMemory.StoreIndicator(IND_LESS)
else if (test > 0) then
FMemory.StoreIndicator(IND_GREATER)
else
FMemory.StoreIndicator(IND_EQUAL);
addr.Assign(FMemory.FetchFedSysOperand.M);
addr.Increment;
addr.Increment;
FMemory.StoreBcd(addr, 2, count);
end;
procedure T1005FedSysCPU.J;
begin
FMemory.StorePAK(FMemory.FetchFedSysOperand.M);
end;
procedure T1005FedSysCPU.J0;
// Jump if indicator zero. JE / JEA / JZ
begin
if (FMemory.FetchIndicator = IND_EQUAL) then
FMemory.StorePAK(FMemory.FetchFedSysOperand.M);
end;
procedure T1005FedSysCPU.J1;
// Jump if indicator 1. JUA / JL/ JP
begin
if (FMemory.FetchIndicator = IND_NOT_EQUAL) then
FMemory.StorePAK(FMemory.FetchFedSysOperand.M);
end;
procedure T1005FedSysCPU.J2;
// Jump if indicator 2. JG
begin
if (FMemory.FetchIndicator = IND_GREATER) then
FMemory.StorePAK(FMemory.FetchFedSysOperand.M);
end;
procedure T1005FedSysCPU.JR;
begin
FMemory.StoreFedSysX(FMemory.FetchPAK);
FMemory.StorePAK(FMemory.FetchFedSysOperand.M);
end;
procedure T1005FedSysCPU.JX;
var
op: T1005FedSysOperand;
addr: I1005Addr;
begin
op := FMemory.FetchFedSysOperand;
addr := FMemory.FetchFedSysX;
FMemory.StoreByte(op.M, X3_2); // Store J operand
op.M.Increment;
FMemory.StoreByte(op.M, addr.Row); // Save return addr msb
op.M.Increment;
FMemory.StoreByte(op.M, addr.Col);
op.M.Increment;
addr.SetAddr(addr.SequentialAddr + 4);
FMemory.StoreByte(op.M, addr.Row); // Save return addr lsb
op.M.Increment;
FMemory.StoreByte(op.M, addr.Col);
end;
procedure T1005FedSysCPU.LA1;
var
len: Integer;
i: Integer;
op: T1005FedSysOperand;
begin
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := Min(op.L.SequentialAddr - op.M.SequentialAddr + 1, 10);
i := 10;
while (len > 0) do
begin
FMemory.StoreAR1(i, FMemory.FetchByte(op.L));
op.L.Decrement;
Dec(len);
Dec(i);
end;
while (i > 0) do
begin
FMemory.StoreAR1(i, X3_SPACE);
Dec(i);
end;
end;
procedure T1005FedSysCPU.LA2;
var
len: Integer;
i: Integer;
op: T1005FedSysOperand;
begin
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := Min(op.L.SequentialAddr - op.M.SequentialAddr + 1, 21);
i := 21;
while (len > 0) do
begin
FMemory.StoreAR2(i, FMemory.FetchByte(op.L));
op.L.Decrement;
Dec(len);
Dec(i);
end;
while (i > 0) do
begin
FMemory.StoreAR2(i, X3_SPACE);
Dec(i);
end;
end;
procedure T1005FedSysCPU.LD1;
var
len: Integer;
i: Integer;
op: T1005FedSysOperand;
begin
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := Min(op.L.SequentialAddr - op.M.SequentialAddr + 1, 10);
i := 1;
while (i <= len) do
begin
FMemory.StoreAR1(i, FMemory.FetchByte(op.M));
op.M.Increment;
Inc(i);
end;
while (i <= 10) do
begin
FMemory.StoreAR1(i, X3_SPACE);
Inc(i);
end;
end;
procedure T1005FedSysCPU.LD2;
var
len: Integer;
i: Integer;
op: T1005FedSysOperand;
begin
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := Min(op.L.SequentialAddr - op.M.SequentialAddr + 1, 21);
i := 1;
while (i <= len) do
begin
FMemory.StoreAR2(i, FMemory.FetchByte(op.M));
op.M.Increment;
Inc(i);
end;
while (i <= 21) do
begin
FMemory.StoreAR2(i, X3_SPACE);
Inc(i);
end;
end;
procedure T1005FedSysCPU.LN1;
var
i: Integer;
b: Byte;
begin
// Transfer to register
LA1;
// Strip zone bits
for i := 1 to 10 do
begin
b := FMemory.FetchAR1(i) and $0f;
FMemory.StoreAR1(i, b);
end;
end;
procedure T1005FedSysCPU.LN2;
var
i: Integer;
b: Byte;
begin
// Transfer to register
LA2;
// Strip zone bits
for i := 1 to 21 do
begin
b := FMemory.FetchAR2(i) and $0f;
FMemory.StoreAR2(i, b);
end;
end;
procedure T1005FedSysCPU.LPR;
var
len: Integer;
op: T1005FedSysOperand;
pr: I1005Addr;
begin
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := Min(op.L.SequentialAddr - op.M.SequentialAddr + 1, 132);
pr := T1005FedSysAddr.Create;
pr.SetAddr(PRINTER_BUFFER + len);
MemClear(pr, 132 - len);
pr.SetAddr(PRINTER_BUFFER);
MemCpy(pr, op.M, len);
end;
procedure T1005FedSysCPU.LWS;
var
i: Integer;
b, sign: Byte;
begin
// Transfer memory to AR2
LA2;
// Determine sign
b := FMemory.FetchAR2(21);
if ((b and $20) <> 0) then
sign := X3_MINUS
else
sign := X3_SPACE;
// Stip zone and shift AR2 left 1 byte
for i := 2 to 21 do
begin
b := FMemory.FetchAR2(i) and $0f;
FMemory.StoreAR2(i - 1, b);
end;
// Add sign to AR2
FMemory.StoreAR2(21, sign);
end;
procedure T1005FedSysCPU.MemClear(const dest: I1005Addr; len: Integer);
begin
while (len > 0) do
begin
FMemory.StoreByte(dest, X3_SPACE);
dest.Increment;
Dec(len);
end;
end;
procedure T1005FedSysCPU.MemCpy(const dest, src: I1005Addr; len: Integer);
begin
while (len > 0) do
begin
FMemory.StoreByte(dest, FMemory.FetchByte(src));
dest.Increment;
src.Increment;
Dec(len);
end;
end;
procedure T1005FedSysCPU.MUL;
var
op: T1005FedSysOperand;
len: Integer;
op1, op2, rslt: TBcd;
begin
op := FMemory.FetchFedSysOperand;
len := Min(8, op.L.SequentialAddr - op.M.SequentialAddr + 1);
op1 := FMemory.FetchBcd(op.M, len);
op1.SignSpecialPlaces := op1.SignSpecialPlaces and $7f; // clear negative flag
op2 := FMemory.FetchAR1Bcd(9);
op2.SignSpecialPlaces := op2.SignSpecialPlaces and $7f; // clear negative flag
rslt := op1 * op2;
FMemory.StoreAR2Bcd(rslt);
end;
procedure T1005FedSysCPU.PrintSpace(count: Integer);
var
i: Integer;
addr: I1005Addr;
begin
FPrinter.Print;
addr := T1005FedSysAddr.Create;
addr.SetAddr(PRINTER_BUFFER);
for i := 1 to 132 do
FMemory.StoreByte(addr, X3_SPACE);
FPrinter.Space(count);
if (FAlt2 and (FMemory.FetchIndicator = IND_LESS)) then
FPrinter.Skip(7);
end;
procedure T1005FedSysCPU.Punch(stacker: Cardinal; image: Cardinal);
begin
if (stacker = 0) then
stacker := 1
else
stacker := 2;
if (image = 0) then
FPunch.Punch(stacker)
else
FPunch.PunchImage(stacker);
end;
procedure T1005FedSysCPU.PunchPaperTape(count: Integer);
begin
{ TODO : Need to implement someday }
raise Exception.Create('Not implemented');
end;
procedure T1005FedSysCPU.Read(image: Cardinal);
var
rslt: Boolean;
begin
if (image = 0) then
rslt := FReader.ReadImage
else
rslt := FReader.Read;
if (not rslt) then
raise Exception.Create('Reader error');
end;
procedure T1005FedSysCPU.ReadAux(stacker: Cardinal);
begin
{ TODO : Need to implement someday }
raise Exception.Create('Not implemented');
end;
procedure T1005FedSysCPU.ReadPaperTape(count: Integer);
begin
{ TODO : Need to implement someday }
raise Exception.Create('Not implemented');
end;
procedure T1005FedSysCPU.ReadPunch(stacker: Cardinal; image: Cardinal);
begin
{ TODO : Need to implement someday }
raise Exception.Create('Not implemented');
end;
procedure T1005FedSysCPU.SA1;
var
len: Integer;
i: Integer;
op: T1005FedSysOperand;
begin
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
i := 10;
while ((len > 0) and (i > 0)) do
begin
FMemory.StoreByte(op.L, FMemory.FetchAR1(i));
op.L.Decrement;
Dec(len);
Dec(i);
end;
while (len > 0) do
begin
FMemory.StoreByte(op.L, X3_SPACE);
op.L.Decrement;
Dec(len);
end;
end;
procedure T1005FedSysCPU.SA2;
var
len: Integer;
i: Integer;
op: T1005FedSysOperand;
begin
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
i := 21;
while ((len > 0) and (i > 0)) do
begin
FMemory.StoreByte(op.L, FMemory.FetchAR2(i));
op.L.Decrement;
Dec(len);
Dec(i);
end;
while (len > 0) do
begin
FMemory.StoreByte(op.L, X3_SPACE);
op.L.Decrement;
Dec(len);
end;
end;
procedure T1005FedSysCPU.SD1;
var
len: Integer;
i: Integer;
op: T1005FedSysOperand;
begin
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
i := 1;
while ((i <= 10) and (i <= len)) do
begin
FMemory.StoreByte(op.M, FMemory.FetchAR1(i));
op.M.Increment;
Inc(i);
end;
while (i <= len) do
begin
FMemory.StoreByte(op.M, X3_SPACE);
op.M.Increment;
Inc(i);
end;
end;
procedure T1005FedSysCPU.SD2;
var
len: Integer;
i: Integer;
op: T1005FedSysOperand;
begin
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
i := 1;
while ((i <= 21) and (i <= len)) do
begin
FMemory.StoreByte(op.M, FMemory.FetchAR2(i));
op.M.Increment;
Inc(i);
end;
while (i <= len) do
begin
FMemory.StoreByte(op.M, X3_SPACE);
op.M.Increment;
Inc(i);
end;
end;
procedure T1005FedSysCPU.SED;
var
op: T1005FedSysOperand;
addr1, addr2, addr3, addr4: I1005Addr;
len: Integer;
begin
addr1 := T1005FedSysAddr.Create;
addr2 := T1005FedSysAddr.Create;
addr3 := T1005FedSysAddr.Create;
addr4 := T1005FedSysAddr.Create;
// Transfer AR2 to memory with zero suppression
SZS;
// Insert editing characters
op := FMemory.FetchFedSysOperand;
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
if (len < 4) then // Too few characters to edit
Exit;
// Insert the decimal point
addr1 := op.M; // addr1 = MSB
addr2 := addr1; // addr2 = MSB + 1
addr2.Increment;
len := len - 3;
MemCpy(addr1, addr2, len);
addr3.SetAddr(op.L.SequentialAddr - 3);
FMemory.StoreByte(addr3, X3_PERIOD);
// Insert the commas
len := len - 4;
addr3.SetAddr(addr3.SequentialAddr - 4);
addr4.SetAddr(addr3.SequentialAddr + 1);
while (len > 0) do
begin
if ((FMemory.FetchByte(addr3) <> X3_SPACE) and (FMemory.FetchByte(addr4) <> X3_SPACE)) then
begin
MemCpy(addr1, addr2, len);
FMemory.StoreByte(addr3, X3_COMMA);
addr3.SetAddr(addr3.SequentialAddr - 4);
addr4.SetAddr(addr4.SequentialAddr - 4);
len := len - 4;
end else
Break;
end;
end;
procedure T1005FedSysCPU.SHIFTL;
var
op: T1005FedSysOperand;
src, dest: I1005Addr;
count: Integer;
bank, row, col: Byte;
begin
src := T1005FedSysAddr.Create;
dest := T1005FedSysAddr.Create;
op := FMemory.FetchFedSysOperand;
op.M.Decode(bank, row, col);
count := col;
op.M.SetAddr(bank, row, 1);
src.SetAddr(op.M.SequentialAddr + count);
dest := op.M;
while (src.Compare(op.L) <= 0) do
begin
FMemory.StoreByte(dest, FMemory.FetchByte(src));
src.Increment;
dest.Increment;
end;
while (count > 0) do
begin
FMemory.StoreByte(dest, X3_SPACE);
dest.Increment;
Dec(count);
end;
end;
procedure T1005FedSysCPU.SHIFTR;
var
op: T1005FedSysOperand;
src, dest: I1005Addr;
count: Integer;
bank, row, col: Byte;
begin
src := T1005FedSysAddr.Create;
dest := T1005FedSysAddr.Create;
op := FMemory.FetchFedSysOperand;
op.L.Decode(bank, row, col);
count := col;
op.L.SetAddr(bank, row, 31);
src.SetAddr(op.L.SequentialAddr - count);
dest := op.L;
while (src.Compare(op.M) >= 0) do
begin
FMemory.StoreByte(dest, FMemory.FetchByte(src));
src.Decrement;
dest.Decrement;
end;
while (count > 0) do
begin
FMemory.StoreByte(dest, X3_SPACE);
dest.Decrement;
Dec(count);
end;
end;
procedure T1005FedSysCPU.Skip(chan: Cardinal);
begin
FPrinter.Skip(chan);
end;
procedure T1005FedSysCPU.SM1;
var
op: T1005FedSysOperand;
len, test: Integer;
op1, op2, rslt, zero: TBcd;
begin
op := FMemory.FetchFedSysOperand;
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
op1 := FMemory.FetchBcd(op.M, len);
op2 := FMemory.FetchAR1Bcd(len);
zero := 0;
rslt := op1 - op2;
test := BcdCompare(rslt, zero);
if (test < 0) then
FMemory.StoreIndicator(IND_NEGATIVE)
else if (test > 0) then
FMemory.StoreIndicator(IND_POSITIVE)
else
FMemory.StoreIndicator(IND_ZERO);
FMemory.StoreBcd(op.M, len, rslt);
end;
procedure T1005FedSysCPU.SM2;
var
op: T1005FedSysOperand;
len, test: Integer;
op1, op2, rslt, zero: TBcd;
begin
op := FMemory.FetchFedSysOperand;
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
op1 := FMemory.FetchBcd(op.M, len);
op2 := FMemory.FetchAR2Bcd(len);
zero := 0;
rslt := op1 - op2;
test := BcdCompare(rslt, zero);
if (test < 0) then
FMemory.StoreIndicator(IND_NEGATIVE)
else if (test > 0) then
FMemory.StoreIndicator(IND_POSITIVE)
else
FMemory.StoreIndicator(IND_ZERO);
FMemory.StoreBcd(op.M, len, rslt);
end;
procedure T1005FedSysCPU.SPR;
var
len: Integer;
op: T1005FedSysOperand;
pr: I1005Addr;
begin
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
pr := T1005FedSysAddr.Create;
pr.SetAddr(PRINTER_BUFFER);
MemCpy(op.M, pr, Min(len, 132));
if (len > 132) then
begin
op.M.SetAddr(op.M.SequentialAddr + 132);
MemClear(op.M, len - 132);
end;
end;
procedure T1005FedSysCPU.SR1;
var
op: T1005FedSysOperand;
len, test: Integer;
op1, op2, rslt, zero: TBcd;
begin
op := FMemory.FetchFedSysOperand;
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
op1 := FMemory.FetchBcd(op.M, len);
op2 := FMemory.FetchAR1Bcd(len);
zero := 0;
rslt := op2 - op1;
test := BcdCompare(rslt, zero);
if (test < 0) then
FMemory.StoreIndicator(IND_NEGATIVE)
else if (test > 0) then
FMemory.StoreIndicator(IND_POSITIVE)
else
FMemory.StoreIndicator(IND_ZERO);
FMemory.StoreAR1Bcd(rslt);
end;
procedure T1005FedSysCPU.SR2;
var
op: T1005FedSysOperand;
len, test: Integer;
op1, op2, rslt, zero: TBcd;
begin
op := FMemory.FetchFedSysOperand;
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
op1 := FMemory.FetchBcd(op.M, len);
op2 := FMemory.FetchAR2Bcd(len);
zero := 0;
rslt := op2 - op1;
test := BcdCompare(rslt, zero);
if (test < 0) then
FMemory.StoreIndicator(IND_NEGATIVE)
else if (test > 0) then
FMemory.StoreIndicator(IND_POSITIVE)
else
FMemory.StoreIndicator(IND_ZERO);
FMemory.StoreAR2Bcd(rslt);
end;
procedure T1005FedSysCPU.Start;
begin
FState := FState - [ucsHalted, ucsError];
try
FetchInstruction;
repeat
ExecuteInstruction;
FetchInstruction;
until ((FState * [ucsSingleStep, ucsHalted, ucsError]) <> []);
FState := FState + [ucsHalted];
except
on E: Exception do
begin
if (Assigned(FOnError)) then
FOnError(Self, E);
if (Assigned(FOnDebug)) then
FOnDebug(Self, E);
FState := FState + [ucsError];
if (E is EAssertionFailed) then
Application.ShowException(E);
end;
end;
end;
procedure T1005FedSysCPU.Stop;
begin
FState := FState + [ucsHalted];
end;
procedure T1005FedSysCPU.SZS;
var
len: Integer;
b: Byte;
op: T1005FedSysOperand;
begin
// Transfer AR2 to memory
SA2;
// Zero suppress result
op := FedSysOperand(FCrntOperand.M, FCrntOperand.L);
len := op.L.SequentialAddr - op.M.SequentialAddr + 1;
while (len > 0) do
begin
b := FMemory.FetchByte(op.M);
if ((b <> X3_SPACE) and (b <> X3_0)) then
Break;
FMemory.StoreByte(op.M, X3_SPACE);
op.M.Increment;
Dec(len);
end;
end;
procedure T1005FedSysCPU.XFC;
var
op: T1005FedSysOperand;
bit, bits: Cardinal;
begin
op := FMemory.FedFedSysOperandRaw;
bits := ((OP.M.Row and $3f) shl 18) or // Get all bits into a single 32-bit value
((OP.M.Col and $3f) shl 12) or
((OP.L.Row and $3f) shl 6) or
(OP.L.Col and $3f);
bit := $800000; // starting test bit
while (bit <> 0) do
begin
if ((bits and bit) = 0) then // if under test not set
begin
case bit of
$400000: PrintSpace(1);
$200000: PrintSpace(2);
$100000,
$080000,
$040000: Skip(((bits and $1c0000) shr 18) xor $07);
$010000: Read(bits and $000008);
$008000: ReadAux(bits and $000c00);
$004000: ReadPunch(bits and $000200, bits and $000004);
$002000: Punch(bits and $000200, bits and $000004);
$001000: FState := FState + [ucsHalted];
$000100: ReadPaperTape(1);
$000080: ReadPaperTape(-1);
$000040: ReadPaperTape(80);
$000020: PunchPaperTape(1);
$000002: PunchPaperTape(-1);
$000001: PunchPaperTape(-2);
end;
end;
bit := bit shr 1;
end;
end;
{ T1005CPU }
constructor T1005CPU.Create(mem: T1005Memory; rdr: T1005Reader; prt: T1005Printer; pch: T1005Punch);
begin
inherited Create;
FMemory := mem;
FReader := rdr;
FPrinter := prt;
FPunch := pch;
end;
function T1005CPU.GetSingleStep: Boolean;
begin
Result := (ucsSingleStep in FState);
end;
procedure T1005CPU.SetAlt1(Value: Boolean);
begin
FAlt1 := Value;
end;
procedure T1005CPU.SetAlt2(Value: Boolean);
begin
FAlt2 := Value;
end;
procedure T1005CPU.SetSingleStep(const Value: Boolean);
begin
if (Value) then
Include(FState, ucsSingleStep)
else
Exclude(FState, ucsSingleStep);
end;
{ T1005CommCPU }
procedure T1005CommCPU.AD;
var
op: T1005CommOperands;
len, test: Integer;
op1, op2, rslt, zero: TBcd;
begin
op := FMemory.FetchCommOperands;
op.Fldc.AdjustBankAsc(op.Fldb);
Assert(op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr, 'AD OP2 LSL < MSL');
len := op.Fldc.SequentialAddr - op.Fldb.SequentialAddr + 1;
op.Flda.Decrement(len - 1);
// op.Flda.SetAddr(op.Flda.SequentialAddr - len + 1); // Adjust to start of FldA
op1 := FMemory.FetchBcd(op.Flda, len);
op2 := FMemory.FetchBcd(op.Fldb, len);
zero := 0;
rslt := op1 + op2;
test := BcdCompare(rslt, zero);
FConditionCodes := FConditionCodes and (not CC_SIGNS); // Clear previous sign bits
if (test < 0) then
FConditionCodes := FConditionCodes or CC_SIGN_MINUS
else if (test > 0) then
FConditionCodes := FConditionCodes or CC_SIGN_PLUS
else
FConditionCodes := FConditionCodes or CC_SIGN_ZERO;
if (BcdPrecision(rslt) > len) then
FConditionCodes := FConditionCodes or CC_ARITHMETIC_OVERFLOW;
FMemory.StoreBcd(op.Fldb, len, rslt);
end;
procedure T1005CommCPU.AK;
var
op: T1005CommOperands;
len, test: Integer;
op1, op2, rslt, zero: TBcd;
begin
op := FMemory.FetchCommOperands;
op.Flda.SetAddr(1, 32, 2);
op.Fldc.AdjustBankAsc(op.Fldb);
Assert(op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr, 'AK OP2 LSL < MSL');
len := op.Fldc.SequentialAddr - op.Fldb.SequentialAddr + 1;
op1 := FMemory.FetchBcd(op.Flda, 2);
op2 := FMemory.FetchBcd(op.Fldb, len);
zero := 0;
rslt := op1 + op2;
test := BcdCompare(rslt, zero);
FConditionCodes := FConditionCodes and (not CC_SIGNS); // Clear previous sign bits
if (test < 0) then
FConditionCodes := FConditionCodes or CC_SIGN_MINUS
else if (test > 0) then
FConditionCodes := FConditionCodes or CC_SIGN_PLUS
else
FConditionCodes := FConditionCodes or CC_SIGN_ZERO;
if (BcdPrecision(rslt) > len) then
FConditionCodes := FConditionCodes or CC_ARITHMETIC_OVERFLOW;
FMemory.StoreBcd(op.Fldb, len, rslt);
end;
procedure T1005CommCPU.AM;
var
op: T1005CommOperands;
len, test: Integer;
op1, op2, rslt, zero: TBcd;
begin
op := FMemory.FetchCommOperands;
op.Fldc.AdjustBankAsc(op.Fldb);
Assert(op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr, 'AM OP2 LSL < MSL');
len := op.Fldc.SequentialAddr - op.Fldb.SequentialAddr + 1;
op.Flda.Decrement(len - 1);
// op.Flda.SetAddr(op.Flda.SequentialAddr - len + 1); // Adjust to start of FldA
op1 := FMemory.FetchBcd(op.Flda, len);
op1.SignSpecialPlaces := op1.SignSpecialPlaces and $7f;
op2 := FMemory.FetchBcd(op.Fldb, len);
op2.SignSpecialPlaces := op2.SignSpecialPlaces and $7f;
zero := 0;
rslt := op1 + op2;
test := BcdCompare(rslt, zero);
FConditionCodes := FConditionCodes and (not CC_SIGNS); // Clear previous sign bits
if (test < 0) then
FConditionCodes := FConditionCodes or CC_SIGN_MINUS
else if (test > 0) then
FConditionCodes := FConditionCodes or CC_SIGN_PLUS
else
FConditionCodes := FConditionCodes or CC_SIGN_ZERO;
if (BcdPrecision(rslt) > len) then
FConditionCodes := FConditionCodes or CC_ARITHMETIC_OVERFLOW;
FMemory.StoreBcd(op.Fldb, len, rslt);
end;
procedure T1005CommCPU.BT;
// This implements and undocumented instruction with opcode V. This
// instrcutions seems to be "read card and jump to address zero".
// Which is, effectively a request to boot from card.
begin
InitBoot;
end;
procedure T1005CommCPU.CA;
var
op: T1005CommOperands;
op1, op2: Byte;
begin
op := FMemory.FetchCommOperands;
op.Fldc.AdjustBankAsc(op.Fldb);
Assert(op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr, 'CA OP2 LSL < MSL');
FConditionCodes := FConditionCodes and (not CC_TESTS);
while (not op.Fldc.Matches(op.Fldb)) do
begin
op1 := FMemory.FetchByte(op.Flda);
op2 := FMemory.FetchByte(op.Fldc);
if (op1 <> op2) then
begin
FConditionCodes := FConditionCodes or CC_NOT_EQUAL;
Exit;
end;
op.Flda.Decrement;
op.Fldc.Decrement;
end;
op1 := FMemory.FetchByte(op.Flda);
op2 := FMemory.FetchByte(op.Fldc);
if (op1 <> op2) then
FConditionCodes := FConditionCodes or CC_NOT_EQUAL
else
FConditionCodes := FConditionCodes or CC_EQUAL;
end;
procedure T1005CommCPU.CC;
var
op: T1005CommOperands;
count: TBcd;
addr: I1005Addr;
row, col: Byte;
begin
op := FMemory.FetchCommOperands;
addr := T1005CommAddr.Create;
addr.SetAddr(1, 32, 2);
count := FMemory.FetchBcd(addr, 2);
addr.SetAddr(op.Fldb.Row, op.Fldb.Col);
row := FMemory.FetchByte(addr);
addr.Increment;
col := FMemory.FetchByte(addr);
addr.SetAddr(row, col);
if (count > 0) then
begin
addr.Increment(BcdToInteger(count));
end else if (count < 0) then
begin
addr.Decrement(-BcdToInteger(count));
end;
// addr.SetAddr(addr.SequentialAddr + BcdToInteger(count));
FMemory.StoreByte(op.Fldb, addr.Row);
op.Fldb.Increment;
FMemory.StoreByte(op.Fldb, addr.Col);
end;
procedure T1005CommCPU.CK;
var
op: T1005CommOperands;
count: Integer;
op1, op2: Byte;
begin
op := FMemory.FetchCommOperands;
op.Flda.SetAddr(1, 32, 3);
op.Fldc.AdjustBankAsc(op.Fldb);
Assert(op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr, 'CK OP2 LSL < MSL');
count := 0;
FConditionCodes := FConditionCodes and (not CC_TESTS);
// Check at most first 2 bytes of OP2 for a match to OP1
while ((not op.Fldc.Matches(op.Fldb)) and (count < 2)) do
begin
op1 := FMemory.FetchByte(op.Flda);
op2 := FMemory.FetchByte(op.Fldc);
if (op1 <> op2) then
begin
FConditionCodes := FConditionCodes or CC_NOT_EQUAL;
Exit;
end;
op.Flda.Decrement;
op.Fldc.Decrement;
Inc(count);
end;
// No match so far. If there were exactly 1 or 2 bytes to check,
// check the last one for a match to OP1.
if (op.Fldc.Matches(op.Fldb)) then
begin
op1 := FMemory.FetchByte(op.Flda);
op2 := FMemory.FetchByte(op.Fldc);
if (op1 <> op2) then
FConditionCodes := FConditionCodes or CC_NOT_EQUAL
else
FConditionCodes := FConditionCodes or CC_EQUAL;
Exit;
end;
// Check bytes remaining beyond the first 2 for spaces.
while (not op.Fldc.Matches(op.Fldb)) do
begin
op2 := FMemory.FetchByte(op.Fldc);
if (op2 <> X3_SPACE) then
begin
FConditionCodes := FConditionCodes or CC_NOT_EQUAL;
Exit;
end;
op.Fldc.Decrement;
end;
op2 := FMemory.FetchByte(op.Fldc);
if (op2 <> X3_SPACE) then
begin
FConditionCodes := FConditionCodes or CC_NOT_EQUAL;
Exit;
end;
FConditionCodes := FConditionCodes or CC_EQUAL;
end;
procedure T1005CommCPU.Clear;
begin
FState := [ucsHalted, ucsInstructionFetched];
// Clear all conditions except ALT1 and ALT2.
FConditionCodes := FConditionCodes and (CC_ALTERNATE_HOLD1 or CC_ALTERNATE_HOLD2);
//
InitBoot;
end;
procedure T1005CommCPU.CM;
var
op: T1005CommOperands;
len, test: Integer;
op1, op2: TBcd;
begin
op := FMemory.FetchCommOperands;
op.Fldc.AdjustBankAsc(op.Fldb);
Assert(op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr, 'CM OP2 LSL < MSL');
len := op.Fldc.SequentialAddr - op.Fldb.SequentialAddr + 1;
op.Flda.Decrement(len - 1);
// op.Flda.SetAddr(op.Flda.SequentialAddr - len + 1); // Adjust to beginning of FldA
op1 := FMemory.FetchBcd(op.Flda, len);
op1.SignSpecialPlaces := op1.SignSpecialPlaces and $7f;
op2 := FMemory.FetchBcd(op.Fldb, len);
op2.SignSpecialPlaces := op2.SignSpecialPlaces and $7f;
test := BcdCompare(op1, op2);
FConditionCodes := FConditionCodes and (not CC_TESTS); // Clear previous comparison bits
if (test < 0) then
FConditionCodes := FConditionCodes or CC_LESS_THAN
else if (test > 0) then
FConditionCodes := FConditionCodes or CC_GREATER_THAN
else
FConditionCodes := FConditionCodes or CC_EQUAL;
end;
procedure T1005CommCPU.CN;
var
op: T1005CommOperands;
len, test: Integer;
op1, op2: TBcd;
begin
op := FMemory.FetchCommOperands;
op.Fldc.AdjustBankAsc(op.Fldb);
Assert(op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr, 'CN OP2 LSL < MSL');
len := op.Fldc.SequentialAddr - op.Fldb.SequentialAddr + 1;
op.Flda.Decrement(len - 1);
// op.Flda.SetAddr(op.Flda.SequentialAddr - len + 1); // Adjust to start of FldA
op1 := FMemory.FetchBcd(op.Flda, len);
op2 := FMemory.FetchBcd(op.Fldb, len);
test := BcdCompare(op1, op2);
FConditionCodes := FConditionCodes and (not CC_TESTS); // Clear previous comparison bits
if (test < 0) then
FConditionCodes := FConditionCodes or CC_LESS_THAN
else if (test > 0) then
FConditionCodes := FConditionCodes or CC_GREATER_THAN
else
FConditionCodes := FConditionCodes or CC_EQUAL;
end;
constructor T1005CommCPU.Create(mem: T1005Memory; rdr: T1005Reader; prt: T1005Printer; pch: T1005Punch);
begin
inherited;
FOpcodes := T1005OpcodeList.Create;
FOpcodes.AddOpcode(OpCode(X3_0, 'TA', it2Operand, True, TA));
FOpcodes.AddOpcode(OpCode(X3_4, 'TC', it2Operand, True, TC));
FOpcodes.AddOpcode(OpCode(X3_RIGHT_SQUARE, 'TD', it2Operand, True, TD));
FOpcodes.AddOpcode(OpCode(X3_2, 'TK', it2Operand, True, TK));
FOpcodes.AddOpcode(OpCode(X3_SEMI, 'TN', it2Operand, True, TN));
FOpcodes.AddOpcode(OpCode(X3_9, 'TR', it2Operand, True, TR));
FOpcodes.AddOpcode(OpCode(X3_Z, 'TX', it1Operand, False, TX));
FOpcodes.AddOpcode(OpCode(X3_I, 'CA', it2Operand, True, CA));
FOpcodes.AddOpcode(OpCode(X3_7, 'CK', it2Operand, True, CK));
FOpcodes.AddOpcode(OpCode(X3_F, 'CM', it2Operand, True, CM));
FOpcodes.AddOpcode(OpCode(X3_PERIOD, 'CN', it2Operand, True, CN));
FOpcodes.AddOpcode(OpCode(X3_1, 'AD', it2Operand, True, AD));
FOpcodes.AddOpcode(OpCode(X3_5, 'AM', it2Operand, True, AM));
FOpcodes.AddOpcode(OpCode(X3_AT, 'DV', it2Operand, False, DV));
FOpcodes.AddOpcode(OpCode(X3_M, 'ML', it2Operand, False, ML));
FOpcodes.AddOpcode(OpCode(X3_ASTERIX, 'MU', it2Operand, False, MU));
FOpcodes.AddOpcode(OpCode(X3_MINUS, 'SM', it2Operand, True, SM));
FOpcodes.AddOpcode(OpCode(X3_COLON, 'SU', it2Operand, True, SU));
FOpcodes.AddOpcode(OpCode(X3_6, 'AK', it2Operand, True, AK));
FOpcodes.AddOpcode(OpCode(X3_W, 'CC', it1Operand, False, CC));
FOpcodes.AddOpcode(OpCode(X3_COMMA, 'EL', it2Operand, False, EL));
FOpcodes.AddOpcode(OpCode(X3_G, 'ED', it2Operand, True, ED));
FOpcodes.AddOpcode(OpCode(X3_LOZENGE, 'SC', it1Operand, False, SC));
FOpcodes.AddOpcode(OpCode(X3_X, 'JC', it1Operand, False, JC));
FOpcodes.AddOpcode(OpCode(X3_LEFT_PAREN, 'JK', it2Operand, False, JK));
FOpcodes.AddOpcode(OpCode(X3_J, 'JL', it2Operand, False, JL));
FOpcodes.AddOpcode(OpCode(X3_N, 'JR', it2Operand, False, JR));
FOpcodes.AddOpcode(OpCode(X3_Y, 'JT', it1Operand, False, JT));
FOpcodes.AddOpcode(OpCode(X3_SLASH, 'J', it1Operand, False, J));
FOpcodes.AddOpcode(OpCode(X3_PERCENT, 'GC', it2Operand, False, GC));
FOpcodes.AddOpcode(OpCode(X3_DOLLAR, 'RT', it2Operand));
FOpcodes.AddOpcode(OpCode(X3_K, 'WT', it2Operand));
FOpcodes.AddOpcode(OpCode(X3_P, 'RD', it2Operand));
FOpcodes.AddOpcode(OpCode(X3_S, 'SD', it2Operand));
FOpcodes.AddOpcode(OpCode(X3_Q, 'RF', it2Operand));
FOpcodes.AddOpcode(OpCode(X3_U, 'SF', it2Operand));
FOpcodes.AddOpcode(OpCode(X3_V, 'BT', it1Operand, False, BT));
end;
destructor T1005CommCPU.Destroy;
begin
FreeAndNil(FOpcodes);
inherited;
end;
procedure T1005CommCPU.DV;
var
op: T1005CommOperands;
op1, op2, op3, op4: I1005Addr;
dividend, divisor, quotient, remainder: TBcd;
begin
op := FMemory.FetchCommOperands;
op1 := op.Flda.Clone;
op2 := T1005CommAddr.Create;
op3 := op.Fldc.Clone;
op4 := T1005CommAddr.Create;
op1.Decrement(5);
// op1.SetAddr(op.Flda.SequentialAddr - 5);
op2 := op.Fldb;
op3.Decrement(7);
// op3.SetAddr(op.Fldc.SequentialAddr - 7);
divisor := FMemory.FetchBcd(op1, 6);
if (divisor < 0) then
divisor := divisor * -1;
dividend := FMemory.FetchBcd(op2, 8);
if (dividend < 0) then
dividend := dividend * -1;
quotient := dividend / divisor;
FMemory.StoreBcd(op3, 8, quotient);
// Calculate and save the remainder.
// First get rid of the fractional part of the result by setting
// the precision of the result to be the number of places left of
// the decimal and setting the scale to zero by clearing the rightmost
// 6 bits of SignSpecialPlaces.
quotient.Precision := BcdPrecision(quotient);
quotient.SignSpecialPlaces := quotient.SignSpecialPlaces and $C0;
remainder := dividend - (divisor * quotient);
op4.SetAddr(1, 32, 18);
FMemory.StoreBcd(op4, 6, remainder);
end;
procedure T1005CommCPU.ED;
var
op: T1005CommOperands;
op1, fill, xc: Byte;
x: Integer;
done, suppress, copy: Boolean;
begin
op := FMemory.FetchCommOperands;
// Phase one. Edit the OP1 according to the edit mask in X.
// X3_BACK_SLASH - zero suppress and asterix fill
// X3_DELTA - zero suppress and space fill
// X3_LOZENGE - copy character to output
// X3_NOT_EQUAL - end of mask
done := False;
suppress := False;
fill := X3_SPACE;
x := 1;
while (not done) do
begin
copy := False;
op1 := FMemory.FetchByte(op.Flda) and $0f; // Strip off X & Y bits
xc := FMemory.FetchCommX(x);
case (xc) of
X3_BACK_SLASH:
begin
suppress := True;
fill := X3_ASTERIX;
copy := True;
end;
X3_DELTA:
begin
suppress := True;
fill := X3_SPACE;
copy := True;
end;
X3_LOZENGE:
begin
copy := True;
end;
X3_NOT_EQUAL:
begin
done := True;
FMemory.StoreCommX(x, X3_SPACE);
copy := False;
end;
end;
if (copy) then
begin
if (((op1 = X3_0) or (op1 = X3_COMMA) or (op1 = X3_SPACE)) and
(suppress)) then
begin
FMemory.StoreCommX(x, fill);
end else
begin
FMemory.StoreCommX(x, op1);
suppress := False;
end;
op.Flda.Increment;
end else
begin
if (((xc = X3_0) or (xc = X3_COMMA) or (xc = X3_SPACE)) and suppress) then
begin
FMemory.StoreCommX(x, fill);
end else
begin
suppress := False;
end;
end;
Inc(x);
if (x > 31) then
done := True;
end;
// Phase 2, copy X to OP2
x := 1;
while ((not op.Fldb.Matches(op.Fldc)) and (x <= 31)) do
begin
FMemory.StoreByte(op.Fldb, FMemory.FetchCommX(x));
op.Fldb.Increment;
Inc(x);
end;
if (x <= 31) then
FMemory.StoreByte(op.Fldb, FMemory.FetchCommX(x));
end;
procedure T1005CommCPU.EL;
var
op: T1005CommOperands;
begin
op := FMemory.FetchCommOperands;
FMemory.StoreByte(op.Fldb, FMemory.FetchByte(op.Fldb) and op.Flda.Row);
FMemory.StoreByte(op.Fldc, FMemory.FetchByte(op.Fldc) or op.Flda.Col);
end;
procedure T1005CommCPU.ExecuteInstruction;
var
op: Byte;
begin
FState := FState - [ucsInstructionFetched];
if (Assigned(FOnExecuteInstruction)) then
FOnExecuteInstruction(Self);
if (Assigned(FOnDebug)) then
FOnDebug(Self, nil);
op := FMemory.FetchCommOpcode;
FCrntOpcode := FOpcodes.FindOpcode(op, 0);
if (Assigned(FCrntOpcode.Proc)) then
FCrntOpcode.Proc;
end;
procedure T1005CommCPU.FetchInstruction;
var
ilen, idx: Integer;
op: Byte;
icc, addr: I1005Addr;
opcode: T1005Opcode;
begin
if ((FState * [ucsInstructionFetched, ucsHalted, ucsError]) <> []) then
Exit;
addr := T1005CommAddr.Create;
// Get current instruction counter
icc := FMemory.FetchICC;
// Copy the instruction to the instruction register and
// increment the instruction counter
op := FMemory.FetchByte(icc);
FMemory.StoreIR(op, 1);
opcode := FOpcodes.FindOpcode(op, 0);
icc.Increment;
case opcode.InstType of
it1Operand: ilen := 5;
it2Operand: ilen := 7;
else raise Exception.Create('OOOPS! Unknown instruction type');
end;
idx := 2;
while (idx <= ilen) do
begin
op := FMemory.FetchByte(icc);
FMemory.StoreIR(op, idx);
Inc(idx);
icc.Increment;
end;
// Perform address substitution for indirect addressing.
if (opcode.Indirect) then
begin
// operand 1 indirection
if ((FMemory.FetchByte(1, 32, 6) and $20) <> 0) then
begin
addr.SetAddr(FMemory.FetchByte(1, 32, 2), FMemory.FetchByte(1, 32, 3));
for idx := 2 to 3 do
begin
FMemory.StoreIR(FMemory.FetchByte(addr), idx);
addr.Increment;
end;
end;
// operand 2 indirection
if ((FMemory.FetchByte(1, 32, 7) and $20) <> 0) then
begin
addr.SetAddr(FMemory.FetchByte(1, 32, 4), FMemory.FetchByte(1, 32, 5));
for idx := 4 to 7 do
begin
FMemory.StoreIR(FMemory.FetchByte(addr), idx);
addr.Increment;
end;
end;
end;
//
FMemory.StoreICC(icc);
if (Assigned(FOnFetchInstruction)) then
FOnFetchInstruction(Self);
FState := FState + [ucsInstructionFetched];
end;
procedure T1005CommCPU.GC;
var
op: T1005CommOperands;
spaceBefore, skipBefore: Byte;
image, exec, allOnes, print90: Boolean;
punch, punchHold, punchClear, punchTest: Boolean;
i, count: Integer;
bfr: I1005Addr;
begin
try
bfr := T1005CommAddr.Create;
op := FMemory.FetchCommOperands;
spaceBefore := 0;
skipBefore := 0;
if ((op.Flda.Row and $08) <> 0) then
Include(FIOFlipFlops, ffPrint);
if ((op.Flda.Row and $04) <> 0) then
spaceBefore := 1;
if ((op.Flda.Row and $02) <> 0) then
Include(FIOFlipFlops, ffRead);
exec := (op.Flda.Row and $01) <> 0;
if ((op.Flda.Col and $02) <> 0) then
Include(FIOFlipFlops, ffPunchRead);
image := (op.Flda.Col and $01) <> 0;
allOnes := (op.Fldb.Row and $20) <> 0;
if ((op.Fldb.Col and $10) <> 0) then
skipBefore := skipBefore or 4;
if ((op.Fldb.Col and $08) <> 0) then
skipBefore := skipBefore or 2;
if ((op.Fldb.Col and $04) <> 0) then
skipBefore := skipBefore or 1;
if ((op.Fldb.Col and $02) <> 0) then
spaceBefore := 2;
print90 := (op.Fldb.Col and $01) <> 0;
punch := (op.Fldc.Col and $0e) <> 0;
punchHold := (op.Fldc.Col and $80) <> 0;
punchClear := (op.Fldc.Col and $04) <> 0;
punchTest := (op.Fldc.Col and $02) <> 0;
if (not exec) then
begin
// Before execute functions
if (spaceBefore <> 0) then
begin
if (FPrinter.Space(spaceBefore)) then
FConditionCodes := FConditionCodes or CC_FORM_OVERFLOW;
end;
if (skipBefore <> 0) then
FPrinter.Skip(skipBefore);
end;
// Perform immediate operations
if (punch) then
begin
// Because all I/O in the emulator is syncrhonous, the Punch Test
// operation is a NOOP.
if (punchTest) then
;
if (punchHold or punchClear) then
begin
if (ffStackerSelect in FIOFlipFlops) then
begin
if (image) then
begin
if (not FPunch.PunchImage(2)) then
raise EPunchError.Create('Punch error');
end else
begin
if (not FPunch.Punch(2)) then
raise EPunchError.Create('Punch error');
end;
end else
begin
if (image) then
begin
if (not FPunch.PunchImage(1)) then
raise EPunchError.Create('Punch error');
end else
begin
if (not FPunch.Punch(1)) then
raise EPunchError.Create('Punch error');
end;
end;
if (punchClear) then
begin
bfr.SetAddr(PUNCH_BUFFER);
if (image) then
count := 160
else
count := 80;
for i := 1 to count do
begin
FMemory.StoreByte(bfr, X3_SPACE);
bfr.Increment;
end;
end;
end;
end;
// Perform any pending operations if execute is set
if (exec) then
begin
if (ffPrint in FIOFlipFlops) then
begin
if (spaceBefore <> 0) then
begin
if (FPrinter.Space(spaceBefore)) then
FConditionCodes := FConditionCodes or CC_FORM_OVERFLOW;
end;
if (skipBefore <> 0) then
FPrinter.Skip(skipBefore);
if (print90) then
i := 90
else
i := 132;
FPrinter.Print(i);
bfr.SetAddr(PRINTER_BUFFER);
while (i > 0) do
begin
FMemory.StoreByte(bfr, X3_SPACE);
bfr.Increment;
Dec(i);
end;
end;
if (ffRead in FIOFlipFlops) then
begin
if (image) then
begin
if (not FReader.ReadImage(allOnes)) then
raise EReaderError.Create('Reader error');
end else
begin
if (not FReader.Read(allOnes)) then
raise EReaderError.Create('Reader error');
end;
end;
if (ffPunchRead in FIOFlipFlops) then
{ TODO : Not yet implemented. Need to read up on this. };
FIOFlipFlops := [];
end;
// After execute options
if ((op.Fldc.Col and $10) <> 0) then
Include(FIOFlipFlops, ffStackerSelect);
except
on E: EReaderError do
begin
// Not sure if this is what I should be doing here, but
// programs don't seem to detect reader errors, they just
// expect them to complete. So, decrement the instruction
// counter to allow this I/O to be reissued when the user presses
// Run.
bfr := FMemory.FetchICC;
bfr.Decrement(7);
// for i := 1 to 7 do
// bfr.Decrement;
FMemory.StoreICC(bfr);
raise;
end;
on E: EPunchError do
begin
// Not sure if this is what I should be doing here, but
// programs don't seem to detect punch errors, they just
// expect them to complete. So, decrement the instruction
// counter to allow this I/O to be reissued when the user presses
// Run.
bfr := FMemory.FetchICC;
bfr.Decrement(7);
// for i := 1 to 7 do
// bfr.Decrement;
FMemory.StoreICC(bfr);
raise;
end;
else
raise;
end;
end;
procedure T1005CommCPU.InitBoot;
const
readCard: array [1..7] of Byte = ( X3_PERCENT, X3_0, X3_SPACE, X3_SPACE, X3_SPACE, X3_SPACE, X3_SPACE );
var
i: Integer;
icc: I1005Addr;
begin
for i := 1 to 7 do
FMemory.StoreIR(readCard[i], i);
icc := T1005CommAddr.Create;
icc.SetAddr(X3_SPACE, X3_SPACE);
FMemory.StoreICC(icc);
Include(FState, ucsInstructionFetched);
end;
procedure T1005CommCPU.J;
var
op: T1005CommOperands;
begin
op := FMemory.FetchCommOperands;
FMemory.StoreICC(op.Fldb);
end;
procedure T1005CommCPU.JC;
var
op: T1005CommOperands;
test: Cardinal;
rslt: Boolean;
begin
rslt := False;
op := FMemory.FetchCommOperands;
test := (op.Flda.Row shl 26) or (op.Flda.Col shl 20);
if (((test and CC_END_OF_TAPE) = CC_END_OF_TAPE) and
((FConditionCodes and CC_END_OF_TAPE) = CC_END_OF_TAPE)) then
begin
FConditionCodes := FConditionCodes and (not CC_END_OF_TAPE);
rslt := True;
end;
if (((test and CC_FORM_OVERFLOW) <> 0) and
((FConditionCodes and CC_FORM_OVERFLOW) <>0)) then
begin
FConditionCodes := FConditionCodes and (not CC_FORM_OVERFLOW);
rslt := True;
end;
if (((test and CC_ARITHMETIC_OVERFLOW) <> 0) and
((FConditionCodes and CC_ARITHMETIC_OVERFLOW) <>0)) then
rslt := True;
if (((test and CC_SENSE2) <> 0) and
((FConditionCodes and CC_SENSE2) <>0)) then
rslt := True;
if (((test and CC_SENSE1) <> 0) and
((FConditionCodes and CC_SENSE1) <>0)) then
rslt := True;
if (((test and CC_ALTERNATE_HOLD2) <> 0) and
((FConditionCodes and CC_ALTERNATE_HOLD2) <>0)) then
rslt := True;
if (((test and CC_ALTERNATE_HOLD1) <> 0) and
((FConditionCodes and CC_ALTERNATE_HOLD1) <>0)) then
rslt := True;
if (((test and CC_INTERUUPT) <> 0) and
((FConditionCodes and CC_INTERUUPT) <>0)) then
rslt := True;
if (((test and CC_UNIT_ALERT) <> 0) and
((FConditionCodes and CC_UNIT_ALERT) <>0)) then
rslt := True;
if (((test and CC_PARITY_ERROR) <> 0) and
((FConditionCodes and CC_PARITY_ERROR) <>0)) then
begin
FConditionCodes := FConditionCodes and (not CC_PARITY_ERROR);
rslt := True;
end;
if (((test and CC_SIGN_PLUS) <> 0) and
((FConditionCodes and CC_SIGN_PLUS) <>0)) then
rslt := True;
if (((test and CC_SIGN_ZERO) <> 0) and
((FConditionCodes and CC_SIGN_ZERO) <>0)) then
rslt := True;
if (((test and CC_SIGN_MINUS) <> 0) and
((FConditionCodes and CC_SIGN_MINUS) <>0)) then
rslt := True;
if (rslt) then
FMemory.StoreICC(op.Fldb);
end;
procedure T1005CommCPU.JK;
var
op: T1005CommOperands;
begin
op := FMemory.FetchCommOperands;
if ((op.Flda.Row and FMemory.FetchByte(op.Fldc)) = op.Flda.Row) then
FMemory.StoreICC(op.Fldb);
end;
procedure T1005CommCPU.JL;
var
op: T1005CommOperands;
count: TBcd;
addr: I1005Addr;
begin
op := FMemory.FetchCommOperands;
addr := T1005CommAddr.Create;
addr.SetAddr(1, 32, 2);
count := FMemory.FetchBcd(addr, 2);
count := count - 1;
op.Fldc.Decrement;
FMemory.StoreBcd(op.Fldc, 2, count);
if (count >= 0) then
FMemory.StoreICC(op.Fldb);
end;
procedure T1005CommCPU.JR;
var
op: T1005CommOperands;
begin
op := FMemory.FetchCommOperands;
FMemory.StoreByte(op.Fldc, op.Flda.Col);
op.Fldc.Decrement;
FMemory.StoreByte(op.Fldc, op.Flda.Row);
FMemory.StoreICC(op.Fldb);
end;
procedure T1005CommCPU.JT;
var
op: T1005CommOperands;
begin
op := FMemory.FetchCommOperands;
if ((FConditionCodes and CC_EQUAL) <> 0) then
FMemory.StoreICC(op.Flda)
else if ((FConditionCodes and CC_LESS_THAN) <> 0) then
FMemory.StoreICC(op.Fldb);
end;
procedure T1005CommCPU.ML;
var
op: T1005CommOperands;
op1, op2, op3: I1005Addr;
multiplicand, multiplier, product: TBcd;
x: Integer;
begin
op := FMemory.FetchCommOperands;
op1 := op.Flda.Clone;
op2 := T1005CommAddr.Create;
op3 := op.Fldc.Clone;
op1.Decrement(8);
// op1.SetAddr(op.Flda.SequentialAddr - 8);
op2 := op.Fldb;
op3.Decrement(19);
// op3.SetAddr(op.Fldc.SequentialAddr - 19);
multiplicand := FMemory.FetchBcd(op1, 9);
if (multiplicand < 0) then
multiplicand := multiplicand * -1;
multiplier := FMemory.FetchBcd(op2, 11);
if (multiplier < 0) then
multiplier := multiplier * -1;
product := multiplicand * multiplier;
FMemory.StoreBcd(op3, 20, product);
// Store the product in the "product register" in bank 1, row 1, col 11-30
op.Fldc.Decrement(19);
// op.Fldc.SetAddr(op.Fldc.SequentialAddr - 19);
for x := 11 to 30 do
begin
FMemory.StoreByte(1, 1, x, FMemory.FetchByte(op3));
op3.Increment;
end;
end;
procedure T1005CommCPU.MU;
var
op: T1005CommOperands;
op1, op2, op3: I1005Addr;
multiplicand, multiplier, product: TBcd;
x: Integer;
begin
op := FMemory.FetchCommOperands;
op1 := op.Flda.Clone;
op2 := T1005CommAddr.Create;
op3 := op.Fldc.Clone;
op1.Decrement(3);
// op1.SetAddr(op.Flda.SequentialAddr - 3);
op2 := op.Fldb;
op3.Decrement(9);
// op3.SetAddr(op.Fldc.SequentialAddr - 9);
multiplicand := FMemory.FetchBcd(op1, 4);
if (multiplicand < 0) then
multiplicand := multiplicand * -1;
multiplier := FMemory.FetchBcd(op2, 6);
if (multiplier < 0) then
multiplier := multiplier * -1;
product := multiplicand * multiplier;
FMemory.StoreBcd(op3, 10, product);
// Store the product in the "product register" in bank 1, row 1, col 21-30
op.Fldc.Decrement(9);
// op.Fldc.SetAddr(op.Fldc.SequentialAddr - 9);
for x := 21 to 30 do
begin
FMemory.StoreByte(1, 1, x, FMemory.FetchByte(op.Fldc));
op.Fldc.Increment;
end;
end;
procedure T1005CommCPU.SC;
var
op: T1005CommOperands;
test: Cardinal;
begin
op := FMemory.FetchCommOperands;
test := (op.Fldb.Row shl 6) or op.Fldb.Col;
if ((test and $800) <> 0) then
FConditionCodes := FConditionCodes and (not CC_EVEN_PARITY);
if ((test and $400) <> 0) then
FConditionCodes := FConditionCodes or CC_EVEN_PARITY;
if ((test and $200) <> 0) then
FConditionCodes := FConditionCodes or CC_SENSE2;
if ((test and $100) <> 0) then
FConditionCodes := FConditionCodes or CC_SENSE1;
if ((test and $080) <> 0) then
FConditionCodes := FConditionCodes and (not CC_SENSE2);
if ((test and $040) <> 0) then
FConditionCodes := FConditionCodes and (not CC_SENSE1);
if ((test and $020) <> 0) then
FConditionCodes := FConditionCodes and (not CC_PPT);
if ((test and $010) <> 0) then
FConditionCodes := FConditionCodes or CC_PPT;
if ((test and $008) <> 0) then
FConditionCodes := FConditionCodes and (not CC_SERVO1);
if ((test and $004) <> 0) then
FConditionCodes := FConditionCodes or CC_SERVO1;
if ((test and $002) <> 0) then
begin
FConditionCodes := FConditionCodes or CC_INDICATOR2;
FState := FState + [ucsHalted];
end;
if ((test and $001) <> 0) then
begin
FConditionCodes := FConditionCodes or CC_INDICATOR1;
FState := FState + [ucsHalted];
end;
end;
procedure T1005CommCPU.SetAlt1(Value: Boolean);
begin
inherited;
if (Value) then
FConditionCodes := FConditionCodes or CC_ALTERNATE_HOLD1
else
FConditionCodes := FConditionCodes and (not CC_ALTERNATE_HOLD1);
end;
procedure T1005CommCPU.SetAlt2(Value: Boolean);
begin
inherited;
if (Value) then
FConditionCodes := FConditionCodes or CC_ALTERNATE_HOLD2
else
FConditionCodes := FConditionCodes and (not CC_ALTERNATE_HOLD2);
end;
procedure T1005CommCPU.SM;
var
op: T1005CommOperands;
len, test: Integer;
op1, op2, rslt, zero: TBcd;
begin
op := FMemory.FetchCommOperands;
op.Fldc.AdjustBankAsc(op.Fldb);
Assert(op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr, 'SM OP2 LSL < MSL');
len := op.Fldc.SequentialAddr - op.Fldb.SequentialAddr + 1;
op.Flda.Decrement(len - 1);
// op.Flda.SetAddr(op.Flda.SequentialAddr - len + 1); // Adjust to start of FldA
op1 := FMemory.FetchBcd(op.Flda, len);
op1.SignSpecialPlaces := op1.SignSpecialPlaces and $7f;
op2 := FMemory.FetchBcd(op.Fldb, len);
op2.SignSpecialPlaces := op2.SignSpecialPlaces and $7f;
zero := 0;
rslt := op2 - op1;
test := BcdCompare(rslt, zero);
FConditionCodes := FConditionCodes and (not CC_SIGNS); // Clear previous sign bits
if (test < 0) then
FConditionCodes := FConditionCodes or CC_SIGN_MINUS
else if (test > 0) then
FConditionCodes := FConditionCodes or CC_SIGN_PLUS
else
FConditionCodes := FConditionCodes or CC_SIGN_ZERO;
if (BcdPrecision(rslt) > len) then
FConditionCodes := FConditionCodes or CC_ARITHMETIC_OVERFLOW;
FMemory.StoreBcd(op.Fldb, len, rslt);
end;
procedure T1005CommCPU.Start;
begin
FState := FState - [ucsHalted, ucsError];
// Clear halt codes
FConditionCodes := FConditionCodes and (not (CC_INDICATOR1 or CC_INDICATOR2));
try
FetchInstruction;
repeat
ExecuteInstruction;
FetchInstruction;
until ((FState * [ucsSingleStep, ucsHalted, ucsError]) <> []);
FState := FState + [ucsHalted];
except
on E: Exception do
begin
if (Assigned(FOnError)) then
FOnError(Self, E);
if (Assigned(FOnDebug)) then
FOnDebug(Self, E);
FState := FState + [ucsError];
if (E is EAssertionFailed) then
Application.ShowException(E);
end;
end;
end;
procedure T1005CommCPU.Stop;
begin
FState := FState + [ucsHalted];
end;
procedure T1005CommCPU.SU;
var
op: T1005CommOperands;
len, test: Integer;
op1, op2, rslt, zero: TBcd;
begin
op := FMemory.FetchCommOperands;
op.Fldc.AdjustBankAsc(op.Fldb);
Assert(op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr, 'SU OP2 LSL < MSL');
len := op.Fldc.SequentialAddr - op.Fldb.SequentialAddr + 1;
op.Flda.Decrement(len - 1);
// op.Flda.SetAddr(op.Flda.SequentialAddr - len + 1); // Adjust to start of FldA
op1 := FMemory.FetchBcd(op.Flda, len);
op2 := FMemory.FetchBcd(op.Fldb, len);
zero := 0;
rslt := op2 - op1;
test := BcdCompare(rslt, zero);
FConditionCodes := FConditionCodes and (not CC_SIGNS); // Clear previous sign bits
if (test < 0) then
FConditionCodes := FConditionCodes or CC_SIGN_MINUS
else if (test > 0) then
FConditionCodes := FConditionCodes or CC_SIGN_PLUS
else
FConditionCodes := FConditionCodes or CC_SIGN_ZERO;
if (BcdPrecision(rslt) > len) then
FConditionCodes := FConditionCodes or CC_ARITHMETIC_OVERFLOW;
FMemory.StoreBcd(op.Fldb, len, rslt);
end;
procedure T1005CommCPU.TA;
var
op: T1005CommOperands;
begin
op := FMemory.FetchCommOperands;
op.Fldc.AdjustBankAsc(op.Fldb);
Assert(op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr, 'TA OP2 LSL < MSL');
while (not op.Fldc.Matches(op.Fldb)) do
begin
FMemory.StoreByte(op.Fldc, FMemory.FetchByte(op.Flda));
Op.Flda.Decrement;
op.Fldc.Decrement;
end;
FMemory.StoreByte(op.Fldc, FMemory.FetchByte(op.Flda));
end;
procedure T1005CommCPU.TC;
var
op: T1005CommOperands;
begin
op := FMemory.FetchCommOperands;
op.Fldc.AdjustBankAsc(op.Fldb);
Assert(op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr, 'TC OP2 LSL < MSL');
while (not op.Fldc.Matches(op.Fldb)) do
begin
FMemory.StoreByte(op.Fldc, FMemory.FetchByte(op.Flda));
FMemory.StoreByte(op.Flda, X3_SPACE);
Op.Flda.Decrement;
op.Fldc.Decrement;
end;
FMemory.StoreByte(op.Fldc, FMemory.FetchByte(op.Flda));
FMemory.StoreByte(op.Flda, X3_SPACE);
end;
procedure T1005CommCPU.TD;
var
op: T1005CommOperands;
begin
op := FMemory.FetchCommOperands;
while (not op.Fldb.Matches(op.Fldc)) do
begin
FMemory.StoreByte(op.Fldb, FMemory.FetchByte(op.Flda));
Op.Flda.Increment;
op.Fldb.Increment;
end;
FMemory.StoreByte(op.Fldb, FMemory.FetchByte(op.Flda));
end;
procedure T1005CommCPU.TK;
var
op: T1005CommOperands;
begin
op := FMemory.FetchCommOperands;
op.Fldc.AdjustBankAsc(op.Fldb);
Assert(op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr, 'TK OP2 LSL < MSL');
FMemory.StoreByte(op.Fldc, op.Flda.Col);
op.Fldc.Decrement;
if (op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr) then
begin
FMemory.StoreByte(op.Fldc, op.Flda.Row);
while (not op.Fldc.Matches(op.Fldb)) do
begin
op.Fldc.Decrement;
FMemory.StoreByte(op.Fldc, X3_SPACE);
end;
end;
end;
procedure T1005CommCPU.TN;
var
op: T1005CommOperands;
begin
op := FMemory.FetchCommOperands;
op.Fldc.AdjustBankAsc(op.Fldb);
Assert(op.Fldc.SequentialAddr >= op.Fldb.SequentialAddr, 'TN OP2 LSL < MSL');
while (not op.Fldc.Matches(op.Fldb)) do
begin
FMemory.StoreByte(op.Fldc, FMemory.FetchByte(op.Flda) and $0f);
Op.Flda.Decrement;
op.Fldc.Decrement;
end;
FMemory.StoreByte(op.Fldc, FMemory.FetchByte(op.Flda) and $0f);
end;
procedure T1005CommCPU.TR;
var
op: T1005CommOperands;
b, row, col: Byte;
begin
op := FMemory.FetchCommOperands;
while (not op.Fldb.Matches(op.Fldc)) do
begin
// Determine the address of the translated value using the 1005's weird translate table
// addressing scheme. Translate table must be in bank 4.
b := FMemory.FetchByte(op.Fldb);
if (b = $1f) then
begin
row := 28;
col := 30;
end else if (b = $3f) then
begin
row := 28;
col := 31;
end else if ((b and $20) = 0) then
begin
row := 29;
col := 1;
end else
begin
row := 30;
col := 1;
end;
op.Flda.SetAddr(4, row, col);
if (col = 1) then
op.Flda.SetAddr(op.Flda.Row, b or $20);
// Translate 1 byte
b := FMemory.FetchByte(op.Flda);
FMemory.StoreByte(op.Fldb, b);
op.Fldb.Increment;
end;
end;
procedure T1005CommCPU.TX;
var
op: T1005CommOperands;
idx: Integer;
begin
op := FMemory.FetchCommOperands;
idx := 31;
while ((idx > 0) and (op.Flda.SequentialAddr > op.Fldb.SequentialAddr)) do
begin
FMemory.StoreCommX(idx, FMemory.FetchByte(op.Flda));
op.Flda.Decrement;
Dec(idx);
end;
FMemory.StoreCommX(idx, FMemory.FetchByte(op.Flda));
Dec(idx);
while (idx > 0) do
begin
FMemory.StoreCommX(idx, X3_SPACE);
Dec(idx);
end;
end;
end.
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