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ISYS80XX, IMDS-225: Extended device functions and debug cleanup

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a)  Added sim_debug statements, formatted console messages.
b) Removed old debugging statements and redundant byte/word mask operations.
c) Added more device commands.
d) Added zx-200a and changed nulldev to return 0 vice 0xff.
e) Added commands and corrected RTYPE and RBYTE behavior so ISIS-II would boot.
f) Corrected device calls in SBC_reset, corrected get_mbyte and put_mbyte to
   match control bits from ipc_cont.c.
This commit is contained in:
Bill Beech
2017-01-11 16:08:14 -07:00
parent 9851a36dd8
commit 38668a25f1
21 changed files with 381 additions and 235 deletions
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19
Intel-Systems/common/i8088.c
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@@ -205,8 +205,8 @@ BORROW CHAIN CALCULATION.
#define UNIT_V_OPSTOP (UNIT_V_UF) /* Stop on Invalid OP? */
#define UNIT_OPSTOP (1 << UNIT_V_OPSTOP)
#define UNIT_V_CHIP (UNIT_V_UF+1) /* 8088 or 8086 */
#define UNIT_CHIP (1 << UNIT_V_CHIP)
#define UNIT_V_8088 (UNIT_V_UF+1) /* 8088 or 8086 */
#define UNIT_8088 (1 << UNIT_V_8088)
/* Flag values to set proper positions in PSW */
#define CF 0x0001
@@ -429,8 +429,8 @@ REG i8088_reg[] = {
};
MTAB i8088_mod[] = {
{ UNIT_CHIP, UNIT_CHIP, "8086", "8086", NULL },
{ UNIT_CHIP, 0, "8088", "8088", NULL },
{ UNIT_8088, UNIT_8088, "8086", "8086", NULL },
{ UNIT_8088, 0, "8088", "8088", NULL },
{ UNIT_OPSTOP, UNIT_OPSTOP, "ITRAP", "ITRAP", NULL },
{ UNIT_OPSTOP, 0, "NOITRAP", "NOITRAP", NULL },
{ 0 }
@@ -626,7 +626,7 @@ int32 sim_instr (void)
case 0x00: /* ADD byte - REG = REG + (EA) */
MRR = fetch_byte(1);
get_mrr_dec(MRR, &MOD, &REG, &RM);
if (MOD != 0x3) { /* based, indexed, or based indexed addressing */ /* based, indexed, or based indexed addressing */
if (MOD != 0x3) { /* based, indexed, or based indexed addressing */
EA = get_ea(MRR); /* get effective address */
VAL = add_byte(get_rbyte(REG), get_smbyte(seg_reg, EA)); /* do operation */
put_rbyte(REG, VAL); /* store result */
@@ -1500,7 +1500,7 @@ int32 sim_instr (void)
VAL = add_byte(get_smbyte(seg_reg, EA), DATA); /* ADD mem8, immed8 */
break;
case 1:
VAL = or_byte(get_smbyte(seg_reg, EA), DATA); /* OR mem8, immed8 */
VAL = or_byte(get_smbyte(seg_reg, EA), DATA); /* OR mem8, immed8 */
break;
case 2:
VAL = adc_byte(get_smbyte(seg_reg, EA), DATA); /* ADC mem8, immed8 */
@@ -1996,7 +1996,7 @@ int32 sim_instr (void)
break;
case 0x9A: /* CALL FAR proc */
OFF = fetch_word(); /* do operation */
OFF = fetch_word(); /* do operation */
SEG = fetch_word();
push_word(CS);
CS = SEG;
@@ -3133,8 +3133,7 @@ int32 sim_instr (void)
}
}
/* Simulation halted */
/* Simulation halted */
saved_PC = IP;
return reason;
}
@@ -3439,7 +3438,7 @@ void get_mrr_dec(uint32 mrr, uint32 *mod, uint32 *reg, uint32 *rm)
}
/*
Most of the primitive algorythms were pulled from the GDE Dos/IP Emulator by Jim Hudgens
Most of the primitive algorithms were pulled from the GDE Dos/IP Emulator by Jim Hudgens
*/
/* aad primitive */