mirror of
https://github.com/erkyrath/infocom-zcode-terps.git
synced 2026-02-09 17:51:46 +00:00
174 lines
7.5 KiB
Plaintext
174 lines
7.5 KiB
Plaintext
TITLE "Apple ][ YZIP (c)Infocom","ZERO PAGE VARIABLES"
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PAGE
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SCRCX EQU 0 ; CURSOR HORIZONTAL
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SCRCY EQU SCRCX+1 ; CURSOR VERTICAL
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SCRBTM EQU SCRCY+1 ; first line outside current window
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MAXLINES EQU SCRBTM+1 ; maximum number of lines in window
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LEFTMRG EQU MAXLINES+1 ; left edge + left margin in current window
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WINDOW EQU LEFTMRG+1 ; (WORD) address of current window structure
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WRPFLG EQU WINDOW+2 ; wrapping flag
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SCRLFLG EQU WRPFLG+1 ; scrolling flag
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BUFFLG EQU SCRLFLG+1 ; buffering flag
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CLSLEFT EQU BUFFLG+1 ; screen limits for CLS code
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CLSTOP EQU CLSLEFT+1 ; top of screen
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CLSWIDTH EQU CLSTOP+1 ; # of columns
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CLSHEIGHT EQU CLSWIDTH+1 ; # of lines
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;
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; some variables for all the screen positioning code
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;
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NY_DATA EQU CLSHEIGHT+1 ; place for GET/PUT_NYBBLE to use
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CH_OFFSET EQU NY_DATA+1 ; offset into char data table
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DATALOOP EQU CH_OFFSET+1 ; loop counter for byte works
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BITOFF EQU DATALOOP+1 ; bit offset into screen byte
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CH_DATA EQU BITOFF+1 ; actual char data being worked on
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SCR_DATA EQU CH_DATA+1 ; screen byte being worked on
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SH_LOOP EQU SCR_DATA+1 ; loop counter for bit shifting
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SCROLLY EQU SH_LOOP+1 ; save spot for y pos when scrolling
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MID EQU SCROLLY+1 ; (BYTE) Machine ID
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CHRMAX EQU MID+1 ; (BYTE) # CHARS CAN INPUT FROM KEYBOARD
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SCLLINES EQU CHRMAX+1 ; (BYTE) how many lines to scroll
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FMTTBL EQU SCLLINES+1 ; (BYTE) flag to show formatted table output
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STMASK EQU FMTTBL+1 ; (BYTE) Mask to use on first byte of CLS
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ENDMASK EQU STMASK+1 ; (BYTE) Mask to use on last byte of CLS
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CHPTR EQU ENDMASK+1 ; (WORD) pointer to char data
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SCOFF EQU CHPTR+1 ;(BYTE) Offset used by scroll
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DSEGS EQU SCOFF+1 ; (WORD) Pointer to current disk's segments
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LASTWV EQU DSEGS+2 ; last of the WINDOW variables
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ZEROPG EQU $50 ; FIRST FREE Z-PAGE LOCATION
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;
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; these are first, cuz ZBOOT inits them so we don't want to clear them
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; at ZBEGIN warm start
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;
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GLOBAL EQU ZEROPG ; (Relative Addr.) GLOBAL VARIABLE POINTER
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VOCAB EQU GLOBAL+2 ; (ADDRESS) Vocab table pointer
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FWORDS EQU VOCAB+3 ; (ADDRESS) F-WORDS TABLE POINTER
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MOUSEF EQU FWORDS+3 ; (BYTE) ==-1/1 if we have mouse/joystick
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INFODOS EQU MOUSEF+1 ; (WORD) if <>0, then pointer to D2SEG
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FUNOFF EQU INFODOS+2 ; (ADDRESS) Function Offset (ZFOFF*8)
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FOFFH EQU FUNOFF ; (BYTE) Hi part
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FOFFM EQU FUNOFF+1 ; (BYTE) Middle part
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FOFFL EQU FUNOFF+2 ; (BYTE) Lo part
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STROFF EQU FUNOFF+3 ; (ADDRESS) String Offset (ZSOFF*8)
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SOFFH EQU STROFF ; (BYTE) Hi part
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SOFFM EQU STROFF+1 ; (BYTE) Middle part
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SOFFL EQU STROFF+2 ; (BYTE) Lo part
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;
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; Beginning of warm start zeroing
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;
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OPCODE EQU STROFF+3 ; (BYTE) CURRENT OPCODE
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NARGS EQU OPCODE+1 ; (BYTE) # ARGUMENTS
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ARG1 EQU OPCODE+2 ; (WORD) ARGUMENT #1
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ARG2 EQU OPCODE+4 ; (WORD) ARGUMENT #2
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ARG3 EQU OPCODE+6 ; (WORD) ARGUMENT #3
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ARG4 EQU OPCODE+8 ; (WORD) ARGUMENT #4
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ARG5 EQU OPCODE+10 ; (WORD)
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ARG6 EQU OPCODE+12 ; (WORD)
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ARG7 EQU OPCODE+14 ; (WORD)
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ARG8 EQU OPCODE+16 ; (WORD)
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ABYTE EQU OPCODE+18 ; (BYTE) X-OP ARGUMENT BYTE
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BBYTE EQU OPCODE+19 ; (BYTE) XCALL ARG BYTE (EZIP)
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ADEX EQU OPCODE+20 ; (BYTE) X-OP ARGUMENT INDEX
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VALUE EQU OPCODE+21 ; (WORD) VALUE RETURN REGISTER
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I EQU VALUE+2 ; (WORD) GEN-PURPOSE REGISTER #1
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J EQU VALUE+4 ; (WORD) GEN-PURPOSE REGISTER #2
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K EQU VALUE+6 ; (WORD) GEN-PURPOSE REGISTER #3
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L EQU VALUE+8 ; (WORD) GEN-PURPOSE REGISTER #4
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ZPC EQU VALUE+10 ; (3 BYTES) ZIP PROGRAM COUNTER
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ZPCL EQU ZPC ; (BYTE) <8 BITS OF [ZPC]
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ZPCM EQU ZPC+1 ; (BYTE) MIDDLE 8 BITS OF [ZPC]
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ZPCH EQU ZPC+2 ; (BYTE) >BIT OF [ZPC]
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ZPCPNT EQU ZPC+3 ; (3 BYTES) ABS POINTER TO CURRENT Z-PAGE
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ZPNTL EQU ZPCPNT ; FIRST 2 BYTES = SAME AS FOR ZIP (EZIP)
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ZPNTH EQU ZPCPNT+1 ; (BYTE)
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ZPCBNK EQU ZPCPNT+2 ; (BYTE) INDICATES AUXILIARY MEMORY
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MPC EQU ZPCPNT+3 ; (3 BYTES) MEMORY PROGRAM COUNTER
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MPCL EQU MPC ; (BYTE) <8 BITS OF [MPC]
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MPCM EQU MPC+1 ; (BYTE) MIDDLE 8 BITS OF [MPC]
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MPCH EQU MPC+2 ; (BYTE) >BIT OF [MPC]
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MPCPNT EQU MPC+3 ; (3 BYTES) ABS POINTER TO CURRENT M-PAGE
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MPNTL EQU MPCPNT ; FIRST 2 BYTES = SAME AS FOR ZIP (EZIP)
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MPNTH EQU MPCPNT+1 ; (BYTE)
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MPCBNK EQU MPCPNT+2 ; (BYTE) INDICATES AUXILIARY MEMORY
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FPC EQU MPCBNK+1 ; (3 Bytes) Fetch pointer
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FPCL EQU FPC ; (BYTE) Low part
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FPCH EQU FPCL+1 ; (BYTE) High Part
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FPCBNK EQU FPCH+1 ; (BYTE) Bank part (0-Main, 1-Aux)
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SPC EQU FPCBNK+1 ; (3 Bytes) Fetch pointer
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SPCL EQU SPC ; (BYTE) Low part
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SPCH EQU SPCL+1 ; (BYTE) High Part
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SPCBNK EQU SPCH+1 ; (BYTE) Bank part (0-Main, 1-Aux)
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; Z-STRING MANIPULATION VARIABLES
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LINLEN EQU SPCBNK+1 ; (BYTE) LENGTH OF CURRENT LINE
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SOURCE EQU LINLEN+1 ; (BYTE) counter for read
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WRDLEN EQU SOURCE+1 ; (BYTE) LENGTH OF CURRENT WORD
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ESIZE EQU WRDLEN+1 ; (BYTE) SIZE OF VOCAB TABLE ENTRIES
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PSET EQU ESIZE+1 ; (BYTE) PERMANENT CHARSET
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TSET EQU PSET+1 ; (BYTE) TEMPORARY CHARSET
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ZCHAR EQU TSET+1 ; (BYTE) CURRENT Z-CHAR
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OFFSET EQU ZCHAR+1 ; (BYTE) F-WORD TABLE OFFSET
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ZFLAG EQU OFFSET+1 ; (BYTE) Z-WORD ACCESS FLAG
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ZWORD EQU ZFLAG+1 ; (WORD) CURRENT Z-WORD
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CONCNT EQU ZWORD+2 ; (BYTE) Z-STRING SOURCE COUNTER
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CONIN EQU CONCNT+1 ; (BYTE) CONVERSION SOURCE INDEX
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CONOUT EQU CONIN+1 ; (BYTE) CONVERSION DEST INDEX
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DIRTBL EQU CONOUT+1 ; (WORD) CONTAINS TBLE TO STORE CHARS TO
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XSIZE EQU DIRTBL+2 ; (WORD) SCREEN WIDTH FOR TESTS
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RAND1 EQU XSIZE+2 ; (BYTE)
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RAND2 EQU XSIZE+3 ; (BYTE) RANDOM #
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CURWIN EQU XSIZE+4 ; (BYTE) WHICH WINDOW TO WRITE IN
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LENGTH EQU CURWIN+1 ; (WORD) CHAR POSITION ON THE SCREEN
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CHRCNT EQU LENGTH+2 ; (BYTE) CHAR POSITION IN [LBUFF]
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SCRIPT EQU CHRCNT+1 ; (BYTE) SCRIPT ENABLE FLAG
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LINCNT EQU SCRIPT+1 ; (BYTE) LINE COUNTER
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IOCHAR EQU LINCNT+1 ; (BYTE) CHARACTER BUFFER
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COLORP EQU IOCHAR+1 ; (WORD) Pointer to current background color
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ZSP EQU COLORP+2 ; (WORD) Z Stack
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SCREENF EQU ZSP+2 ; (BYTE) DIROUT FLAG FOR SCREEN OUTPUT
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TABLEF EQU SCREENF+1 ; (BYTE) DIROUT FLAG FOR TABLE OUTPUT
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VOCEND EQU TABLEF+1 ; (3 BYTES) HOLDS MPC IN VOCAB SEARCH
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DBUFF EQU VOCEND+3 ; (WORD) RAM PG TO ACCESS (LSB = 0)
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DSKBNK EQU DBUFF+2 ; (BYTE) MAIN/AUX bank
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ALLFLG EQU DSKBNK+1 ; (BYTE) IF =1 ALL FCN KEYS (>127) ARE TCHARS
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UNDFLG EQU ALLFLG+1 ; (BYTE) Underlining flag
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INVFLG EQU UNDFLG+1 ; (BYTE) Inverse flag
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MEMPAGE EQU INVFLG+1 ; (BYTE) Save spot for XPAGING stuff
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CPY_COUNT EQU MEMPAGE+1 ; (BYTE) Number of bytes for copy line
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TBLHEIGHT EQU CPY_COUNT+1 ;(BYTE) Number of lines in printing table
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TBLWIDTH EQU TBLHEIGHT+1 ;(BYTE) Number of bytes per line
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TBLCNT EQU TBLWIDTH+1 ;(BYTE) Counter for table printing
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FONTFLG EQU TBLCNT+1 ;(BYTE) Which font (!=0 is width)
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TBLPUR EQU FONTFLG+1 ;(BYTE) first pure table page
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FUNPRE EQU TBLPUR+1 ;(BYTE) first preloaded function page
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FUNPUR EQU FUNPRE+1 ;(BYTE) first pure function page
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FUNPGE EQU FUNPUR+1 ;(BYTE) -number to get function preload page
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DELAY_COUNTER EQU FUNPGE+1 ;(BYTE) counter for delay loop
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;
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; some char-to-screen variables
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;
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CHAR_D1 EQU DELAY_COUNTER+1 ; (BYTE) character data, part 1
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CHAR_D2 EQU CHAR_D1+1 ; (BYTE) char data, part 2
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CW EQU CHAR_D2+1 ; (BYTE) width of the character
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CLKCTR EQU CW+1 ; (BYTE) counter for mouse clicking
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MSX EQU CLKCTR+1 ; (BYTE) mouse cursor X
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MSY EQU MSX+1 ; (BYTE) mouse cursor Y
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CURRENT EQU MSY+1 ; (BYTE) current paging bufer
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MSTBL EQU CURRENT+1 ; (ADDRESS) pointer to extension table
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LASTZP EQU MSTBL+3 ; just checking
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;
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; these routines are in non-swapped memory
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;
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ZERO_FB EQU LASTZP ; put fetch byte routine in at end of ZP
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ZERO_ZF EQU ZERO_FB+11 ; and ZPCPNT fetch after that
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ZERO_MF EQU ZERO_ZF+9 ; and MPCPNT fetch after that
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SAVE_DATA EQU ZERO_MF+9 ; copy data from DBUFF to IOBUFF routine
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;
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; and just to check the end
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;
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ZEE_END EQU SAVE_DATA+17 ; should be == 100
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END
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