1 /*****************************************************************************/
5 /* Internal include file, do not use directly */
8 /* This software is provided 'as-is', without any expressed or implied */
9 /* warranty. In no event will the authors be held liable for any damages */
10 /* arising from the use of this software. */
12 /* Permission is granted to anyone to use this software for any purpose, */
13 /* including commercial applications, and to alter it and redistribute it */
14 /* freely, subject to the following restrictions: */
16 /* 1. The origin of this software must not be misrepresented; you must not */
17 /* claim that you wrote the original software. If you use this software */
18 /* in a product, an acknowledgment in the product documentation would be */
19 /* appreciated but is not required. */
20 /* 2. Altered source versions must be plainly marked as such, and must not */
21 /* be misrepresented as being the original software. */
22 /* 3. This notice may not be removed or altered from any source */
25 /*****************************************************************************/
31 /* IOCB Command Codes */
33 #define IOCB_OPEN 0x03 /* open */
34 #define IOCB_GETREC 0x05 /* get record */
35 #define IOCB_GETCHR 0x07 /* get character(s) */
36 #define IOCB_PUTREC 0x09 /* put record */
37 #define IOCB_PUTCHR 0x0B /* put character(s) */
38 #define IOCB_CLOSE 0x0C /* close */
39 #define IOCB_STATIS 0x0D /* status */
40 #define IOCB_SPECIL 0x0E /* special */
41 #define IOCB_DRAWLN 0x11 /* draw line */
42 #define IOCB_FILLIN 0x12 /* draw line with right fill */
43 #define IOCB_RENAME 0x20 /* rename disk file */
44 #define IOCB_DELETE 0x21 /* delete disk file */
45 #define IOCB_LOCKFL 0x23 /* lock file (set to read-only) */
46 #define IOCB_UNLOCK 0x24 /* unlock file */
47 #define IOCB_POINT 0x25 /* point sector */
48 #define IOCB_NOTE 0x26 /* note sector */
49 #define IOCB_GETFL 0x27 /* get file length */
50 #define IOCB_CHDIR_MYDOS 0x29 /* change directory (MyDOS) */
51 #define IOCB_MKDIR 0x2A /* make directory (MyDOS/SpartaDOS) */
52 #define IOCB_RMDIR 0x2B /* remove directory (SpartaDOS) */
53 #define IOCB_CHDIR_SPDOS 0x2C /* change directory (SpartaDOS) */
54 #define IOCB_GETCWD 0x30 /* get current directory (MyDOS/SpartaDOS) */
55 #define IOCB_FORMAT 0xFE /* format */
58 /* I/O control block */
61 unsigned char handler; /* handler index number (0xff free) */
62 unsigned char drive; /* device number (drive) */
63 unsigned char command; /* command */
64 unsigned char status; /* status of last operation */
65 void* buffer; /* pointer to buffer */
66 void* put_byte; /* pointer to device's PUT BYTE routine */
67 unsigned int buflen; /* length of buffer */
68 unsigned char aux1; /* 1st auxiliary byte */
69 unsigned char aux2; /* 2nd auxiliary byte */
70 unsigned char aux3; /* 3rd auxiliary byte */
71 unsigned char aux4; /* 4th auxiliary byte */
72 unsigned char aux5; /* 5th auxiliary byte */
73 unsigned char spare; /* spare byte */
77 /* DOS 2.x zeropage variables */
80 unsigned char* zbufp; /* points to user filename */
81 unsigned char* zdrva; /* points to serveral buffers (mostly VTOC) */
82 unsigned char* zsba; /* points to sector buffer */
83 unsigned char errno; /* number of occured error */
87 /* A single device handler formed by it's routines */
90 void *open; /* address of OPEN routine -1 */
91 void *close; /* address of CLOSE routine -1 */
92 void *get; /* address of GET BYTE routine -1 */
93 void *put; /* address of PUT BYTE routine -1 */
94 void *status; /* address of GET STATUS routine -1 */
95 void *special; /* address od SPECIAL routine -1 */
96 void (*init)(void); /* init routine (JMP INIT) */
97 void *reserved; /* unused */
101 /* List of device handlers, as managed in HATABS */
104 unsigned char id; /* ATASCII code of handler e.g. 'C','D','E','K','P','S','R' */
105 DEVHDL* devhdl; /* Pointer to routines of device */
108 /* Floating point register */
113 unsigned char frm[5]; /* 5-byte register mantissa */
115 unsigned char fr[6]; /* 6 bytes for single register */
119 enum { /* enum for access of floating point registers */
120 R0 = 0, /* (to use as index) */
127 /* Define a structure with atari os register offsets */
134 unsigned char* linzbs; // = $00/$01 LINBUG RAM (WILL BE REPLACED BY MONITOR RAM)
136 unsigned char linflg; // = $00 LNBUG FLAG (0 = NOT LNBUG)
137 unsigned char ngflag; // = $01 MEMORY STATUS (0 = FAILURE)
139 unsigned char* casini; // = $02/$03 CASSETTE INIT LOCATION
140 unsigned char* ramlo; // = $04/$05 RAM POINTER FOR MEMORY TEST
143 unsigned char tramsz; // = $06 FLAG FOR LEFT CARTRIDGE
144 unsigned char tstdat; // = $07 FLAG FOR RIGHT CARTRIDGE
146 unsigned char trnsmz; // = $06 TEMPORARY REGISTER FOR RAM SIZE
147 unsigned char tstdat; // = $07 UNUSED (NOT TOUCHED DURING RESET/COLD START)
150 // Cleared upon Coldstart only
152 unsigned char warmst; // = $08 WARM START FLAG
153 unsigned char bootq; // = $09 SUCCESSFUL BOOT FLAG
154 void (*dosvec)(void); // = $0A/$0B DISK SOFTWARE START VECTOR
155 void (*dosini)(void); // = $0C/$0D DISK SOFTWARE INIT ADDRESS
156 unsigned char* appmhi; // = $0E/$0F APPLICATIONS MEMORY HI LIMIT
158 // Cleared upon Coldstart or Warmstart
160 unsigned char pokmsk; // = $10 SYSTEM MASK FOR POKEY IRQ ENABLE
161 unsigned char brkkey; // = $11 BREAK KEY FLAG
162 unsigned char rtclok[3]; // = $12-$14 REAL TIME CLOCK (IN 16 MSEC UNITS)
163 unsigned char* bufadr; // = $15/$16 INDIRECT BUFFER ADDRESS REGISTER
164 unsigned char iccomt; // = $17 COMMAND FOR VECTOR
165 unsigned char* dskfms; // = $18/$19 DISK FILE MANAGER POINTER
166 unsigned char* dskutl; // = $1A/$1B DISK UTILITIES POINTER
168 unsigned char ptimot; // = $1C PRINTER TIME OUT REGISTER
169 unsigned char pbpnt; // = $1D PRINT BUFFER POINTER
170 unsigned char pbufsz; // = $1E PRINT BUFFER SIZE
171 unsigned char ptemp; // = $1F TEMPORARY REGISTER
173 unsigned char abufpt[4]; // = $1C-$1F ACMI BUFFER POINTER AREA
175 IOCB ziocb; // = $20-$2F ZERO PAGE I/O CONTROL BLOCK
177 unsigned char status; // = $30 INTERNAL STATUS STORAGE
178 unsigned char chksum; // = $31 CHECKSUM (SINGLE BYTE SUM WITH CARRY)
179 unsigned char* bufr; // = $32/$33 POINTER TO DATA BUFFER
180 unsigned char* bfen; // = $34/$35 NEXT BYTE PAST END OF THE DATA BUFFER LO
182 unsigned char cretry; // = $36 NUMBER OF COMMAND FRAME RETRIES
183 unsigned char dretry; // = $37 NUMBER OF DEVICE RETRIES
185 unsigned int ltemp; // = $36/$37 LOADER TEMPORARY
187 unsigned char bufrfl; // = $38 DATA BUFFER FULL FLAG
188 unsigned char recvdn; // = $39 RECEIVE DONE FLAG
189 unsigned char xmtdon; // = $3A TRANSMISSION DONE FLAG
190 unsigned char chksnt; // = $3B CHECKSUM SENT FLAG
191 unsigned char nocksm; // = $3C NO CHECKSUM FOLLOWS DATA FLAG
192 unsigned char bptr; // = $3D CASSETTE BUFFER POINTER
193 unsigned char ftype; // = $3E CASSETTE IRG TYPE
194 unsigned char feof; // = $3F CASSETTE EOF FLAG (0 // = QUIET)
196 unsigned char freq; // = $40 CASSETTE BEEP COUNTER
197 unsigned char soundr; // = $41 NOISY I/0 FLAG. (ZERO IS QUIET)
198 unsigned char critic; // = $42 DEFINES CRITICAL SECTION (CRITICAL IF NON-Z)
199 DOS2X fmszpg; // = $43-$49 DISK FILE MANAGER SYSTEM ZERO PAGE
201 unsigned char ckey; // = $4A FLAG SET WHEN GAME START PRESSED
202 unsigned char cassbt; // = $4B CASSETTE BOOT FLAG
204 void* zchain; // = $4A/$4B HANDLER LINKAGE CHAIN POINTER
206 unsigned char dstat; // = $4C DISPLAY STATUS
207 unsigned char atract; // = $4D ATRACT FLAG
208 unsigned char drkmsk; // = $4E DARK ATRACT MASK
209 unsigned char colrsh; // = $4F ATRACT COLOR SHIFTER (EOR'ED WITH PLAYFIELD
211 unsigned char tmpchr; // = $50 TEMPORARY CHARACTER
212 unsigned char hold1; // = $51 TEMPORARY
213 unsigned char lmargn; // = $52 LEFT MARGIN (NORMALLY 2, CC65 C STARTUP CODE SETS IT TO 0)
214 unsigned char rmargn; // = $53 RIGHT MARGIN (NORMALLY 39 IF NO XEP80 IS USED)
215 unsigned char rowcrs; // = $54 1CURSOR ROW
216 unsigned int colcrs; // = $55/$56 CURSOR COLUMN
217 unsigned char dindex; // = $57 DISPLAY MODE
218 unsigned char* savmsc; // = $58/$59 SAVED MEMORY SCAN COUNTER
219 unsigned char oldrow; // = $5A PRIOR ROW
220 unsigned int oldcol; // = $5B/$5C PRIOR COLUMN
221 unsigned char oldchr; // = $5D DATA UNDER CURSOR
222 unsigned char* oldadr; // = $5E/$5F SAVED CURSOR MEMORY ADDRESS
225 unsigned char newrow; // = $60 POINT DRAW GOES TO
226 unsigned int newcol; // = $61/$62 COLUMN DRAW GOES TO
228 unsigned char* fkdef; // = $60/$61 FUNCTION KEY DEFINITION TABLE
229 unsigned char palnts; // = $62 PAL/NTSC INDICATOR (0 // = NTSC)
231 unsigned char logcol; // = $63 POINTS AT COLUMN IN LOGICAL LINE
232 unsigned char* adress; // = $64/$65 TEMPORARY ADDRESS
233 unsigned int mlttmp; // = $66/$67 TEMPORARY / FIRST BYTE IS USED IN OPEN AS TEMP
234 unsigned int savadr; // = $68/$69 SAVED ADDRESS
235 unsigned char ramtop; // = $6A RAM SIZE DEFINED BY POWER ON LOGIC
236 unsigned char bufcnt; // = $6B BUFFER COUNT
237 unsigned char* bufstr; // = $6C/$6D EDITOR GETCH POINTER
238 unsigned char bitmsk; // = $6E BIT MASK
239 unsigned char shfamt; // = $6F SHIFT AMOUNT FOR PIXEL JUSTIFUCATION
241 unsigned int rowac; // = $70/$71 DRAW WORKING ROW
242 unsigned int colac; // = $72/$73 DRAW WORKING COLUMN
243 unsigned char* endpt; // = $74/$75 END POINT
244 unsigned char deltar; // = $76 ROW DIFFERENCE
245 unsigned int deltac; // = $77/$78 COLUMN DIFFERENCE
247 unsigned char rowinc; // = $79 ROWINC
248 unsigned char colinc; // = $7A COLINC
250 unsigned char* keydef; // = $79/$7A 2-BYTE KEY DEFINITION TABLE ADDRESS
252 unsigned char swpflg; // = $7B NON-0 1F TXT AND REGULAR RAM IS SWAPPED
253 unsigned char holdch; // = $7C CH IS MOVED HERE IN KGETCH BEFORE CNTL & SH
254 unsigned char insdat; // = $7D 1-BYTE TEMPORARY
255 unsigned int countr; // = $7E/$7F 2-BYTE DRAW ITERATION COUNT
257 unsigned char _free_1[0xD4-0x7F-1]; // USER SPACE
259 // Floating Point Package Page Zero Address Equates
260 FPREG fpreg[4]; // = $D4-$EB 4 REGSITERS, ACCCESS LIKE "fpreg[R0].fr"
261 unsigned char frx; // = $EC 1-BYTE TEMPORARY
262 unsigned char eexp; // = $ED VALUE OF EXP
264 unsigned char frsign; // = $EE ##REV2## 1-BYTE FLOATING POINT SIGN
265 unsigned char plycnt; // = $EF ##REV2## 1-BYTE POLYNOMIAL DEGREE
266 unsigned char sgnflg; // = $F0 ##REV2## 1-BYTE SIGN FLAG
267 unsigned char xfmflg; // = $F1 ##REV2## 1-BYTE TRANSFORM FLAG
269 unsigned char nsign; // = $EE SIGN OF #
270 unsigned char esign; // = $EF SIGN OF EXPONENT
271 unsigned char fchrflg; // = $F0 1ST CHAR FLAG
272 unsigned char digrt; // = $F1 # OF DIGITS RIGHT OF DECIMAL
274 unsigned char cix; // = $F2 CURRENT INPUT INDEX
275 unsigned char* inbuff; // = $F3/$F4 POINTS TO USER'S LINE INPUT BUFFER
276 unsigned int ztemp1; // = $F5/$F6 2-BYTE TEMPORARY
277 unsigned int ztemp4; // = $F7/$F8 2-BYTE TEMPORARY
278 unsigned int ztemp3; // = $F9/$FA 2-BYTE TEMPORARY
281 unsigned char degflg; // = $FB ##OLD## SAME AS RADFLG
282 unsigned char radflg; // = $FB ##OLD## 0=RADIANS, 6=DEGREES
285 FPREG* flptr; // = $FC/$FD 2-BYTE FLOATING POINT NUMBER POINTER
286 FPREG* fptr2; // = $FE/$FF 2-BYTE FLOATING POINT NUMBER POINTER
290 unsigned char stack[0x100]; // STACK
294 void (*vdslst)(void); // = $0200/$0201 DISPLAY LIST NMI VECTOR
295 void (*vprced)(void); // = $0202/$0203 PROCEED LINE IRQ VECTOR
296 void (*vinter)(void); // = $0204/$0205 INTERRUPT LINE IRQ VECTOR
297 void (*vbreak)(void); // = $0206/$0207 SOFTWARE BREAK (00) INSTRUCTION IRQ VECTOR
298 void (*vkeybd)(void); // = $0208/$0209 POKEY KEYBOARD IRQ VECTOR
299 void (*vserin)(void); // = $020A/$020B POKEY SERIAL INPUT READY IRQ
300 void (*vseror)(void); // = $020C/$020D POKEY SERIAL OUTPUT READY IRQ
301 void (*vseroc)(void); // = $020E/$020F POKEY SERIAL OUTPUT COMPLETE IRQ
302 void (*vtimr1)(void); // = $0210/$0201 POKEY TIMER 1 IRQ
303 void (*vtimr2)(void); // = $0212/$0203 POKEY TIMER 2 IRQ
304 void (*vtimr4)(void); // = $0214/$0205 POKEY TIMER 4 IRQ
305 void (*vimirq)(void); // = $0216/$0207 IMMEDIATE IRQ VECTOR
306 unsigned int cdtmv1; // = $0218/$0210 COUNT DOWN TIMER 1
307 unsigned int cdtmv2; // = $021A/$021B COUNT DOWN TIMER 2
308 unsigned int cdtmv3; // = $021C/$021D COUNT DOWN TIMER 3
309 unsigned int cdtmv4; // = $021E/$021F COUNT DOWN TIMER 4
310 unsigned int cdtmv5; // = $0220/$0221 COUNT DOWN TIMER 5
311 void (*vvblki)(void); // = $0222/$0223 IMMEDIATE VERTICAL BLANK NMI VECTOR
312 void (*vvblkd)(void); // = $0224/$0224 DEFERRED VERTICAL BLANK NMI VECTOR
313 void (*cdtma1)(void); // = $0226/$0227 COUNT DOWN TIMER 1 JSR ADDRESS
314 void (*cdtma2)(void); // = $0228/$0229 COUNT DOWN TIMER 2 JSR ADDRESS
315 unsigned char cdtmf3; // = $022A COUNT DOWN TIMER 3 FLAG
316 unsigned char srtimr; // = $022B SOFTWARE REPEAT TIMER
317 unsigned char cdtmf4; // = $022C COUNT DOWN TIMER 4 FLAG
318 unsigned char intemp; // = $022D IAN'S TEMP
319 unsigned char cdtmf5; // = $022E COUNT DOWN TIMER FLAG 5
320 unsigned char sdmctl; // = $022F SAVE DMACTL REGISTER
323 unsigned char sdlstl; // = $0230 SAVE DISPLAY LIST LOW BYTE
324 unsigned char sdlsth; // = $0231 SAVE DISPLAY LIST HI BYTE
326 void* sdlst; // = $0230/$0231 (same as above as pointer)
328 unsigned char sskctl; // = $0232 SKCTL REGISTER RAM
330 unsigned char _spare_1; // = $0233 No OS use.
332 unsigned char lcount; // = $0233 ##1200xl## 1-byte relocating loader record
334 unsigned char lpenh; // = $0234 LIGHT PEN HORIZONTAL VALUE
335 unsigned char lpenv; // = $0235 LIGHT PEN VERTICAL VALUE
336 void (*brkky)(void); // = $0236/$0237 BREAK KEY VECTOR
338 unsigned char spare2[2]; // = $0238/$0239 No OS use.
340 void (*vpirq)(void); // = $0238/$0239 ##rev2## 2-byte parallel device IRQ vector
342 unsigned char cdevic; // = $023A COMMAND FRAME BUFFER - DEVICE
343 unsigned char ccomnd; // = $023B COMMAND
346 unsigned char caux1; // = $023C COMMAND AUX BYTE 1
347 unsigned char caux2; // = $023D COMMAND AUX BYTE 2
349 unsigned caux; // = $023C/$023D (same as above as word)
351 unsigned char temp; // = $023E TEMPORARY RAM CELL
352 unsigned char errflg; // = $023F ERROR FLAG - ANY DEVICE ERROR EXCEPT TIME OUT
353 unsigned char dflags; // = $0240 DISK FLAGS FROM SECTOR ONE
354 unsigned char dbsect; // = $0241 NUMBER OF DISK BOOT SECTORS
355 unsigned char* bootad; // = $0242/$0243 ADDRESS WHERE DISK BOOT LOADER WILL BE PUT
356 unsigned char coldst; // = $0244 COLDSTART FLAG (1=IN MIDDLE OF COLDSTART>
358 unsigned char spare3; // = $0245 No OS use.
360 unsigned char reclen; // = $0245 ##1200xl## 1-byte relocating loader record length
362 unsigned char dsktim; // = $0246 DISK TIME OUT REGISTER
364 unsigned char linbuf[40]; // = $0247-$026E ##old## CHAR LINE BUFFER
366 unsigned char pdvmsk; // = $0247 ##rev2## 1-byte parallel device selection mask
367 unsigned char shpdvs; // = $0248 ##rev2## 1-byte PDVS (parallel device select)
368 unsigned char pdimsk; // = $0249 ##rev2## 1-byte parallel device IRQ selection
369 unsigned reladr; // = $024A/$024B ##rev2## 2-byte relocating loader relative adr.
370 unsigned char pptmpa; // = $024C ##rev2## 1-byte parallel device handler temporary
371 unsigned char pptmpx; // = $024D ##rev2## 1-byte parallel device handler temporary
372 unsigned char _reserved_1[29]; // = $024E-$026A RESERVED
373 unsigned char chsalt; // = $026B ##1200xl## 1-byte character set alternate
374 unsigned char vsflag; // = $026C ##1200xl## 1-byte fine vertical scroll count
375 unsigned char keydis; // = $026D ##1200xl## 1-byte keyboard disable
376 unsigned char fine; // = $026E ##1200xl## 1-byte fine scrolling mode
378 unsigned char gprior; // = $026F GLOBAL PRIORITY CELL
379 unsigned char paddl0; // = $0270 1-BYTE POTENTIOMETER 0
380 unsigned char paddl1; // = $0271 1-BYTE POTENTIOMETER 1
381 unsigned char paddl2; // = $0272 1-BYTE POTENTIOMETER 2
382 unsigned char paddl3; // = $0273 1-BYTE POTENTIOMETER 3
383 unsigned char paddl4; // = $0274 1-BYTE POTENTIOMETER 4
384 unsigned char paddl5; // = $0275 1-BYTE POTENTIOMETER 5
385 unsigned char paddl6; // = $0276 1-BYTE POTENTIOMETER 6
386 unsigned char paddl7; // = $0277 1-BYTE POTENTIOMETER 7
387 unsigned char stick0; // = $0278 1-byte joystick 0
388 unsigned char stick1; // = $0279 1-byte joystick 1
389 unsigned char stick2; // = $027A 1-byte joystick 2
390 unsigned char stick3; // = $027B 1-byte joystick 3
391 unsigned char ptrig0; // = $027C 1-BYTE PADDLE TRIGGER 0
392 unsigned char ptrig1; // = $027D 1-BYTE PADDLE TRIGGER 1
393 unsigned char ptrig2; // = $027E 1-BYTE PADDLE TRIGGER 2
394 unsigned char ptrig3; // = $027F 1-BYTE PADDLE TRIGGER 3
395 unsigned char ptrig4; // = $0280 1-BYTE PADDLE TRIGGER 4
396 unsigned char ptrig5; // = $0281 1-BYTE PADDLE TRIGGER 5
397 unsigned char ptrig6; // = $0281 1-BYTE PADDLE TRIGGER 6
398 unsigned char ptrig7; // = $0283 1-BYTE PADDLE TRIGGER 7
399 unsigned char strig0; // = $0284 1-BYTE JOYSTICK TRIGGER 0
400 unsigned char strig1; // = $0285 1-BYTE JOYSTICK TRIGGER 1
401 unsigned char strig2; // = $0286 1-BYTE JOYSTICK TRIGGER 2
402 unsigned char strig3; // = $0287 1-BYTE JOYSTICK TRIGGER 3
404 unsigned char cstat; // = $0288 ##old## cassette status register
406 unsigned char hibyte; // = $0288 ##1200xl## 1-byte relocating loader high byte
408 unsigned char wmode; // = $0289 1-byte cassette WRITE mode
409 unsigned char blim; // = $028A 1-byte cassette buffer limit
411 unsigned char _reserved_2[5]; // = $028B-$028F RESERVED
413 unsigned char imask; // = $028B ##rev2## (not used)
414 void (*jveck)(void); // = $028C/$028D 2-byte jump vector
415 unsigned newadr; // = $028E/028F ##1200xl## 2-byte relocating address
417 unsigned char txtrow; // = $0290 TEXT ROWCRS
418 unsigned txtcol; // = $0291/$0292 TEXT COLCRS
419 unsigned char tindex; // = $0293 TEXT INDEX
420 unsigned char* txtmsc; // = $0294/$0295 FOOLS CONVRT INTO NEW MSC
421 unsigned char txtold[6]; // = $0296-$029B OLDROW & OLDCOL FOR TEXT (AND THEN SOME)
423 unsigned char tmpx1; // = $029C ##old## 1--byte temporary register
425 unsigned char cretry; // = $029C ##1200xl## 1-byte number of command frame retries
427 unsigned char hold3; // = $029D 1-byte temporary
428 unsigned char subtmp; // = $029E 1-byte temporary
429 unsigned char hold2; // = $029F 1-byte (not used)
430 unsigned char dmask; // = $02A0 1-byte display (pixel location) mask
431 unsigned char tmplbt; // = $02A1 1-byte (not used)
432 unsigned char escflg; // = $02A2 ESCAPE FLAG
433 unsigned char tabmap[15]; // = $02A3-$02B1 15-byte (120 bit) tab stop bit map
434 unsigned char logmap[4]; // = $02B2-$02B5 LOGICAL LINE START BIT MAP
435 unsigned char invflg; // = $02B6 INVERSE VIDEO FLAG (TOGGLED BY ATARI KEY)
436 unsigned char filflg; // = $02B7 RIGHT FILL FLAG FOR DRAW
437 unsigned char tmprow; // = $02B8 1-byte temporary row
438 unsigned tmpcol; // = $02B9/$02BA 2-byte temporary column
439 unsigned char scrflg; // = $02BB SET IF SCROLL OCCURS
440 unsigned char hold4; // = $02BC TEMP CELL USED IN DRAW ONLY
442 unsigned char hold5; // = $02BD ##old## DITTO
444 unsigned char dretry; // = $02BD ##1200xl## 1-byte number of device retries
446 unsigned char shflok; // = $02BE 1-byte shift/control lock flags
447 unsigned char botscr; // = $02BF BOTTOM OF SCREEN 24 NORM 4 SPLIT
448 unsigned char pcolr0; // = $02C0 1-byte player-missile 0 color/luminance
449 unsigned char pcolr1; // = $02C1 1-byte player-missile 1 color/luminance
450 unsigned char pcolr2; // = $02C2 1-byte player-missile 2 color/luminance
451 unsigned char pcolr3; // = $02C3 1-byte player-missile 3 color/luminance
452 unsigned char color0; // = $02C4 1-byte playfield 0 color/luminance
453 unsigned char color1; // = $02C5 1-byte playfield 1 color/luminance
454 unsigned char color2; // = $02C6 1-byte playfield 2 color/luminance
455 unsigned char color3; // = $02C7 1-byte playfield 3 color/luminance
456 unsigned char color4; // = $02C8 1-byte background color/luminance
458 unsigned char _spare_2[23]; // = $02C9-$02DF No OS use.
461 unsigned char parmbl[6]; // = $02C9 ##rev2## 6-byte relocating loader parameter
463 void (*runadr)(void); // = $02C9 ##1200xl## 2-byte run address
464 unsigned int hiused; // = $02CB ##1200xl## 2-byte highest non-zero page address
465 unsigned int zhiuse; // = $02CD ##1200xl## 2-byte highest zero page address
469 unsigned char oldpar[6]; // = $02CF ##rev2## 6-byte relocating loader parameter
471 void (*gbytea)(void); // = $02CF ##1200xl## 2-byte GET-BYTE routine address
472 unsigned int loadad; // = $02D1 ##1200xl## 2-byte non-zero page load address
473 unsigned int zloada; // = $02D3 ##1200xl## 2-byte zero page load address
476 unsigned int dsctln; // = $02D5 ##1200xl## 2-byte disk sector length
477 unsigned int acmisr; // = $02D7 ##1200xl## 2-byte ACMI interrupt service routine
478 unsigned char krpdel; // = $02D9 ##1200xl## 1-byte auto-repeat delay
479 unsigned char keyrep; // = $02DA ##1200xl## 1-byte auto-repeat rate
480 unsigned char noclik; // = $02DB ##1200xl## 1-byte key click disable
481 unsigned char helpfg; // = $02DC ##1200xl## 1-byte HELP key flag (0 = no HELP)
482 unsigned char dmasav; // = $02DD ##1200xl## 1-byte SDMCTL save/restore
483 unsigned char pbpnt; // = $02DE ##1200xl## 1-byte printer buffer pointer
484 unsigned char pbufsz; // = $02DF ##1200xl## 1-byte printer buffer size
487 unsigned char glbabs[4]; // = $02E0-$02E3 byte global variables for non-DOS users
489 void (*runad)(void); // = $02E0 ##map## 2-byte binary file run address
490 void (*initad)(void); // = $02E2 ##map## 2-byte binary file initialization address
493 unsigned char ramsiz; // = $02E4 RAM SIZE (HI BYTE ONLY)
494 void* memtop; // = $02E5 TOP OF AVAILABLE USER MEMORY
495 void* memlo; // = $02E7 BOTTOM OF AVAILABLE USER MEMORY
497 unsigned char _spare_3; // = $02E9 No OS use.
499 unsigned char hndlod; // = $02E9 ##1200xl## 1-byte user load flag
501 unsigned char dvstat[4]; // = $02EA-$02ED STATUS BUFFER
503 unsigned int cbaud; // = $02EE/$02EF 2-byte cassette baud rate
505 unsigned char cbaudl; // = $02EE 1-byte low cassette baud rate
506 unsigned char cbaudh; // = $02EF 1-byte high cassette baud rate
509 unsigned char crsinh; // = $02F0 CURSOR INHIBIT (00 = CURSOR ON)
510 unsigned char keydel; // = $02F1 KEY DELAY
511 unsigned char ch1; // = $02F2 1-byte prior keyboard character
512 unsigned char chact; // = $02F3 CHACTL REGISTER RAM
513 unsigned char chbas; // = $02F4 CHBAS REGISTER RAM
515 unsigned char _spare_4[5]; // = $02F5-$02F9 No OS use.
517 unsigned char newrow; // = $02F5 ##1200xl## 1-byte draw destination row
518 unsigned int newcol; // = $02F6/$02F7 ##1200xl## 2-byte draw destination column
519 unsigned char rowinc; // = $02F8 ##1200xl## 1-byte draw row increment
520 unsigned char colinc; // = $02F9 ##1200xl## 1-byte draw column increment
522 unsigned char char_; // = $02FA 1-byte internal character (naming changed due to do keyword conflict)
523 unsigned char atachr; // = $02FB ATASCII CHARACTER
524 unsigned char ch; // = $02FC GLOBAL VARIABLE FOR KEYBOARD
525 unsigned char fildat; // = $02FD RIGHT FILL DATA <DRAW>
526 unsigned char dspflg; // = $02FE DISPLAY FLAG DISPLAY CNTLS IF NON-ZERO
527 unsigned char ssflag; // = $02FF START/STOP FLAG FOR PAGING (CNTL 1). CLEARE
532 unsigned char dcb[0x40]; // = $0300-$03XX DEVICE CONTROL BLOCK
534 unsigned char ddevic; // = $0300 PERIPHERAL UNIT 1 BUS I.D. NUMBER
535 unsigned char dunit; // = $0301 UNIT NUMBER
536 unsigned char dcomnd; // = $0302 BUS COMMAND
537 unsigned char dstats; // = $0303 COMMAND TYPE/STATUS RETURN
539 void* dbuf; // = $0304/$0305 data buffer address
541 unsigned char dbuflo; // = $0304 1-byte low data buffer address
542 unsigned char dbufhi; // = $0305 1-byte high data buffer address
545 unsigned char dtimlo; // = $0306 DEVICE TIME OUT IN 1 SECOND UNITS
546 unsigned char dunuse; // = $0307 UNUSED BYTE
548 unsigned int dbyt; // = $0308/$0309 number of bytes to transfer
550 unsigned char dbytlo; // = $0308 1-byte low number of bytes to transfer
551 unsigned char dbythi; // = $0309 1-byte high number of bytes to transfer
555 unsigned int daux; // = $030A/$030B first and second auxiliary
557 unsigned char daux1; // = $030A 1-byte first command auxiliary
558 unsigned char daux2; // = $030B 1-byte second command auxiliary
561 unsigned int timer1; // = $030C/$030D INITIAL TIMER VALUE
563 unsigned char addcor; // = $030E ##old## ADDITION CORRECTION
565 unsigned char jmpers; // = $030E ##1200xl## 1-byte jumper options
567 unsigned char casflg; // = $030F CASSETTE MODE WHEN SET
568 unsigned char timer2; // = $0310/$0311 2-byte final baud rate timer value
569 unsigned char temp1; // = $0312 TEMPORARY STORAGE REGISTER
571 unsigned char _spare_5; // = $0313 unused
572 unsigned char temp2; // = $0314 ##old## TEMPORARY STORAGE REGISTER
574 unsigned char temp2; // = $0313 ##1200xl## 1-byte temporary
575 unsigned char ptimot; // = $0314 ##1200xl## 1-byte printer timeout
577 unsigned char temp3; // = $0315 TEMPORARY STORAGE REGISTER
578 unsigned char savio; // = $0316 SAVE SERIAL IN DATA PORT
579 unsigned char timflg; // = $0317 TIME OUT FLAG FOR BAUD RATE CORRECTION
580 unsigned char stackp; // = $0318 SIO STACK POINTER SAVE CELL
581 unsigned char tstat; // = $0319 TEMPORARY STATUS HOLDER
583 HATABS hatabs[12]; // = $031A-$033D handler address table
584 unsigned int zeropad; // = $033E/$033F zero padding
586 HATABS hatabs[11]; // = $031A-$033A handler address table
587 unsigned int zeropad; // = $033B/$033C zero padding
588 unsigned char pupbt1; // = $033D ##1200xl## 1-byte power-up validation byte 1
589 unsigned char pupbt2; // = $033E ##1200xl## 1-byte power-up validation byte 2
590 unsigned char pupbt3; // = $033F ##1200xl## 1-byte power-up validation byte 3
594 IOCB iocb[8]; // = $0340-$03BF 8 I/O Control Blocks
595 unsigned char prnbuf[40]; // = $03C0-$3E7 PRINTER BUFFER
597 unsigned char _spare_6[151]; // = $03E8-$047F unused
599 unsigned char superf; // = $03E8 ##1200xl## 1-byte editor super function flag
600 unsigned char ckey; // = $03E9 ##1200xl## 1-byte cassette boot request flag
601 unsigned char cassbt; // = $03EA ##1200xl## 1-byte cassette boot flag
602 unsigned char cartck; // = $03EB ##1200xl## 1-byte cartridge equivalence check
603 unsigned char derrf; // = $03EC ##rev2## 1-byte screen OPEN error flag
604 unsigned char acmvar[11]; // = $03ED-$03F7 ##1200xl## reserved for ACMI, not cleared upon reset
605 unsigned char basicf; // = $03F8 ##rev2## 1-byte BASIC switch flag
606 unsigned char mintlk; // = $03F9 ##1200xl## 1-byte ACMI module interlock
607 unsigned char gintlk; // = $03FA ##1200xl## 1-byte cartridge interlock
608 void* chlink; // = $03FB/$03FC ##1200xl## 2-byte loaded handler chain link
609 unsigned char casbuf[131]; // = $03FD-$047F CASSETTE BUFFER
614 unsigned char usarea[128]; // = $0480 128 bytes reserved for application
618 unsigned char _spare_7[126]; // = $0500-$057D reserved for FP package / unused
619 unsigned char lbpr1; // = $057E LBUFF PREFIX 1
620 unsigned char lbpr2; // = $057F LBUFF PREFIX 2
621 unsigned char lbuff[128]; // = $0580-$05FF 128-byte line buffer
625 /* Define a structure with the zero page atari basic register offsets */
628 void* lowmem; // = $80/$81 POINTER TO BASIC'S LOW MEMORY
629 void* vntp; // = $82/$83 BEGINNING ADDRESS OF THE VARIABLE NAME TABLE
630 void* vntd; // = $84/$85 POINTER TO THE ENDING ADDRESS OF THE VARIABLE NAME TABLE PLUS ONE
631 void* vvtp; // = $86/$87 ADDRESS FOR THE VARIABLE VALUE TABLE
632 void* stmtab; // = $88/$89 ADDRESS OF THE STATEMENT TABLE
633 void* stmcur; // = $8A/$8B CURRENT BASIC STATEMENT POINTER
634 void* starp; // = $8C/$8D ADDRESS FOR THE STRING AND ARRAY TABLE
635 void* runstk; // = $8E/$8F ADDRESS OF THE RUNTIME STACK
636 void* memtop; // = $90/$91 POINTER TO THE TOP OF BASIC MEMORY
638 unsigned char _internal_1[0xBA-0x91-1]; // INTERNAL DATA
640 unsigned int stopln; // = $BA/$BB LINE WHERE A PROGRAM WAS STOPPED
642 unsigned char _internal_2[0xC3-0xBB-1]; // INTERNAL DATA
644 unsigned char errsav; // = $C3 NUMBER OF THE ERROR CODE
646 unsigned char _internal_3[0xC9-0xC3-1]; // INTERNAL DATA
648 unsigned char ptabw; // = $C9 NUMBER OF COLUMNS BETWEEN TAB STOPS
649 unsigned char loadflg; // = $CA LIST PROTECTION
651 unsigned char _internal_4[0xD4-0xCA-1]; // INTERNAL DATA
653 unsigned int binint; // = $D4/$D5 USR-CALL RETURN VALUE