Appendix Three

Dec.	Hex.	#	Label	Use of the Location(s)
2 6 7 10 12 14 16 18 48 54 55 66 73 77 82 83 84 85 87 88 106 128 130 132 134 136 140 142 144 186 195 201 212 224 237 238 239 241 251 512 528 530 532 534 546 548 559 560 580 623 624 632 636 644 656 657 660 694 702 703 704 708 736 738 741 743 752 756 763 764 768 794 832 40954 40958 49146 49150 53248 53252 53256 53260 53266 53270 53274 53277 53278 53279 53760 53768 53769 53770 53774 54272 54276 54277 54279 54281 54282 54283 54286 58460 58463 58466	2 6 7 A C E 10 12 30 36 37 42 49 4D 52 53 54 55 57 58 6A 80 82 84 86 88 8C 8E 90 BA C3 C9 D4 E0 ED EE EF F1 FB 200 210 212 214 216 222 224 22F 230 244 26F 270 278 27C 284 290 291 294 2B6 2BE 2BF 2C0 2C4 2E0 2E2 2E5 2E7 2F0 2F4 2FB 2FC 300 31A 340 9FFA 9FFE BFFA BFFE D000 D004 D008 D00C D012 D016 D01A D01D D01E D01F D200 D208 D209 D20A D20E D400 D404 D405 D407 D409 D40A D40B D40E E45C E45F E462	2 1 1 2 2 2 1 3 1 1 1 1 1 1 1 1 1 2 1 2 1 2 2 2 2 2 2 2 2 2 1 1 6 6 1 1 1 1 1 2 2 2 2 2 2 2 2 2 1 1 8 4 8 4 1 2 2 1 1 1 4 5 2 2 2 2 1 1 1 1 16 38 128 2 2 2 2 4 4 4 1 4 4 1 1 1 1 8 1 1 1 1 1 1 1 1 1 1 1 1 3 3 3	CASINI TRAMSZ TSTDAT DOSVEC DOSINI APPMHI POKMSK RTCLOK STATUS CRETRY DRETRY CRITIC ERRNO ATRACT LMARGN RMARGN ROWCRS COLCRS DINDEX SAVMSC RAMTOP LOMEM VNTP VNTD VVTP STMTAB STARP RUNSTK MEMTOP STOPLN ERRSAV PTABW FR0 FR1 EEXP NSIGN ESIGN DIGRT DEGFLG VDSLST VTIMR1 VTIMR2 VTIMR4 VIMIRQ VVBLKI VVBLKD SDMCTL SDLSTL COLDST GPRIOR PADDLx STICKx PTRIGx STRIGx TXTROW TXTCOL TXTMSC INVFLG SHFLOK BOTSCR PCOLRx COLORx RUNAD INITAD MEMTOP MEMLO CRSINH CHBAS ATACHR CH misc. HATABS IOCBx HPOSPx HPOSMx SIZEPx SIZEM COLPMx COLPFx COLBK GRACTL HITCLR CONSOL AUDxx AUDCTL STIMER RANDOM IRQEN DMACTL HSCROL VSCROL PMBASE CHBASE WSYNC VCOUNT NMIEN SETVBV SYSVBV XITVBV	Cassette initialization vector Equals 1 if A cartridge present Equals 1 if B cartridge present Disk software start vector Disk boot initialization address Top of applications memory POKEY interrupts enabled Real-time clock Internal SIO status storage location # of retries of commands # of device retries Critical I/O flag during VBI Disk I/O error number If > 127, screen colors rotate Left margin of screen Right margin of screen Current cursor row Current cursor column Current screen graphics mode Address of screen memory RAM size in pages BASIC's bottom of memory pointer Address of variable name table End of variable name table + 1 Address of variable value table Address of BASIC statement table String & array table pointer Address of BASIC run-time stack Top of BASIC memory Line # where program stopped Error code # Columns between TABs Floating point register 0 Floating point register 1 Value of exponent Sign of floating point number Sign of exponent # digits to right of decimal For radians = 0, for degrees = 6 NMI DLI vector POKEY timer 1 interrupt vector POKEY timer 2 interrupt vector POKEY timer 4 interrupt vector IRQ immediate vector VBLANK immediate vector VBLANK deferred vector Direct Memory Access enable Address of display list If = 0, warmstart; if = 1, coldstart Priority register - shadows $D01B Paddle values - shadow $D200-D207 Joystick values - shadow $D300-D301 Paddle triggers - shadow $D300-D301 Stick triggers - shadow $D010-D013 Text window cursor row Text window cursor column Address of text window If = 0, characters normal; if = 128, inverse If = 0, lower case; if = 64, upper case # text rows in text window Player-missile color Playfield color Run address from disk Initialization address from disk Top of free memory Bottom of free memory If = 0, cursor on; if > 0, cursor off Character set base register Stores color for FILL and DRAWTO Stores last character pressed Disk control block Handler table Input/Output Control Blocks B cartridge start address B cartridge initialization address A cartridge start address A cartridge initialization address Horizontal position of player x Horizontal position of missile x Size of player x; 0, 1 or 3 Size of all missiles Hardware player color registers Hardware playfield color registers Hardware background color register Graphics control register Clears collision registers 3 console buttons Audio frequency and control registers Audio control Start the POKEY timers Reads a random number 0-255 Interrupt request enable Direct Memory Access control Horizontal scroll enable Vertical scroll enable Address of PMBASE Address of character base Wait for horizontal synchchronization Line being drawn/2 NMI enable Set VBLANK vectors VBLANK stage 1 entry VBLANK exit

Notes: 1. # refers to the length of the address, in bytes
2. x refers to several related addresses; e.g., STICKx

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