; Copyright 2018 faddenSoft. All Rights Reserved. ; See the LICENSE.txt file for distribution terms (Apache 2.0). ; ; Sources: ; NiftyList, by Dave Lyons ; What's Where in the Apple, by William F. Luebbert *SYNOPSIS Symbols from the Apple II monitor ROM ; zero page usage MON_WNDLEFT @ $20 ;left column of scroll window MON_WNDWDTH @ $21 ;width of scroll window MON_WNDTOP @ $22 ;top of scroll window MON_WNDBTM @ $23 ;bottom of scroll window MON_CH @ $24 ;cursor horizontal displacement MON_CV @ $25 ;cursor vertical displacement MON_GBASL @ $26 ;base address for lo-res drawing (lo) MON_GBASH @ $27 ;base address for lo-res drawing (hi) MON_BASL @ $28 ;base address for text output (lo) MON_BASH @ $29 ;base address for text output (hi) ;MON_BAS2L @ $2A ;used when scrolling text ;MON_BAS2H @ $2B ;used when scrolling text MON_H2 @ $2C ;right end of horizontal line drawn by HLINE MON_V2 @ $2D ;bottom of vertical line drawn by VLINE MON_COLOR @ $30 ;lo-res graphics color MON_INVFLAG @ $32 ;text mask (255=normal, 127=flash, 63=inv) MON_PROMPT @ $33 ;prompt character, used by GETLN MON_CSWL @ $36 ;character output hook (lo) MON_CSWH @ $37 ;character output hook (hi) MON_KSWL @ $38 ;character input hook (lo) MON_KSWH @ $39 ;character input hook (hi) MON_PCL @ $3A ;program counter save MON_PCH @ $3B ;program counter save MON_A1L @ $3C ;general purpose MON_A1H @ $3D ;general purpose MON_A2L @ $3E ;general purpose MON_A2H @ $3F ;general purpose MON_A3L @ $40 ;general purpose MON_A3H @ $41 ;general purpose MON_A4L @ $42 ;general purpose MON_A4H @ $43 ;general purpose MON_A5L @ $44 ;general purpose MON_A5H @ $45 ;general purpose MON_RNDL @ $4E ;low byte of KEYIN "random" value MON_RNDH @ $4F ;high byte of KEYIN "random" value ; page 3 vectors MON_BRKV @ $03F0 2 ;address of BRK handler MON_SOFTEVEC @ $03F2 2 ;address of RESET handler MON_PWREDUP @ $03F4 ;power-up RESET checksum MON_USRADDR @ $03F8 3 ;jump to function that handles monitor Ctrl-Y MON_NMIVEC @ $03FB 3 ;jump to function that handles NMI MON_IRQADDR @ $03FE 2 ;address of IRQ handler ; monitor entry points MON_PLOT @ $F800 ;lo-res plot at X=Y-reg, Y=Acc MON_PLOT1 @ $F80E ;lo-res plot at X=Y-reg, Y per GBASL/H MON_HLINE @ $F819 ;lo-res horiz line at Y=Acc with X from $2c MON_VLINE @ $F828 ;lo-res vert line at X=Y-reg and Y from Acc to $2b MON_CLRSCR @ $F832 ;clear lo-res screen to black MON_CLRTOP @ $F836 ;clear top part of lo-res screen to black MON_GBASCALC @ $F847 ;compute gfx base addr for line in Acc MON_NXTCOL @ $F85F ;change lo-res color to (color)+3 MON_SETCOL @ $F864 ;set lo-res color to Acc MON_SCRN @ $F871 ;load Acc with lo-res value at Y=Acc, X=X-reg MON_INSDS1_2 @ $F88C MON_INSDS2 @ $F88E MON_GET816LEN @ $F890 MON_INSTDSP @ $F8D0 ;monitor/mini-asm display MON_PRNTYX @ $F940 ;print Y-reg/X-reg as 4 hex digits MON_PRNTAX @ $F941 ;print Acc/X-reg as 4 hex digits MON_PRNTX @ $F944 ;print X-reg as 2 hex digits MON_PRBLNK @ $F948 ;print 3 spaces MON_PRBL2 @ $F94A ;print multiple spaces, count in X-reg MON_PCADJ @ $F953 ;monitor/mini-asm PC adjust MON_TEXT2COPY @ $F962 MON_OLDIRQ @ $FA40 ;autostart ROM IRQ handler MON_BREAK @ $FA4C MON_OLDBRK @ $FA59 MON_RESET @ $FA62 ;autostart ROM RESET handler MON_PWRUP @ $FAA6 MON_SLOOP @ $FABA MON_REGDSP @ $FAD7 ;display register contents MON_RTBL @ $FB19 MON_PREAD @ $FB1E ;read paddle specifed by X-reg, return in Y-reg MON_PREAD4 @ $FB21 MON_INIT @ $FB2F ;screen initialization MON_SETTXT @ $FB39 ;set screen to text mode MON_SETGR @ $FB40 ;set screen to graphics mode MON_SETWND @ $FB4B ;set normal low-res graphics window MON_SETWND2 @ $FB51 MON_TABV @ $FB5B ;place cursor at line (A-reg) and column (CH) MON_APPLEII @ $FB60 ;clear screen and put "Apple II" into first line MON_SETPWRC @ $FB6F MON_VIDWAIT @ $FB78 ;autostart: handle Ctrl+S after CR MON_KBDWAIT @ $FB88 MON_VERSION @ $FBB3 ;used to detect system version MON_ZIDBYTE2 @ $FBBF ;used to detect system version MON_ZIDBYTE @ $FBC0 ;used to detect system version MON_BASCALC @ $FBC1 ;calculate text base address MON_BELL1 @ $FBDD ;sound bell regardless of output device MON_BELL1_2 @ $FBE2 MON_BELL2 @ $FBE4 ;sound bell MON_STORADV @ $FBF0 MON_ADVANCE @ $FBF4 ;move cursor right MON_VIDOUT @ $FBFD ;output Acc as text MON_BS @ $FC10 ;move cursor left MON_UP @ $FC1A ;move cursor up MON_VTAB @ $FC22 ;tab to row specified in CV MON_VTABZ @ $FC24 ;tab to row specified in Acc MON_CLREOP @ $FC42 ;clear screen from cursor to end of page MON_HOME @ $FC58 ;clear screen and reset text output to top-left MON_CR @ $FC62 ;perform a carriage return MON_LF @ $FC66 ;perform a line feed MON_SCROLL @ $FC70 ;scroll up one line MON_CLREOL @ $FC9C ;clear to end of line MON_CLREOLZ @ $FC9E ;clear from pos in Y-reg to end of line MON_WAIT @ $FCA8 ;delay for (26 + 27*Acc + 5*(Acc*Acc))/2 cycles MON_NXTA4 @ $FCB4 ;increment A4, fall through into NXTA1 MON_NXTA1 @ $FCBA ;increment A1; set carry if A1 >= A2 before inc MON_HEADR @ $FCC9 ;write cassette sync MON_WRTAPE @ $FCE5 ;casssette write MON_RD2BIT @ $FCFA ;cassette read MON_RDKEY @ $FD0C ;read key from input device via $38-39 MON_FD10 @ $FD10 MON_RDKEY1 @ $FD18 MON_KEYIN @ $FD1B ;get next key input from keyboard hardware MON_RDCHAR @ $FD35 ;calls RDKEY to get next char MON_GETLNZ @ $FD67 ;get a line of input MON_GETLN @ $FD6A ;get a line of input MON_GETLN0 @ $FD6C ;GETLN with prompt char in A-reg MON_GETLN1 @ $FD6F ;GETLN with no prompt char MON_CROUT1 @ $FD8B ;clear to EOL and print a carriage return MON_CROUT @ $FD8E ;print a carriage return MON_PRA1 @ $FD92 ;print CR, then hex of A1H/A1L, then minus sign MON_PRBYTE @ $FDDA ;print Acc as two-digit hex number MON_PRHEX @ $FDE3 ;print right nibble of Acc as single hex digit MON_COUT @ $FDED ;print Acc to output device via $36-37 MON_COUT1 @ $FDF0 ;print Acc to screen MON_COUTZ @ $FDF6 MON_IDROUTINE @ $FE1F ;RTS on 8-bit, ID routine on IIgs MON_MOVE @ $FE2C ;move bytes from A1 to A4 until A1=A2 MON_LIST @ $FE5E ;disassemble 20 instructions (not on GS) MON_SETINV @ $FE80 ;set video mode to inverse MON_SETNORM @ $FE84 ;set video mode to normal MON_SETKBD @ $FE89 ;reset char input handler to ROM MON_INPORT @ $FE8B ;set char input handler to slot in A-reg MON_SETVID @ $FE93 ;reset char output handler to ROM MON_OUTPORT @ $FE95 ;set char output handler to slot in A-reg MON_GO @ $FEB6 MON_WRITE @ $FECD ;write data to cassette MON_READ @ $FEFD ;read data from cassette MON_READ2 @ $FF02 ;read data from cassette MON_PRERR @ $FF2D ;print "ERR" and sound bell MON_BELL @ $FF3A ;sound bell MON_RESTORE @ $FF3F ;restore 6502 registers from $45-48 MON_SAVE @ $FF4A ;save 6502 registers to $45-49 MON_IORTS @ $FF58 ;JSR here to find out where one is MON_OLDRST @ $FF59 ;RESET entry point MON_MON @ $FF65 ;normal entry to monitor MON_MONZ @ $FF69 ;reset and enter monitor MON_MONZ2 @ $FF6C MON_MONZ4 @ $FF70 MON_DIG @ $FF8A MON_GETNUM @ $FFA7 MON_NXTCHR @ $FFAD ;part of GETLN input loop MON_TOSUB @ $FFBE MON_ZMODE @ $FFC7 ; locations defined by the 6502 MON_6502_NMI @ $FFFA 2 ;6502 NMI vector MON_6502_RESET @ $FFFC 2 ;6502 reset vector MON_6502_IRQ @ $FFFE 2 ;6502 IRQ vector