; Copyright 2018 faddenSoft. All Rights Reserved. ; See the LICENSE.txt file for distribution terms (Apache 2.0). ; ; Sources: ; NiftyList, by Dave Lyons ; Various Apple II reference materials found online *SYNOPSIS Symbols from the Cxxx I/O area, common to most Apple II models. ; There's a lot here that you wouldn't find on an Apple ][+, but since ; this is for a disassembler it's okay to have extra stuff so long as it ; doesn't conflict. KBD < $C000 ;R last key pressed + 128 CLR80COL > $C000 ;W use $C002-C005 for aux mem (80STOREOFF) SET80COL @ $C001 ;W use PAGE2 for aux mem (80STOREON) RDMAINRAM @ $C002 ;W if 80STORE off: read main mem $0200-BFFF RDCARDRAM @ $C003 ;W if 80STORE off: read aux mem $0200-BFFF WRMAINRAM @ $C004 ;W if 80STORE off: write main mem $0200-BFFF WRCARDRAM @ $C005 ;W if 80STORE off: write aux mem $0200-BFFF SETSLOTCXROM @ $C006 ;W use peripheral ROM ($C100-CFFF) SETINTCXROM @ $C007 ;W use internal ROM ($C100-CFFF) SETSTDZP @ $C008 ;W use main stack and zero page SETALTZP @ $C009 ;W use aux stack and zero page SETINTC3ROM @ $C00A ;W use internal slot 3 ROM SETSLOTC3ROM @ $C00B ;W use external slot 3 ROM CLR80VID @ $C00C ;W disable 80-column display mode SET80VID @ $C00D ;W enable 80-column display mode CLRALTCHAR @ $C00E ;W use primary char set SETALTCHAR @ $C00F ;W use alternate char set KBDSTRB @ $C010 ;RW keyboard strobe RDLCBNK2 @ $C011 ;R bit 7: reading from LC bank 2 ($Dx)? RDLCRAM @ $C012 ;R bit 7: reading from LC RAM? RDRAMRD @ $C013 ;R bit 7: reading from aux/alt 48K? RDRAMWRT @ $C014 ;R bit 7: writing to aux/alt 48K? RDCXROM @ $C015 ;R bit 7: using internal slot ROM? RDALTZP @ $C016 ;R bit 7: using alt zero page, stack, & LC? RDC3ROM @ $C017 ;R bit 7: using external (slot 3) ROM? RD80COL @ $C018 ;R bit 7: 80STORE is on? RDVBLBAR @ $C019 ;R bit 7: not VBL (VBL signal is low)? RDTEXT @ $C01A ;R bit 7: using text mode? RDMIX @ $C01B ;R bit 7: using mixed mode? RDPAGE2 @ $C01C ;R bit 7: using page 2? RDHIRES @ $C01D ;R bit 7: using hi-res graphics? ALTCHARSET @ $C01E ;R bit 7: using alt char set? RD80VID @ $C01F ;R bit 7: using 80 columns? TAPEOUT @ $C020 ;RW toggle caseette tape output MONOCOLOR @ $C021 ;W color/mono TBCOLOR @ $C022 ;RW screen color (low is BG, high is FG) VGCINT @ $C023 ;R VGC interrupts MOUSEDATA @ $C024 ;R mouse data: high bit is button KEYMODREG @ $C025 ;R modifier key state DATAREG @ $C026 ;RW ADB command/data KMSTATUS @ $C027 ;RW ADB status ROMBANK @ $C028 ;RW ROM bank select (IIc Plus) NEWVIDEO @ $C029 ;RW video select (SHR) LANGSEL @ $C02B ;RW ROM bank select CHARROM @ $C02C ;R addr for character ROM test SLTROMSEL @ $C02D ;RW slot vs. ROM selection VERTCNT @ $C02E ;R read video counter bits (V5-VB) HORIZCNT @ $C02F ;R read video counter bits (VA-H0) SPKR @ $C030 ;RW toggle speaker DISKREG @ $C031 ;RW disk interface SCANINT @ $C032 ;W VGC interrupt clear CLOCKDATA @ $C033 ;RW battery RAM interface CLOCKCTL @ $C034 ;RW bits 0-3 = border color SHADOW @ $C035 ;RW inhibit shadowing CYAREG @ $C036 ;RW Configure Your Apple DMAREG @ $C037 ;RW SCCBREG @ $C038 ;RW SCC command channel B SCCAREG @ $C039 ;RW SCC command channel A SCCBDATA @ $C03A ;RW SCC data channel B SCCADATA @ $C03B ;RW SCC data channel A SOUNDCTL @ $C03C ;RW sound settings (0-3=volume) SOUNDDATA @ $C03D ;RW sound data SOUNDADRL @ $C03E ;RW low pointer SOUNDADRH @ $C03F ;RW high pointer STROBE @ $C040 ;R game I/O strobe INTEN @ $C041 ;RW read VBL interrupt MMDELTAX @ $C044 ;R mouse delta movement X MMDELTAY @ $C045 ;R mouse delta movement Y DIAGTYPE @ $C046 ;W self-test diagnostics CLRVBLINT @ $C047 ;W clear VBL interrupt CLRXYINT @ $C048 ;W clear XY interrupt EMUBYTE @ $C04F ;RW used by emulators to identify themselves TXTCLR @ $C050 ;RW display graphics TXTSET @ $C051 ;RW display text MIXCLR @ $C052 ;RW display full screen MIXSET @ $C053 ;RW display split screen TXTPAGE1 @ $C054 ;RW display page 1 TXTPAGE2 @ $C055 ;RW display page 2 (or read/write aux mem) LORES @ $C056 ;RW display lo-res graphics HIRES @ $C057 ;RW display hi-res graphics SETAN0 @ $C058 ;RW annunciator 0 off CLRAN0 @ $C059 ;RW annunciator 0 on SETAN1 @ $C05A ;RW annunciator 1 off CLRAN1 @ $C05B ;RW annunciator 1 on SETAN2 @ $C05C ;RW annunciator 2 off CLRAN2 @ $C05D ;RW annunciator 2 on SETAN3 @ $C05E ;RW annunciator 3 off SETDHIRES = $C05E ;W if IOUDIS set, turn on double hi-res CLRAN3 @ $C05F ;RW annunciator 3 on CLRDHIRES = $C05F ;W if IOUDIS set, turn off double hi-res TAPEIN @ $C060 ;R read cassette input BUTN3 = $C060 ;R switch input 3 BUTN0 @ $C061 ;R switch input 0 / open-apple BUTN1 @ $C062 ;R switch input 1 / closed-apple BUTN2 @ $C063 ;R switch input 2 / shift key PADDL0 @ $C064 ;R analog input 0 PADDL1 @ $C065 ;R analog input 1 PADDL2 @ $C066 ;R analog input 2 PADDL3 @ $C067 ;R analog input 3 STATEREG @ $C068 ;RW address state TESTREG @ $C06D ;test mode CLTRM @ $C06E ;clear test mode ENTM @ $C06F ;enable test mode PTRIG @ $C070 ;RW analog input reset RDIOUDIS < $C07E ;R status of IOU disabling SETIOUDIS > $C07E ;W disable IOU RDDHIRES < $C07F ;R status of double hi-res CLRIOUDIS > $C07F ;W enable IOU ; $C080 ;RW read RAM bank 2, write off ROMIN @ $C081 ;RWx2 read ROM, write RAM bank 2 ROMIN_RO @ $C082 ;RW read ROM, no write LCBANK2 @ $C083 ;RWx2 read/write RAM bank 2 ; C084-C087 repeats ; $C088 ;RW read RAM bank 1, write off ; $C089 ;RW read ROM, write RAM bank 1 ; $C08A ;RW read ROM, no write LCBANK1 @ $C08B ;RWx2 read/write RAM bank 1 ; C08C-C08F repeats CLRROM @ $CFFF ;disable slot C8 ROM ; Not strictly I/O locations, but they're in the neighborhood. ROM_AUXMOVE @ $C311 ROM_XFER @ $C314 ; ; I/O scratchpad RAM addresses ; ; Each slot has 8 bytes of storage available in the "screen holes" in ; text page 1. See Apple II Reference Manual table page 83, ; "Peripheral Slot Scratchpad RAM", and ; https://retrocomputing.stackexchange.com/a/2541/56 ; ; Slot number: ; * 1 2 3 4 5 6 7 ; $0478 $0479 $047A $047B $047C $047D $047E $047F ; $04F8 $04F9 $04FA $04FB $04FC $04FD $04FE $04FF ; $0578 $0579 $057A $057B $057C $057D $057E $057F ; $05F8 $05F9 $05FA $05FB $05FC $05FD $0SFE $05FF ; $0678 $0679 $067A $067B $067C $067D $067E $067F ; $06F8 $06F9 $06FA $06FB $06FC $06FD $06FE $06FF ; $0778 $0779 $077A $077B $077C $077D $077E $077F ; $07F8 $07F9 $07FA $07FB $07FC $07FD $07FE $07FF ; ; The slot 0 holes are shared among peripheral cards and the operating ; system, e.g. DOS puts the slot number of the peripheral card from ; which it was booted into $5F8. ; SCRNHOLE0 @ $0478 8 ;text page 1 screen holes SCRNHOLE1 @ $04F8 8 ;text page 1 screen holes SCRNHOLE2 @ $0578 8 ;text page 1 screen holes SCRNHOLE3 @ $05F8 8 ;text page 1 screen holes SCRNHOLE4 @ $0678 8 ;text page 1 screen holes SCRNHOLE5 @ $06F8 8 ;text page 1 screen holes SCRNHOLE6 @ $0778 8 ;text page 1 screen holes SCRNHOLE7 @ $07F8 8 ;text page 1 screen holes ACTV_PERIP_SLOT @ $07F8 ;slot num ($Cn) of active peripheral card