mirror of
https://github.com/a2-4am/4cade.git
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87 lines
3.5 KiB
Plaintext
87 lines
3.5 KiB
Plaintext
;license:MIT
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;(c) 2018-9 by 4am
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;
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;------------------------------------------------------------------------------
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; YE OLDE GRAND UNIFIED MEMORY MAP
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;
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; LC RAM BANK 1
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; D000..E4E9 - persistent data structures (gGlobalPrefsStore, gGamesListStore)
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; ...end of data and start of code are approximate, in between is unused...
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; ...if they ever overlap, things will go boom...
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; E9C9..FFF9 - main program code
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; FFFA..FFFF - NMI, reset, IRQ vectors
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;
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; LC RAM BANK 2
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; D000..D3FF - ProRWTS data
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; D400..D5FF - ProRWTS code
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; D600..D9FF - HGR font data
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; DA00..DD5C - ProRWTS glue code
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; DD5D..DEFF - unused
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; DF00..DFFF - backup of stack (during gameplay and self-running demos)
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;------------------------------------------------------------------------------
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; soft switches
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KBD = $C000 ; last key pressed (if any)
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CLEARKBD = $C010 ; clear last key pressed
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STOREOFF = $C000 ; STA then use the following 4 flags:
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READMAINMEM = $C002 ; STA to read from main mem
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READAUXMEM = $C003 ; STA to read from aux mem
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WRITEMAINMEM = $C004 ; STA to write to main mem
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WRITEAUXMEM = $C005 ; STA to write to aux mem
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CLRC3ROM = $C00A ; STA to use internal Slot 3 ROM (required to use 128K and DHGR)
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SETC3ROM = $C00B ; STA to use external Slot 3 ROM (required to detect VidHD in slot 3)
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CLR80VID = $C00C ; 40 columns (also used to get out of DHGR mode)
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SET80VID = $C00D ; 80 columns (also used to get into DHGR mode)
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PRIMARYCHARSET= $C00E ; no mousetext for you
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SLOT3STATUS = $C017 ; bit 7 only
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TBCOLOR = $C022 ; IIgs text foreground and background colors (also VidHD)
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NEWVIDEO = $C029 ; IIgs graphics modes (also VidHD)
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SPEAKER = $C030 ; chirp chirp
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CLOCKCTL = $C034 ; bits 0-3 are IIgs border color (also VidHD)
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SHADOW = $C035 ; IIgs auxmem-to-bank-E1 shadowing (also VidHD)
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PAGE1 = $C054 ; page 1 (affects text, HGR, DHGR)
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PAGE2 = $C055 ; page 2 (affects text, HGR, DHGR)
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DHIRESON = $C05E ; double hi-res on switch
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DHIRESOFF = $C05F ; double hi-res off switch
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; ROM routines and addresses
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; (prefixed because so much of the program runs from LC RAM, so don't call
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; these without thinking about memory banks first)
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ROM_TEXT2COPY =$F962 ; turn on alternate display mode on IIgs
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ROM_TEXT = $FB2F
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ROM_MACHINEID =$FBB3
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ROM_HOME = $FC58
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ROM_NORMAL = $FE84 ; NORMAL text (instead of INVERSE or FLASH)
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ROM_IN0 = $FE89 ; SETKBD
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ROM_PR0 = $FE93 ; SETVID
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; zero page
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PARAM = $00 ; used by PARAMS_ON_STACK macro, so basically everywhere
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PTR = $02
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SRC = $04
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DEST = $06
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SAVE = $08
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HTAB = $24
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VTAB = $25
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RNDSEED = $4E ; word
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Timeout = $ED ; 3 bytes (used by SearchMode)
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zpMachineStatus= $F0 ; bit 7 = 1 if machine has joystick
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; bit 6 = 1 if machine has 128K
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; bit 5 = 1 if machine has a VidHD card
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; bit 4 = 1 if machine is a IIgs
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; only used during init, then copied to MachineStatus in LC RAM
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zpCharMask = $F1 ; only uesd during init, then clobbered
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; $FE ; used by ParseGamesList
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; $FF ; used by ParseGamesList
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; main memory
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gPathname = $1F00 ; used by SetPath/AddToPath
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gKeyLen = $1F00 ; used by ParseGamesList
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gKey = $1F01
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gValLen = $1F80
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gVal = $1F81
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; actual constants
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SUPPORTS_SHR = %00110000 ; AND mask for MachineStatus
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