Applecorn/memmap.txt
2022-12-10 22:59:30 +00:00

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* Memory layout in main memory (Apple environment)
*
* ; $0000-$00FF Zero page
* ; $0100-$01FF Stack
* ; $0200-$02FF ProDOS string buffers
RTCBUF EQU $0200 ; $0200-$0227 Overwritten by RTC routines
* ; $0228-$023D $15 spare bytes
DRVBUF1 EQU $023E ; $023E Drive
DRVBUF2 EQU $023F ; $023F Prefix on current drive, length
* $0240 Prefix on current drive, path
CMDPATH EQU $0280 ; $0280 Path used to start Applecorn
* ; $02C0-$02FF $40 spare bytes
*
* ; $0300-$03CF File system core workspace
* ; $0300-$0382 Filename string buffers
MOSFILE1 EQU $0300 ; $0300 length
* ; $0301 64-byte string
MOSFILE2 EQU $0341 ; $0341 length
* ; $0342 64-byte string
ROMTOTL EQU $0382 ; $0382 Maximum ROM number
ROMTHIS EQU $0383 ; $0383 Currently loaded ROM
ROMADDRS EQU $0384 ; $0384 16xaddress of ROM filename
* ; $03A4-$03BD $1A spare bytes
* ;
* ; $03BE-$03CF: local copy of control block
* ; $03BE FPTR FPTR
* ; $03BF CHANNEL
* ; $03C0 LOAD LOAD ADDR
* ; $03C4 EXEC EXEC COUNT
* ; $03C8 SIZE START OFFSET
* ; $03CC ATTR END AUXCPY
* ; $03D0-$03EF ProDOS workspace
* ; $03D0-$03EC .SYSTEM workspace?
* ; $03ED-$03EE XFER address
* ; $03EF ProDOS reserved
* ; $03F0-$03FF Monitor/Applesoft locations
* ; $03F0-$03F1 BRKV
* ; $03F2-$03F3 RESETV
* ; $03F4 PWDRUP
* ; $03F5-$03F7 AMPERV
* ; $03F8-$03FA USERV (^Y)
* ; $03FB-$03FD NMIV
* ; $03FE-$03FF IRQV
*
* EQU $0400 ; $0400-$07FF Text Page 1 & screen holes - not for general use
* ; To do: 8 x 120-byte usable space
SCREEN EQU $0800 ; $0800-$0BFF Text Page 2
IOBUF0 EQU $0C00 ; $0C00-$0FFF For loading ROM, OSFILE, *.
IOBUF1 EQU $1000 ; $1000-$13FF Four open files for user program
IOBUF2 EQU $1400 ; $1400-$17FF
IOBUF3 EQU $1800 ; $1800-$1BFF
IOBUF4 EQU $1C00 ; $1C00-$1FFF
* ; $2000-$3FFF Hi-Res screen 1 - used for transient .SYSTEM loader code
* ; $4000- Code - to do: layout now different as .SYSTEM code
* -$6FFF
BLKBUF EQU $9000 ; $9000-$93FF 512-byte buffer plus channel data
BLKBUFEND EQU $9200
*
* ; $BF00-$BFFF ProDOS Global Page - reserved
Memory layout in aux memory (Acorn environment)
* ; $0000-$00FF Zero page
* ; $00-$8F Language workspace
* ; $90-$9F Network workspace
* ; $A0-$A7 NMI workspace
* ; $A8-$AF Non-MOS *command workspace
* ; $B0-$BF Temporary filing system workspace
* ; $C0-$CF Persistant filing system workspace
* ; $D0-$DF VDU driver workspace
* ; $E0-$EE Internal MOS workspace
* ; $EF-$FF MOS API workspace
* ; $0100-$01FF Stack
* ; $0200-$02FF Kernel vectors and workspace
* ; $0200-$0235 Vectors
* ; $0236-$028F OSBYTE variables
* ; $0290-$02ED
* ; $02EE-$02FF MOS control block
* ; $0300-$03FF
* ; $0300-
* ; $03E0-$03EF XFER workspace
* ; $03F0-$03FF
* ; $0400-$07FF Language workspace
* ; $0800-$0BFF Screen memory
* ; $0C00-$0DFF --> used as transient command buffer
* ; $0E00 Default PAGE