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