mirror of
https://github.com/hsoft/collapseos.git
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180 lines
3.0 KiB
NASM
180 lines
3.0 KiB
NASM
; TODO: This recipe has not been tested since its conversion to the BASIC shell.
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; My PS/2 adapter has been acting up and probably has a loose wire. I need to
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; fix it beore I can test this recipe on real hardware.
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; But theoretically, it works...
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; 8K of onboard RAM
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.equ RAMSTART 0xc000
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.equ USER_CODE 0xd500
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; Memory register at the end of RAM. Must not overwrite
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.equ RAMEND 0xddd0
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jp init
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; *** JUMP TABLE ***
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jp strncmp
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jp upcase
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jp findchar
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jp parseHex
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jp parseHexPair
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jp blkSel
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jp blkSet
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jp fsFindFN
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jp fsOpen
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jp fsGetB
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jp fsPutB
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jp fsSetSize
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jp printstr
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jp _blkGetB
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jp _blkPutB
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jp _blkSeek
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jp _blkTell
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jp printcrlf
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jp stdioPutC
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jp stdioReadLine
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.fill 0x66-$
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retn
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.inc "err.h"
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.inc "ascii.h"
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.inc "blkdev.h"
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.inc "fs.h"
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.inc "core.asm"
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.inc "str.asm"
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.inc "sms/kbd.asm"
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.equ KBD_RAMSTART RAMSTART
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.equ KBD_FETCHKC smskbdFetchKCB
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.inc "kbd.asm"
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.equ VDP_RAMSTART KBD_RAMEND
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.inc "sms/vdp.asm"
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.equ STDIO_RAMSTART VDP_RAMEND
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.equ STDIO_GETC kbdGetC
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.equ STDIO_PUTC vdpPutC
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.inc "stdio.asm"
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.equ MMAP_START 0xd700
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; 0x180 is to leave some space for the stack
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.equ MMAP_LEN RAMEND-MMAP_START-0x180
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.inc "mmap.asm"
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.equ BLOCKDEV_RAMSTART STDIO_RAMEND
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.equ BLOCKDEV_COUNT 3
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.inc "blockdev.asm"
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; List of devices
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.dw mmapGetB, mmapPutB
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.dw f0GetB, f0PutB
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.dw f1GetB, f1PutB
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.equ FS_RAMSTART BLOCKDEV_RAMEND
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.equ FS_HANDLE_COUNT 2
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.inc "fs.asm"
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; *** BASIC ***
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; RAM space used in different routines for short term processing.
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.equ SCRATCHPAD_SIZE STDIO_BUFSIZE
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.equ SCRATCHPAD FS_RAMEND
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.inc "lib/util.asm"
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.inc "lib/ari.asm"
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.inc "lib/parse.asm"
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.inc "lib/fmt.asm"
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.equ EXPR_PARSE parseLiteralOrVar
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.inc "lib/expr.asm"
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.inc "basic/util.asm"
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.inc "basic/parse.asm"
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.inc "basic/tok.asm"
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.equ VAR_RAMSTART SCRATCHPAD+SCRATCHPAD_SIZE
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.inc "basic/var.asm"
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.equ BUF_RAMSTART VAR_RAMEND
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.inc "basic/buf.asm"
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.equ BFS_RAMSTART BUF_RAMEND
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.inc "basic/fs.asm"
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.inc "basic/blk.asm"
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.equ BAS_RAMSTART BFS_RAMEND
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.inc "basic/main.asm"
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; USER_CODE is set according to this output below.
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.out BAS_RAMEND
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init:
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di
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im 1
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ld sp, RAMEND
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; init a FS in mmap
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ld hl, MMAP_START
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ld a, 'C'
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ld (hl), a
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inc hl
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ld a, 'F'
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ld (hl), a
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inc hl
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ld a, 'S'
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ld (hl), a
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call fsInit
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xor a
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ld de, BLOCKDEV_SEL
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call blkSel
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call fsOn
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call kbdInit
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call vdpInit
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call basInit
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ld hl, basFindCmdExtra
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ld (BAS_FINDHOOK), hl
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jp basStart
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basFindCmdExtra:
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ld hl, basFSCmds
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call basFindCmd
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ret z
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ld hl, basBLKCmds
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call basFindCmd
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ret z
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ld hl, .mycmds
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call basFindCmd
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ret z
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jp basPgmHook
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.mycmds:
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.db "ed", 0
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.dw 0x1e00
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.db "zasm", 0
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.dw 0x2300
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.db 0xff
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f0GetB:
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ld ix, FS_HANDLES
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jp fsGetB
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f0PutB:
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ld ix, FS_HANDLES
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jp fsPutB
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f1GetB:
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ld ix, FS_HANDLES+FS_HANDLE_SIZE
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jp fsGetB
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f1PutB:
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ld ix, FS_HANDLES+FS_HANDLE_SIZE
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jp fsPutB
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; last time I checked, PC at this point was 0x1df8. Let's give us a nice margin
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; for the start of ed.
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.fill 0x1e00-$
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.bin "ed.bin"
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; Last check: 0x22dd
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.fill 0x2300-$
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.bin "zasm.bin"
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.fill 0x7ff0-$
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.db "TMR SEGA", 0x00, 0x00, 0xfb, 0x68, 0x00, 0x00, 0x00, 0x4c
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