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- ; RAMSTART is a label at the end of the file
- .equ RAMEND 0xcfff
- ; Address of the *CL driver. Same as in recv.asm
- .equ COM_DRV_ADDR 0x0238
- ; in sync with user.h. Last BAS_RAMEND: 0x600b
- .equ USER_CODE 0x6100
-
- ; Free memory in TRSDOS starts at 0x3000
- .org 0x3000
- jp init
-
- ; *** Jump Table ***
- jp strncmp
- jp upcase
- jp findchar
- jp printstr
- jp printcrlf
- jp blkSet
- jp blkSel
- jp _blkGetB
- jp _blkPutB
- jp _blkSeek
- jp _blkTell
- jp fsFindFN
- jp fsOpen
- jp fsGetB
- jp fsPutB
- jp fsSetSize
- jp stdioPutC
- jp stdioReadLine
-
- .inc "err.h"
- .inc "blkdev.h"
- .inc "fs.h"
- .inc "ascii.h"
- .inc "core.asm"
- .inc "str.asm"
-
- .inc "trs80/kbd.asm"
- .inc "trs80/vid.asm"
- .equ FLOPPY_RAMSTART RAMSTART
- .inc "trs80/floppy.asm"
-
- .equ GRID_RAMSTART FLOPPY_RAMEND
- .equ GRID_ROWS TRS80_ROWS
- .equ GRID_COLS TRS80_COLS
- .equ GRID_SETCELL trs80SetCell
- .equ GRID_GETC trs80GetC
- .equ gridPushScr fastPushScr
- .inc "grid.asm"
- .equ BLOCKDEV_RAMSTART GRID_RAMEND
- .equ BLOCKDEV_COUNT 3
- .inc "blockdev.asm"
- ; List of devices
- .dw floppyGetB, floppyPutB
- .dw blk1GetB, blk1PutB
- .dw blk2GetB, blk2PutB
-
- .equ STDIO_RAMSTART BLOCKDEV_RAMEND
- .equ STDIO_GETC gridGetC
- .equ STDIO_PUTC gridPutC
- .equ STDIO_SETCUR gridSetCurH
- .inc "stdio.asm"
-
- .equ FS_RAMSTART STDIO_RAMEND
- .equ FS_HANDLE_COUNT 2
- .inc "fs.asm"
-
- ; *** BASIC ***
-
- ; RAM space used in different routines for short term processing.
- .equ SCRATCHPAD_SIZE STDIO_BUFSIZE
- .equ SCRATCHPAD FS_RAMEND
- .inc "lib/util.asm"
- .inc "lib/ari.asm"
- .inc "lib/parse.asm"
- .inc "lib/fmt.asm"
- .equ EXPR_PARSE parseLiteralOrVar
- .inc "lib/expr.asm"
- .inc "basic/util.asm"
- .inc "basic/parse.asm"
- .inc "basic/tok.asm"
- .equ VAR_RAMSTART SCRATCHPAD+SCRATCHPAD_SIZE
- .inc "basic/var.asm"
- .equ BUF_RAMSTART VAR_RAMEND
- .inc "basic/buf.asm"
- .equ BFS_RAMSTART BUF_RAMEND
- .inc "basic/fs.asm"
- .inc "basic/blk.asm"
- .inc "basic/floppy.asm"
- .equ BAS_RAMSTART BFS_RAMEND
- .inc "basic/main.asm"
-
- .out BAS_RAMEND
-
- init:
- ld sp, RAMEND
- call gridInit
- call floppyInit
- call fsInit
- call basInit
- ld hl, basFindCmdExtra
- ld (BAS_FINDHOOK), hl
-
- xor a
- ld de, BLOCKDEV_SEL
- call blkSel
-
- jp basStart
-
- ; Receive a byte from *cl and put it in A.
- ; Returns A > 0xff when receiving the last byte
- recvCmd:
- xor a
- ld (VAR_TBL+1), a ; pre-set MSB
- ; put a 0xff mask in B, which will become 0x7f if we receive a 0x20
- ld b, 0xff
- .inner:
- ld a, 0x03 ; @GET
- ld de, COM_DRV_ADDR
- rst 0x28
- jr nz, .maybeerror
- or a
- jr z, .eof ; Sending a straight NULL ends the comm.
- ; @PUT that char back
- ld c, a
- ld a, 0x04 ; @PUT
- ld de, COM_DRV_ADDR
- rst 0x28
- ret nz ; error
- ld a, c
- cp 0x20
- jr z, .escapechar
- ; not an escape char, good
- and b ; apply mask
- ld (VAR_TBL), a
- xor a ; ensure Z
- ret
- .maybeerror:
- ; was it an error?
- or a
- jr z, .inner ; not an error, just loop
- ret ; error
- .escapechar:
- ld b, 0x7f
- jr .inner
- .eof:
- dec a ; A = 0xff
- ld (VAR_TBL+1), a
- xor a ; ensure Z
- ret
-
- basFindCmdExtra:
- ld hl, basFloppyCmds
- call basFindCmd
- ret z
- ld hl, basBLKCmds
- call basFindCmd
- ret z
- ld hl, basFSCmds
- call basFindCmd
- ret z
- ld hl, .cmds
- call basFindCmd
- ret z
- jp basPgmHook
-
- .cmds:
- .db "recv", 0
- .dw recvCmd
- .db 0xff ; end of table
-
- fastPushScr:
- push hl
- ld hl, GRID_BUF
- call trs80PushScr
- pop hl
- ret
-
- ; *** blkdev 1: file handle 0 ***
-
- blk1GetB:
- ld ix, FS_HANDLES
- jp fsGetB
-
- blk1PutB:
- ld ix, FS_HANDLES
- jp fsPutB
-
- ; *** blkdev 2: file handle 1 ***
-
- blk2GetB:
- ld ix, FS_HANDLES+FS_HANDLE_SIZE
- jp fsGetB
-
- blk2PutB:
- ld ix, FS_HANDLES+FS_HANDLE_SIZE
- jp fsPutB
-
- RAMSTART:
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