mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-24 07:08:05 +11:00
148 lines
2.5 KiB
NASM
148 lines
2.5 KiB
NASM
; classic RC2014 setup (8K ROM + 32K RAM) and a stock Serial I/O module
|
|
; The RAM module is selected on A15, so it has the range 0x8000-0xffff
|
|
.equ RAMSTART 0x8000
|
|
; Kernel RAMEND last check: 0x9933
|
|
; We allocate at least 0x100 bytes for the stack, which is why we have this
|
|
; threshold.
|
|
.equ RAMEND 0x9b00
|
|
.equ USER_CODE RAMEND ; in sync with user.h
|
|
.equ ACIA_CTL 0x80 ; Control and status. RS off.
|
|
.equ ACIA_IO 0x81 ; Transmit. RS on.
|
|
|
|
jp init ; 3 bytes
|
|
|
|
; *** Jump Table ***
|
|
jp strncmp
|
|
jp upcase
|
|
jp findchar
|
|
jp blkSel
|
|
jp blkSet
|
|
jp fsFindFN
|
|
jp fsOpen
|
|
jp fsGetB
|
|
jp printstr
|
|
jp _blkGetB
|
|
jp _blkPutB
|
|
jp _blkSeek
|
|
jp _blkTell
|
|
jp sdcGetB
|
|
jp sdcPutB
|
|
jp blkGetB
|
|
jp stdioPutC
|
|
|
|
; interrupt hook
|
|
.fill 0x38-$
|
|
jp aciaInt
|
|
|
|
.inc "err.h"
|
|
.inc "ascii.h"
|
|
.inc "blkdev.h"
|
|
.inc "fs.h"
|
|
.inc "core.asm"
|
|
.inc "str.asm"
|
|
.equ ACIA_RAMSTART RAMSTART
|
|
.inc "acia.asm"
|
|
.equ BLOCKDEV_RAMSTART ACIA_RAMEND
|
|
.equ BLOCKDEV_COUNT 4
|
|
.inc "blockdev.asm"
|
|
; List of devices
|
|
.dw sdcGetB, sdcPutB
|
|
.dw blk1GetB, blk1PutB
|
|
.dw blk2GetB, blk2PutB
|
|
.dw mmapGetB, mmapPutB
|
|
|
|
|
|
.equ MMAP_START 0xe000
|
|
.inc "mmap.asm"
|
|
|
|
.equ STDIO_RAMSTART BLOCKDEV_RAMEND
|
|
.equ STDIO_GETC aciaGetC
|
|
.equ STDIO_PUTC aciaPutC
|
|
.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"
|
|
.inc "basic/blk.asm"
|
|
.inc "basic/sdc.asm"
|
|
.equ BFS_RAMSTART BUF_RAMEND
|
|
.inc "basic/fs.asm"
|
|
.equ BAS_RAMSTART BFS_RAMEND
|
|
.inc "basic/main.asm"
|
|
|
|
.equ SDC_RAMSTART BAS_RAMEND
|
|
.equ SDC_PORT_CSHIGH 6
|
|
.equ SDC_PORT_CSLOW 5
|
|
.equ SDC_PORT_SPI 4
|
|
.inc "sdc.asm"
|
|
|
|
.out SDC_RAMEND
|
|
|
|
init:
|
|
di
|
|
ld sp, RAMEND
|
|
im 1
|
|
call aciaInit
|
|
call fsInit
|
|
call basInit
|
|
ld hl, basFindCmdExtra
|
|
ld (BAS_FINDHOOK), hl
|
|
|
|
xor a
|
|
ld de, BLOCKDEV_SEL
|
|
call blkSel
|
|
|
|
ei
|
|
jp basStart
|
|
|
|
basFindCmdExtra:
|
|
ld hl, basFSCmds
|
|
call basFindCmd
|
|
ret z
|
|
ld hl, basBLKCmds
|
|
call basFindCmd
|
|
ret z
|
|
ld hl, basSDCCmds
|
|
call basFindCmd
|
|
ret z
|
|
jp basPgmHook
|
|
|
|
; *** 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
|