mirror of
https://github.com/hsoft/collapseos.git
synced 2024-09-07 06:38:46 +10:00
2e8af376e3
The pgm module implements a shell hook so that when an unknown command is typed, we look into the mounted filesystem and look for a file with the same name as the command. If we find one, we load it in memory and run it.
93 lines
1.6 KiB
NASM
93 lines
1.6 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
|
|
.equ RAMEND 0xffff
|
|
.equ PGM_CODEADDR 0x9000
|
|
.equ ACIA_CTL 0x80 ; Control and status. RS off.
|
|
.equ ACIA_IO 0x81 ; Transmit. RS on.
|
|
|
|
jp init ; 3 bytes
|
|
|
|
; *** Jump Table ***
|
|
jp printstr
|
|
jp fsOpen
|
|
jp fsSeek
|
|
jp fsTell
|
|
jp fsGetC
|
|
|
|
; interrupt hook
|
|
.fill 0x38-$
|
|
jp aciaInt
|
|
|
|
#include "core.asm"
|
|
#include "parse.asm"
|
|
.equ ACIA_RAMSTART RAMSTART
|
|
#include "acia.asm"
|
|
.equ BLOCKDEV_RAMSTART ACIA_RAMEND
|
|
.equ BLOCKDEV_COUNT 3
|
|
#include "blockdev.asm"
|
|
; List of devices
|
|
.dw aciaGetC, aciaPutC, 0, 0
|
|
.dw sdcGetC, 0, sdcSeek, sdcTell
|
|
.dw blk2GetC, blk2PutC, blk2Seek, blk2Tell
|
|
|
|
#include "blockdev_cmds.asm"
|
|
|
|
.equ STDIO_RAMSTART BLOCKDEV_RAMEND
|
|
#include "stdio.asm"
|
|
|
|
.equ FS_RAMSTART STDIO_RAMEND
|
|
.equ FS_HANDLE_COUNT 1
|
|
#include "fs.asm"
|
|
#include "fs_cmds.asm"
|
|
|
|
.equ SHELL_RAMSTART FS_RAMEND
|
|
.equ SHELL_EXTRA_CMD_COUNT 8
|
|
#include "shell.asm"
|
|
.dw sdcInitializeCmd, blkBselCmd, blkSeekCmd
|
|
.dw fsOnCmd, flsCmd, fnewCmd, fdelCmd, fopnCmd
|
|
|
|
#include "pgm.asm"
|
|
|
|
.equ SDC_RAMSTART SHELL_RAMEND
|
|
.equ SDC_PORT_CSHIGH 6
|
|
.equ SDC_PORT_CSLOW 5
|
|
.equ SDC_PORT_SPI 4
|
|
#include "sdc.asm"
|
|
|
|
init:
|
|
di
|
|
; setup stack
|
|
ld hl, RAMEND
|
|
ld sp, hl
|
|
im 1
|
|
call aciaInit
|
|
xor a
|
|
ld de, BLOCKDEV_GETC
|
|
call blkSel
|
|
call stdioInit
|
|
call shellInit
|
|
ld hl, pgmShellHook
|
|
ld (SHELL_CMDHOOK), hl
|
|
|
|
ei
|
|
jp shellLoop
|
|
|
|
; *** blkdev 2: file handle 0 ***
|
|
|
|
blk2GetC:
|
|
ld de, FS_HANDLES
|
|
jp fsGetC
|
|
|
|
blk2PutC:
|
|
ld de, FS_HANDLES
|
|
jp fsPutC
|
|
|
|
blk2Seek:
|
|
ld de, FS_HANDLES
|
|
jp fsSeek
|
|
|
|
blk2Tell:
|
|
ld de, FS_HANDLES
|
|
jp fsTell
|