mirror of https://github.com/hsoft/collapseos.git
84 lines
1.4 KiB
NASM
84 lines
1.4 KiB
NASM
; named shell_.asm to avoid infinite include loop.
|
|
RAMSTART .equ 0x4000
|
|
RAMEND .equ 0x5000
|
|
STDIO_PORT .equ 0x00
|
|
FS_DATA_PORT .equ 0x01
|
|
FS_SEEKL_PORT .equ 0x02
|
|
FS_SEEKH_PORT .equ 0x03
|
|
|
|
jp init
|
|
|
|
#include "core.asm"
|
|
.define STDIO_GETC call emulGetC
|
|
.define STDIO_PUTC call emulPutC
|
|
STDIO_RAMSTART .equ RAMEND
|
|
#include "stdio.asm"
|
|
|
|
BLOCKDEV_RAMSTART .equ STDIO_RAMEND
|
|
BLOCKDEV_COUNT .equ 2
|
|
#include "blockdev.asm"
|
|
; List of devices
|
|
.dw emulGetC, emulPutC, 0, 0
|
|
.dw fsdevGetC, fsdevPutC, fsdevSeek, fsdevTell
|
|
|
|
#include "blockdev_cmds.asm"
|
|
|
|
.equ FS_RAMSTART BLOCKDEV_RAMEND
|
|
.equ FS_HANDLE_COUNT 2
|
|
#include "fs.asm"
|
|
|
|
SHELL_RAMSTART .equ FS_RAMEND
|
|
.define SHELL_IO_GETC call blkGetCW
|
|
.define SHELL_IO_PUTC call blkPutC
|
|
SHELL_EXTRA_CMD_COUNT .equ 6
|
|
#include "shell.asm"
|
|
.dw blkBselCmd, blkSeekCmd, fsOnCmd, flsCmd, fnewCmd, fdelCmd
|
|
|
|
init:
|
|
di
|
|
; setup stack
|
|
ld hl, RAMEND
|
|
ld sp, hl
|
|
call fsInit
|
|
ld a, 1 ; select fsdev
|
|
ld de, BLOCKDEV_GETC
|
|
call blkSel
|
|
call fsOn
|
|
xor a ; select ACIA
|
|
ld de, BLOCKDEV_GETC
|
|
call blkSel
|
|
call shellInit
|
|
jp shellLoop
|
|
|
|
emulGetC:
|
|
; Blocks until a char is returned
|
|
in a, (STDIO_PORT)
|
|
cp a ; ensure Z
|
|
ret
|
|
|
|
emulPutC:
|
|
out (STDIO_PORT), a
|
|
ret
|
|
|
|
fsdevGetC:
|
|
in a, (FS_DATA_PORT)
|
|
ret
|
|
|
|
fsdevPutC:
|
|
out (FS_DATA_PORT), a
|
|
ret
|
|
|
|
fsdevSeek:
|
|
ld a, l
|
|
out (FS_SEEKL_PORT), a
|
|
ld a, h
|
|
out (FS_SEEKH_PORT), a
|
|
ret
|
|
|
|
fsdevTell:
|
|
in a, (FS_SEEKL_PORT)
|
|
ld l, a
|
|
in a, (FS_SEEKH_PORT)
|
|
ld h, a
|
|
ret
|