collapseos/recipes/rc2014/sdcard/glue.asm
2019-05-28 13:13:34 -04:00

88 lines
1.5 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
.equ RAMEND 0xffff
.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
.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
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