collapseos/recipes/rc2014/sdcard/glue.asm
2019-05-07 15:47:49 -04:00

56 lines
1.1 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
RAMSTART .equ 0x8000
RAMEND .equ 0xffff
ACIA_CTL .equ 0x80 ; Control and status. RS off.
ACIA_IO .equ 0x81 ; Transmit. RS on.
jr init
; *** JUMP TABLE ***
; Why not use this unused space between 0x02 and 0x28 for a jump table?
jp printstr
jp printHex
jp sdcWakeUp
jp sdcSendRecv
jp sdcWaitResp
jp sdcCmd
jp sdcCmdR1
jp sdcCmdR7
; interrupt hook
.fill 0x38-$
jp aciaInt
init:
di
; setup stack
ld hl, RAMEND
ld sp, hl
im 1
call aciaInit
call shellInit
; TODO - block device creation
ei
jp shellLoop
#include "core.asm"
ACIA_RAMSTART .equ RAMSTART
#include "acia.asm"
.define STDIO_GETC call aciaGetC
.define STDIO_PUTC call aciaPutC
STDIO_RAMSTART .equ ACIA_RAMEND
#include "stdio.asm"
SHELL_RAMSTART .equ STDIO_RAMEND
.define SHELL_IO_GETC call aciaGetC
.define SHELL_IO_PUTC call aciaPutC
SHELL_EXTRA_CMD_COUNT .equ 0
#include "shell.asm"
.equ SDC_PORT_CSHIGH 6
.equ SDC_PORT_CSLOW 5
.equ SDC_PORT_SPI 4
#include "sdc.asm"