collapseos/recipes/rc2014/zasm/glue.asm
Virgil Dupras 7274dccbe7 Move ASCII consts to ascii.h
And made them shorter in name. The new ascii.h file allow reuse in userspace
code.
2019-11-13 20:38:06 -05:00

136 lines
2.3 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 RAM usage, because of SDC, is a bit high and bring us almost to 0x8500
; We allocate at least 0x200 bytes for the stack, which is why we have this
; threshold.
.equ RAMEND 0x8700
.equ PGM_CODEADDR RAMEND
.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 addDE
jp addHL
jp upcase
jp unsetZ
jp intoDE
jp intoHL
jp writeHLinDE
jp findchar
jp parseHex
jp parseHexPair
jp blkSel
jp blkSet
jp fsFindFN
jp fsOpen
jp fsGetB
jp cpHLDE ; approaching 0x38...
; interrupt hook
.fill 0x38-$
jp aciaInt
; *** Jump Table (cont.) ***
jp parseArgs
jp printstr
jp _blkGetB
jp _blkPutB
jp _blkSeek
jp _blkTell
jp printHexPair
jp sdcGetB
jp sdcPutB
jp blkGetB
.inc "err.h"
.inc "ascii.h"
.inc "core.asm"
.inc "parse.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"
.equ SHELL_RAMSTART FS_RAMEND
.equ SHELL_EXTRA_CMD_COUNT 11
.inc "shell.asm"
.dw sdcInitializeCmd, sdcFlushCmd
.dw blkBselCmd, blkSeekCmd, blkLoadCmd, blkSaveCmd
.dw fsOnCmd, flsCmd, fnewCmd, fdelCmd, fopnCmd
.inc "fs_cmds.asm"
.inc "blockdev_cmds.asm"
.equ PGM_RAMSTART SHELL_RAMEND
.inc "pgm.asm"
.equ SDC_RAMSTART PGM_RAMEND
.equ SDC_PORT_CSHIGH 6
.equ SDC_PORT_CSLOW 5
.equ SDC_PORT_SPI 4
.inc "sdc.asm"
.out SDC_RAMEND
init:
di
; setup stack
ld hl, RAMEND
ld sp, hl
im 1
call aciaInit
call fsInit
call shellInit
ld hl, pgmShellHook
ld (SHELL_CMDHOOK), hl
xor a
ld de, BLOCKDEV_SEL
call blkSel
ei
jp shellLoop
; *** 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