collapseos/recipes/rc2014/zasm/glue.asm

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; 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
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.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
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jp blkSet
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jp fsFindFN
jp fsOpen
jp fsGetB
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jp cpHLDE ; approaching 0x38...
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; 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
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.inc "err.h"
.inc "core.asm"
.inc "parse.asm"
.equ ACIA_RAMSTART RAMSTART
.inc "acia.asm"
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.equ BLOCKDEV_RAMSTART ACIA_RAMEND
.equ BLOCKDEV_COUNT 4
.inc "blockdev.asm"
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; List of devices
.dw sdcGetB, sdcPutB
.dw blk1GetB, blk1PutB
.dw blk2GetB, blk2PutB
.dw mmapGetB, mmapPutB
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.equ MMAP_START 0xe000
.inc "mmap.asm"
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.equ STDIO_RAMSTART BLOCKDEV_RAMEND
.equ STDIO_GETC aciaGetC
.equ STDIO_PUTC aciaPutC
.inc "stdio.asm"
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.equ FS_RAMSTART STDIO_RAMEND
.equ FS_HANDLE_COUNT 2
.inc "fs.asm"
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.equ SHELL_RAMSTART FS_RAMEND
.equ SHELL_EXTRA_CMD_COUNT 11
.inc "shell.asm"
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.dw sdcInitializeCmd, sdcFlushCmd
.dw blkBselCmd, blkSeekCmd, blkLoadCmd, blkSaveCmd
.dw fsOnCmd, flsCmd, fnewCmd, fdelCmd, fopnCmd
.inc "fs_cmds.asm"
.inc "blockdev_cmds.asm"
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.equ PGM_RAMSTART SHELL_RAMEND
.inc "pgm.asm"
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.equ SDC_RAMSTART PGM_RAMEND
.equ SDC_PORT_CSHIGH 6
.equ SDC_PORT_CSLOW 5
.equ SDC_PORT_SPI 4
.inc "sdc.asm"
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.out SDC_RAMEND
init:
di
; setup stack
ld hl, RAMEND
ld sp, hl
im 1
call aciaInit
call fsInit
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call shellInit
ld hl, pgmShellHook
ld (SHELL_CMDHOOK), hl
xor a
ld de, BLOCKDEV_SEL
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call blkSel
ei
jp shellLoop
; *** blkdev 1: file handle 0 ***
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blk1GetB:
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ld ix, FS_HANDLES
jp fsGetB
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blk1PutB:
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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