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https://github.com/hsoft/collapseos.git
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88 lines
1.6 KiB
NASM
88 lines
1.6 KiB
NASM
; classic RC2014 setup (8K ROM + 32K RAM) and a stock Serial I/O module
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; The RAM module is selected on A15, so it has the range 0x8000-0xffff
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.equ RAMSTART 0x8000
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.equ RAMEND 0xffff
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.equ ACIA_CTL 0x80 ; Control and status. RS off.
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.equ ACIA_IO 0x81 ; Transmit. RS on.
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jp init
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; interrupt hook
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.fill 0x38-$
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jp aciaInt
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.inc "err.h"
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.inc "ascii.h"
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.inc "blkdev.h"
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.inc "core.asm"
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.inc "str.asm"
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.equ ACIA_RAMSTART RAMSTART
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.inc "acia.asm"
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.equ MMAP_START 0xd000
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.inc "mmap.asm"
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.equ BLOCKDEV_RAMSTART ACIA_RAMEND
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.equ BLOCKDEV_COUNT 1
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.inc "blockdev.asm"
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; List of devices
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.dw mmapGetB, mmapPutB
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.equ STDIO_RAMSTART BLOCKDEV_RAMEND
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.equ STDIO_GETC aciaGetC
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.equ STDIO_PUTC aciaPutC
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.inc "stdio.asm"
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.equ AT28W_RAMSTART STDIO_RAMEND
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.inc "at28w/main.asm"
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; *** BASIC ***
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; RAM space used in different routines for short term processing.
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.equ SCRATCHPAD_SIZE STDIO_BUFSIZE
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.equ SCRATCHPAD AT28W_RAMEND
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.inc "lib/util.asm"
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.inc "lib/ari.asm"
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.inc "lib/parse.asm"
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.inc "lib/fmt.asm"
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.equ EXPR_PARSE parseLiteralOrVar
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.inc "lib/expr.asm"
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.inc "basic/util.asm"
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.inc "basic/parse.asm"
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.inc "basic/tok.asm"
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.equ VAR_RAMSTART SCRATCHPAD+SCRATCHPAD_SIZE
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.inc "basic/var.asm"
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.equ BUF_RAMSTART VAR_RAMEND
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.inc "basic/buf.asm"
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.inc "basic/blk.asm"
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.equ BAS_RAMSTART BUF_RAMEND
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.inc "basic/main.asm"
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init:
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di
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; setup stack
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ld sp, RAMEND
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im 1
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call aciaInit
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xor a
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ld de, BLOCKDEV_SEL
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call blkSel
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call basInit
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ld hl, basFindCmdExtra
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ld (BAS_FINDHOOK), hl
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ei
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jp basStart
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basFindCmdExtra:
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ld hl, basBLKCmds
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call basFindCmd
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ret z
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ld hl, .mycmds
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jp basFindCmd
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.mycmds:
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.db "at28w", 0
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.dw at28wMain
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.db 0xff
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