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https://github.com/hsoft/collapseos.git
synced 2024-09-06 08:48:45 +10:00
73c3fc7947
Move load/save to blkdev_cmds and add a new "poke" builtin shell cmd that is the mirror of "peek" and strictly uses stdio (no blkdev involved). This allows us to slim the minimal OS size but, more importantly, change the behavior of "load" so that we don't expect GetC to block until Z is set. This way, using "load X" with X being larger than the blkdev size won't block forever. This also brings our RC2014 minimal kernel below the 1K mark again.
41 lines
709 B
NASM
41 lines
709 B
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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#include "core.asm"
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#include "parse.asm"
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.equ ACIA_RAMSTART RAMSTART
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#include "acia.asm"
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.equ STDIO_RAMSTART ACIA_RAMEND
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#include "stdio.asm"
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.equ SHELL_RAMSTART STDIO_RAMEND
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.equ SHELL_EXTRA_CMD_COUNT 0
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#include "shell.asm"
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init:
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di
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; setup stack
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ld hl, RAMEND
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ld sp, hl
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im 1
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call aciaInit
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ld hl, aciaGetC
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ld de, aciaPutC
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call stdioInit
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call shellInit
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ei
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jp shellLoop
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