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7cf3ed38da
Most of register fiddling routines (which is now the only thing contained in care.asm) are used by almost all userspace apps, often in inner loops. That makes the penalty of using jump tables for those a bit too high. Moreover, it burdens jump tables needlessly. Because this unit is very small (now that string routines are out), it makes sense to always include it in binaries.
43 lines
732 B
NASM
43 lines
732 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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.inc "err.h"
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.inc "ascii.h"
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.inc "core.asm"
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.inc "str.asm"
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.inc "parse.asm"
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.equ ACIA_RAMSTART RAMSTART
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.inc "acia.asm"
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.equ STDIO_RAMSTART ACIA_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 SHELL_RAMSTART STDIO_RAMEND
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.equ SHELL_EXTRA_CMD_COUNT 0
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.inc "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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call shellInit
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ei
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jp shellLoop
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