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37 lines
772 B
NASM
37 lines
772 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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RAMSTART .equ 0x8000
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RAMEND .equ 0xffff
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ACIA_CTL .equ 0x80 ; Control and status. RS off.
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ACIA_IO .equ 0x81 ; Transmit. RS on.
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jr init
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; interrupt hook
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.fill 0x38-$
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jp aciaInt
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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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#include "core.asm"
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ACIA_RAMSTART .equ RAMSTART
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#include "acia.asm"
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.define STDIO_GETC call aciaGetC
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.define STDIO_PUTC call aciaPutC
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STDIO_RAMSTART .equ ACIA_RAMEND
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#include "stdio.asm"
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SHELL_RAMSTART .equ STDIO_RAMEND
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.define SHELL_IO_GETC call aciaGetC
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.define SHELL_IO_PUTC call aciaPutC
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SHELL_EXTRA_CMD_COUNT .equ 0
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#include "shell.asm"
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