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2a55bfd375
We use zasm's ability to use labels in .equ directive. We didn't do it before because for a while, we were in between scas and zasm (scas was used in automated tests) so we needed to use the lowest common denominator: zasm doesn't have macros and scas can't use labels in .equ directives. This forced us to add this layer of indirection. But now that we are completely cut from scas' dependency, we can use this nice zasm's ability.
43 lines
638 B
NASM
43 lines
638 B
NASM
; 8K of onboard RAM
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.equ RAMSTART 0xc000
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; Memory register at the end of RAM. Must not overwrite
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.equ RAMEND 0xfdd0
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jp init
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.fill 0x66-$
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retn
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.inc "err.h"
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.inc "core.asm"
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.inc "parse.asm"
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.equ PAD_RAMSTART RAMSTART
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.inc "sms/pad.asm"
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.equ VDP_RAMSTART PAD_RAMEND
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.inc "sms/vdp.asm"
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.equ STDIO_RAMSTART VDP_RAMEND
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.equ STDIO_GETC padGetC
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.equ STDIO_PUTC vdpPutC
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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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im 1
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ld sp, RAMEND
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call padInit
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call vdpInit
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call shellInit
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jp shellLoop
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.fill 0x7ff0-$
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.db "TMR SEGA", 0x00, 0x00, 0xfb, 0x68, 0x00, 0x00, 0x00, 0x4c
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