megadrive_test2

view src/vdpdefs.inc @ 7:108ecc582a11

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defined all the I/O register addresses in io.h
author John Tsiombikas <nuclear@member.fsf.org>
date Wed, 21 Jun 2017 06:49:50 +0300
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1 | vi:filetype=asm68k:
2 .equ VDP_PORT_DATA, 0xc00000
3 .equ VDP_PORT_CTL, 0xc00004
4
5 .equ VDP_REG_MODE1, 0
6 .equ VDP_REG_MODE2, 1
7
8 .equ VDP_WRITE_VRAM, 0x40000000
9 .equ VDP_WRITE_CRAM, 0xc0000000
10 .equ VDP_WRITE_VSRAM, 0x40000010
11 .equ VDP_READ_VRAM, 0
12 .equ VDP_READ_CRAM, 0x00000020
13 .equ VDP_READ_VSRAM, 0x00000010