megadrive_test1

view src/main.s @ 3:54739a11be66

find changesets by author, revision, files, or words in the commit message
- .data copy and .bss clearing - also made sure .data and .bss start and end markers are dword-aligned to make sure I can copy 4bytes at a time
author John Tsiombikas <nuclear@member.fsf.org>
date Tue, 31 Jan 2017 07:11:17 +0200
parents 909c22dc18d2
children
line source
1 .text
2 .global main
3 main:
4 move.l #0xc00000, %a0
5 move.l #0xc00004, %a1
6 move.w #0xc000, (%a1)
7 move.w #0, (%a1)
8 move.w #0x1f8, (%a0)
9 move.w #0x8700, (%a1) | set bg color to 0
10 move.w #0x8004, (%a1)
11 move.w #0x8144, (%a1) | enable display
12 rts