Game Boy Advance >> Assembly
BG Mode 5(bitmap)
參考資訊:
1. doc
2. tonc
3. gbaasm
3. devkitPro
4. devkitarm-crtls
5. GBA-By-Example-3
6. devkitPro website
7. Compiling GBA programs on Linux with GCC
BG Mode 5支援bitmap(每一個像素點的顏色,由使用者指定),固定使用BG2CNT
每一個像素點的顏色由2Bytes表示
像素填充的起始位址是0x6000000
BG Mode對應的解析度
main.s
.equ DISPCNT, 0x4000000 .equ BG2CNT, 0x400000c .equ VRAM, 0x6000000 .global main .arm .text main: ldr r0, =DISPCNT ldr r1, =0x405 str r1, [r0] ldr r0, =BG2CNT ldr r1, =0x0000 str r1, [r0] ldr r0, =VRAM ldr r1, =0x03e0 ldr r2, =(160*128) 1: strh r1, [r0], #2 subs r2, r2, #1 bne 1b 2: b 2b
完成