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test.s
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.cpu arm7tdmi
.arm
b _start
.byte 0x24, 0xFF, 0xAE, 0x51
.byte 0x69, 0x9A, 0xA2, 0x21
.byte 0x3D, 0x84, 0x82, 0x0A
.byte 0x84, 0xE4, 0x09, 0xAD
.byte 0x11, 0x24, 0x8B, 0x98
.byte 0xC0, 0x81, 0x7F, 0x21
.byte 0xA3, 0x52, 0xBE, 0x19
.byte 0x93, 0x09, 0xCE, 0x20
.byte 0x10, 0x46, 0x4A, 0x4A
.byte 0xF8, 0x27, 0x31, 0xEC
.byte 0x58, 0xC7, 0xE8, 0x33
.byte 0x82, 0xE3, 0xCE, 0xBF
.byte 0x85, 0xF4, 0xDF, 0x94
.byte 0xCE, 0x4B, 0x09, 0xC1
.byte 0x94, 0x56, 0x8A, 0xC0
.byte 0x13, 0x72, 0xA7, 0xFC
.byte 0x9F, 0x84, 0x4D, 0x73
.byte 0xA3, 0xCA, 0x9A, 0x61
.byte 0x58, 0x97, 0xA3, 0x27
.byte 0xFC, 0x03, 0x98, 0x76
.byte 0x23, 0x1D, 0xC7, 0x61
.byte 0x03, 0x04, 0xAE, 0x56
.byte 0xBF, 0x38, 0x84, 0x00
.byte 0x40, 0xA7, 0x0E, 0xFD
.byte 0xFF, 0x52, 0xFE, 0x03
.byte 0x6F, 0x95, 0x30, 0xF1
.byte 0x97, 0xFB, 0xC0, 0x85
.byte 0x60, 0xD6, 0x80, 0x25
.byte 0xA9, 0x63, 0xBE, 0x03
.byte 0x01, 0x4E, 0x38, 0xE2
.byte 0xF9, 0xA2, 0x34, 0xFF
.byte 0xBB, 0x3E, 0x03, 0x44
.byte 0x78, 0x00, 0x90, 0xCB
.byte 0x88, 0x11, 0x3A, 0x94
.byte 0x65, 0xC0, 0x7C, 0x63
.byte 0x87, 0xF0, 0x3C, 0xAF
.byte 0xD6, 0x25, 0xE4, 0x8B
.byte 0x38, 0x0A, 0xAC, 0x72
.byte 0x21, 0xD4, 0xF8, 0x07
.ascii "LUMA\x0\x0\x0\x0\x0\x0\x0\x0"
.ascii "AMUL"
.ascii "00"
.byte 0x96
.byte 0x0
.byte 0x0
.fill 0x7,0x1,0x0
.byte 0x45
.byte 0x0
.fill 0x2,0x1,0x0
.arm
nop
.byte 0x0
.byte 0x0
.fill 0x1A,0x1,0x0
.arm
nop
.arm
.func
_start:
mov r9, #0x1
rsbs r9, #0x0
adds r9, #0x2
mov r9, r9, LSL #0x1F
subs r9, #0x1
mov sp, #0x450
swi #0x3 @ Comment on other emulators.
ldr lr, =start
bx lr
.endfunc
.thumb
.func
.thumb_func
start:
@ Set up video mode:
ldr r0, .ioAddr
@ Already at DISPCNT.
ldr r1, .displayControl
strh r1, [r0]
@ Set up palette:
ldr r0, .paletteAddr
ldr r1, .backgroundColour
strh r1, [r0]
ldr r1, .paletteIndex
lsl r1, #0x1 @ Multiply by two.
add r0, r1 @ Apply index.
ldr r1, .foregroundColour
strh r1, [r0]
@ Set up loop:
@ - r0 is the current pixel address.
@ - r1 is the palette value/index.
@ - r2 is the addend.
@ - r3 is the last pixel address.
ldr r0, .videoAddr
ldr r1, .paletteIndex
bic r2, r2
mov r3, #0x4B
lsl r3, #0x9
add r3, r0
@ Plot pixels:
@ TO-DO: Plot correctly (bytewise).
.loop:
strb r1, [r0]
add r0, r2
add r2, #0x1
cmp r0, r3
bge .restart
@bge .stop
b .loop @ Repeat loop.
@ Restart loop:
.restart:
ldr r0, .videoAddr
b .loop
.stop:
b .stop
.endfunc
.align
.ioAddr:
.word 0x04000000
.align
.displayControl:
.word 0x0404
.align
.paletteAddr:
.word 0x05000000
.align
.paletteIndex:
.word 0xFF
.align
.backgroundColour:
.word 0b0000100001000010
.align
.foregroundColour:
.word 0b0001001010011110
.align
.videoAddr:
.word 0x06000000