.set VIDMEM, 0x20000000
mov r0, #0x884400 ; RGB value
mov r1, #VIDMEM ; memory start
LOOP2:
mov r2, #160*128 ; word count
LOOP:
str r0, [r1, r2, lsl #2]
sub r2, r2, #1
cmp r2, #0
bge LOOP
sub r0, r0, #0xff11
cmp r0, #0
bgt LOOP2