32bit button value dma controller address and code
Code:lui t0 $xxxx //first 16 bits controller pointer (real) lw t1 $xxxx(t0) //second 16 bits controller pointer lw t1 $xxxx(t1) //controller offset lui t2 $xxxx //first half button value ori t2 t2 $xxxx //second half button value lui t3 $xxxx //first 16 bits codes pointer (real) lw t3 $xxxx(t3) //second 16 bits codes pointer bne t1 t2 $xxxxxxxx //jr ra nop lui t4 $xxxx //first 16 bits codes value ori t4 t4 $xxxx // second 16 bits codes value sw t4 $xxxx(t3) //codes offset jr ra nop