.define cmu
.sect .text
.sect .rom
.sect .data
.sect .bss
!size in R0
cmu:
cp R0, $2
jr NE, 1f
popl RR2, *RR14
pop R1, *RR14
pop R0, *RR14
cp R0, R1
ldk R0, $0
jr ULT, 2f
jp EQ, *RR2
inc R0
jp *RR2
2: dec R0
1: cp R0, $4
jr EQ, cmu4
jr unknown