waits for ly 150
enables lyc
sets lyc to 152
interrupt enable

on int
jumps to 0x1000
writes 0x20 to ff41
writes 0 to IF
does a bunch of nops
reads IF
outputs value of IF in hex

DMG-08 / CGB:
lycint152_m2irq_1.gb should output E0
lycint152_m2irq_2.gb should output E2