Yeah, that was a great way to "visualize" chip RAM contents. Curiously, on some later A500 OCS models, you could also see that into "slow RAM" expansion module

Yeah, that was a great way to "visualize" chip RAM contents. Curiously, on some later A500 OCS models, you could also see that into "slow RAM" expansion module range! Just needed to point bitplane pointers above 0x80000. It appeared at 0xc00000 for the CPU and 0x80000 for chipset.