While tinkering with a jailmac SE/30 motherboard and a IIfx ROM SIMM today, I discovered that the "Load Bank A first, larger memory must be in Bank A" restriction of the SE/30 has nothing to do with its memory controller, but to do with the RAM detection routine they use in the SE/30 ROM.
The SE/30 with IIfx ROM SIMM boots and runs fine with SIMMs only in Bank B. It fails to boot with the SE/30 ROM.
By the bye, does anybody have any of the VRAM chips for the SE/30 sitting around? My experiments and intuition tell me that replacing the VRAM chips might fix my jailmac problem.
The SE/30 with IIfx ROM SIMM boots and runs fine with SIMMs only in Bank B. It fails to boot with the SE/30 ROM.
By the bye, does anybody have any of the VRAM chips for the SE/30 sitting around? My experiments and intuition tell me that replacing the VRAM chips might fix my jailmac problem.