Looks like this might be a lingering symptom from the trouble we went through in February. Some old theads with links to even older threads don't go...
If your not familiar with the HIGHMEMV2, see the folowing Attachment 40433.It is a chip that replaces the rom in socket u44 on the IBM 5160 XT Motherboard to address memory up to 1 meg. I did the mod for 640KB on the motherboard about 25 years ago. So I have 256k chips in banks 0 and 1. I have enough 256k chips that I pulled from another board to fill the other two banks. I realize that the added memory will only give me about 64k of Contiguous base memory, but I believe there is a good