View Full Version : odd even bios

March 5th, 2017, 05:47 PM
On the ampro LB 186 with an odd and even bios do they have to be the same size eproms? 128 for one and 64 for the other? 16384 file for the even and 8192 for the odd

March 5th, 2017, 08:00 PM
I thought the even and odd bytes would be equal to each other, kind of odd how one is so much smaller than the other. It sounds like they weren't interleaved evenly?

March 6th, 2017, 08:37 AM
My guess is that they're probably designed to use the smaller EPROMs, but someone ran short of them and substituted a larger one. Probably makes no difference. If you dump the larger one out, I suspect that you'll discover one of two things--half of it is unprogrammed (reading hex FF) or one half is just a duplicate of the other.