I don't know the organization. I'll think about it and/or try to find out. Spec/24 Series III was 24-bit acceleration. There were different transfer modes and programmable registers, etc., so there might be some splits. But, I mostly think it has to do with address space for the onboard RAM transfers. Anyway, I will look into it. There might be some software speed-ups for 8-bit...but 8-bit started in the original PDQ days, minimally. So, don't worry about 8-bit mode. There's no GAL split for 8 vs. 24-bit. In the first version, all the value and wow factor was in 24-bit acceleration.