How can this be? Does the rom of the 2630 map the memory it to the wrong place?
No, it is just the way it is. I know this from experience and it is backed up by the original 2630 manual which came with my A2500. You can add just 4mbs more of Zorro II ram--less if you use a Zorro II RTG card. The 2632 is the the only memory upgrade for this accelerator. You would be better of getting a GVP accelerator. They are faster, come with the same 4mb base memory, and leave you the full 8mb Zorro II memory. And above all, they come up for sale a lot more often than 2632s and usually go for less. I sold one last month for around $130.
