A2630 & autoconfig space

[clemenza]

Hi! I've encountered a problem while installing a Commodore 2630 and a memory expansion in my A2000. The 2630 has 2 megs of fast RAM installed and my memory expansion card has 8MB of RAM. If I install both of the cards, my A2000 'sees' only 2MB of fast RAM (the memory of the accelerator) probably because I have 10MB of RAM in the autoconfig space. If I disable the RAM of the accelerator then I have 8MB of fast RAM (the memory of the memory expansion card) but the computer is much slower - almost as if the CPU was an 68000. To confirm this I ran sysinfo: with the memory of the 2630 enabled my A2000 had almost the same speed as the stock A3000 (not bad at all!). When using the memory of the expansion card sysinfo showed me that my A2000 had almost the same speed as the stock (68000) A2000! So, does anyone know how can I use the memory of the memory expansion without disabling the memory of the 2630?

[clemenza]

Yes, I did reduce the amount of RAM on the expansion board to 4MB resulting in 6MB of fast RAM but then I had system crashes when running Miami & Ibrowse (I also have an X-Surf III installed). I don't understand why is the A2000 so slow when disabling the fast RAM of the 2630 (and using the full 8MB of the memory expansion)

[clemenza]

OK, thanks, that's exactly what I'm trying to do - but I still can't understand why it crashes! I have no other cards like GFX or bridgeboard installed (only a Buddha IDE controller). And what's the reason for the memory on the memory expansion board (3-State Megamix) being so slower than the memory on the A2630?

[clemenza]

Thanks, anyway. I'll try using another memory expansion that I have (I think it's a MultiMegaCard or something like that). I believe it will work after all! It's a pity though not having enough fast RAM as my A2000 has the minimum amount of chip RAM too - it's an old OCS model...

[clemenza]

Well, finally it works with the following configuration: 2MB fast RAM on A2630 + 4MB fast RAM on MultiMegaCard + 2MB fast RAM on Megamix 2000 = 8 MB fast RAM working flawlessly! Sysinfo shows that my A2000 has now almost the same processing power as the stock A3000! After that, I added an Algor Pro and installed Fblit and WBctrl resulting in almost 400 KB of free chip memory! (that's why I wanted the 'full' 8MB of fast RAM!).