rbabel@babylon.rmt.sub.org (Ralph Babel) (02/25/91)
In article <667418906wkn9852@edmund.cs.andrews.edu> easton@edmund.cs.andrews.edu (Jeff Easton) writes: > A couple of months ago, GVP started advertising a 2Mb > model. [...] This leads me to belive that they redesigned > the memory card portion. Is this correct? Yup, this is correct. The processor board has also been redesigned just recently, btw. > o How do they acheive 2Mb? I'm assuming that they now > use four 256K SIMM's? No, it's two 1-Mbyte SIMMs (256 Kbit by 32). > o Is it really true that only the 50Mhz model supports > 4Mb SIMM's? As far as I remember: yes. > o Why only 20Mb's? It seems you should be able to load > all eight SIMM sockets with 4Mb parts and get a total > of 32 Mbytes. True, but this would require a different set of PALs. > o Now that they have apparently broken the 8Mb barrier. > Did they address the extra memory above 16Mb the same > way Commodore did in the 3000? The 20-meg configuration consists of two chunks of memory: 4 megs of Zorro-II RAM and 16 megs located at $01000000-$01ffffff. Both of them are configured automatically (i.e. no AddMem in your startup-sequence). > o Can I now keep my Zorro II memory card in the 1st 8Mb > and move the GVP memory above the 16Mb boundry? There's 4 megs of Zorro-II space left. Ralph