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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: dear1700 on December 15, 2005, 11:56:07 PM

Title: Jumper settings on GVP Jaws II turbocard
Post by: dear1700 on December 15, 2005, 11:56:07 PM

Greetings all,

I have a GVP turbo card with a 16meg gvp simm, but I cant seem to get my A1200 to recognize all the memory. I think there is a jumper setting that I do not have set properly, but can't find any info other than just pics of the unit on the internet.  I have also downloaded the install disk for said turbocard, but still nothing. THe gvp software says there is 4mb of ram, butI am certain it is a 16meg simm.  there are 2 simms sockets and I have it on the one closest to the front of the machine (i.e. furthest from the floppy drive.) When I use the other simm socket, it doesn't recognize any memory at all.

Anyhelp with this problem would be greatly appreciated.

Thanks in advance,

-Alan

Title: Re: Jumper settings on GVP Jaws II turbocard
Post by: banzai on December 16, 2005, 09:52:41 PM

I believe you're suffering from the "Bit-wide" problem.

When GVP marks the SIMM, they'll use the 16MBx8 value (because it looks bigger?). When actually used by the system, it's treated as a 4MBx32. Same amount of bits (128Mb), different way of expressing how they're organized.

I had the same problem with my earlier GVP boards for the A2000. Back then, they sold 'em as 256K or 1M, and they read as 1M/4M (just the opposite). Go figure.

banzai