From: haude@physnet.uni-hamburg.de (Daniel Haude) Newsgroups: comp.sys.transputer Subject: Re: Need help with INMOS transputer system Date: 26 Oct 1998 08:09:59 GMT Organization: Hamburg University Message-Id: References: <362DC578.B0C1A99A@erh.ericsson.se> Reply-To: haude@physnet.uni-hamburg.de On Wed, 21 Oct 1998 13:28:56 +0200, Otto Tuil wrote: > As far as I know (I've been out of transputers for a while), the DRAM refresh > counter > of the transputer is only 11 bits wide. If you use normal DRAM this means you > can only > refresh 2^11 * 2^11 = 4MB. Did you considered this behaviour in your upgrade? > If not > you must add some extra logic to expand the refresh counter. Hmmm, the TRAM I use is equipped with 8 slots for 72-pin SIMMs, and in the system it's normally sold with (not mine), it comes with 256MB but can be upgraded even further. So I think the refresh logic has been taken care of. I have put in a single 16MB SIMM (the manual says I can do so). Next thing I do is try ou that SIMM in a regular PC if I can find one that has the same type already installed (In PCs the SIMMs can only be used in pairs. I guess that's because PCs use 32bit architecture unlike the transputer's 16bit). Thanks for the hints, --Daniel