From: Otto Tuil Newsgroups: comp.sys.transputer Subject: Re: Need help with INMOS transputer system Date: Wed, 21 Oct 1998 13:28:56 +0200 Organization: Ericsson Radio Systsems B.V. Message-Id: <362DC578.B0C1A99A@erh.ericsson.se> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Daniel Haude wrote: > Hi experts, > > I have the following problem: At our university lab we have a > transputer-based measurement control system with software written by > another guy some time ago (I can describe the setup more detailed in case > it is needed). I have upgraded a 4MByte T805 TRAM module to 16MB, and the > problem is that the iserver program now stops with an error message: > "Couldn't load byte 2323 into boot link" or some such. This ONLY happens > when I actually tell the system about the 16MB in the .pgm file; when I > leave it at 4MB, everythinhg runs like before. > 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. Good luck, Otto.