Declan, This all sounds familiar. Didn't you have a very similar problem a few years ago too? Something involving NMOS CPUs and pull-ups?
I haven't touched NMOS in ages (if ever) so I'm certainly no expert ... but one might think that they all might have been designed with the same (TTL) thresholds. I suppose that would be wishful thinking. Andy -- Author: Ingraham, Andrew INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
