Another IC I Can't Identify

Rob Jarratt robert.jarratt at
Sun Nov 11 15:32:43 CST 2018

> -----Original Message-----
> From: cctalk [mailto:cctalk-bounces at] On Behalf Of Brent
> Hilpert via cctalk
> Sent: 11 November 2018 20:07
> To: General Discussion: On-Topic and Off-Topic Posts
> <cctalk at>
> Subject: Re: Another IC I Can't Identify
> On 2018-Nov-11, at 11:52 AM, Rob Jarratt via cctalk wrote:
> > Thanks for all the replies. If that is indeed what it is, then I still
have not
> been able to find the source of one of the signals that seems to be
> the Reset, every pin I have found so far is an input, I have not found it
> connected to the output of anything yet :-(
> Have you tried the reverse? : follow an origin that you know should be
> controlling reset, such as the power-on indication from the PS, and see if
> can trace it to the CPU.=

I have already found that source and it all looks OK. I think I have
identified another input to a NOR gate that is high and causing the reset,
but I can't find where it comes from.



More information about the cctalk mailing list