I think this is Racal-Readac, one of the early PCB software vendors (from the UK). Later bought up by Zunken (the big three are Cadence, Mentor, Zunken). Is the source straight PDP-15 assembly, or a mix with another high level language? It would be great to look at this, I hope it makes it to bitsavers... Randy ________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Al Kossow via cctalk <cctalk at classiccmp.org> Sent: Monday, October 1, 2018 3:17 PM To: cctalk at classiccmp.org Subject: Re: Source code listings from REDAC PDP-based PCB layout system. I'm interested. PDP-15 software in any form is pretty rare On 10/1/18 7:33 AM, Mattis Lind via cctalk wrote:

I have a version of the Racal Redac CAD system for the HP 2647 or 2648 graphic terminal I believe. Several DC 100 tapes and one or two boards full of custom ROMs... No documentation. I have not tried to do anything with it yet. Marc On Oct 1, 2018, at 4:42 PM, Paul Koning via cctalk <cctalk at classiccmp.org> wrote: I wonder if that's what DEC used internally? I remember some PDP15 systems around Merrimack NH that I was told were used for that. They had big displays, VS60 tubes or similar. paul