Other useful test equipment (was: RE: Scope use...)

That thing was built on several Multibus-I cards with LOTS of parts. Each channel was sampled with a 4-bit shift-register that fed a half an 8-bit register and a 4kx4 SRAM (55ns, which, for a 16Kb sram was considered very fast). The whole thing was over 1100 IC's on 12 cards in three interconnected MULTIBUS cardcages plus a display circuit and a CPU for interacting with the "console" terminal port and driving the various controls. It made me regret I never built a Multibus-I wirewrap card of my own and to my standards. That would have saved a few cards. The system was intended for monitoring VME bus signals plus various additional channel signals for a test system. It was a major pain and I'm glad I've by now forgotten more than I remember about it. I got the thing to work failrly well, but by that time had much better ideas for a 2nd-generation device which I was never able to get someone to pay me to build. I did, however, build VME wire-wrap cards, capable of supporting the at-that-time relatively new IDC ribbon cable connectors most other cards wouldn't. It also allowed the use of PGA parts without a multi-K-buck adapter. I know a lot more about sampling circuits than I ever wanted to know, yet still don't think I'd like to build a LA without someone else specifying the triggering modes. I'd go on forever trying to figure out what was needed and what was just a whim. Dick ----- Original Message ----- From: <jpero(a)sympatico.ca> To: <classiccmp(a)classiccmp.org> Sent: Friday, July 21, 2000 2:20 PM Subject: Re: Other useful test equipment (was: RE: Scope use...) afford at was dedicated