oops. the 4 flops are upper left. Dwight
________________________________ From: dwight <dkel...@hotmail.com> Sent: Friday, June 16, 2017 9:31:15 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: Unknown boards The board in the bottom center is 6 buffers or inverters. The upper right is 4 flipflops. The upper right is some type of decoder( maybe an address or something ). The bottom right is a clock generator and the one on the lower left looks to be a massive gate, nor or nands depending on the logic used. Function is not the issue, what machine used it is the question. Dwight ________________________________ From: cctalk <cctalk-boun...@classiccmp.org> on behalf of Dominique Carlier via cctalk <cctalk@classiccmp.org> Sent: Friday, June 16, 2017 10:38:11 AM To: william degnan via cctech Subject: Re: Unknown boards This reminds me the 5 boards that were in the back of my Uniservo 10/14 and which were the terminators (to put on the last tape drive connected to the main controller). Maybe these boards have a similar function? On 16/06/2017 19:02, william degnan via cctech wrote: > I checked and they are no GE 4000 system boards. > > On Fri, Jun 16, 2017 at 12:57 PM, Jon Elson via cctech < > cct...@classiccmp.org> wrote: > >> On 06/16/2017 09:31 AM, David Gesswein via cctech wrote: >> >>> Can anyone identify these boards? Person I got them from can't >>> remember >>> anything about them. >>> http://www.pdp8online.com/ftp/misc/unknown_boards/ >>> >>> Date codes of 1964. Size 4.5"x3.25". Looks like used card edge for >>> keying but has separate 23 pin connector for electrical connection. >>> No useful markings I can see. Has card ## on the back. >>> >>> Search by picture didn't find anything. >>> >>> Thanks >>> >>> They remind me of RCA bizmac boards, which are likely to be related to >> GE, as that computer division changed hands a number of times. >> >> The connectors are Elco Varilok. >> >> Jon >>
