On 2020-04-30 03:29 PM, D. Hugh Redelmeier wrote:
| From: James Knott via talk<talk@gtalug.org>
| Here is a photo of a core memory plane that I have. It's 4K bits and came | from a Collins B8500 computer. There were 32 of these stacked in a module and | 4 modules in the memory chassis, for a total of 64 KB. |https://drive.google.com/open?id=1F0K1vDzT0HjrBDKySpQ8m91TPw2UDCsS
I find a Collins C8500 mentioned here, but no B series at all <https://en.wikipedia.org/wiki/Arthur_A._Collins>
The B preceded the C. That article also mentions the 8400. We had all 3 at CN Telecommunications/CNCP Telecommunications. The C8400 and B8500 systems were were on the 4th floor at 151 Front St. W and the C8500 in Air Canada on the 6th floor (later expanded to 7th). The Air Canada C8500s were a communications front end for a Univac system, but the CN systems were the message switching systems for various services CN offered, including the public telegraph system and others. The telegraph system later moved to some Data General Eclipse S130s. From Dec. 1977 to Sept 1989, I was a computer tech there and worked on a variety of systems, including Data General Nova & Eclipse, DEC PDP-8, PDP-11 and VAX 11/780, Pr1me, Philips DS714 and Collins. There was also an HP 1000, but I didn't work on that.