Identifying Machine for DEC Memory

Back to the original topic, someone suggested the memory would fit a DECstation 2100. They were right! I have done a short post about it https://robs-old-computers.com/2020/04/04/memory-for-a-decstation-2100/. Thanks for the suggestion :-) Regards Rob On Fri, Apr 3, 2020 at 5:04 PM +0100, "Warner Losh via cctalk" <cctalk at classiccmp.org> wrote: On Fri, Apr 3, 2020 at 5:04 AM Liam Proven via cctalk wrote: Yea, it isn't as straight a line as I paint it... This explanation ignores that terminals like the VT52 pre-date the PC world and were made for some custom gear that DEC engineers made that had no relationship to NTSC. VT-52 was 1974 and had 80x24 lines. The Apple ][ was also designed for the TV, but wasn't 24x80 because most TVs at the time couldn't cope, but even it had custom CRTs and even on those custom CRTs there was no 80 column mode standard. But the VT-52 was just a reflection of the VT-50 which was 80x12 lines which was a reflection of the Datapoint-2200 which was introduced in 1970 which was 80x12 lines as well. DEC copied this, I've been told in classes in school ("the early terminals" is all I recall now), but I have no good references between the dots here. So the connection between 029 punch cards and terminals is clear... But beyond that back to hollerith and the census to the 029 punch cards is less clear... https://news.ycombinator.com/item?id=21340548 Ah, that's true... And the whole 80 column thing is pervasive today as a standard for any reason... Warner