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Thanks for your remarks. > the bus interface chips DEC used haven't been made in decades and are hard to find People seems to use 7438/74LS38 and 74LS02 with

Thanks for your remarks. > the bus interface chips DEC used haven't been made in decades and are hard to find People seems to use 7438/74LS38 and 74LS02 with some success. https://forum.vcfed.org/index.php?threads/which-receiver-and-driver-ics-for-q-bus.64369/ https://forum.vcfed.org/index.php?threads/which-receiver-and... An example could be seen from page 116 in February 1980 edition of Byte magazine: https://ia600307.us.archive.org/11/items/byte-magazine-1980-02/1980_02_BYTE_05-02_Graph_Theory.pdf https://ia600307.us.archive.org/11/items/byte-magazine-1980-...

kjs3 4y ago
Like I said, the alternatives can certainly work. Until they don't. And some alternatives work better than others. I checked some notes and found the Eric Smith[1] page where I learned about this. Eric has been around the retrocomputing and DEC world for a long time. I also have a note that the Russian КР559ИП3 is the equivalent to/copy of the original driver chips. I've never seen one. [1] http://www.brouhaha.com/~eric/retrocomputing/dec/interfacing/chips.html http://www.brouhaha.com/~eric/retrocomputing/dec/interfacing...