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> On Jan 14, 2025, at 6:50 PM, Van Snyder via cctalk <cctalk@classiccmp.org> > wrote: > > Jay Jaeger has built a 1410 using FPGA, including 1401 compatibility. I > haven't kept up with the status so I don't know whether everything > works yet. The 1410 cpu runs and passes cpu dials in both 1410 and 1401 mode . Tape reads work, but way too slowly over a 115kbps usb serial connection, so I have been working on doing lamps, tape and maybe disk over UDP. Getting the UDP working on my particular dev board took some time. Tape in maybe 6 months, I hope. My last year in grad school I was part of a team working on an ALGOL68 to PDP-11 cross compiler (running on a UNIVAC 1110). I worked on direct pdp11 relocatable code gen from a quadruples intermediate form. We made good progress and got good grades, but it was never finished. > > 1401 (and 1410 and 7010) had a "branch if bit equal" instruction and > column-binary card reading and punching (both optional on 1401), but > nothing more for boolean operations. > >
