14 Jan
2025
14 Jan
'25
6:26 p.m.
Sent from my iPhone
On Jan 14, 2025, at 6:50 PM, Van Snyder via cctalk
<cctalk(a)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.