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PiDP-8 update #4, assembly nearing completion, save some mounting of stuff in a more robust way.
OS/8 is running, lights are lighting and the stop switch halts the CPU, allowing you to single-step instruction by instruction. Don't try that on your Core i7!
I'll finish it off and we can take a look at a few of the programs we used to think were amazing back in the day
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At the graphics console of a DEC PDP 8, 1970
The PDP-8 is a 12-bit minicomputer that was produced by Digital Equipment Corporation (DEC). It was the first commercially successful minicomputer, with over 50,000 units being sold over the model's lifetime
Release date - March 22, 1965
Introductory price - $18,500, equivalent to about $150,100 in 2019
Ferromagnetic Core Memory
64x64 bit ferrite ring (core memory) memory that can store 4096 bits of information. In the 50's and 60's, computers the size of a room had such memories. They were usually handmade.
The picture above shows the memory used in the Russian Saratov-2 (PDP-8 copy) computer. Check these out too if you are interested in retro computing
Digital Equipment Corporation PDP-8
Computer History Museum - Mountain View, CA
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source: https://www.reddit.com/r/retrobattlestations/comments/e91klp/a_long_time_in_the_making_my_dec_pdp8e_lab8e/?utm_source=share&utm_medium=web2x
222 votes and 32 comments so far on Reddit
PiDP-8 update #6!
I ordered a custom mini repro of the Data General Dasher monitor, as popularized recently by the Apple TV show "Severence". (5 inch LCD within)
You are encouraged by the PIDP-8 developers to connect it to old school hardware and use the serial port to talk to it if possible, and I will eventually get my friend who has a VT220 to help me set it up.
For now though I'm enjoying the retro aesthetic here, even if nothing about it is particularly period-accurate. I'm using HDMI and forcing the Pi to use a green console foreground, and just a small Bluetooth keyboard that fits. It looks satisfyingly retro to me and ngl kinda cute.
The choice of a DG terminal to connect to a DEC computer might give some of my Digital alum friends pause, but there is a connection here:
The founder of Data General, Edson de Castro, originally worked for Digital before leaving to start DG. His notable contribution there? Lead developer of the PDP-8!
