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Forum Index : Microcontroller and PC projects : Preety neat clip
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Bryan1 Guru  Joined: 22/02/2006 Location: AustraliaPosts: 1450 |
with just 70 kilobits of memory how it done 50 years ago https://www.facebook.com/reel/1223112522301454 |
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| PhenixRising Guru Joined: 07/11/2023 Location: United KingdomPosts: 1360 |
Loved it :) Proper Link Is that memory "core-store" or "bubble-memory"? Used to use bubble memory cartridges but walk past an energized solenoid with one in your pocket and it would get wiped out  |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 7865 |
It's not normal core. That uses x and y wires with a sense wire through each ring. It's a similar idea though. It's not bubble because AFAIK that's essentially a long shift register that the "bubbles" get pushed along. I've not come across the Plated Wire memory used in the Voyagers before. It's very clever and much less bulky than core! Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| ville56 Senior Member  Joined: 08/06/2022 Location: AustriaPosts: 220 |
Plated wire memory was used a lot in the Univac 9000 series back in 1973. On such a machine I learned Fortran when in technical school. They told us that it was a lot faster and also cheaper to manufacture then core memory and readout was non-destructive. I also met a then retired lady back in 1982 which used to work for a core memory factoy, "knitting" core memories. From what she told me, that must have been a really demanding job.... And 70 kByte was quite a lot for the time. I remember what we had achieved with PDP8 and 4 KWord of memory. We controlled a complete in-circuit tester for PBAs. And on a PDP11 with 32 kB we easyly could run 10 concurrent users workin g on/editing their ICT programs. And also had a 20mA link to the ICT on the shopfloor for downloading the test programs... and yes, lots of our software was written in assembler. This were really interesting times. Sorry for boring you with my reminiscences. Gerald Edited 2025-01-08 05:14 by ville56 73 de OE1HGA, Gerald |
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