4 ms·
The point of using relays was for the sound. Reed relays dont make loud enough clack and going solid state is pointless, you can go directly with transistors th
by artemonster 3y ago
The point of using relays was for the sound. Reed relays dont make loud enough clack and going solid state is pointless, you can go directly with transistors then. Regarding more info I am very lazy at doing writups and schematics are all hand drawn, so its highly unlikely I will ever publish anything about it. It has 280 relays, based off two clocks with 4 phases (typical latch design from 80s), 12 bit PC, 8 bit ACC, zero and carry flags, immediate, direct and indirect adressing modes. Loud, noisy and totally useless. Memory interface is emulated via attached MCU
- gus_massa 3y agoPosting about this looks like easy karma. I understand that writing about the projects takes a lot of time, but if you ever have time to do it, my guess is that it will be well received here. (Remember to include a video. The first thing I did in the current post was to play the video the heard the clicks.)
- deleted 3y ago[deleted]
- Aardwolf 3y agoWell, I think the 16-bit multiplication that takes longer than multiplying in your head, at least must sound very satisfying then! So the 4K memory is on a chip, right? (understandable!)
- artemonster 3y agoYes, there are two memory IF, one for program (12 addr, 16 data) and one for data (8 bit addr, 8 data) and this is directly attached to an IO board where MCU emulates both rom/ram chips. Additionally, MCU interprets the code and checks for expected signals. The added bonus is that you can easily add memory mapped io, i.e dot matrix display and mcu intercepts reads/writes to certain adresses and makes an action (ie toggle led, halt, or switch page)