Cool Group! If DIY Retro counts, then I am building a synth using only parts from 1980.
Posted by AtomicZombieDIY@reddit | retrobattlestations | View on Reddit | 11 comments
Uhlectronic@reddit
lol sampler that pulls out the 45
AtomicZombieDIY@reddit (OP)
Seems I can't post images here, so I uploaded a few new ones here...
http://forum.6502.org/viewtopic.php?f=4&t=3329&p=110474#p110474
Model now comes closer to the final color scheme.
Will be looking for the wood paneling soon.
fullmetaljackass@reddit
Challenges like this are fun! I've been working on building a z80 machine entirely from scavenged, period appropriate chips.
AtomicZombieDIY@reddit (OP)
Have a link? I enjoy seeing these homebrew systems come together.
fullmetaljackass@reddit
Let me see if I can find a picture. Nothing that exciting yet, it's still at the rats nest of wires on a breadboard stage. Basically, I've got Z80a with the appropriate buffers hooked up to a PROM. some SRAM, and an HD44780 LCD. The LCD isn't quite working yet. It occasionally displays something, but I'm still having some issues with the timings in my code.
I'm going all in on the vintage experience too! I scored one of these bad boys (not my picture) from the boneyard at my local hackerspace to debug with. It's a pretty cool piece of hardware. Once I get the appropriate cable I'll be able to load software onto it that can translate the raw signals from the bus into Z80 opcodes. I'm definitely looking forward to trying that out.
nullvalue1@reddit
This is really neat - keep us posted on your progress... But ok I'll ask... 17 CPUs, what are they all doing??
AtomicZombieDIY@reddit (OP)
This unit has 16 channels, each with 8 voices, and 4 filters. Each channel has it's own CPU and 512K sample space. The 17th CPU runs the OS and send commands to the GPU. Other than the 6502's and SRAM, every other part is 1980 l74 logic.
MenHallonGrabben@reddit
Wow! Very ambitious project and impressive result so far! Keep us posted!
AtomicZombieDIY@reddit (OP)
Thanks!
I will be doing a full video series on the build once it's done next year.
potatomasher092@reddit
Two words…
Fucking awesome
AtomicZombieDIY@reddit (OP)
I have most of the frame done, one of the 16 channels, and the video CRT circuit.
The final design contains over 1200 logic gates, 17 x 6502 CPU's and a ton of other stuff that was available in 1980. Here is a kind of build log I have been posting...
http://forum.6502.org/viewtopic.php?f=4&t=3329&start=795