Backplane !!! (Our primitive BUS)

Hello everyone! I know I promised a small tutorial on how to build some gates with TTL components, but since I have been working in the backplane of DUCK 1… I wanted to show it.

First of all… it’s a backplane… and it’s a bus… it’s everything.

I’m using 31 lanes or pure power!. 16 for each bus bit… a couple for power, others for the clock (+ and -) and a couple for the reset signals (+ and – too).
Some are reserved for future ideas.
Why 31 lanes? Just because I used 8 bit ISA Slots (no… I’m not using ISA standards). and I’m not using 62… just joined both front and back plates together (I don’t need more).

Trust me, it was a busy afternoon… designing it… deciding what to do, SOLDERING IT…. But it WORKS!!!. You can even upgrade the clock if you want… and of course… you can completely remove it and include it in a board if needed but… why do that if you can include it in the backplane?

Ok… this is supposed to be a short post, here it is! The Backplane!

Ready for soldering!
Ready for soldering!
A couple of components...
A couple of components… check out the rounded sockets!… future expansion!
The Clock in Place!
Here you can see the small 7555 that I’m using for clock… 1.6khz of pure power!. Rounded socket for easy removal and future upgrades (maybe a Crystal oscillator or similar). Also check out the USB port for powering!.
Final Product...
Final Product…. almost 600 soldering points…

And finally… (and subject for a future post). The Program Counter board running at 1.6khz in  free run mode!

I know… short post, but hopefully it will start generating some comments and interaction with curious people. Also it will give me some time to write the Gates Tutorials, the computer architecture, and the Program Counter explanation 🙂

See you soon!

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