Went to HCC Retro Meeting. (SDK-85 Update)

Last Updated or created 2024-01-04

UPDATE 20240104

I’ve met Dirk, he brought his SDK85.
And demo-ed a working cassette interface, using audio cables and a second laptop.

Saw a presentation about the MC14500B a weird little chip, robots, retro rebuilds using Raspberries.

Update 20240104 some soldering

Meanwhile .. my old MicroTapes are not using the Intel AP-29 method for data, so that needs some work also.

Raspberry Pi History Case

Last Updated or created 2023-11-09

I started a little case for a collection of Raspberry devices.

Over the years, many Raspberries were designed and made.
It all started in 2012
I want to have a case with all RP’s i’ve used.

There are many iterations of the RPi, I’m missing a lot now. If you want to help me, send me old/broken raspberries to get the collection complete!

This is the case at the moment

Case with some Raspberries and Arduino’s I found lying around, I’m not going to dismantle projects. Only the RPi 1A, 4B, Zero, Zero W, Pico and RPi 400 are displayed.
Plastic sheet as protective layer still on there, should be clear as glass.

The case isn’t glued together yet. I’m not sure how and what to include.

  • Horizontal wooden bars to place the devices on?
  • Include a history of Arduino’s for now?
  • Put little notes in the case with information? Like my SDK-85 case?
  • ?

Get information about your RPi version

curl -L https://perturb.org/rpi?rev=$(awk '/^Revision/ { print $3 }' /proc/cpuinfo)

SDK-85 interface PCB soldered

Last Updated or created 2023-11-05

Using spacers, I can use the existing holes in the SDK to hold the interface PCB in place. Now I have to move my information sheet. 🙂

My scope didn’t save the test capture .. Next time.
But I could see the clear ones and zeros.

You can faintly see the data, stop start of a program is visible.

Dirk cleaned up a OCR version of the program, which I cleaned up some more, and found some errors.
So that should be okay now.