… or I’ve simply lost some pics
This post should’ve been written a long time ago but I’ve simply lost pics… This is the reason why I’ve called it “Random Commodore plus/4 hax”
Long story short, I’ve purchased eight broken Commodore Plus/4 machines. As usual, all machines had to be fixed, cleaned and retr0brighted. In this post I’ll describe some of the fixes that I’ve applied.
I don’t have an original PSU for Plus/4 but since the voltages are the same as in C64s, I’ve figured out that I can replace original sockets with the ones used to power up C64 🙂
This hack is quite straightforward. All I had to do was to de-solder original square sockets, remove unnecessary pins from round DIN7 socket and solder it on the motherboard.
All the keyboards required cleaning and some sets of key caps had to be retr0brighted. Rather easy job 😉
Key cap studs
Some of the key cap studs were broken and I had to replace them. I didn’t have spare original studs so I’ve used studs from Mitsumi keyboard of Amiga 500 keyboard. However, I had to trim them a bit.
Some of the keyboards were missing tiny springs that connect a GND signal. I’ve made new ones by cutting a small spring that I’ve found in my spare parts.
There was issue with broken power LEDs. The problem is that these LEDs are not standard and are not available in online stores nowadays (at least I didn’t find any).
Here is a comparison with an LED that are available – standard rectangular LEDs
I’ve figured out that I can trim these LEDs to a desired size.
Here is how it looked.
SD2IEC and CPU replacement
On the electronics part, I had to replace some of a fried 7501/8501 CPUs. That was easily achieved by using a an adapter for 6510 by hackjunk.com
This is a very smart hack by hackjunk.com which allows to use a C64s 6510 CPU. The drawback is that original ROM has to be replaced too.
I’ve also installed an SD2IEC inside some of the machines. This is an SD2IEC of my design. More details described in this blog post.
The problem with dark plastic is that after cleaning, it becomes matte and looks like it was treated with a sandpaper.
To bring back original color I usually use a thin oil – a baby oil for example.
Like I’ve written at the beginning, I’ve lost most of the pics for this post and I cannot fully describe everything, however, I think that presenting above hax was still useful 🙂
I’ve managed to fully restore five machines. The remaining rest has to wait for MOS TED replacement The ThED project – which is still undergoing heavy testing. Covid-19 and the mouSTer project slowed ThED down a bit but we will be fully working on it soon.
This is it for Random Commodore plus/4 hax post. I hope you liked it 🙂
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