Here you will find +3 hardware related material, mostly suitable for all +3 versions.
The subjects covered are:
Although I am referring to the +3, the first three items may apply to the +2A as well.
Note: if you have (deep) knowledge in electronics, feel free to apply – or even improve – the solutions I’m offering here. If not, you may read it just for curiosity :)
There is also a hardware section describing my self-build +3. That is a project under construction and/or in a continuous process of modifying and improving some parts, like the CPU access timing, memory type, video board, PSU, etc.
Probably For sure, that’s a never ending project.