I'll start off with this RAM fault on a STFM board. It was a 1MB machine, isolating the upper bank did not solve the problem. So the fault was in the lower bank somewhere.
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Rather than mess about, I put my pre-heater to work and removed all the chips.
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Then I stole the 4MB board From my test machine and soldered that in
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So now the machine is running YAART (1MB only) .
Why am I repairing the board you may ask ? Over the past few weeks I have been buying and doing swaps for various junk including some motherboards. This STFM style of board is my favourite style so I just did not want to scrap this board. Some boards I really cannot be bothered to repair them, so they will be robbed of parts for my store eventually.
I do not actually have a working assembled STFM anymore
myself and my girlfriend were playing games on it a few years ago, but it had the video sync problem so it came back home was taken to bits, and was just left that way I have no idea what happened to the motherboard or anything. So likely I will do some random bits and bobs to this board over time so I can actually build myself a complete STFM. Primarily this will likely be a games machine. So likely I will add IDE to it once all the work is finished
I will likely add a high density floppy kit and build another power supply for it at some point. It needs other fixes like the floppy and DMA pullups adding etc as well. I will also add a TOS104 to it as well.
