Posted By
MMS
on 2018-08-13
14:48:14
 |  Re: Plus 4
Maybe worth to buy a REALLY defective Plus/4 or even C16 really cheap.
Usually the TED or the CPU gives up, sometimes PSU or RAM.
I think PLA is the Top3 or Top4, but usually ROMs are OK.
So, I think there is a high chance(>70-80%), that from one or two really defective C16s/+4 you can repair this one's PLA + ROM
(and there would be a low chance to have finally a spare TED or a spare CPU).
I think BASIC ROM is equivalent in C16, PLA is the same, the U25 I am not sure. (I am not on my normal PC to doublecheck document)
BTW there is a retrofit (more reliable) PLA available, but absolutely not cheap.
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