Posted By
siz
on 2019-10-08
15:27:31
|  Re: What is this plus 4 mod?
That "4784" chip in fact is the 8551 ACIA. 4784 means it was manufactured in the 47th week of 1984. 
About those resistors/diodes: those were installed in the factory. Most of my plus4s has them.
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