5 boards to have a crack at — #13

Post #13 by techknight

Source Forum	68kMLA
Category	Troubleshooting
Post Date	Thu, 9 Apr 2015 - 23:35
Original URL	https://68kmla.org/bb/threads/5-boards-to-have-a-crack-at.1721/

Post

falen5 said:
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im working on one of the se/30 - just replaced 2 of the chips by the battery - uj2 f258 and uj3 f258. Do you know what they do.....there are 6 of them, all the same

the 74F258s are the RAM muxes. If these are missing/broken/rotten/bad, you will get the slow chimes of death.