68kMLA Classic Interface

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Mac SE/30 RCMUX line

Posted by: nscali on 2022-03-30 22:41:22 Currently working on a badly battery damaged se/30 board and trying to figure out where the RCMUX lines are supposed to go. On the Rom & Rom Address page of the revised schematics it shows two RCMUX lines one coming from the 6x 74f258 and the other from the PAL UH7. I am pretty sure the latter goes to UI8 Glue, but the other references page 9 which is either the power connector, pullups and pulldowns page (that I cannot find RCMUX on) or the blank page after it that references the "bed of nails" test rig. I am guessing there is an RCMUX testpoint somewhere that this would have interfaced with, but I wanted to throw this out there to see if anyone knows for sure?? Maybe I am just missing something obvious? Thanks!

Posted by: Bolle on 2022-03-30 23:37:46 The only important connections are RCMUX from the GLUE Pin 76 to UH7 Pin 2 and from there it's /RCMUX UH7 pin 18 through L15 to the six muxes.

Posted by: nscali on 2022-03-31 06:46:17 Awesome! Thats what I needed to know! Should have just reached out to you directly.... Thanks again!

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