Adding option 488 to a Fluke/Gigatronics 6060B

[ZGoode]

I recently acquired a Fluke 6060B that unfortunately did not have option 488 installed, so I decided to go about replicating a replacement board for that.  I got lucky since the GPIB chip it relies on is a UPD7210, of which I have a few NAT7210's on hand (a drop in replacement).  This board design should be also compatible with the 6060A, 6061A/B, and possibly a few other models.

I have not tested this yet, as I just finished the eCAD design and have just sent it to JLCPCB.  I will post an update when the board is received and tested.
A weird quirk I saw in the various manual revisions I found is that sometimes it lists a 273 instead of a 373.  Although I am assuming that is a typo and they meant 373 since the 273 is only mentioned once in one revision.

[ZGoode]

I found one minor mistake with how the DIP switch was connected, I have updated it.

[coromonadalix]

better remove the "bad" files,  go in the attachements and uncheck them ...