exxos's Atari, Amiga & retro forum

Posted: **04 Jan 2023 20:15**

Was cleaning out my old bin of stuff to sell some things and found this. Appears to be a diode on the floppy controller?

PXL_20230104_185424441.MP.jpg

Posted: **04 Jan 2023 20:29**

Drops the voltage to the chip to "solve" bus noise issues. It was "common practice" on the IMP DMA chips and IMP shifters. Though don't recall ever seeing a diode on the 1772 itself. These were "factory bodges" done by Atari.

Posted: **04 Jan 2023 20:42**

I knew you would know! it is crazy how many revisions these systems went through

Posted: **04 Jan 2023 21:22**

32bitminus wrote: 04 Jan 2023 20:42 I knew you would know! it is crazy how many revisions these systems went through

Yeah absolutely. Also why I ultimately gave up and designed a new motherboard. It was just easier :lol: :roll:

exxos's Atari, Amiga & retro forum

What floppy controller mod is this? STF

What floppy controller mod is this? STF

Re: What floppy controller mod is this? STF

Re: What floppy controller mod is this? STF

Re: What floppy controller mod is this? STF