01-14-2020, 12:31 PM
Cool, thanks! I think the mystery is solved then. After running a few more disks through with 48tpi configured I think it's pretty clear that's the right setting for this drive with the jumpers that get it working. [I still have some research on that on my list too but for SCP purposes my notes in the other thread here are ± the latest.]
Besides just the visually obvious "missing middle" issue that goes away at 48tpi, the directory listings also tend to get much "fuller". For example one disk I imaged had about 8 items in it on 96tpi, including an "empty" folder called GAMES; imaging it on 48tpi yields more items at the root level, plus another half dozen files within the GAMES folder.
Sorry for all these blunt questions [albeit not sorry enough to promise this was my last one — especially since I've only just dipped my toes in on the 3.5" side ;-]. I'm kind of stumbling my way through a lot of new knowledge of how these floppies actually worked. I'm sure I plugged a few in back in the day but hardly messed with jumpers much less what each different machine's FDC was doing.
Besides just the visually obvious "missing middle" issue that goes away at 48tpi, the directory listings also tend to get much "fuller". For example one disk I imaged had about 8 items in it on 96tpi, including an "empty" folder called GAMES; imaging it on 48tpi yields more items at the root level, plus another half dozen files within the GAMES folder.
Sorry for all these blunt questions [albeit not sorry enough to promise this was my last one — especially since I've only just dipped my toes in on the 3.5" side ;-]. I'm kind of stumbling my way through a lot of new knowledge of how these floppies actually worked. I'm sure I plugged a few in back in the day but hardly messed with jumpers much less what each different machine's FDC was doing.