Thread by @bbbradsmith

Hrm... why doesn't the floppy controller status register have its non-DMA bit set, even though I've used a specify command to set it... and why (probably related) do I get only a single IRQ from the read track command...? 💾⚡🖥

Life is a mystery.

Alright I have coaxed 74 bytes of data out of the floppy controller. That's a start I guess.

I think I just need better information about the parameters to the µPD765's "read track" command. The datasheet I have sucks, and otherwise all the info I can find is from people who seem to have never tried to use it. 😠💾

I think my DOS floppy dumper almost works, except the IRQ written in C is too slow? Unfortunately Watcom's assembler is hideously underdocumented, and I can find no relevant examples, especially not for Real Mode programs. :(

Finally got the assembly version of the IRQ handler working, and actually got some fairly consistent data out of the read track command...

...but I don't think it's really the data I wanted. I'm going to shelf this project and see if I can build a fluxengine instead. :S

LOL I just wanted to buy the cheapest ATX socket on ebay to to make a little power jumper connector, and the cheapest one already has the wire stuck onto it.

"...for BTC" 🤣

So I wrote a floppy disk dumper program for DOS. I dunno if this is really a very useful thing, but it's open-source at least!
💾⚡🖥

github.com/bbbradsmith/fl…