Floppy Drive Advice
jwest at classiccmp.org
Mon Sep 27 15:11:25 CDT 2010
> - There is NO need of having the SECOND drive set on BIOS. In DOS you
> can access it whenever it is set or not
> - There is an area on the system which lists the second drive. You can
> config it with some debug time
> - You can always use a switch that interchanges DRVSEL0 with DRVSEL1.
> It is a DPST switch you can wire easily.
I noticed on the FDC on the mainboard, there's maybe 2 or 3 pins that are
noticably absent from the normal connector. Perhaps they absconded with the
signals. I know absolutely nothing about the floppy drive interface & cable
signals. However, I need to build a custom cable anyways (as the existing
cable has an odd placement of the connectors, causing major twists in the
ribbon cable to get them right). I did notice that when powering up the
system, the 3.5 floppy drive light flashes for a moment but the 5.25 drive
never flashes. On an Old Tyme mainboard, this exact cable situated as it is
now - definitely worked for both drives.
> - Of course you can keep both cables outside the computer and switch
> them manually :)
Uggg. And mess up my nice rackmount Herc setup? No way ;) I recently added a
wireless bridge/switch to the rack, so that I can get internet to the thing
down in the basement from my wireless router upstairs. That part works like
a champ. Once this is all done, I'll have to look for a TCP stack for DOS. I
think Trumpet Winsock was strictly a windows thing. But perhaps DRDOS (full
install, not minimal) has support for this. But not thinking I'll find a
packet driver for a modern mainboard on-board NIC. I was also thinking of
putting a third partition on the drive, for those few times when I
absolutely must boot up windoze for some reason or another.
> Would you mind trying the first option? I have no setup ready-to-go
> that I could use to verify it to you
It will be a few days before I can try this option. Wife has a big "to-do"
at our house so the next couple days will be honey-do's to get ready for it.
Then I can get back to it and try. If not, perhaps someone can give me the
pinouts or diagram of how to lash up a cable that that connects to the
mainboard, lets drivesel go to the switch, and then hits the 5.25 edge-card
connector and the 3.5 IDC connector.
I have an IBM terminal question, but I'll start a new subject for that
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