March 21, 2020 5:19 AM, "Eric Auer" <e.a...@jpberlin.de> wrote:
> Hi Michael, > > as you say WinXP sees the controller but can not format, > can it at least read existing floppies? Will the drive > spin up when XP tries to access it? Seems to spin up alright, don't think I have any formatted disks though... > About your project to connect either an ISA floppy controller > or directly a classic floppy drive without a controller (I am > not sure which method you imply) to a generic digital I/O card > the BIOSes of various virtual machines etc. are written in C, > so you could look in that direction and patch the port I/O to > the controller into suitable I/O card accesses to write some > custom "BIOS" which you can load as TSR in DOS on hardware :-) > > I suggest to start without DMA and just use PIO with classic > string I/O Assembly operations or even pure C language I/O to > keep things simple while developing. > Or maybe I have misunderstood you and the "digital research > multi I/O card" is what the BIOS of your old computer WANTS > to use for floppy access? Then I wonder why it does not work? Digital Research is a brand of card that happens to be an ISA card with I/O ports, an optional IDE controller, and an optional 34 pin floppy controller. As far as I can tell, the ports which include a game port, 16550C serial ports, and an ECP parallel port work. Not having things to plug into them though I cannot test them... > To debug DMA overrun while formatting, you could actually do > the suitable calls by hand in debug and make sure that none > of the buffers crosses a multiple of 64k linear address wise > but remember that FORMAT already is supposed to make sure to > do that automatically since May 2003. Which version do you > use and which errorlevel and exact error message does it get > with the /D option for debugging? Do other /f:size values work? > > Regards, Eric Thank you, I am using format from the freedos 1.3 live image rc2. I'm currently setting drive a to high density 1.44m in the bios but disabling onboard floppy, since the bios is expecting a usb floppy. I will try the /D flag and get back to you... _______________________________________________ > Freedos-user mailing list > Freedos-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freedos-user _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
