Den Sun, 15 Oct 2017 17:11:27 +0100 skrev smf <smf@null.net>: > On 15/10/2017 16:58, Michał Pleban wrote: > > That leaves us with a fundamental question - how exactly does MS-DOS > > know what kind of disk drives are attached to the system? We need to > > replicate this so that DOS uses correct geometry when accessing > > floppies. > > https://support.microsoft.com/en-us/help/60091/using-720k-or-1-44-mb-3-5-inch-disk-drive-with-ms-dos > > There is nothing stopping you from hacking whatever size disk into > the bios if you want, but DRIVPARM allows you to specify both drive > types and geometry > > http://www.dewassoc.com/support/msdos/drivparm.htm Also IIRC an already formatted floppy will be read correctly even if BIOS tells MS-DOS that it is another kind of drive. But this is a memory from 25 years ago so you should try it yourself before you rely on this information. Anyways have a look at FDREAD and especially FDFORMAT! -- (\_/) Copy the bunny to your mails to help (O.o) him achieve world domination. (> <) Come join the dark side. /_|_\ We have cookies. Message was sent through the cbm-hackers mailing listReceived on 2017-10-17 04:00:02
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