geertj@nlgvax.UUCP (Geert Jan de Groot) (02/01/89)
Hello, Some time ago, I added a 3.5 inch drive to my home-brew CP/M system. After some testing, it works, so it's time to add the thing in the BIOS. I wonder if there is some standard for 3.5 inch (yes, I know, there is none officially, as my system uses yet-another-format on 5.25 inch :-), but would like to know if there is something spread like the OSBORNE-1 format, which seems to be a common standard on 5.25 inch. So, what format is common among 3.5 inch? I would like to know about physical sector size, sector numbers, soft/hardware skew, way of selecting the next track (next cylinder/other side/interleaved/...), DPB, and other things one needs when hacking the BIOS. Thanks in advance for any responses. Geert Jan -.-.- --... ...-- -.. . .--. . .---- .... --.. --. .-.-. Geert Jan de Groot, Email: geertj@nlgvax.pcg.philips.nl Philips Research Laboratories, Packet: PE1HZG @ PI8ZAA Project Centre Geldrop, AMPRNET: [44.137.24.3] Building XR, Room 15, Willem Alexanderlaan 7B, "When in doubt, 5664 AN Geldrop, The Netherlands. tune for minimum smoke phone: +31 40 892204 and then consult a reference" [Standard disclaimers apply] -(Found in a manual)