8272 FDC commands, release of dmklib (was Re: Reading old disks on Linux)

From: Dwight K. Elvey <dwightk.elvey_at_amd.com>
Date: Mon Oct 21 18:52:00 2002

>From: "Fred Cisin (XenoSoft)" <cisin_at_xenosoft.com>
>
>
>Another minor gotcha: machines that used WDC179x disk controller chips
>were capable of starting their first sector sooner after the index pulse
>than those using NEC 765 series. Reading those with a 765 required
>disabling ther index pulse.

Hi
 I always wondered why some PC's didn't care if the drive had a
index hole or not to read the disk. It would care for formatting
but not for read/write.
Dwight
Received on Mon Oct 21 2002 - 18:52:00 BST