tm@polari.UUCP (Toshi Morita) (04/11/90)
Someone mentioned something about having to step two "hard" tracks to get to the next data track... I think the original Apple Disk IIs were stripped down Shugart SA390s - it's not "Apple's fault" that Disk IIs couldn't support 80 tracks, it's "Shugart's fault". The SA390 only supports 35 tracks...the SA400 (its descendent) supports 40 tracks, however. On the subject of quarter and half-tracks: It's possible to use 80 track drives on the Apple II (and use 80 tracks), but I doubt that you could use quarter-tracking to get 160 tracks on a disk. The head gap isn't small enough to record quarter tracks even on an 80 tpi drive, as far as I know... Toshi Morita Usenet: tm@polari