28 Dec
2010
28 Dec
'10
6:26 p.m.
HP did everything it could to shoot itself in the foot. After promising
compatibility among the 100-Series machines, the floppy format produced
by the 9114 driven by the HP110 Portable or the Portable Plus was
different from the format produced by the HP150. There were clever
format programs and device driver tricks to get around some of these
incompatibilities as well as to allow the PPlus to make and use 3.5"
floppies that could also be read and written by regular DOS machines.
Sometimes I find it amazing that HP has survived!
Jim
On 12/28/2010 1:47 PM, Tony Duell wrote:
On 27 Dec 2010
at 14:45, Fred Cisin wrote:
Not really, this ia a drive
unit and not system parameter.
An HP150-II will use the 9121 signle-sided drive, where it formats it to
70 cylinders (and probably gives you 66 of them). I think an HP150 can
use the later double-sided drives like the 9122 (and will format them to
77 cylinders), but it may need a BIOS ROM upgrade amd/or a later version
of MS-DOS.
-tony I saw multiple DIFFERENT upper limits (66 and 70)
on discs (HP refused
to call them "disks") that were supposedly the same format.
Indeed, the
HP150 Series II floppies used 77 cylinders for data.