6 Oct
2012
6 Oct
'12
9:38 a.m.
On 10/06/2012 08:53 AM, Fred Cisin wrote:
That MIGHT even work to redefine a 1.2M drive as being
an 8"!
(/F:2 used to work to declare a 720K 5.25" drive as being a 3.5"!)
Well, not exactly on the Japanese DOS-V variant of MS-DOS. I suspect
that the single-density operations are only valid on DOS-V because the
standard PC BIOS interface is very different from that embodied in PC98.
Would the /F:4 option change anything of 1.2M format
other than number of
cylinders? (77 instead of 80) Single or double sided?
If you're talking about double-density, it's easy enough to find out.
I encountered many STRANGE behaviors with DRIVPARM.
For example, it worked fine with either PC-DOS 3.20 on a generic clone,
but with REAL IBM 5170 ROMs, it produced a message about unrecognizable
CONFIG.SYS command!
At that time, I was not aware of the /I option; I wonder if that would
have made a difference?
Well, recall that there was an odd behavior in at least one version of
DOS prior to 3.3 that required one to prefix DRIVPARM with a series of
01 (Control-A) characters to be recognized. Was it PC-DOS? I don't recall.
--Chuck