17 Mar
2002
17 Mar
'02
3:01 p.m.
On Sun, 17 Mar 2002, Doc wrote:
On Sun, 17 Mar 2002, Fred Cisin (XenoSoft) wrote:
No, dd doesn't care in the slightest what the file structure is. I've
imaged disks with filesystems totally unknown to Linux with dd.
Blocksize is sometimes an issue, but I've found that setting blocksize
to "1" fixes that just fine.
Or, if I had a copy of 22disk (yeah, I'll google in a minute) I
suppose I could boot to DOS and do that. Does 22disk understand dd
images? (Andreas already cut to the chase & imaged a couple of trial
runs for me)
No, 22Disk does not understand dd images, TeleDisk images, .dsk images,
or most any other kind. It is only capable of reading, writing, and
formatting most CP/M disk formats. That is to say, it is capable of
formatting a DD blank as an Altos DSQD diskand and it is also capable of
writing available files to that disk. With a modification to the disk
definition and an image file of the boot track, it is possible to make
the new disk bootable also. This assumes that either the whole of CP/M
is on the boot track, or that any needed loaders and CPM.SYS or MPM.SYS
are written to the data area.
- don
On Sun, 17 Mar 2002, Joe wrote:
Erck. That distant splash you just heard was the sound of Doc hitting
the bottom of the well. We passed the "All Greek To Me" phase awhile
back.
So. The "fd0h720" device on my Debian Linux machine is defined as
"/dev/fd0h720 5.25" 720K in a 1200K drive"
Will the 1.2M drive write reliable QD disks? Note that I said "write
reliable" not "reliably write". Several tries is no biggie.
That MIGHT work but I don't recommend it.
The 1.2M drive has
compatibility problesm with the 360k drives and it has the sme compatility
problems with the QD drive.
Actually, it is NOT the sme compatility, (nor the same compatability :-)
problems. The big problem with 360K in 1.2M is the head width. THAT is
OK for "QD". But there can be some problems sometimes with trying to do
"QD" with 1.2M, since sometimes it can be difficult to get it to switch
density without also switching into "double-stepping" mode. Correct spelling. 360K (AND "QD") is
300 Oerstedts; 1.2M is 600
Oerstedts.
Uh. OK. In dumbass terms, does that mean "no go"?
That
should work as long as the PC understands the file structure. You
Pretty EXTREME
assumption! Not much besides CP/M,MP/M understands CP/M
file system and DIRectory structure.
> may need to use 22disk or something similar that understands the Altos
> structure. Doc