23 Jan
2013
23 Jan
'13
6:45 p.m.
On 1/23/13 1:11 PM, Chuck Guzis wrote:
On 01/23/2013 11:24 AM, Dave Land wrote:
I'm slowly but surely picking up bits and pieces of information here and, yes,
Dave Maslin's copy has a boatload of formats compared to the stock one I
downloaded the other day, although he may not have registered them with you.
But alas, his version wouldn't write to or read from my drive either.
My PC does write FM but not MFM according to Dunfield's Image Disk,
but that may just be due to me not having something set right (i.e. interleave
or something else.) My floppy controller chip WAS in his list of 'tested
controllers'... All I get when it tries to read or write, is 'sector not
found'
and when I tried to format a disc, it got to about track 50 and started gen-
erating errors all over the place. With Image Disk, I can format a disc, write
a disk image to it, and the system will actually read it when I hook everything
back up. Maybe I need to find a PC with a little bit older FDD controller and
try again?My 820-II was one of the models that had the 8" DSDD floppy and a
10 mb. hard disk in the same enclosure. It's got the extra slot in the monitor/
cpu for what I would assume is for a 16/8 card, but nothing there. Just the stock
64K of RAM.
Here's what I've been using for settings for formatting and writing
disk images.
Tracks 77
Sides 2
Interleave 1:1
Sectors per track 26
Bytes per sector 256
FM @ 500kbps
If I could get 22disk to actually play nice with this thing, I'd definitely
buy a license for it. :))
Dave Land
Land Computer Service
On 1/23/13 11:00 AM, Fred Cisin wrote:
That's odd--I don't remember ever adding an 8" 820-II format to
22Disk--lots of 820-II 5.25" formats, though. As far as I can tell, the
only 8" Xerox format is for the 16/8 system. And Don got his 22Disk
from me--and he was a registered user. We still sell 22Disk, though
not in great numbers (sold 4 licenses in December).
So now we know where the rumors about 22Disk not working with 8" drives
comes from...
Will your 820-II read type A1 disks? If your PC can write
single-density (FM) you might start with that.
But then, what do I know?
--Chuck On Tue, 22 Jan 2013, Dave Land wrote:
The version I had didn't have the necessary info in the diskdefs file for
the 8" drive on the 820-II, but like I mentioned earlier, I got a diskdefs
file that has that, and a lot more, from the Dave Maslin archive. Going to
try tonight if I have time to work with it. I've gotten successful copies
already via Dave Dunfield's Image Disk program so I know it works somewhat. I actually have the .HEX files for the machine,
but I tried to get them
transferred with 22disk, and it doesn't seem to like 8" drives too much
(ver. 1.42 or 1.44).
What kind of problems?
If 22disk has difficulties with your 8" drives, then whatever THAT
problem is may need to be dealt with for any other software attempts.