H89 disk formats?

From: Dwight K. Elvey <dwightk.elvey_at_amd.com>
Date: Wed Apr 30 18:18:00 2003

>From: "Don Maslin" <donm_at_cts.com>
>
>On Tue, 29 Apr 2003, Dwight K. Elvey wrote:
>
>> Hi
>> I've been looking at a pile of disk that I'd
>> collected over a period of years. Most are the
>> typical 10 hard sectored disk, formatted in the
>> same way as HDOS uses. In the pile, I found a
>> few that are marked "format 96". These have the
>> 10 plus index holes but they don't seem to be
>> the normal format. When I attempt to read them,
>> I can only read the first sector. All of the rest
>> don't seem to read. Does anyone know what this
>> was all about?
>> Dwight
>
>Dwight, I would assume that they were done on a 96tpi
>floppy drive.
> - don
>

Hi Don
 That is what I figured. I've been working on my serial
bootstrap and transfer program. I'm able to read and
write an image to the H89 but I'm still having issues
getting the formatting to work. I copied some old
code that I have in the Fig-Forth that I did but it
is still missing something. I even went back and ran
the Forth FORMAT and it works fine. I suspect there is
some other initialization that I'm missing. I looked at
one stretch of code and there is an operation that should
always hang. Can't figure why the original works. It
may be something connected to the timer interrupt that
isn't normally there. I wish I'd made good notes when
I did the original but this was one of my first computer
projects, after working on my Poly88, and brain rot
is now catching up with me.
 Once I get the format working, I can work on cleaning
up the user interface. Looking at the 96 stuff is a
little later on the list.
Dwight
Received on Wed Apr 30 2003 - 18:18:00 BST