26 Feb
2003
26 Feb
'03
3:37 p.m.
I only cut my teeth on these back in the 70s... I kept boxes
of disks from that era.
Thanks to Eric and you for chiming in with some information.
The conversation is reminding me of what I used to know off the
top of my head...
The connector is probably a DC37. I guess I didn't pay enough
attention to it when I was looking earlier. If someone has a
file available that would be great. I can spend the time to ohm
it out, but I had hoped the doc existed in a ready format.
Erir reminded me of the SD controller on the I/O board and I
will connect a drive to that one tomorrow and see if I can at
least kluge something together just to test the SD section. I
know the rest of the system is fine.
I have the Ball Brothers display doc if anyone is interested
and I am in the process of picking up some more of the hardware
data.
A copy of Kermit for both SD Intel and SD CP/M would probably
be my best bet. Can I send disks to you Dave to get copies and
include money for costs?
Let me know. Thanks.
regards, Steve
--- Original Message ---
From: Dave Mabry <dmabry(a)mich.com>
To: cctalk(a)classiccmp.org
Date: 2/26/03 5:57:31 PM
Oh boy! Hey Joe! Another one!
Hi Steve,
Welcome to the Intel Development System adiction.
If you have a double density drive in your 225, that would normally
mean
you have the double density controller board set
plugged into
the
Multibus and cabled internally to the built-in Shugart
801 drive.
While
the drive is capable of reading/writing single density,
the
double
density boardset from Intel is NOT. For the MDS Intel
only
made
single-density boardsets and double-density boardsets.
There
wasn't
anything that Intel made, supported under ISIS-II, that
could
read both
densities on one drive. It was possible to have both
single
and double
density drives in one MDS, but they were separate
drives and
separate
controllers.
Check again on the external connector. I seem to remember it
being 37
pin D-type connector. But I can check again. I have
the documentation
for what signals are where and can type them in, but
I'm hoping
that
someone (Tony, Joe?) might already have that in a
file.
I can help you with software if you need anything for ISIS-II
and/or
CPM-80 for that machine. I have Kermit configured so
that makes
it easy
to transfer files to/from a PC and then send them in
e-mails.
Let me know what you might want.
Dave
Steve Thatcher wrote:
> Hi all, I got my Intel MDS225 working today, but I only have
> a single double density drive on it. I seem to recall that
it
> would read single density, but you accessed by a
different
drive
> specifier. I can't seem to find one bit of
documentation on
the
> ISIS command at home. Does anyone have a summary
page they
could
> scan and send?
>
> I am also looking for the 50 pin connection wiring so I can
connect
a drive
externally.
It was fun booting up ISIS-II version 4.2 and seeing the prompt
come up. I also had a CP/M 2.2 version that booted perfectly!
best regards, Steve Thatcher
.
--
Dave Mabry dmabry(a)mich.com
Dossin Museum Underwater Research Team
NACD #2093