View Full Version : Morrow MD-2 Help Thread

May 20th, 2017, 01:53 PM

I've got a Morrow MD-2 with the MDT-20 terminal (I think it's that) and keyboard.

I'd like to get this thing back up and running again.

When turned on, nothing happens for a few seconds, then it beeps and it asks for a CP/M disk.

No CP/M disk :(
Terminal has diagonal scan lines. I've had this on an Apple RGB and it was horizontal sync.

Does anyone know where I can get a CP/M disk for this, along with programs?
And what about the diagonal lines?

Thank you!

May 22nd, 2017, 03:05 AM
There are TD0 images of system disks in the Don Maslin archive.
You will need to image them to disk on an older pc with TeleDisk

As far as the terminal, I think since it's a serial type that the video sync would be internal to the display.
Might even be an internal horizontal frequency adjustment? A manual is also on Dunfield's site but only covers operation, not schematics or adjustments.

Hope this helps,

Larry G

May 22nd, 2017, 03:16 AM




May 22nd, 2017, 01:23 PM
Here is the information you need:



RAWDISK: (Interesting!)

CP/M Versions:

What type Floppy Drives do you have? SS/DD, DS.DD?

Interested in a 3.5" on the Morrow?

Want cpmtools & libdsk Definitions for Morrow?
Versions 2.21 of cpmtools and Version 1.5.4 of libdsk allow accessing .TD0 and .IMD images directly. It works good thanks
To John Elliott. http://www.seasip.info/Unix/LibDsk/


May 22nd, 2017, 01:37 PM
Thank you for all these links everyone! I am currently working with Larry right now on getting some disks made...

Eventually I am going to make my own and will need some help then. Ive got a 98SE machine coming soon, and from what Ive heard will need DOS and a 5.25 drive.

I THINK I have the SS drives, not sure... I had the SW200 drives I think they were called.

May 27th, 2017, 02:08 PM
Hi again,

Larry got me some disks made! :)

However, when I insert them into drive A, I get that the drive is not ready. Yes, they are inserted correctly, and yes the latch is closed. I took apart the MD again to check it out, and I noticed that the belt for A was half lying on the logic board. I took the drive out and the belt is at least an inch too long. The motor has no chance on spinning it with the belt this big. B is pretty bad too.

Would this be causing the drive not ready? Also, where can I get new belts OR is there a method to cut them back to length or something?

May 30th, 2017, 01:05 PM
Hmm, wasn't there a thread on these forums about putting floppy drive belts into boiling (or hot) water to resurrect them? Or was that on the cc-tech mailing list? Try to search the net for it.

May 30th, 2017, 01:16 PM
Right now I'm talking with someone who can make me a new one, but I'll search about that now.

Al Kossow
May 30th, 2017, 02:05 PM
Hmm, wasn't there a thread on these forums about putting floppy drive belts into boiling (or hot) water to resurrect them? Or was that on the cc-tech mailing list? Try to search the net for it.

that was DC-xxx series cartridge tape tension bands, and it really doesn't work that well. They do shrink, but they break under tension.

May 30th, 2017, 02:15 PM
Yes a bad belt will cause a "not ready". You might be able to fit an old VCR belt to the job. You'll have to get the exact length, which can be had by taking a piece of string to measure.

One of many places selling flat belts (http://www.smcelectronics.com/vcrrep.htm)

May 31st, 2017, 09:12 AM
Thanks guys for the help. Can't wait to get it running! Again, talking with someone now on getting some new ones made. I'll update if it happens.