Jump to content

mr_gw454's Photo


Member Since 1 Jul 2015
OFFLINE Last Active Yesterday, 8:33 PM

Posts I've Made

In Topic: Painting a peb

Thu Apr 11, 2019 2:51 PM

Hi everyone,


Resurrecting this older thread.


I have a PEB that has some stubborn stains that I can't seem to remove.  I'm wondering if anyone has successfully painted a PEB since the time of the last post.


There are some decent spray paints available and was hoping someone identified a good match for the factory colors.




In Topic: Help! Weirdness and insanity!

Fri Apr 5, 2019 9:05 AM

Hey everyone - latest update.


I was able to find another set of drives to borrow/test.  Mitsumi D502 (aka TRS-80 Color Computer FD-502).  I was able to obtain the correct molex power adapters (as these drives use a much smaller power plug).  I was also able to figure out the correct jumper settings to set the drive select properly.


I am now able to initialize disks, but these drives have there own set of problems (perhaps need cleaning, etc.).


In any case, hard to believe I had 2 drives go bad (in the same way) and can do everything but initialize disks.  Such a strange issue.  I'm now looking for an inexpensive pair of good drives as I still like to use "old-school" disks on occasion.


Thank you for everyone's feedback and help!

In Topic: Help! Weirdness and insanity!

Tue Mar 26, 2019 10:08 AM

Latest updates. 


Replaced the Disk Controller.  Same issue.  Can READ/WRITE but not initialize/format.  Same behavior for both floppy drives.  Tried numerous disk/disk brands.


Waiting for new floppy drive cable from Arcade Shopper.


Have another 5.25" drive I will try as well. 


Still hard to believe 2 drives can be bad at the same time, but will continue to troubleshoot.


Can anything else in the PEB itself cause this issue?



In Topic: TIPI Usage and Support

Wed Mar 6, 2019 9:01 AM

Someone found a new bug, until I publish the fix you will get odd errors if you create directories named 'TIPI' because currently I mistake them for the drive mapping meta-data files that go by that name.



Thank you for fixing this!  The errors I was having had me puzzled until it was officially identified. 


Thank you to Greg as well for allowing me to share a video the issue.

In Topic: Help! Weirdness and insanity!

Tue Mar 5, 2019 5:39 AM

As long as you use only 90 KiB diskettes in the system, you could try FORMAT-DISK and/or DISK-HEAD with TI Forth to see whether sectors 0 – 3 can be written.  See Chapter 5 of the TI Forth Instruction Manual (2nd LES Edition) in the TI-99/4A development resources thread.




Hi Lee.  I'm interested in this test.  I've never used Forth, but will look for it and see what happens.  Thank you!