Recent content by ldkraemer

Brad, Yes, you can write the t3dt16_dsk.img directly to floppy just by using the "dd" command in Debian Linux. It is a *.RAW Image (Sector Dump) and HxC or the Imagedisk utilities (IMDA, and IMDU) can easily extract the .RAW file from the *.IMD file. I typically use a batch file in DOSBOX to...

I found that Program on my Old Hard drive image. I think my Leading Edge Model M had version 2.1 and I upgraded to DOS 3.3. But, I might be mistaken. Larry

Yes, I need to know if it's just the Key Cap or do you need the switch also? Message me your address. Key CAP $3.00 Key Switch $3.00 $3.00 plus actual USPS shipping cost to your address. Larry

Frank, Any progress? Larry

The TPI is a Tandy Clone of the Tandon TM-100. It uses a SIP that is 150 OHM for the Terminator Resistor R51. RP51 = 150 OHM SIP 1 RP1-1 N MOTOR 2 RP1-2 DIRECTION 3 RP1-3 STEP 4 RP1-4 N WRITE DATA 5 RP1-5 N WRITE GATE 6 + 5.0 VDC I have extracted the pages for the TPI from the Model...

Here is a good Photo of the crossover cable that prevents users of being confused. Those IBM folks sure cleared all the confusion by doing their part. :) Notice that Pin 10 & Pin 16 are now Motor ON. Larry

The Model 4 has 256 (0x00-0xFF) Characters arranged in an 8 x 8 matrix. Attached are the "A" & "a" Characters decoded from my Excel file. The remaining Characters are decoded in the same manner. I created the attached BMP file of the Model 4's Characters, several years ago. I haven't VERIFIED...

Next, It would be interesting if you could would boot a Debian computer and give gddrescue V1.23 a try. It should allow you to read as much of the floppy as possible, and recover the missing data from other duplicate floppy's. You can also read in reverse order to retrieve more of the missing...

bburley, The TPI Floppy drives are SS/DD Floppy Drives. These were a CHEAP knockoff of the Tandon TM-100 series produced for the TRS-80 Model 4 and described in the Model 4 Service Manual. Both the Tandon and TPI drives need to have the Hinge Point of the Floppy Door verified as having...

How does this plastic part attach to the shaft that has the Cir-Clip on it? Is it molded onto the shaft or is it removable? It appears to be removable from the Parts Schematic. Do you have all the parts for a complete Hub assembly that you could Superglue back in place for a complete...

Phil, It could be a normal sound. The best thing to do is Unplug the Read Head Cable(s) and remove the two screws holding the Logic PCB. You can then swing it out of the way to access the Head Guide Rods. Wipe them down with a cotton swab dipped in Alcohol. After that I drip about 3-4 drops...

How about #77 in this list, as it has the commands in Basic. https://www.willus.com/trs80/?q=star+trek Larry

Or unplug the Cable for that Read Head and use it as a SS/DD Floppy Drive. Larry

Are you sure the Fujitsu M2551A is a 360K, 5.25" Floppy Drive. The documentation shows it as a 3.5" 720K Floppy Drive. Larry

The Leading Edge Model M did not support EGA, but there was an updated BIOS that did support EGA. I've purchased it, and used it along with two of my buddy's. The Sperry HT BIOS 4.71 does support EGA, and was the One I purchased. Ray (modem7) should have a Copy on his site, as I forwarded it...