Re: Fixing TRS-80 Model III Computer
- After removing all the RAM, cleaning the oxidation off the pins, and replacing one chip with a broken pin. The Model III now boots into BASIC.The flat interconnect cables from the serial card and floppy controller (such a poor design) are beyond salvaging.So, the task for another day is to either hard wire the boards together with wire, or install headers that use a connector and cable that can substitute.Until then, I can’t test the RAM.But, this was a good outcome for the day.I think next is to reassemble my C-64 and drill the hole for the JiffyDOS switch, and then add JiffyDOS to my 1541 Drives.Al
- On 08/16/2013 10:00 PM, Al Hartman wrote:
> After removing all the RAM, cleaning the oxidation off the pins, andExcellent! Congrats!
> replacing one chip with a broken pin. The Model III now boots into BASIC.
Dave McGuire, AK4HZ
New Kensington, PA
- After consulting with a few people on the Vintage Computer list, I decided
I'm going to remove the connectors for the flat cable, and install 4 single
row pin headers and use two cut down IDE cables (using only one row of the
female on each end to replace them.
After beating my head against the wall at Mouser and Digi-Key, and finding
another place that had them had a $14.00 minimum order (I just placed an
order with them last week.) I thought to check eBay, and got 10 pcs of a 40
pin breakaway header for $3.89 with shipping. So, I'm in business.
Someone sent me a RAM test program, so I'm set there (though I have Super
Utility which also has one). I need to repair the door on the upper drive,
and assuming the RAM and Serial board both work, the Model III will be on
In parallel, I'll get my C64c reassembled, and tackle the JiffyDOS ROMs in
my 1541 drives.
After that, back to getting a working E/I for my "new" Model I. And then,
getting my original Model I working.
- Yes! Nice going.
--- In firstname.lastname@example.org, Dave McGuire <Mcguire@...> wrote:
> On 08/16/2013 10:00 PM, Al Hartman wrote:
> > After removing all the RAM, cleaning the oxidation off the pins, and
> > replacing one chip with a broken pin. The Model III now boots into BASIC.
> Excellent! Congrats!
> Dave McGuire, AK4HZ
> New Kensington, PA