Thanks to Bruce ELLIOTT for his articles in the TRS-80 Microcomputer News magazine !
If you want to start programming in machine language (ML) this is the paper to read.
I have grouped all the 6 article in a single pdf file :
Do you know the Sharp and Tandy Service Manuals ?
Here are they, modified to have one PDF file (OCR) per item.
All manuals are scanned from my own materials.
If you have some of the missing manuals (or not in this list) to offer (or sell) please tell me.
If you download something, please feel free to write a little comment.
 Download |  Download |
| CE-151 4Kb MISSING | CE-152 Tape MISSING |
 Download | CE-154 Wallet Not exist |
 Download | CE-156 Soft tape Not exist |
| CE-157 ROM 4Kb MISSING |  Download |
 Download | CE-160 7,8Kb MISSING |
 Download |  Download |
| CE-163 32Kb MISSING | CE-165 Writer for CE-160 MISSING |
 Download |  Download |
 Download |  Download schematics |
Here are some well known manuals :
PC2 Owner’s manual
(108 pages, english)
Printer owner’s manual
(114 pages, english)
RS232C owner’s manual
(64 pages, english)
Quick reference card
Most of you better know the Sharp system. Why ?
Maybe because Tandy/Radio shack didn’t follow Sharp along the years for this pocket computer.
Here is the Tandy system :
We know some PC-3, PC-4… but the PC-2 is still at the PC-1500 step.
I don’t know exactly why…
Someone can help me with this item ?
I already presented the PC-2.
To be precise I presented one version of the machine.
Yes, you really read “one version”, maybe the third one.
On the picture you can see lot of blue straps and a IC named “SC613128” with “A03”.
We know it’s the firmware revision. Then A03 seems to be the third.
Does someone have the first and the second ? Uh… that sounds mysterious…
I have the fourth !
As you see, no blue straps on the CPU board.
In fact it’s exactly closed to the PC-1500 evolution.
But… one moment please…
With some friends we had a really interesting discuss about Tandy and Sharp.
Like the chicken and the egg … which came first?
After reading this first article you have more questions than answers, isn’t it ?
– who have the versions one and two ???
– who can answer the chicken/egg question ???