Thank you Don for the “Pocket Computer Newsletter” archives !
I subscribed to Pocket Computer Newsletter in 1982 and was able to get back
issues of 1981.
I was interested in Machine Language for the PC1500.
In 1982 PCN was the only information available.
The Sharp Technical Reference Manual was not yet out.
TRS80 Microcomputer News started revealing the mnemonic codes in March 1983.
The last issue of each year of PCN has an index.
For those that want to learn PC1500 ML, search the index for articles by
Thanks to the hard work of Norlin Rober, PCN had the first info on ML
programming the PC 1500.
They called the command set Rober Mnemonics.
Norlin Rober provided the first PC1500 disassembler program in PCN 1982
Special Edition issue.
This was written in BASIC.
He later offered it written in ML, named LMD 2.0
A must have program!
In 1983 PCN had a series of issues called “Machine Language Programming the
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.
With our printers we printed hundreds of meters listings.
Everyone remembers So these little paper rolls?
Okay, did you know these 3 models?
– The Tandy box with its blue color which contains 6 rolls
– Sharp box ROL-P-38 containing 5 rolls
– The box unmarked ROL-P-38, which also contains 5 rolls
But look a little closer these rolls …
To the right we have the Sharp left and the Tandy and unbranded.
The length of paper appears to be identical.
But there are two conspicuous differences:
– The color of the paper.
– The red band indicates the end of paper.
There really is a difference in quality!
Do you know any other packaging for these rolls?
If this is the case thank you send me a message.
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 ???