PC-1500 28Kb – Part 1

Lukas told me about his gift that there will be a 28Kb PC-1500.
This was a good news !
But this is more than a good news.
Lets me present this updated machine.

Opening the CE-150 box shows us some nice things.
Do you see what i mean ? Examine this picture carefully…
PC-1500_28Kb_001

First there is a sticker “28K”. This means that the memory size is 28Kb. It’s the maximum reachable on this pocket because of the display addressing method.
PC-1500_28Kb_002
Let’s open the machine…

Here is it :
PC-1500_28Kb_010
This extension it made of 13 x 6116 ICs and present a total amount of 26KB of memory.
It’s a very professional board. You can see where the RAM pins are placed ? Simply on the holes between sides. Well done guys !
This board is named “DF1SE PC 1503”. (If you know more about it then use the contact form to tell it to me.)
PC-1500_28Kb_011 PC-1500_28Kb_012

Second, there is a switch on the PC-1500 side :
PC-1500_28Kb_005

Do you know why ?
The LH5801 microprocessor is driven by a 2,6Mhz oscillator.
In 1982 it was fast ! In 1984 it was slow ! lol
This button switch between the 2,6Mhz and a new 5Mhz oscillator. Yes, the twice !!!
Uh… this has some back effects to the real time clock… but the speed is here !
PC-1500_28Kb_007
PC-1500_28Kb_008

The printer case and the pocket pouch have being modified for the switch.
PC-1500_28Kb_003 PC-1500_28Kb_006

Third, there is a very nice update of the printer’s door.
A little black plastic strap help the opening.
PC-1500_28Kb_013
PC-1500_28Kb_014

Next time i will explain something very particular on this PC-1500.
Do you have an idea ???

Lukas ZELLER : as the author of a magazine

I’m happy to present here a swiss made magazine : Tips & Knife.

Lukas ZELLER and Stephan PASCHEDAG where enough interested by the Sharp PC-1500 to write a short magazine for fans.
This magazine written in German language was known in Germany and France. Xavier FOJUD sent me a sample.
My ones come from Holland and the interesting thing it that the first volume have a sticker “URS RIBI” (PC-1500 Clubzeitung).

Tips_Knife_Teil1
Download
Tips_Knife_Teil2
Download
Tips_Knife_Basic-Befehle
Download
Tips_Knife_Hardware-Tips
Download

Frank C. ODDS : my favorite printer for the Sharp PC-1500

Frank C. ODDS presents his favorite printer for the Sharp PC-1500 : the MCP-40.

Printer04a

The MCP-40 printer — identical, it seems, to another model called “Oric 1” — was a four-colour printer plotter that used a rotating “bullet chamber” device identical to the one in the Sharp CE-150. But the MCP-40 printed on paper rolls 114 mm wide, thus offering larger results than the “bus ticket” output of the CE-150.

Printer01a
Printer03a
Printer02a

The MCP-40 connected to computers via a 36-pin parallel port connector that reduced to a 25-pin DIN connection at the computer. It connected directly to the electricity mains. It therefore functioned more like a full-sized printer than a pocket computer add-on. The printer connected to the PC-1500 via the parallel port on the CE-158 serial/parallel interface.

Printer06a

For printing full-sized text output from the PC-1500, a serial or parallel port connection to the dot matrix, tractor feed type of printer that was widely used in the 1980s. But the MCP-40 came into its own for graphic printing: the four-colour capability, together with the ability to draw smooth lines in any direction, meant it was ideal for plotting graphs and drawing computer-generated diagrams. The MCP-40 sold for a relatively cheap price, making it a great value add-on for a Sharp PC-1500 set-up.

Printer05a
Printer07a

And here is the self test on video :

If you want to learn more here is the Operation manual :
MCP-40 user manual_Page_01
Download

Thank you Frank for sharing your experience with us.

The swiss adventure : Lukas ZELLER

As you understand my research to tell the story of the PC-1500 does not have borders.
I have many things from Germany. And my previous donor, Xavier Fojud brought me a link between France, Germany and Switzerland. In the latter I already had some contacts but the documents he had generously offered allowed me to connect some names.

Last week I received a gift of Lukas ZELLER.
He has been active Swiss side of the PC-1500 with his diary “Tips & Knife” and his assembler ZASM-S.
So here is his generous gift:

Lukas_Zeller

– PC-1500 Expanded to 28KB of RAM + switch to activate a 4Mhz quartz.
– PC-1600 the first version with integrated memory expansion to reach 96Kb.
– CE-150 Printer
– Sharp software modules CE-510A, 502A and 505A
– CE-155 modules whose components were removed to tinker extension of PC-1600
– CE-162E interface
– PC-1500 Technical reference manual
– PC-1600 Service Manual version SME1
– 3 user manuals for software that I’m trying to get.
– 2 prototype cards for male connector.
– ZAMS-S user manual developed by Lukas.

These PC-1500 and PC-1600 contain something not trivial that I will reveal later here in the series of articles on Lukas Zeller.

A huge thank you to Lukas!

EASI-THOUGHT program from Frank C. Odds and Ian Traynor (Minimicro)

We have seen a lot from our German friends and will soon see things from our Swiss friends. But I want to salute some English friends who have not been idle!

A couple, Ian and the late Ruth Traynor, decided to found the MINIMICRO company to sell Sharp pocket computers and sell their software.
One man, Frank C. Odds, who published in magazines a few programs for the PC-1500.
The combination of these three people was a turning point in the English Sharp adventure.

Ian and Frank were kind enough to share the fruit of those years and allow me to publish here their programs. Feel free to leave your thanks and comments.

They now offer their EASI-THOUGHT software
EASI-THOUGHT-Photo

Ian tells us about the Minimicro company :

My hobby business, Minimicro, was a software developer and publisher, and I distributed my software through two main outlets – Elkan Electronics, based in Lancashire, and another company, whose name I forget, run by a Canadian.

Initially, I started writing my own software for the Sharp PC-1211, the first hand-held computer programmable in BASIC. I developed a spreadsheet-type program which I crammed into the 1.2k memory. This was EASI-Calc, which made its way onto other Sharp handheld computers, including the PC-1500 and PC-1500A.

When the PC-1500 took off, I found other software authors who developed programs and released them through Minimicro – because I had the outlet channels which they lacked. I payed them a royalty on each one sold. Sharp Electronics used to send me a free computer each time they released a new model, and I did develop software from some of their later machines. But the PC-1500 remained the main machine that I and my team developed software for. Frank Odds, a medical lecturer, was one of my main programmers.

Frank tells us:

The origins of Easi-Thought

I have to be honest. I no longer remember how Easi-Thought came about! From the mid-1970s I had enjoyed teaching myself to program computers in BASIC. But to do this required access to a mainframe computer, which limited the time I could spend. I worked at the University of Leicester, in a department with some professional computer users, but my own exposure to programming remained for some years dependent on finding quiet moments on the local main-frame terminal.

Then, in 1980, the Sharp PC-1211 arrived on the market. This was nominally a pocket calculator, but it allowed programming in BASIC — the first pocketable device that supported a “proper” computer language. I had no hesitation in buying one within weeks of its arrival in the shops. Its portability meant I could amuse myself by writing programs at any free moment, particularly when travelling.

The intellectual challenge with the PC-1211 was to try to push the device beyond its obvious limits. Then the Sharp PC-1500 came on the market in 1982. Wow! The PC-1500, with its brilliant miniature, 4-colour printer, put the PC-1211 in the shade. From 1982 to 1985, I must have spent almost every spare moment playing and programming my PC-1500. (Over that same period my three children were born; they probably had my time through the early evenings, and PC-1500 got the rest of my attention.

By the time Sharp released the manual on machine-code programming for the PC-1500 I probably carried all the machine’s BASIC commands in my head. The idea of learning assembler/machine-code created yet another new challenge. Over the years, I had often had PC-1500 programs published in the UK users’ magazine, Status 1500, one of whose readers was Ian Traynor, in York. Ian was an entrepreneur, who sold several items of software for the PC-1500, all named “Easi-something” (Easi-Note, Easi-Trend and Easi-One! were among Ian’s products).

Ian contacted me early in 1985 with the idea I might write a thought processor —I’m pretty sure I didn’t first contact him. The “thought processor” concept, relatively new at the time, was similar to that of a word processor, but instead of focussing on fonts and layouts, a thought processor lets its user jot down ideas on different levels, which can later be associated to create a coherent written text. If you use Microsoft Word, its “outlining” view does exactly the same thing as a thought processor.

Because I love a challenge, I must have thrown myself rather obsessively into writing Easi-Thought. Looking at the handwritten copy of the program details I have kept over the years it looks as if I wrote everything straight out of my head, with only occasional corrections and almost no annotations. I doubt things were really anywhere near so fluent; my waste bin probably contained many discarded, failed drafts of the modules. But what emerged worked. Version 2, the one listed in the notes, will have been a modification written in response to comments and critiques from Ian Traynor. There is an indication of version 3, which probably corrected a few remaining bugs.

I have no idea how many copies of Easi-Thought were ever sold. For what it’s worth, I never used the program myself! There were two reasons for this. The first was that, by 1985, when Easi-Thought was released, the Amstrad PCW with its “Locoscript” word processor had become available. The power of the PCW word processor simply outclassed anything the PC-1500 could handle. The second reason was that Ian Traynor persuaded me to write a proper word processor, but for the PC-1350, which had a four-line display, rather than the PC-1500. I remember the pocket word processor project took huge amounts of my free time: I think I spent about 4–5 months on the project. By the time Easi-Text-1350 was released, in 1986, my PC-1211 and PC-1500 had become incidental features of my life; my computing had shifted to the growing array of superb desktop machines that were much faster and more adaptable.

Although Easi-Thought (and Easi-Text 1350) were marketed as commercial products, and took countless hours of my spare time to create, they never became a source of income. I no longer remember any of the details, but have a warm recollection of the satisfaction of figuring out how to make all the functions work by programming at the lowest level any computer can offer.

It was sold by minimicro:
EASI-THOUGHT-Minimicro
and the Elkan company:
EASI-THOUGHT-ELKAN
Here is the sales brochure:
EASI-THOUGHT-Advert
Download full advert
and the user manual:
EASI-THOUGHT-Cover
Download the user manual

The software consists of two .wav file to load.

EASI-THOUGHT-1(Mc).wav Download
This part is the machine language program.
It is loaded at address &4000 but the bootstrap program moves it to &7660

Here are Frank’s handwritten notes:
Easi-Thought program data
Download Frank original program
And program content source in the Wav file:
EASI-THOUGHT-1(Mc).txt

EASI-THOUGHT-2(Low).wav Download
This is the Basic part.
Here is the content of the program:
EASI-THOUGHT-2(Bas).txt

Easi-Thought_Tape

Please follow installation instructions from the user manual.
Well, now you have a word processor such that conceived in the early 80s.
Stay tuned…

The Swiss adventure continue…

We started the story with the Swiss company TRAMsoft.
Now we continue with other names: Lukas Zeller, Stephan Paschedag Urs Ribi, Marco Feusi …

By sorting a stack of papers I found a very interesting magazine written in German by Lukas Zeller and Stephan Paschedag. On the first volume there was a sticker with the name Urs Ribi.

Oh, do you remember the generous gift from Xavier Fojug?
There were two magazines (one blue and one orange) named ClubZeitung from Marco Feusi.
And there were tapes … one of which was made ​​by Urs Ribi.

After some internet research I was able to get more information.
We will see very soon that I could find.

Stay tuned …

Magazine : Sharp PC-1500 Zeitung (Part 2)

Here is the last part of the PC-1500 Zeitung magazines.
Do you see the title change ? It’s lighter.

My german friend will remember lot of the 80,s.
And for the other, and me, we will use some online translator 🙂

In the last magazine you’ll find the advert of an english company : Minimicro. I’ll tell you more about it next.

Thanks again to Xavier Fojud for these magazines !


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