EPSON EHT-10

[Jerome Vernet]

Hi,

I just bought an Epson EHT-10 on eBay. It's a small Handheld device,
with a little LCD screen and numeric keyboard, running CP/M 2.2. But I
cannot find a lot of information on Internet about it.

Does anybody know things about it ? Manual, techs refs, developpements
tool -seems that it need a developpement cartridge-.

Thanks for any help.

Jerome

[Mr Emmanuel Roche, France]

I hope that it is a joke...

I just made a Google search and found:

http://happy.emu.id.au/neilp/gps/

containing some development programs for the Epson EHT-10...

Yours Sincerely,
Mr. Emmanuel Roche, France

[Mr Emmanuel Roche, France]

1986 for the first time, the idea of directly entering orders during
the ordering discussion became a reality when Epson presented the
first touchscreen computer display, the Epson EHT-10.

64 KB memory, 192 KB RAM, 4 MHz speed and the now-obsolete operating
system CP/M (the forerunner of MS-DOS) were the basic parameters for
managing the orders of our first customer ESPRIT. The orders were
printed out using the robust Diconix printer by Kodak.

I found a 9-pages article using it:

Title: Randomized controlled pilot trial of a hand-held patient-
oriented, insulin regimen optimizer

Author: R. R. Holman, A. D. Smale, E. Pemberton et al.

Publication: Medical Informatics & The Internet In Medicine

Publisher: Informa Healthcare

Date: Jan 10, 1996

"Informatics for Health and Social Care", Volume 21, Issue 4 October
1996 , pages 317 - 326

Also, a Californian University has severals:

http://projects.crustal.ucsb.edu/scec/pbic/equip/inventory.html

So, there should be students knowing how to use them...

Farther, on the same Web site, I found:

http://projects.crustal.ucsb.edu/scec/pbic/equip/man/equip_man.html

The user interface to the DAS is performed using an external terminal
of some kind. The most popular currently is the HP 100LX palmtop
computer. The PBIC also has several Zeos style palmtop computers. In
the past the Epson EHT-10 was widely used. The palmtop computers used
today with the FSC software can display more information at one time
than the older, more cumbersome EHTs.

This will be all.

[Jerome Vernet]

Mr Emmanuel Roche, France a écrit :

If you google around a little more, you will find also:

<http://pagesperso-orange.fr/jerome.vernet/specs/EPSON_EHT-10.html>

This page I made to summarize all the information I was able to find
this week, and the page you gave me above is the only interesting one.

I need more information, documentation, etc for example, without the dev
cartridge, what can I do ?

Jerome

[Jerome Vernet]

Mr Emmanuel Roche, France a écrit :

> 1986 for the first time, the idea of directly entering orders during
> the ordering discussion became a reality when Epson presented the
> first touchscreen computer display, the Epson EHT-10.

Yes, I found plenty of these applications, running on EHT-10. But no doc
about the EHT-10 himself.

Jerome

[Mr Emmanuel Roche, France]

Jerome Vernet wrote:

> I need more information, documentation, etc for example, without the dev
> cartridge, what can I do ?

It is a Z-80 computer. The question is: Does it have CP/M in ROM? If
so, once you find how to boot it, you are autonomous, like any other
computer running under an Operating System.

Another question is: How do you type command lines?

A computer is a freak half hardware and half software.

I suggest showing this Epson EHT-10 to a good electronician, who
started with 8-bits microcomputers 25 years ago.

If you are in Paris, I know someone.

[Jerome Vernet]

Mr Emmanuel Roche, France a écrit :

> Jerome Vernet wrote:
>
>> I need more information, documentation, etc for example, without the dev
>> cartridge, what can I do ?
>
> It is a Z-80 computer. The question is: Does it have CP/M in ROM? If
> so, once you find how to boot it, you are autonomous, like any other
> computer running under an Operating System.
>

It's said to have CPM in rom (that why I post here). But as for other
such device -like Espon HX20, Tandy M100, etc-, CP/M is hiden. At boot,
I can select a config menu, or a LOAD screen, where the device wait for
something coming from RS232. I do not have access to the ROM Disk (I
know it's here, because it's like other Epson systeme, PX4 and PX8).

There is a file system in it (in RAM, as A:), and ROM socket module was
said to be accessible as drive B:.

> Another question is: How do you type command lines?

As there is no prompt, I can't. It may exist a trick to get the prompt,
but cannot find it.

>
> A computer is a freak half hardware and half software.
>
> I suggest showing this Epson EHT-10 to a good electronician, who
> started with 8-bits microcomputers 25 years ago.
>
> If you are in Paris, I know someone.

I'm in Paris, it's an interesting way.

Regards, Jerome

[Jerome Vernet]

Some information collected, and pictures from my EHT:

<http://pagesperso-orange.fr/jerome.vernet/specs/EPSON_EHT-10.html>

Jerome

[jimau...@gmail.com]

I used to provide technical support for this kit in the UK 1987 - 1990 if you are still interested!

[Jerome Vernet]

Le 20/07/14 13:53, jimau...@gmail.com a �crit :

It's a very very old post ! I still have this EHT (with also an EHT11).
There is no doc on Internet... How can we put something in these pocket ??

Jerome

[vermeul...@gmail.com]

So there are other people with an EHT-10! Intriguing little CP/M handheld based on the Epson PX-4 design.

Here are PDFs of the System Development Guide and Development Tools User Guide that came with my EHT-10:
https://drive.google.com/file/d/0B_jM3_1AFMbMVFpaMllJdTZyNlE/edit?usp=sharing

Regards,

Oscar.

[Fred Jan Kraan]

Thanks for the files. I did merged the two halfs of each document, with
the even page in proper order, but I consider the files are too large
for my Epson documentation pages. Maybe if I can make them B&W without
quality loss...

The result sofat is available on request.
>
> Regards,
>
> Oscar.
>
Greetings,

Fred Jan