48G Cable with HP49?

[David Drew]

Hi,
I've got a genuine HP cable for my '48. It comes with a 10 pin to 4 pin
plug, which I need for the 48. I thought that this cable would work for the
'49, since it has the ten-pin connector.

However, whenever I plug the cable into the '49, I get harsh vertical
lines, and the calculator resets. This happens both when the cable is
plugged into the computer, or whether it is disconnected. It is an ID93
calc. The 49-to-49 cable that comes with the calc works fine when used from
49 to 48.

Has anyone got any suggestions that could help me? Is it likely to be a
problem with the cable? Are the older cables differently wired to the new
ones?

Thanks in advance for any help you might be able to give me,

David Drew
david @ hydrowash com au

[John H Meyers]

"David Drew" <da...@hydrowash.com.au>:

> I've got a genuine HP cable for my '48.
> It comes with a 10 pin to 4 pin plug, which I need for the 48.
> I thought that this cable would work for the '49,
> since it has the ten-pin connector.

PC cables with the 10-pin connector molded-in
(not slipped on over a 4-pin connector)
are NO GOOD for the HP49 (or HP38):

<http://www.deja.com/getdoc.xp?AN=510934040&fmt=text>

> However, whenever I plug the cable into the '49,
> I get harsh vertical lines, and the calculator resets.

If you keep on trying, your calc may soon be all washed up ;)

-----------------------------------------------------------
With best wishes from: John H Meyers <jhme...@mum.edu>

Sent via Deja.com http://www.deja.com/
Before you buy.

[enrico]

On Fri, 14 Jan 2000, David Drew wrote:

> Hi,

> I've got a genuine HP cable for my '48. It comes with a 10 pin to 4 pin
> plug, which I need for the 48. I thought that this cable would work for the
> '49, since it has the ten-pin connector.
>

> However, whenever I plug the cable into the '49, I get harsh vertical

> lines, and the calculator resets. This happens both when the cable is
> plugged into the computer, or whether it is disconnected. It is an ID93
> calc. The 49-to-49 cable that comes with the calc works fine when used from
> 49 to 48.
>

This hp48 cable it's not good for hp49.
Look at my signature below to learn how building an inexpensive converter
from that cable to your hp49.
See also:
http://165.234.32.14
(for cable-related documents and hp49 faq)
http://www.freeweb.org/computer/enrico/hpcables.htm
(for schematics)

enrico

--
Enrico Carta (enr...@ieee.org)
Telecommunications Engineering Student, Pisa (ITALY)
Build your HP49G serial PC-Link cable by yourself!
Visit my page: http://www.freeweb.org/computer/enrico/cable49g.htm

[John H Meyers]

I wrote:

> PC cables with the 10-pin connector molded-in
> (not slipped on over a 4-pin connector)
> are NO GOOD for the HP49 (or HP38)

Joe Horn informed me that HP is now confusing matters
by making the latest HP49 cables exactly this same way,
but of course with no connections to six of the ten connector
pins which are meant for piping the LCD to an overhead projector;
therefore, be sure to X-ray any unknown cable before use,
as outward appearances are now fading as useful clues.

BTW, the calc-to-calc cable which comes with an HP49
comes with just one slip-on adapter to make one end fit an HP48.
If I had a second adapter, then that short cable would be
equally handy for connecting one HP48 with another HP48.

But does the HP48 adapter from an old HP95LX/Omni 10-pin cable
fit over the 10-pin end of a new cable? No, of course not;
HP only made things fit where it would destroy a calc,
not where everything would work just fine ;)

Wasn't anyone listening to Dave?
[maybe they misinterpreted his continual mention of "spigot" :]

[Buchan Milne]

Now if it came with a third adapter, namely 10 pin HP49G to DB9, then
you would have one cable that could connect:
HP49G to HP49G
HP49G to HP48**
HP49G to PC !!
HP48** to HP48**
HP48** to PC !!

Now wouldn't that rule ! Anyone up to making us some ?

Buchan

John H Meyers wrote:

>
> BTW, the calc-to-calc cable which comes with an HP49
> comes with just one slip-on adapter to make one end fit an HP48.
> If I had a second adapter, then that short cable would be
> equally handy for connecting one HP48 with another HP48.
>
>

> -----------------------------------------------------------
> With best wishes from: John H Meyers <jhme...@mum.edu>
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.

--
Buchan Milne B.Eng(Mech) - final year
HP48GX, HP49G, Sharp EL-556D
See Africa's first satellite at http://sunsat.ee.sun.ac.za
Get Matlab in South Africa from Control Models
(http://www.control.co.za)