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Differences between HP 48G, 48G+ and 48GX

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Chris

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Jan 9, 2003, 1:52:31 PM1/9/03
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Hello everybody
can someone shortly explain the differences between these three Calcs?

thanks!
Chris

Raymond Hellstern

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Jan 9, 2003, 1:57:33 PM1/9/03
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"Chris" <baumannc...@hotmail.com> schrieb im Newsbeitrag
news:44d281a6.0301...@posting.google.com...

> Hello everybody
> can someone shortly explain the differences between these three Calcs?
>
I think a data sheet and a comparison of those calcs is available on
www.hpcalc.org

Raymond


R Lion

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Jan 9, 2003, 2:47:11 PM1/9/03
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48G: 32Kb
48G+: 128Kb
48GX: 128Kb + two eXpansion ports (up to 128Kb in the first, up to 4MB in
the second)

Raul (explaining shortly ;-)


"Chris" <baumannc...@hotmail.com> escribió en el mensaje
news:44d281a6.0301...@posting.google.com...

Jean-Yves Avenardj

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Jan 10, 2003, 2:26:20 AM1/10/03
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Hello
"R Lion" <pit...@NOSPAMyahoo.es> wrote in message
news:avkicb$3fr$1...@titan.bt.es...

> 48G: 32Kb
> 48G+: 128Kb
> 48GX: 128Kb + two eXpansion ports (up to 128Kb in the first, up to 4MB in
> the second)

That is the misleading advertizing of the HP48..
There's a flaw in the actual memory architecture of the HP48 preventing to
use a card bigger than 2MB. Otherwise you will always get a "Invalid Card
Data" error messages

Jean-Yves


Steen Schmidt

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Jan 10, 2003, 4:04:23 AM1/10/03
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> That is the misleading advertizing of the HP48..
> There's a flaw in the actual memory architecture of the HP48 preventing to
> use a card bigger than 2MB. Otherwise you will always get a "Invalid Card
> Data" error messages

That's not entirely correct. The HP48GX can acces 31 ports in memory slot 2,
which means 3968 kb - a 4 Mb card willl have 32 ports of 128 kb as you know.
Port 32, if present, will result in the Invalid Card Data error.

Companies like Klotz solve this by making the user able to alternate between
the four last ports in pairs with a dipswitch on the card itself. This means
you at all time have 3840 kb at your service, and that you at any time can
switch the last 256 kb to an alternate portion of 256 kb.

With the 128 kb user memory, a 128 kb card in slot 1 and a Klotz 4 Mb card
in slot 2, you'll actually have 4 Mb avaviable RAM at any time.

Regards
Steen


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