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'[BUY]: Wanted, Z80 single board computer'
2001\11\06@064311 by Jean-Michel Howland

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Does anyone have an old Z80 single board computer that they want to sell
for cheap?

The smaller the better and it really needs to be single +5v supply @ less
than 5A.

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2001\11\06@065650 by Kathy Quinlan

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Yes hon I have one, where are you ?

not sure on the specs, or what chips are missing (like the ram / EPROM /
pio) but the board worked last time I played with it :o)

Regards,

Kat
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{Original Message removed}

2001\11\06@073839 by Jean-Michel Howland

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Hi Kat,

>Yes hon I have one, where are you ?

How cool!!!!  I'm over in Innaloo, however Kensington isn't far from here
so I could pick it up. :o)

>not sure on the specs, or what chips are missing (like the ram / EPROM /
>pio) but the board worked last time I played with it :o)

How big is the beastie because I want to mount it on my chair, so physical
size is an issue!  And finally, the 64 dollar question, how much do you
want for it?

Regards
Jean-Michel.




>Regards,
>
>Kat
>____________________________________________________________________________
> /"\   ASCII Ribbon Campaign  |        K.A.Q. Electronics
> \ / - NO HTML/RTF in e-mail | Software and Electronic Engineering
> X  - NO Word docs in e-mail  |      Perth Western Australia
> / \                                            |        Ph +61 419 923 731
>____________________________________________________________________________
>
>
>{Original Message removed}

2001\11\06@133955 by Harold M Hallikainen

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       I am reminded of an old Idea For Design or something like that it one of
the magazines. It was "How to use a Z80 to compute square roots." The
circuit consisted of an op-amp with a Z-80 in the feedback loop. It used
the Z80 as a diode to get a logrythmic I/V curve to compute the square
roots!

Harold

FCC Rules Online at http://hallikainen.com/FccRules
Lighting control for theatre and television at http://www.dovesystems.com

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2001\11\06@135153 by uter van ooijen & floortje hanneman

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> Does anyone have an old Z80 single board computer that they want to sell
> for cheap?

I have an ZX81 with a defect in the video that would love to get a better
home. But I guess the postage would be more than it is worth...
Wouter

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2001\11\06@222531 by Jean-Michel Howland

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>> Does anyone have an old Z80 single board computer that they want to sell
>> for cheap?
>
>I have an ZX81 with a defect in the video that would love to get a better
>home. But I guess the postage would be more than it is worth...
>Wouter

Yes I think you're right but thanks for the offer. :o)

Regards
Jean-Michel.

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2001\11\07@111057 by M. Adam Davis

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Ooh!  Me! Me!

I loved the zx81.  What kind of defect is it?  I still have a lot of
tapes, but no '81.

-Adam

wouter van ooijen & floortje hanneman wrote:

{Quote hidden}

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2001\11\07@152630 by uter van ooijen & floortje hanneman

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> Ooh!  Me! Me!
>
> I loved the zx81.  What kind of defect is it?  I still have a lot of
> tapes, but no '81.

It is actually a timex/sinclair 1000, but that is practically the same as
the original ZX81. I loved it too. I modified it to output video instead of
UHF TV signal. Worked fine some time, but at one time it simply did not work
anymore. I guess the video output pin of the big ASIC has lost its white
smoke. It weights 350 (PCB + kbd, no 16k RAM or wall-wart). I must have an
azmic EPROM (assembler 'IDE') somewhere.

I guess an emulator on a PC is an easier way for you to play with your old
tapes...

Wouter van Ooijen

Van Ooijen Technische Informatica: http://www.voti.nl
Jal compiler for PIC uC's:  http://www.voti.nl/jal

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2001\11\07@193132 by Josh Koffman

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The coolest thing (well, one of the coolest things) about the zx81 was
that it only had 4 chips in it, and they controlled everything including
video, tape, keyboard, and external i/o! Um, at least I think it was the
zx81...

Josh

"M. Adam Davis" wrote:
{Quote hidden}

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2001\11\08@032525 by D Lloyd

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Hi,

"The coolest thing (well, one of the coolest things) about the zx81 was
that it only had 4 chips in it, and they controlled everything including
video, tape, keyboard, and external i/o! Um, at least I think it was the
zx81..."

Wasn't it the ZX81 that prompted Bill Gate$ to question whether anyone
would really need more than 1K of RAM? ;-)
I was more of a Spectrum man, myself.
So much so, in fact, that my ZX Spectrum-powered embedded web server will
be online later this year. Useless? You bet.

Regards,
Dan

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