Paging NE-Z80 owners! Paging NE-Z80 owners! - test-drb@ccmp.vtda.org

4 Nov 2012

Hi Alexandre!

I did not had a NE-Z80 but an early model TK-82C.
It had a SLOW function at the keyboard but it lacks the circuitry to proper respond to
it.I can say it used a copy of the ZX-81 EPROM.
When later I built a SLOW pig board circuit it worked as expected on original ZX-81.

The TK-82C and NE-Z80 circuit was identical to ZX-80. And behave like the ZX-80 if you
adapt it's EPROM to those.
What Microdigital (TK-82) and Prologica (NE-Z80) did on those time was use standard parts.
Copying the ZX-80 circuit to avoid the custom chip used in ZX-81.
So , Yes, you can use the ZX-81 ROM image in a NE-Z80 as it had the same and exactly
content.
The ZX clones started to differ from the original when they started producing TK-85,
CP-200 and others. Some licensed by Sinclair, I Believe.

Ricardo

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Date: Sat, 3 Nov 2012 04:31:47 -0200
From: "Alexandre Souza - Listas" <pu1bzz.listas at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
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Subject: Paging NE-Z80 owners! Paging NE-Z80 owners!
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? ? Who knows? :o)

? ? Anyone on this list has the "Nova Eletronica NE-Z80" computer from 
Brazil?

? ? I'm finishing restoring a pair, but none of them has the original EPROM 
with the firmware. I've never seen one of these in person before (it is a 
RARE computer in Brazil) and although it is a "mostly perfect" clone of the 
ZX-80, the keyboard is a bit different - it is exactely the keyboard of the 
ZX-81 but without the "slow" function. Is it the ZX-81 ROM, or a modified 
one?

? ? Thanks
? ? Alexandre Souza