Topic: ZX80 on ebay, strange mod ?  (Read 1835 times)

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Offline Panther

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ZX80 on ebay, strange mod ?
« on: May 13, 2014, 01:10:58 PM »
Spotted this on ebay, noting special at first glance;

Modified ZX80

Just wondered what the additional board was, Extra RAM ??

Offline moggy

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Re: ZX80 on ebay, strange mod ?
« Reply #1 on: May 13, 2014, 01:18:19 PM »
If memory serves it's a NMI (non-maskable interrupt) board that allows it to run like a zx81.

Offline andy_rea

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Re: ZX80 on ebay, strange mod ?
« Reply #2 on: May 13, 2014, 04:43:16 PM »
I'm with Moggy on that, certainly looking at were those wires are connected around the video sync circuitry.

Andy
ZX81 nutter....