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ZX81s with the ROM fix

Posted: Mon Jan 29, 2018 5:26 pm
by Whopper
So, I've just received another ZX81 fro eBay. Opened it up and it's another one with the ROM fix chips on top.

I only have three ZX81s, two being with the ROM fix, so exactly HOW rare are these things?

Whopper

Re: ZX81s with the ROM fix

Posted: Mon Jan 29, 2018 7:18 pm
by 1024MAK
Apparently in your house, not rare at all... :lol:

Different story here, I have at least ten ZX81s with normal ROM chips... plus I think one with the extra circuit to fix the ROM.
Of those without the fix, one is not working due to a faulty ULA. This may have the bugged ROM. I think most of the rest have the 'fixed' ROM.

Mark

Re: ZX81s with the ROM fix

Posted: Mon Jan 29, 2018 10:38 pm
by Lardo Boffin
I have bought three kludge fix zeddies (i.e. with the extra circuit on top) off eBay so far. But then that is probably out of 15 to 20 zeddies.
I think I passed two of these on to members on here. :)
They tend to have the deeper sponge feet rather than the shallower harder rubber feet and in my case two of them came with ZX80 PSUs.