What else might be connected on the ZX81 alongside the ZXPand+ ?

Discussions about Sinclair ZX80 and ZX81 Hardware
Lardo Boffin
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Joined: Sat Nov 26, 2016 2:42 am

Re: What else might be connected on the ZX81 alongside the ZXPand+ ?

Post by Lardo Boffin » Thu Aug 22, 2019 9:01 am

I only have a ZXpand not a plus but mine works fine with both my Memotech Keyboard and ChromaSCART plugged in. Very useful for testing the occasional zeddy that happens along.
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500
TS 2000
Spectrum 16k (iss 1 s/n 1499)
Various Spectrum 48ks plus a DIVMMC future and SPECTRA

Bean
Posts: 50
Joined: Fri Aug 01, 2014 8:40 pm

Re: What else might be connected on the ZX81 alongside the ZXPand+ ?

Post by Bean » Thu Aug 22, 2019 2:31 pm

Yeah, I have the regular ZXPand too (not a ZXPand+).

And it just seems like it won't move the RAM out of the 8K to 16K area.

Even after I do CONFIG "M=H" and verify with CONFIG "M" if I poke the 8K to 16K region it remembers the value, but if I poke the 40K to 48K region it doesn't. And after I power-off if I do a CONFIG "M" the RAM is back to 8K to 40K. Strange....

The ZXPand seems to work fine otherwise, and my board works fine when I write to it, but I cannot read from it because the ZXPand memory is in the same region (8K to 16K).

Bean

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mrtinb
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Re: What else might be connected on the ZX81 alongside the ZXPand+ ?

Post by mrtinb » Thu Aug 22, 2019 2:39 pm

Maybe try to write to SirMorris on SellMyRetro. I'm not sure if he follows all threads in this forum.
Martin
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube

Moggy
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Joined: Wed Jun 18, 2008 2:00 pm

Re: What else might be connected on the ZX81 alongside the ZXPand+ ?

Post by Moggy » Thu Aug 22, 2019 2:43 pm

I can confirm, as Martin recommends, that Sir Morris is best contacted through Sell My Retro.

Bean
Posts: 50
Joined: Fri Aug 01, 2014 8:40 pm

Re: What else might be connected on the ZX81 alongside the ZXPand+ ?

Post by Bean » Thu Aug 22, 2019 3:52 pm

Okay, thanks. I will try to contact him.

Bean

Bean
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Joined: Fri Aug 01, 2014 8:40 pm

Re: What else might be connected on the ZX81 alongside the ZXPand+ ?

Post by Bean » Tue Aug 27, 2019 4:02 pm

I have sent a message to SirMorris on sellmyreto on 8/22 but I haven't heard anything back yet.
Does anyone know if there is another way to try to contact him ?

Thanks,
Bean

nollkolltroll
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Location: Stockholm, Sweden

Re: What else might be connected on the ZX81 alongside the ZXPand+ ?

Post by nollkolltroll » Tue Aug 27, 2019 6:25 pm

I believe he's on vacation in the USA, not very active at all electronically.
/Adam

Moggy
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Joined: Wed Jun 18, 2008 2:00 pm

Re: What else might be connected on the ZX81 alongside the ZXPand+ ?

Post by Moggy » Tue Aug 27, 2019 9:40 pm

nollkolltroll wrote:
Tue Aug 27, 2019 6:25 pm
I believe he's on vacation in the USA, not very active at all electronically.
Can confirm that the good Knight is currently Stateside.

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