ZX81 strange keyboard problem?

Anything Sinclair ZX Basic related; history, development, tips - differences between BASIC on the ZX80 and ZX81
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sirmorris
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Re: ZX81 strange keyboard problem?

Post by sirmorris » Thu Jul 20, 2017 1:59 pm

Screen Shot 2017-07-20 at 17.21.07.png
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--=== ZXpand+ ... A more moderner all-in-one upgrade solution for ZX81 ===--
* SD/MMC storage * 32K Hires-capable RAM * AY sound chip * Joystick port * Serial *
* BASIC enhancements - plug & play * Reset button * Auto-boot facility *
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1024MAK
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Location: Looking forward to summer in Somerset, UK...

Re: ZX81 strange keyboard problem?

Post by 1024MAK » Thu Jul 20, 2017 4:21 pm

Like :P

Mark
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Moggy
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Re: ZX81 strange keyboard problem?

Post by Moggy » Thu Jul 20, 2017 4:42 pm

Who's Andy "Rae" :?: ;)
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sirmorris
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Re: ZX81 strange keyboard problem?

Post by sirmorris » Thu Jul 20, 2017 6:22 pm

<cough> :lol:
--=== ZXpand+ ... A more moderner all-in-one upgrade solution for ZX81 ===--
* SD/MMC storage * 32K Hires-capable RAM * AY sound chip * Joystick port * Serial *
* BASIC enhancements - plug & play * Reset button * Auto-boot facility *
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Andy Rea
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Location: notts UK

Re: ZX81 strange keyboard problem?

Post by Andy Rea » Thu Jul 20, 2017 6:30 pm

Lol.... I'm back home now and well curiosity got the better of me so i took pin 39 and bent it aside... take that A6' i said to the ula... and this is what happens with " HELLO WORLD " repeated
Image

Looks like in that case the bit stays high, oh well all good fun
6 x ZX81, 1 x TS1500 , 1 x +3e, 1 x timex 2040 printer, 1 x timex 2020 cassette deck, siclair printer and some spectrum
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Moggy
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Re: ZX81 strange keyboard problem?

Post by Moggy » Thu Jul 20, 2017 8:50 pm

sirmorris wrote: ↑
Thu Jul 20, 2017 6:22 pm
 <cough> :lol:
Naughty Charles very naughty!!
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Paul
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Re: ZX81 strange keyboard problem?

Post by Paul » Fri Jul 21, 2017 12:16 pm

Moggy wrote: ↑
Thu Jul 20, 2017 4:42 pm
 Who's Andy "Rae" :?: ;)
Maybe a relative of Sugar Rae Robinson? :geek:
In theory, there is no difference between theory and practice. But, in practice, there is.
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The_Bert
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Re: ZX81 strange keyboard problem?

Post by The_Bert » Tue Aug 08, 2017 5:51 am

sirmorris wrote: ↑
Thu Jul 20, 2017 1:59 pm
 Screen Shot 2017-07-20 at 17.21.07.png
What do I have to do to get one of those? It's so beautiful, so majestic! I want one! *throws a hissy-fit on the floor*
:lol:
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Zxkim81
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Joined: Sat Mar 18, 2017 7:44 pm

Re: ZX81 strange keyboard problem?

Post by Zxkim81 » Sun Dec 24, 2017 5:51 pm

Can I offer an explanation to this problem please.
I think it could be the memory at fault if you plug in the ram pack
Does the problem go away? If so it's the s ram ic,s.....Kim 😋
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