- Screen Shot 2017-07-20 at 17.21.07.png
- (1.82 MiB) Downloaded 570 times
ZX81 strange keyboard problem?
Re: ZX81 strange keyboard problem?
--=== 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 *
* SD/MMC storage * 32K Hires-capable RAM * AY sound chip * Joystick port * Serial *
* BASIC enhancements - plug & play * Reset button * Auto-boot facility *
Re: ZX81 strange keyboard problem?
Who's Andy "Rae"



Re: ZX81 strange keyboard problem?
<cough> 

--=== 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 *
* SD/MMC storage * 32K Hires-capable RAM * AY sound chip * Joystick port * Serial *
* BASIC enhancements - plug & play * Reset button * Auto-boot facility *
Re: ZX81 strange keyboard problem?
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

Looks like in that case the bit stays high, oh well all good fun

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
Re: ZX81 strange keyboard problem?
In theory, there is no difference between theory and practice. But, in practice, there is.
Re: ZX81 strange keyboard problem?
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
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
