Search found 1125 matches

by mrtinb
Tue Dec 10, 2019 11:33 am
Forum: Hardware
Topic: ZX80 no "K" prompt
Replies: 12
Views: 756

Re: ZX80 no "K" prompt

The ZX is not so forgiving. Everything has to be in order for the picture to show, because the picture is purely software :)
by mrtinb
Mon Dec 09, 2019 12:39 pm
Forum: Software
Topic: Hot ZII?
Replies: 26
Views: 1923

Re: Hot ZII?

I have no experience in connecting the a cassette player to pc.

However when I connect a TZXduino output to EAR on a ZX81 or Lambda 8300 to load software, the pulses are 5V. If they are lower the program will not load.
by mrtinb
Mon Dec 09, 2019 11:31 am
Forum: Development
Topic: New year, new projects?
Replies: 12
Views: 1948

Re: New year, new projects?

What I hear you say is: Sometimes EEPROMs can replace GALs if the speed of the EEPROM is sufficient for the circuit. If the speed of the EEPROM is too slow, a CPLD can be used.
by mrtinb
Mon Dec 09, 2019 7:17 am
Forum: Development
Topic: New year, new projects?
Replies: 12
Views: 1948

Re: New year, new projects?

Isn’t an EEPROM a suitable replacement for a GAL?
by mrtinb
Sun Dec 08, 2019 10:15 pm
Forum: Hardware
Topic: Homebrew add-on
Replies: 2
Views: 316

Re: Homebrew add-on

It looks more like a software dongle we know from the PCs printer port. E.g. the software will not work without the dongle attached, hence a pirate copy of the software will not work, as it needs the dongle. P.S. I've asked the administrators to move this post to the ZX81, because it has nothing to ...
by mrtinb
Sun Dec 08, 2019 9:14 pm
Forum: Hardware
Topic: Zxpand still available?
Replies: 6
Views: 403

Re: Zxpand still available?

Once every 2 year SirMorris creates a batch if he desires. Then he sells them on SellMyRetro.com.

The design is is not public.

Your only option is patience.
by mrtinb
Sun Dec 08, 2019 8:24 am
Forum: Software
Topic: Hot ZII?
Replies: 26
Views: 1923

Re: Hot ZII?

You are simply talking past each other. DesSony is talking about cables, and XavSnap is talking about processing the sound after recording. The misunderstanding occurred when mentioning that the recording on the tape could be “bettered” with an assembly program, and re-recorded. This step is not nee...