Search found 387 matches
- Wed Nov 16, 2022 7:09 pm
- Forum: Development
- Topic: Run Machine Code in High Memory
- Replies: 8
- Views: 4463
Re: Run Machine Code in High Memory
Yes, the Timex/Sinclair 1000 is a ZX81, using a ZX81 UK motherboard fitted with the optional 2K RAM chip and jumpered for 60hz television. The ROM is the same as a ZX81 The articles Rich uploaded are no longer available at that link, but from his description seem to be from SyncWare News Volume 2 no...
- Wed Nov 16, 2022 3:47 am
- Forum: SALES
- Topic: ZX81 on ebay.
- Replies: 1
- Views: 1304
Re: ZX81 on ebay.
wow, a time capsule Sold: 55 pounds ZX81 with Games, manuals and RAM Pack - TESTED & WORKING a.jpg looks like * ZX81 with ZX POWER SUPPLY, video cable & cassette cables * ZX 16K RAM pack Tapes * sinclair ZX81 SPACE RAIDERS by PSION * 16K TUT-TUT by CRONOSOFT * sinclair ZX81 CHESS-CLOCK by PSION LTD ...
- Wed Nov 16, 2022 3:08 am
- Forum: Lambda 8300/ Power 3000 Lounge
- Topic: 😲😞
- Replies: 14
- Views: 13165
Re: 😲😞
Does this Lambda Colour Pack work as an attachment to the ZX81, or is it strictly designed to be used with the Lambda 8300?
- Mon Nov 14, 2022 12:51 am
- Forum: Welcome Area
- Topic: Hello from Zeeland
- Replies: 8
- Views: 2218
Re: Hello from Zeeland
wow first i hear of Bang & Olufsen ZX81 Beocomp, it would look good next to the B&O record player
photo Mark NL via wikcommons
It looks like standard-issue UK ZX81
photo Mark NL via wikcommons
It looks like standard-issue UK ZX81
- Thu Oct 27, 2022 3:55 am
- Forum: Hardware
- Topic: Sinclair SCL/ULA
- Replies: 14
- Views: 7801
Re: Sinclair SCL/ULA
thanks. I have edited that post to remove the socket information. It was old info collected from prior posts on this forum
- Wed Oct 26, 2022 11:38 am
- Forum: Hardware
- Topic: Sinclair SCL/ULA
- Replies: 14
- Views: 7801
Re: Sinclair SCL/ULA
Thanks! Now edited to say "Chapter 25" instead of "page 25"
you have eagle eyes
you have eagle eyes
- Wed Oct 26, 2022 11:30 am
- Forum: Hardware
- Topic: Full-travel mechanical keyboard - No mods to ZX81
- Replies: 1
- Views: 571
Full-travel mechanical keyboard - No mods to ZX81
I spent many hours typing away on the original ZX81 keyboard and had no problems with it. Even if it lacked tactile feedback, I was quite happy with it, it worked fine at a minimal level Even so, back around 1985 I added a surplus full-travel keyboard. I bought it as i recall at an automotive swap m...
- Wed Oct 26, 2022 9:24 am
- Forum: Sinclair Misc
- Topic: Repurposing the ZX81 Keyboard
- Replies: 6
- Views: 3134
Re: Repurposing the ZX81 Keyboard
Regarding the title of this topic ("Repurposing the ZX81 Keyboard"), my initial thought was why would you want to do that? That's a hack. But i recognize there is utility in a small, flat, lightweight keyboard. For a while I carried around a foldable neoprene travel keyboard to use with my PC. This ...
- Wed Oct 26, 2022 8:42 am
- Forum: Hardware
- Topic: Sinclair SCL/ULA
- Replies: 14
- Views: 7801
SCL/ULA links
sinclairzxworld site search Deep dive on the 2C184E SCL explains all the functionality and includes equivalent circuit diagrams New/replacement ULA where to find. Are they still available? Making a new SCL from a CPLD chip and Andy Reas's improved ULA from a CPLD ULA heat issues . Should I get a he...
- Wed Oct 26, 2022 8:21 am
- Forum: Hardware
- Topic: Sinclair SCL/ULA
- Replies: 14
- Views: 7801
ULA Versions
The ZX81 SCL/ULA comes in three versions. All these SCLs interchange, but the last one has an improved video signal circuit 2C158E is the earliest version 2C184E is the middle revision. No significant difference from 2C158 2C210E has the video back porch signal, for better compatibility with more ex...