Search found 3282 matches
- Sun May 05, 2024 9:52 pm
- Forum: GAMES
- Topic: New ZX81 Games
- Replies: 383
- Views: 709046
MINOSS KNOSSOSS UPDATED UDGs.
Updated UDG version to show UDG chrs in menu and restore inverse letter "l". Still one slight aberration in instruction menu which I can't alter sadly.
- Sat May 04, 2024 9:26 pm
- Forum: Hardware
- Topic: Can any ZX80 gurus confirm this statement?
- Replies: 7
- Views: 164
Re: Can any ZX80 gurus confirm this statement?
Agreed, Mark, I think we can consider this one answered and closed.
- Sat May 04, 2024 6:15 pm
- Forum: Hardware
- Topic: Can any ZX80 gurus confirm this statement?
- Replies: 7
- Views: 164
Re: Can any ZX80 gurus confirm this statement?
The centre for computing history has an interesting entry re the ZX80 and John Grant of Nine Tiles the author of the ZX80 ROM. Quote. "The 8K Rom was withdrawn in September 1980 to reprogram it to add printer support among other things. Before finally being incorporated in to the ZX81 ROM." My take ...
- Sat May 04, 2024 5:53 pm
- Forum: Hardware
- Topic: Can any ZX80 gurus confirm this statement?
- Replies: 7
- Views: 164
Re: Can any ZX80 gurus confirm this statement?
I would tend to agree, why re-invent the wheel?
There is an upgrade ROM (assumed genuine ) up for sale on ebay and if it is the real thing then it's just a 550 which I've always thought was the one supplied by Sinclair.
Click picture to enlarge.
There is an upgrade ROM (assumed genuine ) up for sale on ebay and if it is the real thing then it's just a 550 which I've always thought was the one supplied by Sinclair.
Click picture to enlarge.
- Sat May 04, 2024 5:27 pm
- Forum: Hardware
- Topic: Can any ZX80 gurus confirm this statement?
- Replies: 7
- Views: 164
Re: Can any ZX80 gurus confirm this statement?
I understand and already knew about the overlay keyboard, but if you read the statement it implies that different code was used in the ZX80 "upgrade" ROM chip and this code was not the same code as used in a standard ZX81 550,622 or 649 ROM.
Hope that's clearer.
Hope that's clearer.
- Sat May 04, 2024 3:40 pm
- Forum: Hardware
- Topic: Can any ZX80 gurus confirm this statement?
- Replies: 7
- Views: 164
Can any ZX80 gurus confirm this statement?
Whilst browsing some ZX80 YouTube videos I came across this statement .... Quote. "i wish people would get it right, they did not put 8k zx81 roms in them on the up grade, they put a special 8k zx80 romset in, it had all the extra functions and the keyboard was correct, putting a zx81 rom in a zx80 ...
- Thu May 02, 2024 1:10 pm
- Forum: Hardware
- Topic: SCHEMA interface memotech I/F centronic type parallel printer interface
- Replies: 3
- Views: 231
Re: SCHEMA interface memotech I/F centronic type parallel printer interface
This is an old topic, pictures can be found in this thread, zip file 5th post.
https://www.sinclairzxworld.com/viewtop ... dac358f8d7
https://www.sinclairzxworld.com/viewtop ... dac358f8d7
- Tue Apr 30, 2024 10:48 pm
- Forum: Hardware
- Topic: RAM Packs Alternatives?
- Replies: 22
- Views: 625
Re: RAM Packs Alternatives?
Although the picture is quite blurred It looks like the solder coating has worn down to the copper tracks underneath in places making the edge connection unreliable, I would do as stroebeljc advises and re-coat the edge connector with solder.
- Tue Apr 30, 2024 5:12 pm
- Forum: Development
- Topic: 384 rows super HRG
- Replies: 26
- Views: 1060
Re: 384 rows super HRG
Your screenshot seems not to match Stefano's.
- Tue Apr 30, 2024 3:49 pm
- Forum: Hardware
- Topic: RAM Packs Alternatives?
- Replies: 22
- Views: 625
Re: RAM Packs Alternatives?
I have all issues of ZXpand including a recent prototype and like Paul have no problem with wobble whatsoever so yeah perhaps dirty or worn/uneven plating on edge connector.