Search found 3415 matches
- Tue Nov 05, 2024 9:31 pm
- Forum: Sinclair Misc
- Topic: Sinclair Calculator
- Replies: 5
- Views: 1646
Re: Sinclair Calculator
Also used to clean coins by some and the armatures of power tools.
- Sun Nov 03, 2024 2:54 pm
- Forum: Software
- Topic: HOT-Z Keys
- Replies: 40
- Views: 32073
Re: HOT-Z Keys
My EPROM burner was designed to connect and work on both the Zeddy and the Speccy including the 2A in 48 mode so yes some do with the ZX printer being the obvious example.
- Sat Nov 02, 2024 1:11 pm
- Forum: Development
- Topic: Top Five Z80 Coding Hacks In Five Minutes
- Replies: 11
- Views: 1546
Re: Top Five Z80 Coding Hacks In Five Minutes
I've used XOR as one part of my four part encryption/cipher programs, other than that no.
- Fri Nov 01, 2024 1:42 pm
- Forum: ZX BASIC
- Topic: ZX81 RAM Disk Operating System
- Replies: 17
- Views: 19047
Re: ZX81 RAM Disk Operating System
The board could be wired for EPROMs or static memory chips, I have both types. If the board was populated with static memory chips you could write to the board, throw a switch to isolate the writing side of things which could corrupt the data if the switch was left open and the battery would keep th...
- Thu Oct 31, 2024 10:11 pm
- Forum: ZX BASIC
- Topic: ZX81 RAM Disk Operating System
- Replies: 17
- Views: 19047
Re: ZX81 RAM Disk Operating System
The "Hunter" board used to have battery backup so it may have been useful for that. I have two of those C/W with the correspondence between Paul Hunter and the American customer he sold them to for his Gardening business and can confirm that it was indeed useful in that respect as you could store r...
- Mon Oct 28, 2024 11:58 pm
- Forum: Hardware
- Topic: Re-Programmable ROM Replacement
- Replies: 5
- Views: 809
Re: Re-Programmable ROM Replacement
Being an old dinosaur I tend to stick with the boatload of 2764s I have, two pins lifted and two wires soldered, job done. As for the programmer I paid a fiver for one which does all the old 25v jobbies it's powered by my ZX Spectrum and is far simpler than any modern programmer so going into minor ...
- Sun Oct 20, 2024 4:50 pm
- Forum: Hardware
- Topic: Weird ZX81 Behavior Cased By ROM
- Replies: 13
- Views: 1753
Re: Weird ZX81 Behavior Cased By ROM
You have a 622 2nd issue ROM, a final issue 649 and the Motorola one I believe is also a 649. Some ROM faults can be caused by tarnished pins so try cleaning the ones on the ROM that appears faulty. More ROM info can be found halfway down this thread courtesy of Mark. https://www.sinclairzxworld.com...
- Thu Oct 10, 2024 11:38 am
- Forum: Emulators
- Topic: New release of EightyOne available
- Replies: 354
- Views: 398702
Re: New release of EightyOne available
Wouldn't it be better for EightyOne to change RAMTOP? NO Eightyone does what it should do. It perfectly emulates the ZX81 and it add-ons. Also your post is very aggressive. If you don't know how the ZX81 works a question like "How can I get 64K working on EO" Or "Why do I have to enter .... to get ...
- Tue Oct 01, 2024 6:52 pm
- Forum: Hardware
- Topic: ZX81 with mismatched ROM, jumper cable and flat cursor
- Replies: 16
- Views: 4831
- Tue Oct 01, 2024 12:49 pm
- Forum: Hardware
- Topic: ZX81 with mismatched ROM, jumper cable and flat cursor
- Replies: 16
- Views: 4831
Re: ZX81 with mismatched ROM, jumper cable and flat cursor
Bit by bit it's getting there, nice one. :D The keyboard membranes Mark points to are very good replacements and have a more solid pair of ribbons than the original. One thing I have discovered with them is that once fitted leave them fitted as at end of the ribbon there appears to be some sort of c...