The first two (were there more than two?) Sinclair User annuals were superb. I have them both in a box somewhere, it was an exciting part of Christmas to get them!GCHarder wrote:I read this article by Dr. Logan from Sinclair User just last night, pretty fortuitous! It explains that add-on board nicely.
Search found 133 matches
- Fri Jun 20, 2014 10:31 am
- Forum: Hardware
- Topic: Query on a Issue 1 ZX81
- Replies: 34
- Views: 27139
Re: Query on a Issue 1 ZX81
- Thu Jun 19, 2014 5:20 pm
- Forum: Sinclair Misc
- Topic: ZX81 upgrade for ZX80
- Replies: 7
- Views: 3594
Re: ZX81 upgrade for ZX80
Ah... the days when Sinclair magazines actually contained some real meat.
- Thu Jun 19, 2014 12:03 am
- Forum: Sinclair Misc
- Topic: ZX81 upgrade for ZX80
- Replies: 7
- Views: 3594
Re: ZX81 upgrade for ZX80
No idea, sorry. What kind of material is the keyboard overlay made out of? Is it just paper?
- Thu Jun 12, 2014 10:33 pm
- Forum: Development
- Topic: ZX80 Core - new ZX80 motherboards
- Replies: 260
- Views: 115678
Re: ZX80 Core - new ZX80 motherboards
Thanks Karl, looking forward to giving it a go!
- Thu Jun 12, 2014 9:28 pm
- Forum: Development
- Topic: ZX80 Core - new ZX80 motherboards
- Replies: 260
- Views: 115678
Re: ZX80 Core - new ZX80 motherboards
It is different. On the 28C256 it's $5555 rather than $1555. No idea whether it write protects again, but there seem to be no options for sending these codes through the GQ USB software, unfortunately.
- Thu Jun 12, 2014 5:50 pm
- Forum: ZX BASIC
- Topic: ZX80core LED fun
- Replies: 1
- Views: 3450
ZX80core LED fun
Here's something I discovered last night. You need to run it in SLOW mode (i.e. with NMI board attached) on a ZX80core with the illumination kit, using the ZX81 ROM image. Oh, and make sure you don't have a printer attached! 10 LLIST 20 GOTO 10 Rather superbly, this results in a shimmering, very pal...
- Wed Jun 11, 2014 10:59 pm
- Forum: Development
- Topic: ZX80 Core - new ZX80 motherboards
- Replies: 260
- Views: 115678
Re: ZX80 Core - new ZX80 motherboards
I've determined the cause of my final problem. Here are my steps - using only ZX80 images in each position so that I can change the ROM switch without it crashing. 1. Start in position 4 - ZX80 image, write protected. 2. Boots up successfully. 3. Carefully change switch to position 0 - ZX80 image, n...
- Mon Jun 09, 2014 11:31 am
- Forum: ZX BASIC
- Topic: Random maze generator.
- Replies: 9
- Views: 8860
Re: Random maze generator.
Back on topic, the Maze Generator... Here is a Maze Generator for the ZX80, written by... Nigel Searle. Remember him?
10 PRINT CHR$(RND(3));
20 GO TO 10
It appeared in Sync magazine back in 1980:
https://archive.org/stream/syncmagazine ... 2/mode/1up
10 PRINT CHR$(RND(3));
20 GO TO 10
It appeared in Sync magazine back in 1980:
https://archive.org/stream/syncmagazine ... 2/mode/1up
- Mon Jun 09, 2014 11:26 am
- Forum: ZX BASIC
- Topic: Random maze generator.
- Replies: 9
- Views: 8860
Re: Random maze generator.
...or execute 24 SCROLLs one after the other. Doing that before a SAVE will knock a few seconds off the loading time. I wonder why Vickers 'cheated' with the scroll routine and made it generate short lines? It's annoying because you end up with all sorts of screen flickering next time you do a CLS, ...
- Mon Jun 09, 2014 11:23 am
- Forum: ZX BASIC
- Topic: How To Test the screen memory...(The DF_CC Vs D_FILE)
- Replies: 4
- Views: 5659
Re: How To Test the screen memory...(The DF_CC Vs D_FILE)
I don't feel that the obfuscated style of coding really shows the ZX81 at its best, but to each their own!