Search found 427 matches

by GCHarder
Fri Jul 14, 2017 9:20 pm
Forum: Sinclair Misc
Topic: ZX81 related webpage
Replies: 6
Views: 6242

Re: ZX81 related webpage

Here's another interesting site I just found. It's a games database for various computers including the Sinclair range. It's nicely organized, I don't think there are any downloads though, at least I haven't found them, maybe you have to register, I didn't. http://everygamegoing.com/landing/menus/ma...
by GCHarder
Sat Jun 17, 2017 12:16 am
Forum: Development
Topic: Calculator language
Replies: 21
Views: 8371

Re: Calculator language

just trying it with the new Zxpand+ and whilst some of the introductory surround/border is a bit corrupted the text is fine and so is the first demo That's because they're standard ZX81 patterns and are supposed to use the normal bit pattern table at 1E00, but are now using the patterns from the "o...
by GCHarder
Fri Jun 16, 2017 9:15 pm
Forum: Development
Topic: Calculator language
Replies: 21
Views: 8371

Re: Calculator language

Here's a program which uses the FP calculator extensively. Originally written for the Spectrum, I converted it way back in '87 to run on a hi-res capable T/S 1000. It shows that the calculator in the Spectrum is pretty much the same as the ZX81's. The listing is nicely annotated in the article. Rega...
by GCHarder
Fri Jun 02, 2017 12:37 am
Forum: Software
Topic: HOT-Z Keys
Replies: 33
Views: 26137

Re: HOT-Z Keys

Hi Steve; I had all my old stuff in a storage shed which got broke in and stolen. I'm sure they didn't know what it was, theyjust took everything that they could. I've had a request for the SHREB v 3 manual before which would be nice to get scanned if you have it. The version 2 manual has been poste...
by GCHarder
Thu Jun 01, 2017 9:29 pm
Forum: Emulators
Topic: New release of EightyOne available
Replies: 342
Views: 335155

Re: New release of EightyOne available

LOADing a binary file will sometimes disable the ZXPand ROM.

Regards;

Greg
by GCHarder
Thu Jun 01, 2017 12:47 am
Forum: Software
Topic: HOT-Z Keys
Replies: 33
Views: 26137

Re: HOT-Z Keys

Hi Steve; What a nice surprise! I never expected to see these, I'd forgotten that Hi-z was a Fred mod. of the program. I don't have anything from the old days, but I have managed to acquire 3 T/S 1000s and a couple ZX81s from Ebay, over the last few years. My best buy was a Memotech 64K Memopac for ...
by GCHarder
Mon May 22, 2017 10:43 pm
Forum: Software
Topic: Free online Z80 or ZX81 books
Replies: 13
Views: 13928

Re: Free online Z80 or ZX81 books

Toni is a lady... EDIT 21/05/2017 Almost forgot this the "Farewell" program at the end written by the author spells out,albeit very badly, the authors first name as "TONY" (masculine spelling) and has a facsimile of the authors own signature, again "Tony" at the bottom of the page. In the later rev...
by GCHarder
Mon May 22, 2017 1:06 am
Forum: Development
Topic: Bob Fraser ZX-81 Machine code articles. Missing parts.
Replies: 9
Views: 3891

Re: Bob Fraser ZX-81 Machine code articles. Missing parts.

Link here http://www.users.waitrose.com/~thunor/mmcoyzx81/index.html Plus a thread here which includes some musings about Tony Baker himself. http://www.sinclairzxworld.com/viewtopic.php?f=11&t=694&p=6228#p6228 That's "herself", it's Toni Baker. I 've seen this error several times before it must've...
by GCHarder
Fri May 12, 2017 12:37 am
Forum: Development
Topic: Double buffer grey scale?
Replies: 18
Views: 8460

Re: Double buffer grey scale?

See Fred Nachbaur's "Bi-Plot Demo" at Http//www.pictureviewerpro.com/hosting/zx81/fredn.htm "Bi-Plot demo" (16, WRX) This is a demonstration of a cool WRX16 display option. The 8K hi-res display file is divided into two 4K chunks, which are displayed on alternate frames to give a neat overlay effect...
by GCHarder
Fri May 12, 2017 12:27 am
Forum: Development
Topic: Double buffer grey scale?
Replies: 18
Views: 8460

Re: Double buffer grey scale?

I remember back in the day someone was selling a game that flashed to create colors by stimulating the retina at different frequencies. May be like when you stare at a an image for some time and then move to another the impression of color is given off. https://petapixel.com/2015/11/16/trick-your-b...