Search found 195 matches

by GCHarder
Sat Nov 17, 2018 12:09 am
Forum: GAMES
Topic: 50 games with hires in 1K
Replies: 12
Views: 454

Re: 50 games with hires in 1K

Just 16K RAMpack wouldn't work, it also has to be Hi Res capable.

Regards;

Greg
by GCHarder
Wed Oct 31, 2018 2:55 pm
Forum: ZX BASIC
Topic: Possible bug in ZX81x2 ROM ?
Replies: 36
Views: 1307

Re: Possible bug in ZX81x2 ROM ?

Here's a list of the ROM calls used, the Siggi problem is caused by the STR$ function being moved. ;------- Rom and Ram Symbols ------- SLOW equ $0F2B DISPLAY_5 equ $02B5 DISPLAY_3 equ $0292 LOOP_11 equ $0216 SCANNING equ $0F55 FP_TO_A equ $15CD FIND_INT equ $0EA7 STACK_BC equ $1520 FP_TO_BC equ $1...
by GCHarder
Tue Oct 30, 2018 10:20 pm
Forum: ZX BASIC
Topic: Possible bug in ZX81x2 ROM ?
Replies: 36
Views: 1307

Re: Possible bug in ZX81x2 ROM ?

I'll check the whole listing tonight to see if there are any another esoteric ROM calls.

Regards;

Greg
by GCHarder
Sat Oct 27, 2018 4:35 am
Forum: ZX BASIC
Topic: Possible bug in ZX81x2 ROM ?
Replies: 36
Views: 1307

Re: Possible bug in ZX81x2 ROM ?

The "FILL" routine makes a call to n-mod-m (1C37) at 48F5, it's no longer at that location. The program doesn't crash because it hits the RST 08 with error code E6 at 1C49, causing the stack to reset and return to BASIC. That's why nothing is printed.

Regards;

Greg
by GCHarder
Tue Jun 19, 2018 10:23 pm
Forum: Software
Topic: ZX81 Youtube videos
Replies: 2
Views: 961

ZX81 Youtube videos

Just posted a "MacroLIFE" animation video.

https://www.youtube.com/watch?v=A8oVXCXJyZc

I'll add other videos and demos here as I get them done.

Regards;

Greg
by GCHarder
Sat Jun 16, 2018 10:17 pm
Forum: SALES
Topic: Pretty nicer setup
Replies: 0
Views: 459

Pretty nicer setup

Here's a pretty nice setup at ebay... https://www.ebay.com/itm/SINCLAIR-TIMEX-TS1000-ZX81-computer-in-DKTronics-console-64-KRAM-8K-NVRAM/362355938165?epid=2130390092&hash=item545e18d375:g:GiYAAOSw88RbJTSD Keyboard, 64K, Hunter NVM Board, composite video, 3 books, and a "Buy It Now" price of $149.95,...
by GCHarder
Sat Jun 16, 2018 9:53 pm
Forum: Sinclair Misc
Topic: Micro Cornucopia
Replies: 0
Views: 580

Micro Cornucopia

Micro Cornucopia was an old computer magazine published in the 80's. While not specifically geared towards the Sinclair computers, I always found it an interesting read. It's mostly a magazine for "programmers" especially C and Pascal. They also published hardware projects as well. It was mostly "me...
by GCHarder
Tue Jun 05, 2018 10:05 pm
Forum: Sinclair Misc
Topic: Youtube video explaining ZX81 video modes
Replies: 0
Views: 562

Youtube video explaining ZX81 video modes

A nice new video, unfortunately in Portuguese, must have originated from Brazil.

"Description of the different "High Resolution" (HIRES) systems in the Sinclair ZX81"

https://www.youtube.com/watch?v=llMVLLnJmaM

Regards;

Greg
by GCHarder
Sat May 26, 2018 9:46 pm
Forum: Hardware
Topic: ZX81 clone or what?
Replies: 2
Views: 466

ZX81 clone or what?

While searching around on the net I found these at this site...

https://auction.catawiki.com/kavels/176 ... clair-zx81

But there is no info on what they are.

They look like some kind of ZX81 clone with an old PC game port interface.

Regards;

Greg
ZX81WhatA.jpg
ZX81WhatB.jpg
by GCHarder
Sat May 19, 2018 9:13 pm
Forum: Development
Topic: New ZX81 game in development - Mage: The Enchanted Crystals
Replies: 5
Views: 626

Re: [NEW ZX81 GAME IN DEVLOPMENT] - Mage

Also, just letting you guys know that the digital downloads for my other games are now available via http://revivalstudios.itch.io , so you can donate whatever you like for most stuff and try the other games yourself. Thanks for this, I've always wanted to buy your games but that extra VAT tax alwa...