I've been busy the last week coding an idea that I hoped would fit in an unexpanded ZX81.
It should work on any unexpanded ZX81, or with memory expansion that is WRX-modified.
I've tested this version to work on:
- EightyOne emulator, 1k or 16k RAM, PAL or NTSC, WRX
- ZX81 with internal 16k WRX RAM and 8k UDG at 8192, PAL
- ZX81 (bad internal memory) and ZXpand, PAL
See the zip for source-code.
Enjoy!
Edits:
1: renamed the file to vbars
2: replaced the p-file with a zip containing executable, source and readme
My new 1K demo
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nollkolltroll
- Posts: 325
- Joined: Sat Sep 27, 2014 8:02 pm
- Location: Stockholm, Sweden
My new 1K demo
Last edited by nollkolltroll on Wed Oct 21, 2015 1:02 pm, edited 1 time in total.
/Adam
Re: My new 1K demo
It is easy to simulate a 1k Zeddy (even with 16k or more) by setting RAMTOP to 17408 resp. POKE 16389,68 and followed by NEW. 
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nollkolltroll
- Posts: 325
- Joined: Sat Sep 27, 2014 8:02 pm
- Location: Stockholm, Sweden
Re: My new 1K demo
Yes, memory-size is easy. I know that the size is OK.
The graphics capabilities of a 1k-machine are supposed to be WRX-compatible, but I have yet to test it for myself on my code. Not having an unmodified 1k-machine stopped me from being certain that it works, now I can only hope that it works.
The graphics capabilities of a 1k-machine are supposed to be WRX-compatible, but I have yet to test it for myself on my code. Not having an unmodified 1k-machine stopped me from being certain that it works, now I can only hope that it works.
/Adam
Re: My new 1K demo
Cool!!!! I like it (without a LIKE-Button) 
eyerything will be okay in the end.
if it´s not okay, it´s not the end.
and: uıɐbɐ ʎɐqǝ uo pɹɐoqʎǝʞ ɐ ʎnq ɹǝʌǝ ɹǝʌǝu ןןıʍ ı
if it´s not okay, it´s not the end.
and: uıɐbɐ ʎɐqǝ uo pɹɐoqʎǝʞ ɐ ʎnq ɹǝʌǝ ɹǝʌǝu ןןıʍ ı
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nollkolltroll
- Posts: 325
- Joined: Sat Sep 27, 2014 8:02 pm
- Location: Stockholm, Sweden
Re: My new 1K demo
It occured to me that this is a PAL-only release. On NTSC-machines the timing is too off to produce the desired effect.
An NTSC-fixed version will be released in the future.
An NTSC-fixed version will be released in the future.
/Adam
Re: My new 1K demo
Works perfectly on my Unmodified zeddy, Great, hmmm this is also proof that there is still something not quite right with my RAM-pack regarding WRX-compatibilty, i don't have time atm to solve this, but at least i do have a perfect tester !
32K SRAM WRX compatible, 32Bit IO-Port, ROM Ghost, ZX-Printer.
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nollkolltroll
- Posts: 325
- Joined: Sat Sep 27, 2014 8:02 pm
- Location: Stockholm, Sweden
Re: My new 1K demo
Thank you zx81jens, it is good to hear that all the work is appreciated.
Rishi, thanks for testing on a real zeddy, now I'll go ahead and finish the release.
Rishi, thanks for testing on a real zeddy, now I'll go ahead and finish the release.
/Adam
Re: My new 1K demo
nollkolltroll wrote:Yes, memory-size is easy. I know that the size is OK.
The graphics capabilities of a 1k-machine are supposed to be WRX-compatible, but I have yet to test it for myself on my code. Not having an unmodified 1k-machine stopped me from being certain that it works, now I can only hope that it works.
That is right. See my 1K hires games. They use WRX.
Re: My new 1K demo
Will take a look when source is there....nollkolltroll wrote:I've been busy the last week coding an idea that I hoped would fit in an unexpanded ZX81.
......
FASM source will follow when I've cleaned it up some, and when I get confirmation that the demo works or not on a real unexpanded ZX81.
Enjoy!
Edit: renamed the file to vbars
Also later look on demo. No emulator available now...
Re: My new 1K demo
It looks good 
Congrats,
Zsolt
Congrats,
Zsolt
ZX81 (8K), ENTERPRISE 128, [ZX SPECTRUM (48K,+,+128K,+2,+2A), TS1000, TS1500, TS2068, Cambridge Z88, PRIMO A64 (red)]