Sinclair ZX80 / ZX81 / Z88 Forums

The rom could be found there: https://www.sinclairzxworld.com/viewtop ... 962#p31962

But I testet GOL-bugfree in EO, using the ZX81x2 rom. And it worked

The problems seems to be my USB driver environment, I use to load the program.
The USB driver updates some sysvars, to return information (the size of the loaded program and an error-code) to BASIC/the program, calling the driver. That is no problem for "normal" BASIC-programs, but probably destroys your very special "Basic" program ...

Sorry for that
Siggi

Siggi,

I have room enough to bypass all sysvar during loading so I will make a version with normal sysvar for you.

Mostly I need every byte but here I need a large screen so I have all room for some code I normally place over sysvar.

siggi wrote: ↑Tue Nov 07, 2023 2:27 pm The rom could be found there: https://www.sinclairzxworld.com/viewtop ... 962#p31962

But I testet GOL-bugfree in EO, using the ZX81x2 rom. And it worked

The problems seems to be my USB driver environment, I use to load the program.
The USB driver updates some sysvars, to return information (the size of the loaded program and an error-code) to BASIC/the program, calling the driver. That is no problem for "normal" BASIC-programs, but probably destroys your very special "Basic" program ...

Sorry for that
Siggi

This version has all startup code outside sysvar.
Your driver may access sysvar but not anymore after loading

Works as expected.
Thanks a lot
Siggi

PS: Meanwhile I think, that the USB-driver interface (using sysvars SEED and COORDS for return values), which has been designed for usage by BASIC-programs and was later enhanced for usage also by m/c programs, should get a new m/c interface (using registers instead of sysvars) .....

Name of Software: Fun Park ZX81

Author: Jonathan Cauldwell (code and font), Jarrod Bentley (graphics)

Release Date: 18/11/2023

Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 16K, Chroma interface

Description: Rewrite of Fun Park for the 16K Chroma-enabled ZX81

Screenshots:




Download link (if available for download): https://jonathan-cauldwell.itch.io/fun-park-zx81

Commercial / Public Domain / Freeware / Other - please specify? Commercial

It runs on my EO (v1.39) with 1K or 16K ram configured and standard ROM

It's been over 40 years since I last wrote a game for the ZX81 and I was feeling nostalgic....
so here's my attempt at a simplified version of '3D Death Chase' for the ZX81.
It's just a few hours of work and getting back to the Z80 instruction set and the modern assembly devtools available now

but it was mostly an itch that needed scratching for me, and a bit of weekend retro fun.

Name of Software: K-MAN
Author: Johan "Dr Beep" Koelman
Release Date: 11/02/2024
Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 1K lowres
Commercial / Public Domain / Free ware / Other - please specify? Freeware

Description:
1K pacman
Downloadlink:
Source:
Manual:
After loading define your controls.
When the STAR appears press Newline to start a game, also restart new game
Ghost eating is 100, 200, 400 and 800 points per powerpill

Name of Software: DALEKS
Author: Johan "Dr Beep" Koelman
Release Date: 17/02/2024
Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 1K lowres
Commercial / Public Domain / Free ware / Other - please specify? Freeware

Description:
A game were you must dodge daleks.
Downloadlink: Source: Manual:
DALEKS

I got a joke about an ASCII-sign on the internet and thought I
could make a CSSCGC-entry from it. On the ZX81 that sign is not available
but I noticed the ressemblence of a Dalek in the pound-sign.

I did not join this month LOVEBYTE.PARTY but thought of a 256 bytes
game (sysvar and screen included) on tape for a ZX81.
I was thinking of a spacetravelgame but as a sidewayscroller.

You play Dr Who, nicely indicated with a questionmark and you must dodge
incoming daleks. Easier said than done. The game is a bit delayed but still
ridiculously fast.

After loading the game will start immediately. This is needed
or else registers will have wrong startingvalues.

Controls are QWERT for up and ASDFG for down.
HJKL Newline to start

The size of the code is displayed in the hiscore.

Name of Software: K-MAN
Author: Johan "Dr Beep" Koelman
Release Date: 06/03/2024
Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 1K lowres
Commercial / Public Domain / Free ware / Other - please specify? Freeware

Description:
1K pacman NOW WITH BONUS LIVE EACH 10.000 points


Downloadlink: Source: Manual:
After loading define your controls.
When the STAR appears press Newline to start a game, also restart new game
Ghost eating is 100, 200, 400 and 800 points per powerpill
Each 10.000 points 1 extra live.
Ghosts are a bit slower in 1st level