Search found 27 matches

by Bukster
Tue Mar 12, 2019 7:38 am
Forum: Welcome Area
Topic: Hi from Brisbane.
Replies: 4
Views: 260

Re: Hi from Brisbane.

There's quite few of us still working on ZX81 games so you'll find there's quite a lot you can do with them now.

I'm from New Zealand myself, so same global area.
by Bukster
Sat Feb 16, 2019 7:27 pm
Forum: Development
Topic: Generating a hi res display using flat assembler
Replies: 6
Views: 314

Re: Generating a hi res display using flat assembler

The ULA looks for bit 15 of the address line. That explains it. Thanks.

I changed the line

LD HL,SCREEN_DATA-$21

to

LD HL,SCREEN_DATA+$8000-$21

It worked first time. So that was ten seconds work to fix it. I knew I was on the edge of success.
by Bukster
Sat Feb 16, 2019 1:56 am
Forum: Development
Topic: Generating a hi res display using flat assembler
Replies: 6
Views: 314

Generating a hi res display using flat assembler

I've been trying to produce a Hi Res system so I can try my hand at hi res games next. I've copied some published hi res routines to make my own basic hi res on the flat assembler FASMW-ZX. Have a play with it until I get the hang of it and then try programming something using it. The system to swit...
by Bukster
Thu Jan 24, 2019 8:04 am
Forum: Welcome Area
Topic: Hello from Germany
Replies: 5
Views: 364

Re: Hello from Germany

Welcome aboard.
by Bukster
Tue Jan 15, 2019 6:48 am
Forum: Development
Topic: 3-lace
Replies: 8
Views: 1276

Re: 3-lace

Yes, the source is made in ZX-IDE (flat assembler), sorry I forgot to mention that. What do you mean by 'none'? The simple stair-step pattern is made in WRX mode, I was too lazy to make source for pseudo-hires. This is only a quick proof of concept. I was secretly hoping I could use this for my nex...
by Bukster
Sat Jan 12, 2019 9:09 pm
Forum: Development
Topic: 3-lace
Replies: 8
Views: 1276

Re: 3-lace

Thanks for the source code. I've been able to compile it with Flat Assembler. As you predicted, it does not work with an emulator.

So I take it the 'none' mode is just straight pseudo hi-res?
by Bukster
Tue Jan 01, 2019 8:49 pm
Forum: Development
Topic: Smooth horizontal scrolling
Replies: 6
Views: 1154

Re: Smooth horizontal scrolling

I've just uploaded a version of the game Berzerk where the screen scrolls when you exit so I have already written scroll up, down, right and left scroll routines. They are for the entire screen, but could be easily modified. Have a look at the video if you like and see if the scrolling is smooth eno...
by Bukster
Fri Dec 28, 2018 7:57 am
Forum: GAMES
Topic: Berzerk for the ZX81
Replies: 2
Views: 753

Re: Berzerk for the ZX81

Thanks,

Try this link for an MP3 file. This will run on both a standard 16k ZX81 or one with a Chroma interface.

https://www.mediafire.com/file/2k2x5dfu ... K.mp3/file

It's a personal rule I have that everything I program must run on the original hardware.
by Bukster
Fri Dec 28, 2018 2:11 am
Forum: GAMES
Topic: Berzerk for the ZX81
Replies: 2
Views: 753

Berzerk for the ZX81

I've uploaded a final version of ZX81 Berzerk. So it looks like it's the last game of 2018 rather than the first of 2019 to be published. The final version features eight mazes. I've added difficulty levels that mimic the way levels went up in the original game. Robots do not shoot at first, but thi...
by Bukster
Tue Dec 25, 2018 5:19 am
Forum: Development
Topic: ZX81 Berzerk Game
Replies: 3
Views: 493

Re: ZX81 Berzerk Game

It's probably blasphemy to program on Christmas. However, I have managed to get the robots to fire on the diagonals. The aim isn't perfect, but its good enough to keep any player on their toes. I've also put in difficulty levels. The original game became more difficult as the stages increased, shoul...