Sinclair ZX80 / ZX81 / Z88 Forums

Few years ago we had a major rearrangement of the z88dk project directory. It had the immediate benefit of including a good portion of the newlib into the classic library, plus a transparent switch between the sccz80 and the sdcc compiler engines and other similar goodies. Dominic took also the oppo...

I have vague memories HL' being used somewhere in ROM, I'm not totally sure, though, .

You may be right, there are several elements affecting the frame counter accuracy, even (in a small percentage) the hardware ceramic resonator.
I never tuned the z88dk timer functions on the zx81 for this reason, but if it's clearly perceived then it's time to check it more carefully

I totally agree.

Well, the video shows a nice shoot-em-up game, nice work really.

4inarow 2007-Oct-25
by Joseph Larson (c) 2008
based on a BASIC game by James L. Murphy
as found in 'More BASIC Computer Games' by David H. Ahl (c) 1979

Noting really special, but I built a working version for the zx81, here it is.

I think I understood, it makes it closer to mastermind. I remember little on the way we played it when we were kids, I think sometimes we didn't mention which type of boat was sunk. I'd like to evolve this game, e.g. Making a graphics version but once compiled it has serious stability issues which m...

Battleship.
This game was a 2008 Cymon's Games game, I used z88dk to port it to ZX81
Source code in C: https://github.com/z88dk/z88dk-ext/blob ... ttleship.c

Enjoy,
Stefano

Saomeone says that good programmers were those ones writing only readable and maintainable code.
They are SORT OF right, but sometimes a trick really makes the difference.

The numeric conversion trick is very cool, BTW !

Parents, they knew us better than ourselves.