Spectrum Computing

15 - Elevator Action
2 - Fat Worm Blows Sparky (or something like that)

Bedazzle wrote: ↑Wed Oct 02, 2019 4:58 am What about megalz packer?

https://github.com/emmanuel-marty/lzsa/ ... /README.md

Here is quite handy chart showing compression/speed ratio.

This is partially for something I'm working on, but interested too, because I can't think of many. Can you name some well-known short beeper effects?* I'm not referring to music, unless it's incredibly simple. Things like the pitchbend as the boot descends in Manic Miner. *If you're a programmer, a...

The speed looks quite good to me, same as LDI/LDIR. CPI/R seem less likely to be used in fast game loops anyway. Well, LDI decreases/increases 3 16bit registers, does one memory read, one memory write. CPI decreases/increases 2 16bit registers, does one memory read and register comparison. I was ju...

R-Tape wrote: ↑Thu Sep 26, 2019 8:02 pm Has anyone ever actually used these instructions?

No, I usually try to find things by faster way than by CP*(R).

Seriously, aren't the instructions rather slow ?

AFAIK native LZ packers use the CPIR/CPDR as fast way to find match candidate.

Thing is I don't want to see ZX Dev to die. That is all.
I could run something simulace this year And see what happen.

What happened with Zx Dev compo? Wasn't it annual ? I gave up organising it as it was too much time and effort and also tired of some other things, besides real life is currently super busy :/ Fair enough. Yeah, real life can be super busy. Btw. Were you considering to find another organizer ?

What happened with Zx Dev compo? Wasn't it annual ?

ApLib uses "last offset" feature that improves a lot compression of structured data. Exomizer has better offset-matchlen encoding, that is why it will be better with more general test data suite (Canterbury etc).

As a matter of fact, in practice text blocks would be typically much smaller, because whenever a Spectrum program contains a lot of text, it's better to use simpler text compression strategies and avoid data block compression altogether... I agree. Typical text message would be just few lines of te...

Also, isn't there "inspired by/clone of" tag ? That could explain some of non-zx entries.

Even though it's rare that there isn't enough memory to store a custom font in RAM, I like the idea of making the ROM font look better on the fly. The best known method must be using RRA and OR to make the font bold, I tweaked it slightly by only bolding the left hand side (RRA > AND 240 > OR (hl)....

Morkin wrote: ↑Sun Jun 09, 2019 5:21 pm

Nice...

Oh, how I could miss the english release ? Going to play it tonight.

This is great information, what about when a row changed graphics, how did this work (see image attached) https://i.postimg.cc/QV52x0Ym/477-F1004-3551-4-BD4-AE07-EB5-BA0351-DB3.jpg By loading values in the middle of line. push bc ; 89d2 c5 $0bts push af ; 89d3 f5 $0bts push de ; 89d4 d5 $0bts push ...