Search found 22 matches

by spectron
Wed May 01, 2019 12:30 pm
Forum: Programming
Topic: Cost of BASIC operations
Replies: 16
Views: 979

Re: Cost of BASIC operations

Ralf wrote:
Wed Mar 13, 2019 6:33 pm
and it's big performance boost, 300%, 500% or so.
Way more than that for most compilers, especially those that only allow for Integer values (which is all you really need if you're doing a game)
by spectron
Fri Apr 26, 2019 3:37 pm
Forum: Programming
Topic: What differences in programming Spectrum and CPC
Replies: 11
Views: 711

Re: What differences in programming Spectrum and CPC

I only did one conversion from Speccy to Amstrad (Gunboat by Accolade).

That was fairly easy because it was solid(ish) 3D so most of the drawing was just horizontal lines.
by spectron
Fri Oct 05, 2018 1:13 pm
Forum: Programming
Topic: unsigned to ascii
Replies: 18
Views: 1314

Re: unsigned to ascii

As above, if it's a simple score counting down, just store it in consecutive bytes as ascii chars (48-57 decimal). To decrement the score just decrement the bottom char and if it goes to 47 ('/' char), set it back to 57 then go to the next char and decrement that. That way the score is always in the...
by spectron
Tue Aug 07, 2018 3:54 pm
Forum: Games/Software
Topic: The best classic Speccy game beginning with P: vote
Replies: 20
Views: 1894

Re: The best classic Speccy game beginning with P: vote

Juan F. Ramirez wrote:
Thu Jul 26, 2018 5:48 am
Morkin wrote:
Wed Jul 25, 2018 4:18 pm

- fireworks :)
Yes, a very nice feature! 8-)
Especially the way the last few suddenly sped up because it took less processing time :)
by spectron
Fri Jul 06, 2018 1:32 pm
Forum: Programming
Topic: Race games - how is it done?
Replies: 17
Views: 1902

Re: Race games - how is it done?

I told Psygnosis that if they wanted to see more details like dips, hills, trackside objects, other cars etc. then they'd have to pay actual money but it never got any further - for "political" reasons it didn't get a green light - but it was a fun thing to code up I remember. It was indeed fun and...
by spectron
Thu Jul 05, 2018 2:04 pm
Forum: Other Retro Stuff
Topic: Your top 5 arcade games
Replies: 23
Views: 2352

Re: Your top 5 arcade games

Defender
Defender
Defender
Defender
Defender

All other answers are wrong
by spectron
Thu Jul 05, 2018 1:57 pm
Forum: Programming
Topic: Race games - how is it done?
Replies: 17
Views: 1902

Re: Race games - how is it done?

Maybe start from this link. It's not directly Zx Spectrum related but tells quite a lot abouth algorithms. Reading it requires some effort though: http://www.extentofthejam.com/pseudo/ http://www.extentofthejam.com/pseudo/images/curves1.png This is sort of how it was done for Gameboy road rash. Tha...
by spectron
Thu Jun 21, 2018 12:28 pm
Forum: Showcase your work!
Topic: Arduino ZX-ish VGA
Replies: 3
Views: 680

Re: Arduino ZX-ish VGA

Excellent work but unless you've got dot crawl, it doesn't count :D
by spectron
Thu Jun 07, 2018 1:00 pm
Forum: Other Retro Stuff
Topic: BBC micro differences and similarities
Replies: 33
Views: 2943

Re: BBC micro differences and similarities

Non-interesting fact No.1 I wrote my first game on the Spectrum simply as an effort to get enough money for a BBC Micro and a copy of Planetoid (although it was originally called Defender until renamed for fear of copyright issues) https://www.youtube.com/watch?v=9f5Hzm7B4xU&t=5s My ploy worked beca...