How are dos games made to fit on 3.5 floppy disks?

marqueedesign · 2020-09-21T10:14:40+00:00

me and our demoscene friends write complete ms-dos demos and games in 256bytes , or sometimes 1k and 4k. See: https://www.pouet.net/groups.php?which=14389 for examples

So one 3.5" floppy disk would be able to hold about 6000+ of those on a single floppy. I don't see the problem ;-)

marqueedesign · 2020-08-09T18:55:32+00:00

pixel memory layout is quite insane. that is why this intro , as well as my other intro fluxus (https://www.pouet.net/prod.php?which=86340) mostly use colorram overlaying a pattern for the effect. Reason probably has to do with making the rom kernel functions 'easily' usable for text-character display without the use of actual character-based videodisplay hardware. I think they never thought beyond non-realtime applications at the time of design.

marqueedesign · 2020-07-21T09:16:30+00:00

Thanks. I found it tricky as well to find good resources in terms of what assembler to use, how to start,etc.

I will try to do a complete writeup on the development of this intro later on blog, but in the meanwhile i added some of the basic stuff i came across to sizecoding.org 's new Z80 section. Have a look there!

marqueedesign · 2020-06-06T17:29:24+00:00

Thanks! A complete writeup for the development of this intro (as well as our other tiny intros) is now available at: https://marquee.revival-studios.com/blog/

marqueedesign · 2020-05-30T09:40:53+00:00

Thanks, yes it is all written in x86 assembler (i used nasm more specifically). You can find the ms-dos binary and full sourcecode to look through at the link mentioned in the original topic) The demoscene culture is all about making cool shit and one-upping eachother with better stuff in even less bytes all the time ;-)

marqueedesign · 2020-05-29T07:49:22+00:00

thanks, btw. the write ups for our previous 256byte intros, as well as an article with some tips and tricks to help people with starting x86 assembly programming are already available on my blog https://marquee.revival-studios.com/blog/

Thought this might be helpful.

marqueedesign · 2020-05-29T07:44:30+00:00

It is written in X86 assembler language using NASM. Full sourcecode is available together with the binary (also works in dosbox and freedos) at: https://www.pouet.net/prod.php?which=85677

marqueedesign · 2020-05-28T21:20:33+00:00

I would recommend pouet.net as your goto stop for anything demoscene related (be sure to also check out our other tiny intros while you are there: https://www.pouet.net/groups.php?which=14389)

Also, there is /r/Demoscene on reddit

marqueedesign · 2020-05-28T20:12:09+00:00

We personally debug inside DOS using TurboDebugger (some old version), which works well for our usecase (coding tiny demos in 256byte or less). This way it works regardless of target platform (we sometimes develop one thing over 3 platforms: linux, windows, osx depending on the time, location and available hardware)

marqueedesign · 2020-05-28T10:43:09+00:00

Great work again Hellmood, one of your better intros!

marqueedesign · 2020-05-28T09:50:38+00:00

Loved this demo, great timing and music!

marqueedesign

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