Log inRegister an accountBrowse CSDbHelp & documentationFacts & StatisticsThe forumsAvailable RSS-feeds on CSDbSupport CSDb Commodore 64 Scene Database
You are not logged in - nap
CSDb User Forums


Forums > C64 Coding > Demo Flash-ROM
2013-04-11 08:22
Krill

Registered: Apr 2002
Posts: 2980
Demo Flash-ROM

Vanilla C-64 demo compo requirements aside, how should a hypothetical flashable demo ROM look like?

From the top of my head, features such as auto-boot, IRQ- and fastloader, networking (at least via serial), floating and fixed point maths routines (including a few handy look-up tables), pseudo random number generator, decompressors (RLE and LZ), code generator, simple script interpreter, PAL/NTSC detection, stable raster routines, keyboard/joystick/mouse input, and memset/memcopy/memmove are required.

What else would be on your list?
2013-04-11 08:42
enthusi

Registered: May 2004
Posts: 677
depending on the demo-for-dummies factor: set_VIC_bank/char/screen -routine.

If space is left some unrolled erase_bitmap routine and/or some fast d800-shifter.

Pixel-plot tables.

Tapeloader \o/ (ROM is most fun when no disk drive is connected, no?)
2013-04-11 09:06
Mr. SID

Registered: Jan 2003
Posts: 424
How big of a ROM are we talking? Just a replacement for BASIC and KERNAL? Or something with bank switching?
2013-04-11 09:35
Krill

Registered: Apr 2002
Posts: 2980
As you like :)

Some additional RAM is also thinkable, if only for VSP-safe code.
2013-04-11 09:38
Frantic

Registered: Mar 2003
Posts: 1648
A demo maker. ;)
2013-04-11 10:01
Oswald

Registered: Apr 2002
Posts: 5094
onboard DMA would be nice, and a lot of memory, so the demo contents can be read from flash rom. I cant be arsed to think on what routines it should, as it's flashable, and 99% of a top notch demo part has to be built up from the ground anyway, generic routines are slow.
2013-04-11 11:00
Krill

Registered: Apr 2002
Posts: 2980
Not all demos and effects are optimized for speed. Having used some handy ROM routines in 4Ks myself, and missed some others, i was just wondering what other ROM stuff people might find useful.
2013-04-11 11:08
enthusi

Registered: May 2004
Posts: 677
Oh, Id be strictly against any kind of DMA!
2013-04-11 11:09
Krill

Registered: Apr 2002
Posts: 2980
Agreed, DMA would be a little too much.
2013-04-11 11:42
chatGPZ

Registered: Dec 2001
Posts: 11386
hardware 4x4 and movelist accelerator =P
2013-04-11 14:33
Mr. SID

Registered: Jan 2003
Posts: 424
Unrolled code for drawing lines (ORA and EOR) for each x1/y1 -> x2/y2 pair.

:)
RefreshSubscribe to this thread:

You need to be logged in to post in the forum.

Search the forum:
Search   for   in  
All times are CET.
Search CSDb
Advanced
Users Online
csabanw
iAN CooG/HVSC
algorithm
Guests online: 108
Top Demos
1 Next Level  (9.7)
2 13:37  (9.7)
3 Mojo  (9.7)
4 Coma Light 13  (9.6)
5 Edge of Disgrace  (9.6)
6 What Is The Matrix 2  (9.6)
7 The Demo Coder  (9.6)
8 Uncensored  (9.6)
9 Comaland 100%  (9.6)
10 Wonderland XIV  (9.6)
Top onefile Demos
1 No Listen  (9.6)
2 Layers  (9.6)
3 Cubic Dream  (9.6)
4 Party Elk 2  (9.6)
5 Copper Booze  (9.6)
6 Dawnfall V1.1  (9.5)
7 Rainbow Connection  (9.5)
8 Onscreen 5k  (9.5)
9 Morph  (9.5)
10 Libertongo  (9.5)
Top Groups
1 Performers  (9.3)
2 Booze Design  (9.3)
3 Oxyron  (9.3)
4 Triad  (9.3)
5 Censor Design  (9.3)
Top NTSC-Fixers
1 Pudwerx  (10)
2 Booze  (9.7)
3 Stormbringer  (9.7)
4 Fungus  (9.6)
5 Grim Reaper  (9.3)

Home - Disclaimer
Copyright © No Name 2001-2024
Page generated in: 0.068 sec.