Krill information 180 glöps
- general:
- level: user
- personal:
- first name: Gunnar
- last name: R.
- cdcs:
- cdc #1: HAM Eager by Platon
- cdc #2: The Legend of Sisyphus by Andromeda Software Development [web]
- demo Commodore PET PETpeeve by Rabenauge [web] & Plush [web] & Crest
- Hellfire: Hmm, have you tried it? :) It should "work", as in not crash, run to the end, but look somewhat broken on the way. The main difference is that 8096 has just 2K of video RAM, not 8K as 8296 has.
As it is, the demo pretty much demands a 8250 (or SFD-100I) drive to work, but the final version shall support more drive models plus those pesky SD-card mass storage devices (as far as the slow-ish standard bus protocol permits). - isokadded on the 2025-10-24 22:06:58
- demo Commodore PET PETpeeve by Rabenauge [web] & Plush [web] & Crest
- We had to rush things a lot, so... watch out for the final version! =)
Here's a short breakdown of how the bitmap/rasters+samples stuff works:
CRTC allows character lines to be just one raster line high. Problems to solve then are best-fitting bitmap byte patterns to whatever is available in the first line of the fixed font's chars, a bit of strategic CRTC register massage to get more than 128 "char"lines per videoframe, and setting an arbitrary display pointer each raster line.
The latter two problems became a lot easier once we came across "The Amstrad CPC CRTC Compendium", so we could build on decades of prior research done by the CPC scene.
(The Commodore/MOS CRTC variant also seems to relate very closely to the easier not-so-quirky Motorola variant rather than the not-so-easy 2nd-source variants also found in CPCs.)
The samples are driven using the VIA chip's shift register, which allows for clocking out "something like" 7.8 KHz 4-bit PCM samples at 125 KHz (8 µs per bit) in the form of pulse-trains of 16 pulses per two rasterlines, with one shift register update per rasterline.
(This is closer to pulse-density modulation than pulse-width modulation, so more-or-less harmonic quantisation noise is spread a bit around the spectrum rather than accumulating at some tinnitus carrier frequency.)
Both CRTC video registers and shift-register audio updates are interwoven in a rasterline-pair-based loop, so the cost of context-switching via interrupt handlers etc. is avoided.
(Double-rasterline not only because of the 7.8 KHz samples, but also because having some ordered dithering on the single shade of green seemed like a good idea.) - isokadded on the 2025-10-08 00:41:40
- demo musicdisk Atari ST STay4Evr by Cream [web]
- Impressive SID rendition on YM, but
Quote:this alone is worth the thumb already. =D-the basic is a full functional c64 basic. no 6502 emulation. the entire kernal has been reassembled and translated to 68k code.
- rulezadded on the 2025-08-12 00:41:19
- intro Atari STe VibeCoding by Defence Force [web]
- For trolling the trolls.
- rulezadded on the 2025-07-07 14:12:08
- demotool Linux Windows MacOSX Intel Copper Showdown Editor by Akronyme Analogiker & Finity Games
- Hooray for no-CPU demoing! \=D/
- rulezadded on the 2025-05-23 15:48:26
- 8k Windows Dune by Alcatraz [web]
- Short, concise and to the point awesomeness.
- rulezadded on the 2025-05-18 15:21:08
- demo Amiga AGA entropy chamber by Logicoma [web]
- Finally proper smooth 3D on AGA!
Effect-wise, it seems to be a bit of a one-trick pony, but it's a very pretty pony. - rulezadded on the 2025-05-10 17:57:01
- 4k C16/116/plus4 chromatic admiration by Resource [web] & Logicoma [web]
- Great +4K!
- rulezadded on the 2025-05-10 17:05:35
- demo Amiga OCS/ECS 3D Demo 3: The Last Drop by Lemon.
- Hitting hard and fast, and screw baroque transitions.
Impressively polished early-1990s throwback that yet feels modern.
And that epic soundtrack on disk 2 is the bomb! Makes me watch the demo again and again. =) - rulezadded on the 2025-05-06 09:03:43
- demo Amiga AGA Skywards by Darkage [web]
- Fun demo. Love the crazy Monty Python collage style.
- rulezadded on the 2025-04-27 21:15:11
account created on the 2002-07-18 17:28:28