Doctor: A new demo by Trilobit for the Atari 2600

[visyli]

8k demo with all new effects, again defining the limits of the (PAL) 2600:

 

Doctor by Trilobit

 

http://pouet.net/prod.php?which=51961

 

http://oldskool.wamma.fi/prods/3lb_doctor.rar

 

[Thomas Jentzsch]

Cool!

[Devin]

Impressive! ... and a tad crazy...

 

If I ever truly (and completely) go insane, I think this is what I will see.

[LS_Dracon]

The cube is very impressive.

[lucifershalo]

does anyone have links of the previews demo/music?

[lucifershalo]

also what is the bankswitiching code to use it with CC2

F8 doesnt work properly

[+Nathan Strum]

Nice work!

[+SpiceWare]

plasma on the VCS

[Wickeycolumbus]

Wow, very nice. Thanks for pointing that out

[Albert]

Great demo, thanks for sharing! Ran it in Stella, but will have to try it out on real hardware later.

 

..Al

[Thomas Jentzsch]

Ran it in Stella, but will have to try it out on real hardware later.

It's PAL.

[Albert]

Ran it in Stella, but will have to try it out on real hardware later.

It's PAL.

Bummer.

 

..Al

[+batari]

Impressive! ... and a tad crazy...

 

If I ever truly (and completely) go insane, I think this is what I will see.

That reminds me of that obscure 80's movie where the star was blind but had an electronic vision device plugged into his brain (based on sonar so he couldn't see a television.) He wanted to play a 2600, so he plugged it into the device, and he went on a massive head trip. I think it was this movie. But I digress - great demo.

[Wickeycolumbus]

Ran it in Stella, but will have to try it out on real hardware later.

It's PAL.

Bummer.

 

..Al

 

Do you have a Commodore 1702 monitor? Because If I adjust the V.Hold just right, I can play PAL games on it in color and with no rolling with an NTSC 2600.

[+atari2600land]

I want a .bin file, please. Stella won't play .rar files. I don't even know what a .rar file *is*.

[Wickeycolumbus]

I want a .bin file, please. Stella won't play .rar files. I don't even know what a .rar file *is*.

 

Its a type of archive file. Open it up with something like UnRarX (os x) or winRAR (XP) and you can extract the BIN files.

[+Random Terrain]

Or he could just post the .bin file in this thread to make it easier for everybody.

 

Are these techniques going to be used in future games?

[Albert]

Do you have a Commodore 1702 monitor? Because If I adjust the V.Hold just right, I can play PAL games on it in color and with no rolling with an NTSC 2600.

Yes, I have some 1702s, although they are pretty small so I typically use 20" Sony TV. I have used them in the past to test PAL games. The colors are still wrong, though.

 

..Al

[+SpiceWare]

Here's the 3 files that are in the RAR. The one ending in .txt was originally .nfo, which AA won't let you upload. It's just a text file so the extensions better as .txt

3lb_doctor_emu.bin

3lb_doctor_real.bin

3lb_doctor.txt

[moderntimes99]

Awesome! Reminds me slightly of this (one of my alltime favourite demos):

 

PWP Robotic Liberation (unexpanded Vic 20):

 

Regards,

Moderntimes99

Edited October 27, 2008 by moderntimes99

[Rom Hunter]

Simply brillant.

 

IMO the most impressive thing I've ever seen on the noble VCS.

 

[+SpiceWare]

Awesome! Reminds me slightly of this (one of my alltime favourite demos):

 

PWP Robotic Liberation (unexpanded Vic 20):

 

Regards,

Moderntimes99

That's pretty cool, didn't realize there were demos on the VIC! Looks like they were doing raster interrupts in it, but the VIC doesn't have raster interrupts... Probably doing timer interrupts to simulate raster interrupts.

 

EDIT: Yep, VIC raster interrupts are simulated by using interrupts on 2 timers - Making stable raster routines (C64 and VIC-20)

On the VIC-20, there is no Raster interrupt feature in the video chip. All you can do is to use a timer for generating raster interrupts. And if you use two timers running at a constant phase difference, you can get full synchronization. The first timer generates the raster interrupt, and the second timer, the auxiliary timer, tells the raster routine where it is running.

Edited October 27, 2008 by SpiceWare

[Impaler_26]

Awesome Stuff!

[moderntimes99]

That's pretty cool, didn't realize there were demos on the VIC! Looks like they were doing raster interrupts in it, but the VIC doesn't have raster interrupts... Probably doing timer interrupts to simulate raster interrupts.

 

EDIT: Yep, VIC raster interrupts are simulated by using interrupts on 2 timers - Making stable raster routines (C64 and VIC-20)

On the VIC-20, there is no Raster interrupt feature in the video chip. All you can do is to use a timer for generating raster interrupts. And if you use two timers running at a constant phase difference, you can get full synchronization. The first timer generates the raster interrupt, and the second timer, the auxiliary timer, tells the raster routine where it is running.

This is probably as advanced as simulated raster interrupts gets on the VIC-20, based on Marko Makela's routine(!), runs fine in winvice in unexpanded mode: happyhour.zip (Slightly off topic maybe, but I still find it interesting to compare demos between the VCS and VIC-20...)

 

Regards,

Moderntimes99

Edited October 28, 2008 by moderntimes99

[joyrex]

Awesome! Reminds me slightly of this (one of my alltime favourite demos):

 

PWP Robotic Liberation (unexpanded Vic 20):

 

Regards,

Moderntimes99

 

Yeah, mine too! I am curious about this demo, is it on youtube?