Search found 152 matches
- Sat Feb 15, 2014 7:49 pm
- Forum: Sound
- Topic: z80 clocks
- Replies: 32
- Views: 30152
- Thu Feb 13, 2014 11:28 pm
- Forum: Tools
- Topic: kega fusion border color
- Replies: 2
- Views: 3209
- Mon Feb 10, 2014 6:44 pm
- Forum: Demos
- Topic: Datastorm 2014 Invitation
- Replies: 5
- Views: 5372
- Tue Jul 16, 2013 10:17 am
- Forum: Demos
- Topic: All Colors
- Replies: 8
- Views: 7258
And if you use Charles MacDonald's test ROM (or the same method he used) you can show all "1536" colors including dupes :P Don't guess it's possible with the direct color DMA "mode" to finagle in a way to work with S/H? I know that you can make S/H apply to backdrop pixels, but doesn't direct color ...
- Mon Jul 15, 2013 12:30 am
- Forum: Exodus
- Topic: Disable the bilinear filtering in the VDP?
- Replies: 10
- Views: 17680
Another possible solution could be to only apply bilinear filtering horizontally, while applying nearest-neighbor resampling vertically (and locking window height to integer multiples of 240, with width locked to create an appropriate aspect ratio as Exodus already does in both video modes). This wo...
- Fri May 03, 2013 3:34 pm
- Forum: Exodus
- Topic: So... how does it run on your system?
- Replies: 64
- Views: 107134
My First Time Out demo may be a decent benchmark as well, considering I use no interrupts, so I'm constantly polling the HV counter, waiting on specific scanlines to make backdrop and scroll changes. Don't have a binary handy, if anyone goes looking there are two versions floating around, one I call...
- Sun Apr 28, 2013 2:55 am
- Forum: Megadrive/Genesis
- Topic: Cycle accurate Mega Drive emulation: Exodus coming in April!
- Replies: 106
- Views: 78832
- Tue Oct 09, 2012 1:32 pm
- Forum: Blabla
- Topic: Old computers are useful
- Replies: 8
- Views: 6131
- Mon Oct 08, 2012 10:35 pm
- Forum: Video Display Processor
- Topic: Is the raster effect (quick palette switch) useless?
- Replies: 39
- Views: 45713
Nice technique, Charles. I wonder how it would work if, instead of stuffing CRAM, one pre-loaded 64 colors into CRAM and modified VDP$07 to point to the desired colors. Less colorful, but possibly better for synchronization and/or resolution? I'm pretty sure that modifying the backdrop register bypa...
- Mon Oct 08, 2012 9:31 pm
- Forum: Demos
- Topic: Direct Color Demo using DMA
- Replies: 91
- Views: 121210
My converter now supports Riemersma dithering http://sega16.x10.mx/direct_color_converter_v_2.zip To use Riemersma dithering use -i2r or -i3r instead of -i2 or -i3 depending on the color depth that you want. Here is a sample output http://sega16.x10.mx/test3_3r.png I personally think Riemersma dith...
- Sat Jul 28, 2012 1:07 am
- Forum: Video Display Processor
- Topic: VDP Debug Register - $C0001C
- Replies: 17
- Views: 28091
- Sat Jul 28, 2012 12:17 am
- Forum: Video Display Processor
- Topic: VDP Debug Register - $C0001C
- Replies: 17
- Views: 28091
As I also wrote over at Retro, I wonder if the click could be abused (like on the Apple II) to generate basic tones or maybe even sample output, without touching the Z80 bus? Not sure how useful it'd be but it was sure useful on the 1MHz 6502, so maybe with a 7MHz 68000 (as well as DMA) it might be ...
- Thu May 24, 2012 3:53 pm
- Forum: MegaLD
- Topic: Emulating Pioneer LaserActive (Mega-LD) games
- Replies: 189
- Views: 303543
If this were a normal LD player you'd be right, but like I mentioned, the problem is that the LA passes the composite signal from the disc through a fairly torturous composite -> separate -> merge with PAC or overlay -> convert back to composite process. The GameSX article claims that the s-video m...
- Thu May 24, 2012 7:03 am
- Forum: MegaLD
- Topic: Emulating Pioneer LaserActive (Mega-LD) games
- Replies: 189
- Views: 303543
- Thu May 24, 2012 6:29 am
- Forum: MegaLD
- Topic: Emulating Pioneer LaserActive (Mega-LD) games
- Replies: 189
- Views: 303543
RGB won't really help in terms of video capture, since the disc stores composite video and the only relatively cheap RGB capture card I know of is the SweetSpot (link currently down, unfortunately), but with the RGB mod essentially just decoding the composite signal, best to just capture the composi...