On Mittwoch, 29. März 2023 22:28:41 CEST Rhialto wrote: > On Wed 29 Mar 2023 at 21:02:26 +0200, Torsten Kracke wrote: > > Apart from what Olaf was writing there is also the demo "A Bright Shining > > Star" for CRTC-less PETs which for it's PECBM-mode uses the same technique > > as in the HI-RES program to provide pseudo hi-res graphics of 10 chars > > width by updating the video-RAM on the fly: > > > > https://www.pouet.net/prod.php?which=91735 > > Because of this demo I added a compile-time option to VICE (r43618) that > allows you to delay the vertical blank interrupt a bit. For this demo, > 16 seems to work well: when running the "real iron, non emulator" > version, the starshine at the end looks ok, or at least it doesn't have > the extra horizontal lines to its left that it had before. > > The option is by default off because it adds overhead that is totally > unneeded in 99,9999% of the cases. It's amazing what people now do with the PET. I admit I was playing with writing a demo or simple game to show off CRTC manipulation during "rasterline interrupt" myself, but I would have never been able to pull off what they did. In a way I did it before it became popular recently, but only as PoC and not as real demo...: http://www.6502.org/users/andre/hwinfo/crtc/pet/index.html btw, here's the result of my (and other people's) analysis of the static PET timing: https://forum.vcfed.org/index.php?threads/commodore-static-pet-early-dynamic-pet-video-timings.1242511/ AndréReceived on 2023-03-31 00:00:03
Archive generated by hypermail 2.3.0.