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VGA behavior when V. Display End >= V. Retrace Start

Posted on 2024-01-23, 10:08

Other than the usual things you can expect in such a situation (such as some monitors losing sync) - could this also result in garbage/unexpected *content* from VRAM being displayed? Not that this is a very useful thing to do... but I've seen this happen on the internal plasma display of a PS/2 …

Re: MartyPC

Posted on 2024-01-17, 09:48

in PC Emulation
Man... from what I'm seeing of this Windows Defender false-positive situation, it's simply infuriating. If MS keeps up its policy of apparently not giving a crap whatsoever, I suppose it's possible for affected developers to pool together and attempt a collaborative heuristics project - perhaps that …

Re: MartyPC

Posted on 2023-12-21, 10:58

in PC Emulation
Yes, it's been known that changes to the Mode/Color Select registers take effect immediately; making it otherwise would probably have complicated the CGA's design (additional latches?), to no benefit that I can think of. As GloriousCow points out, we relied on that in Area 5150 - at least one effect …

Re: MartyPC

Posted on 2023-12-16, 16:56

in PC Emulation
I hate to ask but would you consider a conversion of this bat file to python or sh for our linux and mac friends? Someone has already forked it and added a Python version. Haven't had the chance to test it myself, but it's at https://github.com/vegardsjo/FFmpeg-CRT-transform. I really should've …

Re: MartyPC

Posted on 2023-12-16, 16:50

in PC Emulation
jal wrote on 2023-12-15, 10:30: Scali wrote on 2023-12-12, 16:34: Yea, isn't that the thing with software engineering... You need to build something to figure out how you should build it. Lol, yeah, quoted for truth 😁. JAL Quite a bit of my code in Area 5150 is living testament to this principle... …

Re: MartyPC

Posted on 2023-12-11, 14:59

in PC Emulation
You are correct, I did that to try to tell where the hell the display border was. Since the 'padding' area is now a custom color, I've already changed it back to pure black. I've actually got a plan to make the palette customizable. Was thinking about how I wanted to switch between the "standard" …

Re: MartyPC

Posted on 2023-12-10, 06:08

in PC Emulation
As for resizing widgets, I'd like to make any widgets resizable if it makes sense to do so, like the disassembly and instruction history and memory viewer should definitely resize to show you as much as you want to see. It's just a bit trickier - the immediate-mode flow is normally that you send …

Re: MartyPC

Posted on 2023-11-28, 14:47

in PC Emulation
Eventually i'd like to implement librashader https://snowflakepowe.red/blog/introducing-librashader-2023-01-14 which is a nice rust-based solution that would give MartyPC access to all those tasty Libretro shaders. Those will likely run in a full window. The nice thing about MartyPC's built in …

Re: MartyPC

Posted on 2023-11-19, 20:16

in PC Emulation
I guess I should be pleased that you are asking that. It's not an existing one, I thought I'd make my own. Right now it's pretty simple, just some barrel distortion with rounded corners, and scanlines. I'll be slowly adding features to it, but it wasn't even planned for 0.2 to have any shader …

Re: MartyPC

Posted on 2023-11-15, 05:08

in PC Emulation
Posting a sneak peek of MartyPC 0.2.0. I've implemented a lot of people's suggestions, as well as dozens of bug fixes and many fundamental accuracy improvements derived from my recent hardware research. Scali, I finally figured I could do a video of 8088MPH justice, so here it is (in 1440P): …

Re: Is Canabalt DOS demake possible?

Posted on 2023-11-01, 13:04

in Milliways
Yup, something like the Spectrum game could be done on an XT with no problem. It could be outdone by a fair bit actually, but it's the C64 version that was the comparison point. As for doing it with CGA... insert a "challenge accepted" for some day when I get the time, maybe. 😁

Re: Is Canabalt DOS demake possible?

Posted on 2023-10-31, 17:51

in Milliways
Yeah, a C64 is certainly much better equipped to handle this game than an original PC/XT (at least with CGA). That said... - CGA sure can scroll horizontally. It's limited to character (8-dot) increments, but the C64 version scrolls even more coarsely than that at 50 fps, and it still looks good. If …

Re: ASCII issue in DOS 7.1?

Posted on 2023-10-27, 20:40

in DOS
Probably some combination of COUNTRY.SYS, MODE, CHCP is setting a different code page. Try looking for these in your config.sys / autoexec.bat and getting rid of them, or if you're unsure post the contents of those files here.

Re: What music are you listening to?

Posted on 2023-10-27, 10:58

in Milliways
Been blasting these two on repeat: Raven - Metal City (2020) Raven - All Hell's Breaking Loose (2023) These guys are several geological eons old by now and sound like they're in their 20s! Best metal to come out in recent years \m/

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