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Re: How do PCI IDE cards supply IRQ14 and IRQ15?

Posted on 2022-02-22, 14:18

in PC Emulation
superfury wrote on 2022-02-22, 11:40: Could it be that it usually uses an connected ISA card with just those two pins connected through a cable to supply the IRQs? Such kludges did exist in early PCI era. Later on, they got extinct - probably because motherboards already had two IDE channels, so no …

Re: Max colors from WD90C31

Posted on 2022-02-16, 18:20

So then I looked at the RAMDAC thinking that might tell me if that limits it to 256 color, making the question of the controller chip moot. That has triple 6 bit DACs so it's clearly capable, and the question still remains. Every VGA RAMDAC has three 6-bit DACs, therefore 2^18 colors - but not …

Re: Landmark Hertz

Posted on 2022-02-16, 10:54

Is it possible that an LED behind the "LANDMARK" text would only light up in deturbo mode? No LED there... AFAIK this particular system used an actual 16MHz processor. In this case, I would expect the "LANDMARK MHz" to be at least 20... unfortunately, that particular machine got upgraded to 486, …

Landmark Hertz

Posted on 2022-02-16, 10:03

I've just spotted this box: landmarkmhz.jpg ...and one thing made me chucke - the frequency "counter" marked as LANDMARK MHz The story behind Landmark "frequency" is fairly well known - it benchmarked CPUs relative to the original IBM AT, which used wait states, therefore zero-wait-states 286 clones …

Re: Just had to share. Windows 10 on flopies.

Posted on 2022-02-13, 07:49

in Milliways
Seriously, I'm wondering what's the record diskette count for a single software product? My candidate is Microsoft Office 97, with 46 diskettes. Just imagine this: shuffle around for hours with forty-six floppies, and finally... Clippy! 🤣 The Ultimate Masochist Experience 🤣

Re: ega cga vga

Posted on 2022-02-09, 16:27

BitWrangler wrote on 2022-02-09, 15:17: However, the "almost native" way to use these is CGA with a real CGA card, preferably with a composite out, then you get the artifact color modes. CGA composite output is NTSC, monitors for the European market were PAL, so no color at all here...

Re: ega cga vga

Posted on 2022-02-09, 14:38

would something like this work https://www.ebay.nl/itm/114363618169 Seems OK. But seriously, don't expect too much. Such stuff may be enough for 320x200 games, but not for 80x25 text. I can't believe you can't find a CRT VGA monitor... Anyway, while LCD monitors aren't perfect for old VGA cards, …

Re: Dual cpu/core and windows 9X/ME

Posted on 2022-02-09, 14:30

RetroGamer4Ever wrote on 2022-02-09, 13:37: ReactOS [...] it's now more or less a (general) Windows alternative [...] it can run the massive amount of pirated/cracked software What!? ReactOS is still in alpha stage, it isn't - and won't be anytime soon - an alternative for anything, and there's …

Re: Dual cpu/core and windows 9X/ME

Posted on 2022-02-09, 13:17

I just wonder about this stuff. A single core is enough for everything that was designed for Win9x. Yes, but multiprocessor support would be nice to run several things designed for Win9x simultaneously. What's so great about that OS that you want to use it for more things? :D There's nothing great …

Re: ega cga vga

Posted on 2022-02-05, 10:19

It's not just dot pitch, it's also refresh rate and interlace. VGA can do 480 lines at 60 Hz, and 400 lines at 70 Hz, all NON-interlaced. 15 kHz means about 400 lines at 60 Hz (NTSC), or 480 lines at 50 Hz (PAL), all interlaced. I live in a PAL country, and I've found the 50 Hz of Amiga color …

Re: ega cga vga

Posted on 2022-02-05, 00:51

As for VGA, that can be made to work with RGB SCART monitors and TVs as well, but it will require a scan doubler. What? Scan doubler is used to connect a 15 kHz HSYNC video source to VGA monitor ie. 31 kHz. The other way around would be "scan halfer" - and yes, such devices do exist, see eg. …

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