Re: Troubleshooting EGA card on a NuXT

Posted on 2023-09-29, 07:18

by

by jal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Memory conflict with the ROM? Something else trying to load at that same address? XT-IDE? I tried disabling the search for extension ROMs after F0000 (where the XT-IDE ROM resides), but to no avail. You're getting a screen or looking at POST codes? Does the BIOS emit POST codes, and you confirmed …

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Troubleshooting EGA card on a NuXT

Posted on 2023-09-28, 18:16

by

by jal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This is a long shot, but anyway... I've purchased an EGA card ( this one , looking exactly like Vlask's Paradise Systems PEGA2A) on eBay which the seller said they've tested. When I tried it in my NuXT however, the computer doesn't boot. It hangs right after the memory check. According to the BIOS …

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Programmer's Guide To PC & PS/2 Video Systems

Posted on 2023-05-02, 13:28

by

by jal

in Marvin \ Video

in Marvin \ Video

For those interested in the very old video adapters of yore, I've recently digitized the "Programmer's Guide To PC & PS/2 Video Systems" by Richard Wilton, from 1987. It covers MDA, CGA, Hercules, EGA, MCGA, VGA and Hercules InColor. It can be found here , at least until I've found a better location …

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Re: DOSBox game blaster emulation vs. SAAYM

Posted on 2023-03-07, 10:30

by

by jal

in DOSBox General

in DOSBox General

I've also tested with DOSBox Staging, and it does get the pitch correct. Hopefully the patch can make it into an "official" DOSBox release.

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Re: DOSBox game blaster emulation vs. SAAYM

Posted on 2023-03-05, 20:19

by

by jal

in DOSBox General

in DOSBox General

Thanks, I'll check out the SVN. Funny this patch was from 2014, committed three years later, and still not in an official build 😀.

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Re: DOSBox game blaster emulation vs. SAAYM

Posted on 2023-03-05, 14:27

by

by jal

in DOSBox General

in DOSBox General

Ah, thanks for the confirmation! I'll see if I can find where the problem lies in the DOSBox source code. It's quite annoying that my development (which I mainly do in DOSBox) sounds different than the real thing (my NuXT with SAAYM).

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DOSBox game blaster emulation vs. SAAYM

Posted on 2023-03-04, 20:47

by

by jal

in DOSBox General

in DOSBox General

I recently purchased an SAAYM sound card from TexElec, which sports two SAA1099s and should be Gameblaster / CM/S compatible. However, I noticed after writing a quick test program that in DOSBox the notes play a lot higher (8 halfnotes to be precise). Is this a known inaccuracy? If not, is there any …

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Re: Scaling in text mode

Posted on 2023-03-03, 09:48

by

by jal

in DOSBox General

in DOSBox General

It seems nobody has a 4K monitor, since DOSbox starts up tiny, too tiny for my own old eyes. DOSbox-X can scale text mode just fine, why can't the normal DOXbox??

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Re: Guide to the DOSBox debugger

Posted on 2023-02-27, 10:27

by

by jal

in DOSBox Guides

in DOSBox Guides

videogamer555 wrote on 2023-02-21, 05:23: Wait how is that an extra feature? If the heavy debug version takes AWAY the ability to use INT 3 breakpoints, that seems like it has FEWER features. Like I said in that other thread, debuggers use INT 3, not programs themselves. You are confused about INT …

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Re: DOSBox debugger

Posted on 2023-02-27, 10:25

by

by jal

in DOSBox Development

in DOSBox Development

The solution is to allow INT3 or INT 3 break points to cause the debugger's execution of the code to stop. INT 3 only causes the debugger to halt execution because debuggers hook that interrupt, and put INT 3 in the code when you set a breakpoint. DOSBox debugger is not a traditional debugger …

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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Posted on 2023-02-13, 09:45

by

by jal

in Marvin \ Sound

in Marvin \ Sound

That's quite cool, but not as cool as the real deal 😀.

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Re: Tandy 3 Voice Sound - SN76489 ISA Soundcard Project

Posted on 2023-02-10, 13:55

by

by jal

in Marvin \ Sound

in Marvin \ Sound

Great to hear this project's still alive. Would love me a Tandy sound card, if only so I can add Tandy sound to my Rick Dangerous 2 port/rewrite 😀.

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Re: Fixing the Roland CM-500 Vibrato Bug

Posted on 2022-10-06, 15:10

by

by jal

in Marvin \ Sound

in Marvin \ Sound

For some reason, Hackaday now also got wind of it.

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Re: Scaling in text mode

Posted on 2022-08-04, 14:28

by

by jal

in DOSBox General

in DOSBox General

Mmm, having no success, seems opengl output is ignored. Will have to check how to get this working...

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Re: Scaling in text mode

Posted on 2022-08-04, 13:19

by

by jal

in DOSBox General

in DOSBox General

Ok thanks, will check it out.

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Re: Scaling in text mode

Posted on 2022-08-04, 12:38

by

by jal

in DOSBox General

in DOSBox General

Ah, that's what causes it, thx. So the opengl stuff is only in the SVN?

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Scaling in text mode

Posted on 2022-08-03, 14:45

by

by jal

in DOSBox General

in DOSBox General

I didn't want to necro this old topic , so starting a new one. My question: how to scale the DOSbox window when in text mode. The 2010 answer of using "forced" doesn't seem to work. The reason for wanting to scale is for playing DOS 160x100x16 games like Round42, and my own 160x100x16 version of …

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Re: New case for new retro XT

Posted on 2022-08-02, 08:13

by

by jal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks, also something to look out for.

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Re: New case for new retro XT

Posted on 2022-08-01, 15:18

by

by jal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Cool, thx, I'll check them out.

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New case for new retro XT

Posted on 2022-08-01, 13:05

by

by jal

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've recently purchased a NuXT 2.0 , and I'm looking for a case (ideally including an ATX power supply). I have a hard time finding a nice desktop (instead of tower) mini ATX case that also allows a 5 1/4" drive on the front. Do they even exist anymore? I really don't like a tower, XTs were meant to …

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