Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?

Posted on 2022-10-17, 15:08

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by christal87

in Marvin \ Video

in Marvin \ Video

Mine has an IC with a marking written 'AG02-EX' inside. I've found someone's blog online about that MacroSilicon not working with older modes, unfortunately. There's only specs I could find about it, not even a datasheet. Maybe the I2C EEPROM is missing some EDID data. Someone with an EEPROM reader …

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Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?

Posted on 2022-10-06, 15:19

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by christal87

in Marvin \ Video

in Marvin \ Video

For those that have a AIXXCO adapter working at 720x400@70, can you please open it up and check the IC inside? I think they've """upgraded""" it and it's now using a MacroSilicon MS9288C instead, which doesn't seem to be capable of handling it. Mine has an IC with a marking written 'AG02-EX' inside …

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Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?

Posted on 2022-06-30, 15:21

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by christal87

in Marvin \ Video

in Marvin \ Video

I've been really happy with the ATEN VC180, I use it to capture VGA with a HDMI capture card. It supports DOS mode just fine, even though the specs don't mention any support of those resolutions. https://assets.aten.com/product/quick_start_guide/vc180_converter_ug.pdf So the ATEN VC180 is well …

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Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?

Posted on 2022-06-22, 16:04

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by christal87

in Marvin \ Video

in Marvin \ Video

DOS prompt has this weird grey background effect, like looking at a very old TV or watching something through composite. https://cdn.discordapp.com/attachments/816507365461065790/988607568052109383/dos1.png Win 3.11 has the same issues more or less despite it's resolution. https://cdn.discordapp. …

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Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?

Posted on 2022-01-11, 09:37

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by christal87

in Marvin \ Video

in Marvin \ Video

My genuine Aixxco arrived and I also had problems with it being off-center like gen_angry reported previously. In addition to the issues with alignment with graphics modes gen_angry reported, in VGA 80x25 text mode it seems like the display is shifted right by about half a character - there is a …

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Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?

Posted on 2021-12-26, 08:28

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by christal87

in Marvin \ Video

in Marvin \ Video

Note on some "el cheapo" webcam based USB video class (UVC) HDMI capture devices: [...] most of these dongles want to look like USB3, but most are only 2.0 High Speed (HS). This means that uncompressed raw video (e.g. YUYV) will have a limitation either on framerate or maximum resolution, whichever …

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Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?

Posted on 2021-09-25, 11:55

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by christal87

in Marvin \ Video

in Marvin \ Video

Hello, I picked up that AIXXCO adapter and it arrived today, have some weird results to share. I use this for my capture card: https://www.amazon.ca/gp/product/B0813JPLNT/ KVM: https://www.amazon.com/Rosewill-RKV-2P-Desktop-Switch-Audio/dp/B004E2I3YK (from ages ago, works amazingly well btw) …

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Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?

Posted on 2021-09-20, 15:16

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by christal87

in Marvin \ Video

in Marvin \ Video

Thanks, that helps a lot. I see plenty of cheap ass converters with AG02 chip in my region's web stores. So I wonder is AG02 also good or, it has to be AG02-EX to work for DOS mode? The chip markings contain the -EX ending, but the datasheet only mentions this as an AG02. It could be the same. I'm …

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Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?

Posted on 2021-09-18, 07:20

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by christal87

in Marvin \ Video

in Marvin \ Video

There are two completely different units on sale at the link, could you clarify which one it is that you are recommending? Pick the one with the cables built in. The option "Color: VGA TO HDMI Cable". It uses a complete chinese IC solution called AG02-EX. There's an I2C EEPROM in there too. I …

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Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?

Posted on 2021-07-29, 19:32

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by christal87

in Marvin \ Video

in Marvin \ Video

Hi all ! Just received another VGA2HDMI cheap device that works great under DOS mode 70Hz ! 20200814_075848.jpg 20200814_075853.jpg I will upload a video of Doom working on it. It seems to be this one : https://fr.aliexpress.com/item/32692452101.html?spm=a2g0o.productlist.0.0.46f47ed3pf2rTs Best …

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Re: What are the best Vga to hdmi scalers or peripherals for MS-DOS games ?

Posted on 2021-07-27, 18:48

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by christal87

in Marvin \ Video

in Marvin \ Video

Hi all ! Just received another VGA2HDMI cheap device that works great under DOS mode 70Hz ! 20200814_075848.jpg 20200814_075853.jpg I will upload a video of Doom working on it. It seems to be this one : https://fr.aliexpress.com/item/32692452101.html?spm=a2g0o.productlist.0.0.46f47ed3pf2rTs Best …

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Re: HardMPU, anyone?

Posted on 2020-11-25, 08:04

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by christal87

in Marvin \ Sound

in Marvin \ Sound

Good work! But 4 second is very long time in hardware? Do you mean millisecond? Cheers, Thank you! Could be my bad. Not long for a timeout. If you think about it: the code expects the right event before this timeout ever happens. For example a default tcp connection keepalive timeout is 7200sec ( …

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Re: HardMPU, anyone?

Posted on 2020-11-24, 21:13

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by christal87

in Marvin \ Sound

in Marvin \ Sound

My case is closed, finally it works! TL;DR :) Didn't want to bring home the scope from the office so I've used the DOS utility's source code to understand what was happening. The 'wait_for_ack' function simply gets the current timestamp using the C time library and checks for 0xFE to be shifted in …

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Re: HardMPU, anyone?

Posted on 2020-11-22, 10:27

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by christal87

in Marvin \ Sound

in Marvin \ Sound

Hi I've also designed a 2 layer PCB and built one. It works fine in gsplay, Doom and Monkey Island. Unfortunately the config utility doesn't work . It quits after an ACK timeout. I traced it back to the same waiting for *DRR signal problem as Muren. I'm not using any CMOS type gates, just the …

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Re: Successfully fixed a 3DFx Voodoo2 with miscolored output

Posted on 2020-03-16, 07:39

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by christal87

in Marvin \ Video

in Marvin \ Video

It's very intermittent. As in it flashes while playing a game between green-shaded to normal. I will try and take the V2SLI out of the equation first and see what effect that has. I think the SLI has nothing to do with it, because it doesn't pass any analog video signals between cards. The card I …

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Re: Successfully fixed a 3DFx Voodoo2 with miscolored output

Posted on 2020-03-15, 19:00

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by christal87

in Marvin \ Video

in Marvin \ Video

I was going to ask this question separately, but now there's a thread for it... I have a S3 Savage4 passing through a voodoo2 SLI combo, and sometimes the color comes out green. In DOS the text will be green, and when playing a games, the colors have been green-washed but still distinguishable. …

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Re: Successfully fixed a 3DFx Voodoo2 with miscolored output

Posted on 2020-03-15, 18:17

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by christal87

in Marvin \ Video

in Marvin \ Video

That could be just the PI5c3384 gone bad or the pass-through cable shorting out somewhere etc. That's not ordinary Voodoo 2. It's Canopus 3D card with custom cable. It looks basically the same, except for the additional Scalable VGA to NTSC/PAL Encoder. It has a similar QS3L384QG output selector IC …

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Re: Successfully fixed a 3DFx Voodoo2 with miscolored output

Posted on 2020-03-15, 14:59

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by christal87

in Marvin \ Video

in Marvin \ Video

V2s have very noisy video output - I wonder if there a is a pin-compatible DAC which would yield better output? Not sure. The other question is: are they still available like the ICS? The ICS has an RSET pin to set DAC output levels on each channel by resistors to GND. Like one would have it on an …

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Re: Successfully modding a 486 motherboard to use 3.3V CPUs

Posted on 2020-03-15, 14:31

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by christal87

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

maxtherabbit wrote on 2020-03-15, 14:13: stick with the LDO and enjoy your clean power rail and stable system, switching supplies are gross Yeah I have to get very bored to go into the patience-game of filtering out ripple noise. 😀

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Re: Successfully modding a 486 motherboard to use 3.3V CPUs

Posted on 2020-03-15, 14:03

by

by christal87

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would try watching the voltage drop on a datalogging multimeter while heavily loading the CPU. The other thing comes to my mind is checking all you filter caps, especially if they all are old tantalums. Maybe try to search for unpopulated caps near the regulator and the CPU socket Vcore pins. I …

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