Re: GLX Player the only XT player ? Check Mod Master...

Posted on 2021-08-21, 20:01

by

by root42

in Marvin \ Sound

in Marvin \ Sound

Extremely cool. What VGM does it support? SAM Coupe? Are there nice pieces supporting the SAA1099? Would it work with my Snark Barker, too? Which is CMS compatible...

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Re: WP32 McCake : MT32 compatible waveblaster board

Posted on 2021-08-18, 12:41

by

by root42

in Marvin \ Sound

in Marvin \ Sound

Dog wrote on 2021-08-18, 10:31: Out of curiosity, how hard would it be to rotate the display if a case has vertical drive bays? From Landscape to portrait display of text. As the MT32 display is landscape this would look awkward I guess.

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Re: GLX Player the only XT player ? Check Mod Master...

Posted on 2021-08-16, 06:43

by

by root42

in Marvin \ Sound

in Marvin \ Sound

I now installed the ACE software and also used beta26. Not sure which change made it work, but it works now. 😉 EDIT: RADIX.XM doesn't play properly, but I guess this is expected?

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Re: GLX Player the only XT player ? Check Mod Master...

Posted on 2021-08-16, 06:15

by

by root42

in Marvin \ Sound

in Marvin \ Sound

Hey, FreddyV, What do I need to do to get a GF1 GUS running with Mod Master XT? 2nd Reality, Scream Tracker et al all auto detect it, but Mod Master XT doesn't I think. So what is it looking for to determine that a GUS is there?

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Re: Vogons Video Announcement Thread

Posted on 2021-08-08, 14:22

by

by root42

in Milliways

in Milliways

Tonight 20:30 CEST I will do another stream. Lötstream: A Star Is Born https://www.youtube.com/watch?v=ZjcmetyyhXM

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Re: Suggested Sound card for 386SX

Posted on 2021-08-04, 14:57

by

by root42

in Marvin \ Sound

in Marvin \ Sound

I would use the SB Pro 2.0. The 386SX will have a bit of a struggle, but it can probably do stereo music in games such as Pinball Fantasies. Plus the OPL3 will sound nice in some games. Probably it will also be nice if you play X-Wing or something like that which supports stereo.

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Re: EXCELGRAPH - ISA Video Display Controller (ET4000/W32i)

Posted on 2021-08-04, 09:06

by

by root42

in Marvin \ Video

in Marvin \ Video

I will pick up my card in the next weeks and try to fix it as much as possible. However I was wondering: Can we replace the 35ns RAM with 50ns and then it will be better...? The ET4000W32I demands 50ns FPM, and the 41c16257-50K seems to be compatible. The timings are different to the 35ns variant: …

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Re: Change a game's name by one letter, to make it something completely different (just for fun!)

Posted on 2021-07-20, 14:01

by

by root42

in Milliways

in Milliways

The Secret of Donkey Island

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Re: EXCELGRAPH - ISA Video Display Controller (ET4000/W32i)

Posted on 2021-07-10, 18:44

by

by root42

in Marvin \ Video

in Marvin \ Video

root42, one additional question: do I get the right feeling that the card is rendering graphics very slow? Is the PC really slow? Do you happen to know what frequency the ISA bus is running in your machine? For instance, on my 386 DX / 33 MHz, I set the ISA bus speed to 11 MHz and Landmark Speed …

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Re: EXCELGRAPH - ISA Video Display Controller (ET4000/W32i)

Posted on 2021-07-09, 15:50

by

by root42

in Marvin \ Video

in Marvin \ Video

@aleks Here is the video of the card in action. While in Windows, I touched the RPs with my fingers to change the resistance, or maybe even impedance? It gets worse when doing that. So I guess I really need to go lower. https://youtu.be/6MuAR9k9HOc EDIT: And this is with 0 Ohm (by bridging every …

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Re: EXCELGRAPH - ISA Video Display Controller (ET4000/W32i)

Posted on 2021-07-09, 09:15

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by root42

in Marvin \ Video

in Marvin \ Video

I will post some pictures later, when I get the time. The artifacts in mode 13 are severly reduced. In Windows they are still pretty strong. 220 Ohm RPs are on their way, and I will try and use them. Desoldering is easy, thanks to my new desoldering gun. 😉

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Re: EXCELGRAPH - ISA Video Display Controller (ET4000/W32i)

Posted on 2021-07-09, 05:21

by

by root42

in Marvin \ Video

in Marvin \ Video

Get Art of Electronics book. Good tome for designing electronics and any books on designing 50-100MHz buses and signal lines. And study high speed signal designs that are properly done. Your PCB lacks extra electronic components to guarantee the digital signal quality needed for the chipset, vram …

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Re: EXCELGRAPH - ISA Video Display Controller (ET4000/W32i)

Posted on 2021-07-08, 19:00

by

by root42

in Marvin \ Video

in Marvin \ Video

So I replaced the 300 Ohms with 270 Ohms and the artifacts were severly reduced. However it is still not good. Monkey Island 2 has a few noise columns, while Windows has lots of stray pixels. This is still far from usable. I think I will have to chalk this project up to experience... Is there any …

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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Posted on 2021-07-03, 07:58

by

by root42

in Marvin \ Sound

in Marvin \ Sound

Didn't some russian guy already made GUSAR that was basically an IW card initially cloning Argus and then moved to their own design? Not a PCB design that he's shared and the PCBs are no longer available to purchase :( Indeed. I have one, which Shock repaired for me, because I botched the soldering …

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Re: Vogons Video Announcement Thread

Posted on 2021-06-30, 06:57

by

by root42

in Milliways

in Milliways

Hey long time no vid good to see you back! Yes, quite a lot of other things on my hands, plus the ET4000W32i isn't working yet. But I will pick up speed in a couple of weeks when things have settled down again. :) Plus I only announce MS DOS / PC related content here, but there were some non-PC …

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Re: Vogons Video Announcement Thread

Posted on 2021-06-29, 16:54

by

by root42

in Milliways

in Milliways

Let's Code MS DOS 0x1D: Melting the VGA Screen One of the effects that is easy to do on machines like the C64 or Amiga is the „melting screen“. In theory you can do such things just by copying lots of pixels in video memory. However the VGA is rather slow for doing that. So what we will do instead …

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Re: EXCELGRAPH - ISA Video Display Controller (ET4000/W32i)

Posted on 2021-06-26, 19:18

by

by root42

in Marvin \ Video

in Marvin \ Video

That explanation sounds very reasonable. Waiting for my desoldering station to arrive so I can swap out the resistors... I guess I will have to acquire more ICs and wait for the next board revision as well. 😀

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Re: EXCELGRAPH - ISA Video Display Controller (ET4000/W32i)

Posted on 2021-06-26, 04:57

by

by root42

in Marvin \ Video

in Marvin \ Video

@ALEKS: I measured the signal on the top resistor array. It was 10 MHz, so I guess my 200MHz scope should be able to show it in at least somewhat reasonable detail. I think the signal looks a bit wavy with a pretty slow rising signal, almost sawtooth like. And there is this small bump at the bottom. …

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Re: EXCELGRAPH - ISA Video Display Controller (ET4000/W32i)

Posted on 2021-06-23, 08:25

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by root42

in Marvin \ Video

in Marvin \ Video

And how much time does assembly take - roughly, and after one or two successful builds for practice? I still don't think this sounds awful, given that it would provide one of the best possible graphics solutions for ISA-class machines with none of the usual issues with such old hardware. If …

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Re: EXCELGRAPH - ISA Video Display Controller (ET4000/W32i)

Posted on 2021-06-23, 08:09

by

by root42

in Marvin \ Video

in Marvin \ Video

The biggest costs are the ET4000W32i chip (I paid 20€ per piece after customs from questcomp), the RAM and the RAMDAC. PCBs are less than 10€ at JLC. At the moment a full kit is roughly 100€. If we can get the ET4000 chips for cheaper that would help. But I doubt we get it lower than 80-90€ BOM cost …

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