Re: 640x200 4c on regular CGA board possible?

Posted on 2023-09-15, 19:11

by

by MobyGamer

in Marvin \ Video

in Marvin \ Video

Jo22 wrote on 2023-09-11, 23:15: I wonder if it's possible to have 640x200 in 4 colours on a regular CGA card. If you'd like to play with that concept without modifying a CGA card, the PCjr and Tandy 1000 systems already have that as a supported mode (in the BIOS, no less), as it was introduced …

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Re: Hearsay 1000 for IBM PC - a missing piece of PC sound history from mid-eighties

Posted on 2023-09-12, 06:31

by

by MobyGamer

in Marvin \ Sound

in Marvin \ Sound

Are we still looking for the original Hearsay software, or has that been archived by now?

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Re: Announcing SOFTHDDI, a TSR for DOS that adds hard drive clicks and lights

Posted on 2022-12-12, 14:52

by

by MobyGamer

in Release Announcements

in Release Announcements

1152 bytes, slightly over 1K. I could get that down through aggressive size optimization, but it would make the source less readable and slightly less flexible, so I'm not going to worry about it unless it hits 2K.

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Re: Announcing SOFTHDDI, a TSR for DOS that adds hard drive clicks and lights

Posted on 2022-12-11, 05:16

by

by MobyGamer

in Release Announcements

in Release Announcements

I stand corrected 😀

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Re: Patch for Windows 95/98/98 SE/Me to run on newest CPUs

Posted on 2022-12-10, 18:55

by

by MobyGamer

in Release Announcements

in Release Announcements

Just wanted to say thanks so much for developing and releasing this; it's a boon to researchers. Appreciated!

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Re: New DOS mouse driver for VirtualBox/VMware/ PS/2 mice

Posted on 2022-12-10, 18:40

by

by MobyGamer

in Release Announcements

in Release Announcements

Great project! I would never have taken on "guest tools for DOS" but I'm happy you are 😀 I'm curious about your TSR for shared folders, where can I read more about that and how it works? Does it use the DOS redirection interfaces?

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Announcing SOFTHDDI, a TSR for DOS that adds hard drive clicks and lights

Posted on 2022-12-10, 18:36

by

by MobyGamer

in Release Announcements

in Release Announcements

I wrote a progam for vintage DOS computing that I thought VOGONS people might be interested in: It's called SOFTHDDI, and it implements in software what the "HDD Clicker" does in hardware. And while I was writing it, I added the ability to show hard drive activity onscreen and on the keyboard LEDs …

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

Posted on 2022-10-02, 04:03

by

by MobyGamer

in Marvin \ Sound

in Marvin \ Sound

I can run modmxt on my PC (4.77 MHz, Sound Blaster Pro) just fine. It should run on yours, and sound great at 10 MHz too. What settings (port, irq, dma) is your soundcard set to? Do you have a BLASTER environment variable set up that matches the settings, and does modmxt show those settings on …

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

Posted on 2022-09-13, 08:51

by

by MobyGamer

in Marvin \ Sound

in Marvin \ Sound

You probably shouldn't do that; undocumented DOS functions aren't consistent. There's a better way that works with all DOS versions, int 21h,AH=29h ("parse filename"). I've attached some sample code. If it doesn't work with DOSBOX, it won't work with at least one compatible or clone system out there …

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

Posted on 2022-09-02, 00:37

by

by MobyGamer

in Marvin \ Sound

in Marvin \ Sound

Do not use Auto-EOI. It has bad side effects (like not being able to use the keyboard properly, or having a hung keyboard even after the PIC is reset and auto-EOI turned off). As for buffers in the code segment, not sure how that would help because you'd need CS: overrides; it might be better to use …

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

Posted on 2022-08-31, 00:03

by

by MobyGamer

in Marvin \ Sound

in Marvin \ Sound

I used to use linear when I didn't have the speaker hooked up to anything, but ever since I hooked it to an amplifier and volume knob, I use log. I agree that 8286 Hz mixing, 16572 Hz output is best, but that might not be possible with 4 channels @ 4.77 MHz. I think I only got modmxt as high as 5KHz …

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

Posted on 2022-08-29, 18:48

by

by MobyGamer

in Marvin \ Sound

in Marvin \ Sound

The 1/2 mixing rate vs. output rate is a good tradeoff to eliminate the PC Speaker carrier noise, for sure. (Some games in the late 80s did that.) For the PWM conversion table, here's how I do it: Values are 1 to N where N is (1193182 / samplerate) -1. The 1 to N-1 range ensures no timer issues (0 …

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

Posted on 2022-07-21, 23:27

by

by MobyGamer

in Marvin \ Sound

in Marvin \ Sound

FreddyV wrote on 2022-07-21, 15:32: I just checked the plane, hostel for the comming demo party, it is quite complicated... No worries, but we can talk about that over email.

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

Posted on 2022-07-21, 03:16

by

by MobyGamer

in Marvin \ Sound

in Marvin \ Sound

FreddyV wrote on 2022-07-04, 06:37: More promotion of the player is welcome anyway, I don't see new videos on it on youtube. I will make a video on it either late 2022 or early 2023, don't worry 😀

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Re: WD90C11 and AT&T Model 6300 video mode

Posted on 2021-12-03, 20:19

by

by MobyGamer

in Marvin \ Video

in Marvin \ Video

I've also got an "Olivetti" labled PVGA1 card (related to WD90C00) with Olivetti BIOS.. Maybe this will be useful later on ? Can you try setting mode 40h via int 10h on that card? I have a PVGA1A card in my 286-based AT&T (Olivetti) system and it works with 640x400x2 mode inits. I disassembled the …

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Re: Art of CGA

Posted on 2021-08-01, 01:51

by

by MobyGamer

in Marvin \ Video

in Marvin \ Video

That's excellent work. What program(s) did you use to create it?

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Re: CVX-2 : covox adapter

Posted on 2020-12-28, 19:28

by

by MobyGamer

in Marvin \ Sound

in Marvin \ Sound

Remember that issue I had where the lack of a pull-up resistor meant the OPL3LPT device didn't work right on some of my systems? Do you think it might be related to this? Also, the PS/2 Model 77 is microchannel; some software might not work correctly on it vs. regular ISA, EISA, VLB, or PCI systems. …

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Re: Possible Solution to Youtube and DOS Aspect Ratio Issues

Posted on 2020-12-20, 17:18

by

by MobyGamer

in Milliways

in Milliways

1600x1200 is both a 5:6 integer resize and also preserves the aspect ratio, so that's correct for 320x200 sources. But why does one of your videos have 1182 and not 1200?

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

Posted on 2020-12-12, 04:58

by

by MobyGamer

in Marvin \ Sound

in Marvin \ Sound

Is the number of buffers tunable? (for lower latency, and I think you know where I'm going with this) I agree that there are rapidly diminishing returns when your channels exceed the number of bits in your PCM output.

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

Posted on 2020-12-10, 15:30

by

by MobyGamer

in Marvin \ Sound

in Marvin \ Sound

I very much look forward to your explanation, in your own words. Also, a description of how you deal with high mixing demand (ie. what happens as farther buffers get exhausted: Raising the volume threshold of a channel to be heard, stopping mixing into the current buffer if it needs to be played …

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