Re: Maxing out Win95 conventional memory

Posted on 2025-03-22, 18:52

by

by tauro

in Marvin \ Software

in Marvin \ Software

Harry Potter wrote on 2025-03-19, 10:55: Try EMSMagic! https://www.emsmagic.com/. EMSMagic appears to be geared towards running programs that require EMS on NTVDM. I'm talking about conventional memory here, not EMS. On DOS 7.1 EMSMagic takes about 70k of conventional memory...

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Re: Any love for Cyrix MediaGX ?

Posted on 2025-03-19, 10:32

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

ViTi95 wrote on 2025-03-19, 10:18: Lotus 3 is probably slow because vsync. It requires the screen to update at 70hz, on most laptops the screen updates at 60hz (85% real speed). It's not that it works at 85% speed, it's crawling speed. Very very, very slow.

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Re: Any love for Cyrix MediaGX ?

Posted on 2025-03-19, 09:29

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Basically they use the CPU for certain operations, which slow everything down. There isn't much more information about how it really works. Also seems not everything is 100% implemented. That explains why Doom performs relatively worse than Quake, which I think uses the FPU more than the ALU. For …

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Re: Any love for Cyrix MediaGX ?

Posted on 2025-03-18, 18:06

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The Presario was designed to be non-upgradable. A few things I never bothered looking at, is 1. Are the 16 bit isa lines still accessible off the chipset somewhere 2. Is the pci bus still there on a chip somewhere (signalling using bodge wires would likely be terrible) 3. Was the 80mb ram limit …

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Re: Any love for Cyrix MediaGX ?

Posted on 2025-03-18, 18:02

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Example 3 Frame 1 Filename frameD1.png File size 615.77 KiB Views 151 views File license CC-BY-4.0 Frame 2 Filename frameD2.png File size 606.57 KiB Views 151 views File license CC-BY-4.0 Frame 3 Filename frameD3.png File size 579.53 KiB Views 151 views File license CC-BY-4.0

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Re: Any love for Cyrix MediaGX ?

Posted on 2025-03-18, 17:58

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Example 2 This time it goes one way and then the other way, before it returns. Frame 1 Filename frameA1.png File size 403.32 KiB Views 152 views File license CC-BY-4.0 Frame 2 Filename frameA2.png File size 390.56 KiB Views 152 views File license CC-BY-4.0 Frame 3 Filename frameA3.png File size 390 …

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Re: Any love for Cyrix MediaGX ?

Posted on 2025-03-18, 17:53

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Example 1 Frame 1 Filename frame1.png File size 418.51 KiB Views 154 views File license CC-BY-4.0 Frame 2 Filename frame2.png File size 398.36 KiB Views 154 views File license CC-BY-4.0 Frame 3 Filename frame3.png File size 390.37 KiB Views 154 views File license CC-BY-4.0

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Re: Any love for Cyrix MediaGX ?

Posted on 2025-03-18, 17:49

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My guess is that they focused on performance for VESA modes, as they are faster and easier to work with. All other modes were merely emulated for backward compatibility. I see. It shows a lack of seriousness and commitment. But probably the budget was low. I can't understand how you can emulate …

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Re: Any love for Cyrix MediaGX ?

Posted on 2025-03-18, 17:31

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

How is the sound blaster compatibility on the MediaGX? How does it compare with the Advanced Logic ALS100 Plus? DIAGNOSE.EXE Version 4.04 detects it as DSP version: 4.12 and everything is detected correctly and it's working fine. All the programs and games I tried worked well. On the Presario 2200 …

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Re: Using AI to find information on old hardware - a case study

Posted on 2025-03-18, 16:28

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Never blindly trust AI. It's even less credible than Wikipedia. But if you can "tame it", you can profit from it: solving math problems, finding bugs, generating images, and other things like that. For web search related things Perplexity is one of the best. I'm worried about the ability to think …

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Re: CGA4VGA - correcting/altering CGA graphic modes colors on VGA

Posted on 2025-03-18, 15:57

by

by tauro

in Marvin \ Video

in Marvin \ Video

Finalizing the thing i wanted to do about three decades ago :) As you might noticed, CGA colors in graphics 320x200x4 modes are not always correct. Sometimes Cyan/Magenta/White is displayed instead of Green/Red/Yellow, Mode 5, that usually displays Cyan/Red/White, ignored completely. As i got my …

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Maxing out Win95 conventional memory

Posted on 2025-03-18, 07:07

by

by tauro

in Marvin \ Software

in Marvin \ Software

The whole point of this is research is to free up as much conventional memory as possible on machines that are not compatible with other memory managers, such as UMBPCI, while remaining in real mode. I'm using HIMEMX since it appears to be 100% compatible with HIMEM.SYS (is it?) and it frees as much …

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Re: [Help] Did I lose my K6-2+? :(

Posted on 2025-03-12, 22:05

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

C3 and C5 are status/error codes during BIOS decompression (as you might be aware: BIOSes at that time contain a boot block, and the remaining part of the BIOS is compressed like an LHA archive and decompressed into shadow RAM by the boot block, or a boot block "plugic" called a "decompression BIOS …

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Re: FX5500 PCI Running INCREDIBLY slow on hardware

Posted on 2025-03-12, 06:16

by

by tauro

in Windows

in Windows

The FX 5500 has programmable shaders, which require greater CPU overhead than older cards with a fixed-function pipeline, like the GeForce4 MX series. So, the best video card for a PCI-only Socket 7 system is likely the GeForce4 MX 440 or MX 4000. Keep in mind the bus width.

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Re: Weird "Solar Power" AT PSU

Posted on 2025-03-08, 21:50

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The label it's stuck on with tape, and behind it there's another label. I'd say someone must've fitted an AT pcb in a ATX enclosure. You have a very good eye! I had noticed the tape but not the label behind it. There's in fact an ATX label behind it. hidden.label.jpg The "Solar Power" label has a …

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Re: 3dfx Voodoo 3 2000 PCI SGR rev. C3 rescued - running but missing 2 tiny smd capacitors and some video corruption

Posted on 2025-03-08, 21:22

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If nobody answers, I'd remove C61, and maybe others nearby, measure them, and get similar values for C64 and C69. Did you manage to replace the RAM chips? Hopefully that solves it. The fact that it's missing the heat sink makes me think it was removed (by a human or by the forces of nature...) in a …

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Re: Quake II freezing with K6-2+ 570 @ 600

Posted on 2025-03-08, 21:20

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Nice

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Re: Quake II freezing with K6-2+ 570 @ 600

Posted on 2025-03-08, 20:43

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Glad you solved it! What resolution are you using for 99.6 fps?

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Re: Weird "Solar Power" AT PSU

Posted on 2025-03-08, 20:36

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Looks to me like that diagram is indicating you should switch the AC in. The diagram shows a typical DPST switch. The one all the other AT PSUs I've seen have. They are usually fixed to the front of the case. The switch on the back is a simple SPST switch. One cable is permanently wired to the PSU …

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Weird "Solar Power" AT PSU

Posted on 2025-03-08, 18:48

by

by tauro

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I got this PIII M748LMRT system. The seller warned about not using the PSU. The strange thing about it is that it lacks the AT power switch! And there are no loose cables anywhere. It has a switch near the power plug, but that's it. The connector is AT, not ATX so... are you supposed to reach behind …

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