Re: Onboard video and RAM = Garbage?

Posted on 2018-11-09, 08:31

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So LGA775 is going to have a dual channel (interleaved) memory setup. This IS why you are getting corruption when both sticks are installed in a specific physical arrangement. The bad part of the one stick of RAM IS being accessed BECAUSE of the dual channel operation. The layout of the RAM …

---

Re: Onboard video and RAM = Garbage?

Posted on 2018-11-09, 02:24

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Koltoroc wrote: the framebuffer is independent from dos/legacy memory. In DOS It is accessed by a 64 or 128k window in the upper memory area where memory pages from the actual framebuffer will be copied to and from. Ok, fone but on post you’re still using legscy methods to display the text on the …

---

Re: Onboard video and RAM = Garbage?

Posted on 2018-11-09, 02:02

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

modern shared memory video chips have no fixed location or sizefor the video memory. Size is either reserved in bios or dynamically changed depending on what is needed. Socket 775 are new enough for that already to be a thing. So the memory used and therefore the locations in the memory map will …

---

Re: Onboard video and RAM = Garbage?

Posted on 2018-11-09, 01:33

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Also when you switch modules the layout will be the same, but the actual physical locations will be different. Wait what? What do you mean with physical locations? Chips are all made the same, from low to high addresses and accesed the same way. If you have one stick and the cpu needs to access the …

---

Re: Onboard video and RAM = Garbage?

Posted on 2018-11-09, 01:29

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

why? The memory layout will be different when you use 2 sticks vs one. Also when you switch modules the layout will be the same, but the actual physical locations will be different. In this particular case it is indicative, that a certain region on 1 specific module has issues and that location …

---

Re: Onboard video and RAM = Garbage?

Posted on 2018-11-09, 00:49

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, that’s what I thought, but it boots up fine with either stick by itself... That is not an indicator for ram being fine or not. to be certain you have to run a test programm like memtest86. I know, and I know the proper test is with memtest, and I will do that, but it doesn’t make sense that if …

---

Re: Onboard video and RAM = Garbage?

Posted on 2018-11-09, 00:22

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

skitters wrote: I'd run memtest on the RAM while using the PCI card for video. It sounds to me like one of the RAM sticks might have a bad spot, and that bad spot was what the onboard video was using. Yes, that’s what I thought, but it boots up fine with either stick by itself...

---

Onboard video and RAM = Garbage?

Posted on 2018-11-08, 23:15

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi folks, was testing out a P4 "system" I was given today, consisting in an Asrock Motherboard, a socket 775 3Ghz P4, and 512MB of RAM. While I will not be using onboard video later on, I did just hook that up to see if it powered on, booted up, etc. I noticed that after powering up, I saw all …

---

Re: Dual Video on PIII - Worth it?

Posted on 2018-11-06, 03:55

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Intel486dx33 wrote: If you are looking for a graphics card that supports dual displays the Matrox G400 or G450 is a good AGP card. Thanks,but not looking for that. The dual part was meant for d3d and glide game support

---

Re: Dual Video on PIII - Worth it?

Posted on 2018-11-06, 00:27

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Koltoroc wrote: I'd say the other ones look fine. The first one looks familiar, I have a K6 200 with the same video card loadout. Same manufacturer even. Thanks!

---

Re: Dual Video on PIII - Worth it?

Posted on 2018-11-06, 00:00

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

1) no, not really. IIRC the Voodoo 3 is about as fast as the tnt 2 and the only advantage of the TNT 2 is 32 bit color depth and I believe somewhat larger texture sizes.. Which is a nice to have but not critical 2) the PCI version is indeed more expensive, because it is more sought after. The …

---

Dual Video on PIII - Worth it?

Posted on 2018-11-05, 22:18

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi All, I am building a few pentium machines, and going *sort of* by rule of thumb / period accurate, I was looking at what video cards to install in each one, with the additional thought that I wanted to have the best of both world in terms of 3D, meaning mixing 3DFX with Nvidia... So when I look …

---

Re: Help configuring 486 board

Posted on 2018-11-03, 18:42

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I do fear naybe the dx4 was dead anyway because it doesn’t even get warm... It's also possible that the CPU itself is fine. It may be the motherboard's voltage regulator that's dead - assuming you set the voltage jumpers to 3.3V for the DX4. In 5V setting the board won't use the regulator, it'll …

---

Re: Help configuring 486 board

Posted on 2018-11-03, 18:09

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ok, switched jumpers back, re-installed the DX2, boots up fine, and here are the pics: Filename 42B0EA1C-907D-4833-A22D-05CC242E1345.jpeg File size 618.2 KiB Views 447 views Filename 8F77F78E-0203-4971-B49A-781094DC5DA7.jpeg File size 1.08 MiB Views 447 views Filename 3F06DD3D-B32C-4DC0-9DAD- …

---

Re: Help configuring 486 board

Posted on 2018-11-03, 16:17

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would be careful in inserting a 486DX4 100 MHz CPU, since this is a 3.3V CPU and most 486DX2 66 MHz CPU's were still 5V. Your motherboard does appear to have jumper settings silkscreened on the PCB to change the voltage (refer just below the CPU on the first picture your posted). If you didn't …

---

Help configuring 486 board

Posted on 2018-11-03, 15:46

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi folks, I’m setting up a few machines, and I have one I cannot get to boot up. The motherboard with an ISA video card and one 4MB SIMM boots up fine with an Intel 486DX2/66 cpu, however, when I change the jumpers and insert an Intel 486DX4/100 it does not. No sound, nothing... This seems to be one …

---

Re: 486 board identification and cache

Posted on 2018-10-27, 21:00

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The Serpent Rider wrote: Soldered cache = fake. 1.4 is not compatible with late AMD CPUs, at least on paper. M912 was always UMC. That’s fine, as I wrote on my post, this will be used with an Intel DX2-66, so I really don’t care about late AMD CPUs... (I have a 3.4 for that)

---

486 board identification and cache

Posted on 2018-10-27, 19:38

by

by walterg74

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi all, I got this board which I will be turning into a “classic” Intel DX2-66 system. Trying to identify it, From what I see it’s an m912 v1.4 (the only difference is that the picture at elhvb shows the chips at “pc chips” and mine says UMC (and the specs do say it is UMC) Does this look right to …

---

Re: High refresh rates in DOS ?

Posted on 2018-10-26, 19:28

by

by walterg74

in Marvin \ Video

in Marvin \ Video

Most LCDs can do > 60hz at lower-than-native resolution. My 1080p does exactly 70hz in an aspect-corrected 1024x768, which is perfect for gaming in DOSBox. Yeah, the image isn't perfectly crisp if you get close enough, however the benefit of playing judder-free 70 fps in Wold3D and Pinball Dreams …

---

High refresh rates in DOS ?

Posted on 2018-10-26, 15:05

by

by walterg74

in Marvin \ Video

in Marvin \ Video

Hi folks, was just thinking about this, and cannot seem to find any related threads that DON´T talk about emulation / dosbox.. Suppose you have a monitor capable of higher refresh rates, and the card can too. I know it's easy in windows, just go to the GUI, set the resolution and refresh and your …

---