Re: 486DLC cache coherency blues and headaches

Posted on 2021-04-25, 01:14

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well, what do you know. I pulled off some 15ns cache from my 5x86 system and replaced the one on the 386 board. It seems to run mostly fine now, able to complete benchmarks such as Quake which it couldn't before (or could but with graphical errors). I've had an odd hiccup once , but I'd say that's …

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Re: PowerVR Fun Thread

Posted on 2021-04-24, 15:46

by

by Garrett W

in Marvin \ Video

in Marvin \ Video

Considering 3Dfx prices in the last few couple of years, as well as PCX2 and M3D cards that I've seen come and go for 100$+, I'd say that's actually a pretty good price for this card and the concept is great as well, really digging it. Love these community projects, we have so many choices these …

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Re: age of empires 2 bad performance on pentium iii

Posted on 2021-04-22, 21:25

by

by Garrett W

in Marvin \ Software

in Marvin \ Software

Is the SBLive! running using WDM or VXD drivers?

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Re: 486DLC cache coherency blues and headaches

Posted on 2021-04-21, 11:16

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Appreciate the suggestion, but I think this would put me on a wild goose chase. I've already tried the slowest possible wait states (3WS I believe) and the crashes and divide by zero errors kept appearing with the same frequency. On the 386, these issues never materialized and I had that running …

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Re: 486DLC cache coherency blues and headaches

Posted on 2021-04-21, 08:42

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for the help, but I'm afraid I don't quite understand what you mean by the above. Do you think it would be a good idea to replace the SRAM chips, even though they seemed to run 100% fine when using the Intel 386 at 40MHz? What do you mean right order? How would I be able to figure that out?

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Re: 486DLC cache coherency blues and headaches

Posted on 2021-04-20, 10:05

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for the tips, I'll see what I can apply to my case and hopefully make heads or tails of this situation.

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Re: 486DLC cache coherency blues and headaches

Posted on 2021-04-20, 07:47

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well, here's where it gets weird. As long as I use the 486DLC, the L2 does not work fine, even if used solo with the L1 disabled. This was not the case with my 386DX-33 (which I ran at 40), the system was stable and these sorts of issues did not appear. I have indeed tried to increase the wait …

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Re: 486DLC cache coherency blues and headaches

Posted on 2021-04-19, 23:45

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Bumping this in the hope that more knowledgeable people missed it :p

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Re: SPGA and PPGA compatibility

Posted on 2021-04-18, 20:37

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Do you have the latest BIOS? If not, try the latest one from here. If that fails, check the pins on the CPU side, are they all intact?

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2021-04-14, 09:31

by

by Garrett W

in Release Announcements

in Release Announcements

This kicks ass. Thank you so much!

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Re: Problem with using SDRAM in my Pentium MMX machine

Posted on 2021-04-13, 08:31

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What motherboard do you have? If it's 430VX or TX based, then you might need older DIMMs, usually 32MB PC66 do the trick.

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Re: recommend a CPU upgrade for my 486 (and RAM)

Posted on 2021-04-12, 18:11

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As an owner of a Cyrix 5x86... I'd recommend the AMD 5x86 133. The Cyrix part can be faster than the AMD part, but it requires some luck to overclock the 100MHz part to 120MHz, compatible boards (which you have) and perhaps more importantly, some degree of tweaking to enable features and registers …

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Re: S3 ViRGE deep dive

Posted on 2021-04-11, 17:17

by

by Garrett W

in Marvin \ Video

in Marvin \ Video

Excellent write-up, very fun to read through!

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Re: Windows 95 lag spikes using sd to ide adapter

Posted on 2021-04-11, 17:07

by

by Garrett W

in Windows

in Windows

Are you sure this is an issue with the SD card or adapter? Is DMA enabled for the controller in the device manager? Have you given "Cacheman" a try? I find version 4.1 to work pretty well for Win9x.

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Re: Ultima IX issue - Lag on loading books

Posted on 2021-04-10, 09:28

by

by Garrett W

in Windows

in Windows

I've had this exact issue on countless systems when trying to run Ultima IX. I'm afraid there ain't much of a solution, it seems to be tied to the Direct3D renderer. Perhaps you could try a Glide Wrapper such as the original dgVoodoo, I remember the problem going away when using a 3dfx card.

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Re: 486DLC cache coherency blues and headaches

Posted on 2021-04-07, 22:47

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well, that took a while. Sorry about the delay, didn't really have the willpower to work on this for a few days, but today I decided give it another go. I went ahead and tried something different, L1 enabled, but L2 disabled and guess what, system seems stable, I couldn't get it to hang! I pulled …

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Re: 486DLC cache coherency blues and headaches

Posted on 2021-03-30, 08:22

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Concerning Windows 3.1x and WfW 3.11 usage, I wonder if Glenn Slayden's " TI486 VDMAD " driver could potentially be helpful? TI486 VDMAD - Version of the virtual DMA device (VxD) for Windows 3.1 or Windows for Workgroups 3.11 which, in order to preserve external cache coherency, controls the 8K on- …

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Re: 486DLC cache coherency blues and headaches

Posted on 2021-03-29, 18:50

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Interesting. Any thoughts as to what could be going on? I'm fairly certain all issues and freezes disappear as soon as I disable both caches or perhaps I haven't been able to make it hang just yet. The exact same issues also manifest when L1 is off and L2 is on. I use DOS Navigator as a Norton …

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Re: 486DLC cache coherency blues and headaches

Posted on 2021-03-29, 10:31

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Messed around with it for a few hours and while I can get DOS to be mostly stable, Windows 3.11 is a lot more volatile. I tried the FLUSH switch, going to take a look at the BARB one next. What an annoying thing 🙁

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Re: 486DLC cache coherency blues and headaches

Posted on 2021-03-27, 17:23

by

by Garrett W

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, thanks for the in-depth post. Unfortunately, I tried what feipoa suggested as a general rule of thumb in that thread and it didn't really help any. I was perhaps looking for some more deliberate/targeted tips and suggestions, maybe from someone that has experience using said chip on this chipset …

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