Re: 486 cache/ram speed issue with write-back

Posted on 2019-09-26, 21:14

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OMG, thank you guys! The board is Soyo SY-25P or 025P2, both are right. (No separate socket for dirty tag cache) I had the same problem as described here - WT cache shows over 100MB/s memory bandwidth with speedsys, WB shows a bit over 30MB/s. So first, the only ctcm 1.5 version worked correctly. …

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Re: 486 cache/ram speed issue with write-back

Posted on 2019-09-26, 18:02

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Its an issue with missing Dirty tag, which is needed for successfull WB strategy. You can check the availibility with the ctcm tool. If you have no dirty tag, then you can fix it with a BIOS Update or, in case of SiS471, with Hardware Hack. The 471 in general supports dirty tag. CTCM? Creative …

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Re: 486 cache/ram speed issue with write-back

Posted on 2019-09-26, 15:07

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just writing here so it would be easier for me to monitor the topic. I too have a motherboard (Soyo 25P2) where Write-Back L2 shows lower memory bandwidth than Write-Through. (I have Am486DX4-100 with write-through L1)

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Re: NEW iPhones

Posted on 2019-09-25, 09:41

by

by GigAHerZ

in Milliways

in Milliways

Last elegant phone from Apple was iPhone 5s.

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Re: Restoring an AMD 386 system, need some advice

Posted on 2019-09-25, 09:38

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by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Give us a hi-res photo of that io card, we'll see, what we get out of it. 😉

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Re: Restoring an AMD 386 system, need some advice

Posted on 2019-09-24, 07:10

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Just connect center and one of the side pins of turbo switch to motherboard. The switch either connects left and center or right and center. Depending on which way you insert this 3pin wire to 2pin headers, the turbo has to be pushed in or out to be in turbo state. Just try and set it as you like. …

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Re: Quake without FPU

Posted on 2019-09-23, 19:27

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by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@Tronix, while i definitely went through the readme, i don't remember any more if i did play around with the q87x. I'll give it a second try. Thanks!

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Re: Quake without FPU

Posted on 2019-09-23, 19:11

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

georgel wrote: GigAHerZ wrote: Would be interesting to try some working emulator though. ftp://ftp.elf.stuba.sk/pub/pc/utilmisc/q87_413.zip Thanks! Though, i've already tried that and couldn't get quake running with it... 🙁

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Re: mTCP updates coming soon: Send me your bug reports

Posted on 2019-09-23, 14:18

by

by GigAHerZ

in Milliways

in Milliways

I might have mixed up the BBS. Other one, that had many files was digisoft.club. One of them supported only the Zmodem.

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Re: Quake without FPU

Posted on 2019-09-23, 13:19

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Some time ago, i tried out many different 387 emulators, but couldn't find any, that would work. I think i also used quake to try running it. With real 387 co-processor, the quake does run... or walk on my 386. Would be interesting to try some working emulator though.

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Re: mTCP updates coming soon: Send me your bug reports

Posted on 2019-09-23, 05:19

by

by GigAHerZ

in Milliways

in Milliways

@mbbrutman, for one example, digitaldistortionbbs.com. I believe it's a original BBS converted to use telnet today. It has a huge library of files, yet it doesn't support X/Y modem, only Zmodem... Is there maybe any possibility to create those modem parts as separate applications and then somehow …

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Re: What retro activity did you get up to today?

Posted on 2019-09-18, 20:30

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by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got some SOJ packaged dram chips and upgraded my VLB S3 805-P from 1MB to 2MB. Same card as here: http://www.vgamuseum.info/images/vlask/s3/805-pf.jpg

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Re: AMD 5x86 P75 - Win98 or Win98?

Posted on 2019-09-16, 05:23

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by GigAHerZ

in Marvin \ Software

in Marvin \ Software

@AlessandroB, there is - you need to enable SMB1 on Win10. By default SMB1 is turned off, as it's old and full of bugs and security flaws.

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Re: AMD 5x86 P75 - Win98 or Win98?

Posted on 2019-09-15, 19:28

by

by GigAHerZ

in Marvin \ Software

in Marvin \ Software

AlessandroB wrote: GigAHerZ wrote: You need to enable SMB1 support on Win10, then you can. Also between w3.11 and win10 There's nothing to enable in w3.11, as it only knows the first version, nothing else...

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Re: Dos 6 conventional memory tricks

Posted on 2019-09-14, 16:31

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by GigAHerZ

in Marvin \ Software

in Marvin \ Software

@Nemo1985, you can use RDOSUMB, URAM or something similar instead of UMBPCI. Those are written in the nineties and support way older machines like 386 and 486.

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Re: AMD 5x86 P75 - Win98 or Win98?

Posted on 2019-09-14, 09:50

by

by GigAHerZ

in Marvin \ Software

in Marvin \ Software

You need to enable SMB1 support on Win10, then you can.

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Re: Is 486 DX the ultimate DOS machine?

Posted on 2019-09-12, 07:36

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by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I want to have fastest mainstream 386, fastest mainstream 486 and fastest mainstream pentium(mmx) and i pretty much do and feel good. :) Am386DX-40 with 256kB of cache (writeback enabled also) Am486DX4-100 with 256kB of cache Pentium MMX @266MHz with 512kB of cache 386 is for DOS, 486 is for DOS+ …

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Re: Good 386 motherboard with FPU socket

Posted on 2019-09-11, 17:33

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by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

While i don't have much to compare with, i do like the M321 motherboard: https://stason.org/TULARC/pc/motherboards/I/I … -321-VER-2.html It has cache with writeback capability. This is a feature many boards don't have.

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Re: Bought these (retro) hardware today

Posted on 2019-09-11, 10:35

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I just found that there are ML2032 coin cell batteries, that are physcally identical to CR2032, but are rechargable. Quick search to aliexpress lead to offers at around 3$ a piece. 😉 EDIT: And LIR2032, which is 3.6V rechargable in the physical shape of CR2032!

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Re: Bought these (retro) hardware today

Posted on 2019-09-11, 08:26

by

by GigAHerZ

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The empty socket is for 387 co-processor. Not necessary, but optional. For ram... Well, in the end, i have just tried out and then added sticker about the size on it. For me it has been quicker than to go through chips datasets and count together, what's the size... First thing you want to do is to …

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