Re: What would be a good high accuracy old PC emulator?
Posted on 2022-01-11, 12:51
PCem is amazing, yes!
Re: The Ultimate Retro project (formerly known as UH19) - a stason.org/TH99 alternative
Posted on 2022-01-03, 16:41
While using this amazing page, i did feel one thing missing. In addition to supported amount of cache on boards, it could be nice, if it also marks, in which mode this cache can work: WriteThrough and WriteBack. Quick examples of 2 boards, where chipset supports WriteBack in addition to WriteThrough …
Re: What retro activity did you get up to today?
Posted on 2022-01-03, 10:17
I was investigating this board that i have (MS-3131): https://www.ultimateretro.net/en/motherboards/1389 Based on chipset's datasheet, it should support writeback for its cache. But i never got it to work. I used AMISETUP and CTCHIP34 to look into chipset's registers, but couldn't find much about …
Re: L2 cache on 486 mainboard
Posted on 2021-12-30, 20:07
Just a quick remark for you, as you want to make the board running in top speed: I've not seen any SIS471 board+bios combination, where L2 cache properly works in write-back mode. For that, you can edit the bios or download modified bios by someone else, which changes few registers to make L2 cache …
Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!
Posted on 2021-12-21, 16:39
As BitWrangler said: BitWrangler wrote on 2021-12-21, 04:08: 286 protected mode has issues. Why weren't they fixed? They were, intel called the new revision the 386. And if you want to be more precise, it's 386SX on a 286 chipset based motherboard. 😉 Go ahead. 😀
Re: Bought these (retro) hardware today
Posted on 2021-12-20, 15:35
Few days ago met another local retro-pc (and some consoles) person, who gave me a Trio32 VLB videocard, which was a good improvement over my CL-GD5429 based VLB card on my 486 pc. (Quake benchmark went from 16.1fps to 16.5) Even though he just gave it to me, i promised that this is not the end of …
Re: What retro activity did you get up to today?
Posted on 2021-12-15, 22:14
Found out this thing: https://archive.org/details/promisevg4controller And it's quite a boost! 😮 I always had a feeling that VLB IDE controller (without any fancy cache on board) is just a "feel good" thing. But now it does DMA! 😮 I'm maxing out my CF card on 486! 😮
Re: Bought these (retro) hardware today
Posted on 2021-12-15, 09:00
All real computers have mechanical hard drives. More like "all real vintage PCs". I use CFs mostly for ease of moving files between vintage hardware and modern PC. But I still usually add mechanical HDD because of all the sweet noises it makes :D Same here, i use mainly CF cards - my heart just …
Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!
Posted on 2021-12-08, 14:00
leileilol wrote on 2021-12-08, 11:06: could we not Please, as leileilol has posted, it's been settled. Though, i would love to identify Doom as 2.666D 😁 This is FastDoom project's thread. That project is amazing! But what are we discussing here?
Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!
Posted on 2021-12-06, 19:03
trixster wrote on 2021-12-06, 18:32: So, is there an ISA card out there that might provide even more fps than the Mach64 and the ET4000AX?! I have CL-GD5434 based ISA VGA card on my 386DX-40. Do you want me to test something out with it?
Re: Any performance difference between these 386 chipsets?
Posted on 2021-12-02, 11:50
AFAIK, AMD is direct clone in terms of performance - no optimizations, no on-die cache to talk about, nothing. Only "optimization" is that many AMD cpu's were capable of 40MHz. But that's a different topic.
Re: Any performance difference between these 386 chipsets?
Posted on 2021-12-02, 11:19
Some motherboards can do write-back cache with extra cache chip. (Like M321) That can give a bit of a boost compared to normal write-through cache. ;) The motherboard with ALI chipset has Write buffer/back cache option in bios. Is that the thing you are talking about? Of course I have no way of …
Re: Any performance difference between these 386 chipsets?
Posted on 2021-12-02, 10:33
Some motherboards can do write-back cache with extra cache chip. (Like M321) That can give a bit of a boost compared to normal write-through cache. 😉
Re: Opti 82C391: Is there a DOS configuration utility for memory timings?
Posted on 2021-11-29, 08:37
NB! Don't trust CTCHIP, when it says something is enabled or disabled - it's buggy as hell, even showing different values depending on your display mode (the "M" key). Read the bits themselves and refer to documentation. Don't trust CTCHIP's explanations/descriptions.
Re: Opti 82C391: Is there a DOS configuration utility for memory timings?
Posted on 2021-11-27, 17:15
https://www.vogons.org/viewtopic.php?f=46&t=66506 I had quite a trouble to get to know what chipset this board has, but found it out - it's the same you care about. As you can read from the thread, there's MR BIOS available for your chipset. It has some memory timing settings available too. ;) …
Re: What retro activity did you get up to today?
Posted on 2021-11-27, 11:28
Kinda sad to sell it - it's just beautiful machine. But by now, too old and slow for stuff i need to do... Have you considered turning it into a highly overpowered WinXP retro rig? From what I can see, that motherboard should still have XP drivers. And you can always dual boot with Win7 for some of …
Re: What retro activity did you get up to today?
Posted on 2021-11-27, 10:42
For a moment, i consider 2013 as retro. Set up my old workstation PC for sale. Selling it in local Estonian forum, but who want's to see more pictures and specs, you can find them out here: https://foorum.hinnavaatlus.ee/viewtopic.php?t=812042&highlight= Kinda sad to sell it - it's just beautiful …
Re: The Ultimate 486 Benchmark Comparison
Posted on 2021-11-23, 08:24
Few benchmarks that i can add from myself: A strictly non-PCI 486. CPU: AMD 5x86-75 RAM: HP 2x32MB 60ns 72pin DIMM GPU: Cirrus Logic CL-GD5429-86QC-B VLB 2MB Motherboard: Soyo 025P2 / QDI V4S471/G (benchmarked both) L2 Cache: Soyo - 256kB (15ns); QDI - 1024kB (mix of 10ns and 12ns - probably fake …
Re: What retro activity did you get up to today?
Posted on 2021-11-22, 18:07
Recently replaced my Soyo 025P2 motherboard with the QDI V4S471/G, as that one can have 1024kB of L2 cache. Also used 9x1024kb chips, 10 and 12ns, that i got from aliexpress. (probably timings are fake, but don't care that much) As a result, i made some benchmarks, too: tmp.png QDI @ 3x50 seems to …
Re: Help to identify: MULTIPRO VII-386DXV (UR INFINITY)
Posted on 2021-11-18, 13:01
The saga continues, i've found 2 pins of io controller to be shorted and so the floppy drive doesn't properly seek. Couldn't get rid of the short with soldering iron, so it must be deep under the chip. Maybe during the weekend i have the time to completely remove and re-attach the chip once again... …
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