Re: Intel Over Drive Questions.
Posted on Yesterday, 13:49
Yes. Those have a fixed multiplier so it likely runs at 166 (f you configure your board to 66 MHz bus) irrespectively what the BIOS says.
Re: Bought these (retro) hardware today
Posted on Yesterday, 13:22
Two pickups Sound Blaster CT1920 WaveTable upgrade. Never had one of those so only now I realised it doesn't have any audio jack, just a proprietary header. Need to find out how to connect it. https://dependency-injection.com/wp-content/uploads/2021/02/DSC_9299-scaled.jpeg Also Stealth32 VLB without …
Re: Bought these (retro) hardware today
Posted on 2021-02-24, 15:48
The Stealth64 VLB is a great find! Congrats!
Re: Diamond Stealth se - ram upgrade won't work?
Posted on 2021-02-24, 12:20
The RP1 seems to be a pull-up resistor array on memory address bus outputs. I couldn't find a SE with RP1 installed. Two of my Stealth SE PCI cards also doesn't have this RP1 installed and they work fine with 2MB. My Stealth 64 VLB has them but PCI versions don't. I guess it is optional. I'd try a …
Re: Pentium on a 386 motherboard ( sort of)
Posted on 2021-02-22, 18:57
The manual says either single 32x8k or two 8x8k when using 256k. But will try to use two chips. Write-back cache L2 is enabled (confirmed). The fastest timing I could use is 3-2-2-2. Surprisingly, disabling L2 cache delivers almost double memory throughput which is likely better for application …
Re: Pentium on a 386 motherboard ( sort of)
Posted on 2021-02-22, 09:28
pshipkov wrote on 2021-02-21, 16:50: _ Thanks. Your AMI BIOS works fine. Haven't noticed any stability/performance difference compared to Mr. BIOS but it is good to have the version that is original for the motherboard.
Re: Pentium on a 386 motherboard ( sort of)
Posted on 2021-02-21, 10:44
Performance @ 83 MHz has been rather disappointing so far. The CPU performance is amazing, but L2/mem remains still @ mediocre 386 levels which is holding back the performance. Hope it can be tuned slightly higher. So overall it is a hair better than a 486DX2-66 on average 486 board. Getting about …
Re: Pentium on a 386 motherboard ( sort of)
Posted on 2021-02-20, 22:09
Next step: insert another PGA237 socket between the PODP and the PGA169, connect all appropriate pins to VCC and GND, set bus to 33MHz, enjoy! :) I 've been thinking about this. However, it would probably only make sense with external Molex adaptor as the point of these extra pins is to protect the …
Re: Pentium on a 386 motherboard ( sort of)
Posted on 2021-02-20, 21:54
Did your board originally come with an AMI BIOS? Could you dump the MR BIOS? Frankly, I am not sure which BIOS is native for this motherboard. It is quite beaten-up board. It came to me with Award BIOS which I only had problems with (HIMEM.SYS failing, L2 cache not working). It was in EPROM with " …
Re: Pentium on a 386 motherboard ( sort of)
Posted on 2021-02-20, 20:02
kolderman wrote on 2021-02-20, 20:00: Cool. But what on earth is that AT2ATX device? Has it got a live display? That's really cool. Where did you get it from? Yes. ATX2AT Smart Converter - Live on Kickstarter!
Pentium on a 386 motherboard ( sort of)
Posted on 2021-02-20, 18:59
I was wondering what would be the perfect upgrade for my 386 system. It has 386DX-40 soldered-in, an unpopulated 386 PGA socket and a socket for either 387 FPU or 486 PGA or (might take a Weitek as well - not sure) and even might come with a soldered-in 486SX PQFP. A plenty of options... But how …
Re: Bought these (retro) hardware today
Posted on 2021-02-19, 09:44
brownk wrote on 2021-02-19, 06:59: GRAVIS-ACE.jpg Got this delivered on my desk. I've been looking for V1.1 for a long long while and finally here it is. Great. Compared to 1.0, does it have anything extra apart from reversed stereo?
Re: Original Hardware: PCI clock measuring device.
Posted on 2021-02-18, 18:53
Love it. One for me please.
Re: 486 CPU upgrade
Posted on 2021-02-16, 17:07
The socket doesn't matter. The extra ODP pin (D4) doesn't matter either. If you have a ODP version, you can clip the pin and it would work just as well in normal socket as it has no electrical function. It just prevents non-technical people from installing it upside down which apparently happened a …
Re: The World's Fastest 486
Posted on 2021-02-16, 12:31
Crazy that these numbers are actually faster than a regular P100. Unless using Triton chipset with PB cache (which can push it to 2-3 fps higher).
Re: Abit AB-PB4 twin paradox
Posted on 2021-02-15, 15:09
Does anyone have an idea what the root cause of the difference could be? Should I do a chipset register dump? If so, how? You can easily dump/modify chipset registers with debug.exe from ms-dos. Just in case BIOS is buggy and don't set something up. First unlock them: -o 22 03 -o 23 c5 then read …
Re: Bought these (retro) hardware today
Posted on 2021-02-12, 15:57
99p is an adequate price for this 😀 Some people are converting these to benches or furniture.
Re: Bought these (retro) hardware today
Posted on 2021-02-11, 20:10
debs3759 wrote on 2021-02-11, 18:42: Any idea which S3 chip is under the Orchid sticker on the Fahrenheit 64 VLB? I'd like to add it to gpuzoo.com if you know? Either S3 864 or 868. Not quite sure.
Re: ATX to AT adaptor -5V
Posted on 2021-02-11, 20:07
No only a relatively small number of cards is using -5V. There is a nice list in this thread - Re: ISA Cards & Devices Requiring -5V
Re: Bought these (retro) hardware today
Posted on 2021-02-11, 10:46
Bought two interesting (not the usual Cirrus Logic) VL-Bus cards. They've never been used apparently. Need to get memory upgrade for the Tseng so that it can benefit from bank interleaving.
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