Re: Fast 486 vs entry Pentium
Posted on 2020-06-08, 10:11
Diamond Stealth 64 Video 2001 ( S3 Trio64V+)
Re: Fast 486 vs entry Pentium
Posted on 2020-06-08, 09:31
I wanted to keep overclocking out. However, AMD actually produced a rare 5x86 - 150 P75+ version. So perhaps I could include that for completeness and simulate it by overclocking the 133 version as I don't have the chip. The best I could achieve at 150 Mhz was ~16.4 in Quake. It is even slightly …
Re: Fake painted Pentium CPUs
Posted on 2020-06-08, 07:22
I wonder, did they make gold top Socket 7 Pentiums or just Socket 5? I'm pretty sure Pentium 75 and 100 existed in both Socket 5 and Socket 7. "Socket" is a property of motherboard, not CPU. Socket 5 has 320-pins, Socket 7 has 321 pins. Regular Pentiums have 296 pins (no matter if PGA, CPGA or …
Re: Reasonably priced VLB card
Posted on 2020-06-07, 21:57
If all you want is to play games DOOM and similar games then a piece of good news is that VLB card type doesn't matter. They are all very close to each other. I'd take a S3 805 if you can see one.
Re: 386 mainboards without cache
Posted on 2020-06-07, 19:09
Are you certain the board has no cache? If it uses the MX chipset, it has an 8kb integrated cache that is roughly equal to having 64kb of external cache. I am wondering about this. Is this really equal to 64kB cache? With only 8k, not even a fully-associative cache would have been that efficient. I …
Fast 486 vs entry Pentium
Posted on 2020-06-07, 14:21
I always wondered how entry-level Pentiums 60/66 or 75 compare against some advanced 486 designs like 5x86's. So I've done a benchmark test comparing various 1993-95 CPUs in a number of areas and if the P75 rating of these chips is justified. https://dependency-injection.com/wp-content/uploads/2020/ …
Re: Bought these (retro) hardware today
Posted on 2020-06-05, 13:13
Got this one. Some people say it is the fastest 486 chip 😀
Re: Questions for an early 1995 Pentium config
Posted on 2020-06-04, 11:29
Yes. In DOS the acceleration doesn't matter and no need for fast VRAM or high-speed DAC. Unless you talk AutoCAD or other professional software. My S3 Trio64 delivers identical performance in DOS no matter if you clock it at 46 or 80 MHz or if using the slowest FPM or 1-cycle EDO. Even Trio32's …
Re: Questions for an early 1995 Pentium config
Posted on 2020-06-04, 10:43
In 1995 the landscape of PCI cards was roughly as follows: premium segment: - S3 964 or 968 VRAM based cards from many vendors (incl. Diamond, ELSA, Miro, Hercules,#9, STB, ...) The 968 has some basic video acceleration but other than that it is the same thing - Weitek P9000/91000 based cards from …
Re: Compaq Deskpro M and XL models.
Posted on 2020-06-04, 07:51
The PPRO card looks great. But I wonder if a CPU card with such a little glue logic can really work on system boards designed for Pentium (or even 486?). Are this cards compatible as soon as they fit into the slot? I have this system board (004321-001 or 004320-001). I am trying to find out if ti …
Re: Early Pentium Chipset Comparison
Posted on 2020-06-03, 21:00
The P75 is touching one of my other projects. I will have some numbers soon... But it is mostly like it was said and even the FX won't change the landscape that much. For the chipset comparison I've chosen P133 since it is the CPU that allows me to compare all Pentium chipsets (Socket 4, 5 and 7) …
Re: EISA Graphics / Video Cards
Posted on 2020-06-03, 20:49
Nice. Surprised there was even a box, etc.. I'd thought QVision being Compaq was OEM only card shipped only inside their PCs.
Re: Early Pentium Chipset Comparison
Posted on 2020-06-03, 14:10
Thanks at least I know what it is. I could find any useful stuff about the board (BIOS, manual). However, I found datasheet for the chipset with register info. So perhaps I can write a tool to compensate lack of BIOS options with some programming...
Re: Early Pentium Chipset Comparison
Posted on 2020-06-03, 10:33
No. But perhaps it can be established from the POST string: Filename IMG_5523.jpeg File size 1.33 MiB Views 1671 views
Re: Early Pentium Chipset Comparison
Posted on 2020-06-03, 09:59
As for the L2 - I am testing all combinations - 256kB / 512kB / 1024 kB async as well as 256kB and 512kB PB COAST modules. PCI VGA and EDO RAM. Configuration options are sparse on this board. Here is the full board: DSC_7442 (1).jpeg I had another Opti Viper board which worked fine although that one …
Re: Questions for an early 1995 Pentium config
Posted on 2020-06-02, 15:15
They are usually right. But there could be a confusion. P120's were made using 0.35 μm process but the die size and transistor count is identical to 0.6 μm chips. So pick the number you want 😀
Re: Questions for an early 1995 Pentium config
Posted on 2020-06-02, 14:59
Even the earliest P120 were 0.35 μm with unique P54CQS process. IMHO the P120 is a perfect CPU for the Millennium. The P75 isn't that slow in Quake. In fact your 21fps is well above whats possible for any 486. No matter how much you overclock it. Socket 5 with VLB was very unusual. There were VLB …
Re: Questions for an early 1995 Pentium config
Posted on 2020-06-02, 13:30
I don't believe there was a P54CS version of the P75 (as soon as it is not a mobile chip or something) .Btw the tech was 0.6μm (not nm that would be way too cool). There is no way for these tools to detect the transistor size, so they need to assume it from the CPUID response and likely got it wrong …
Re: Which hard drives can you use with a Pentium 75 (socket 5) computer?
Posted on 2020-06-02, 11:34
See this one for instructions how to dump a memory location using debug: http://mess.redump.net/dumping/dump_bios_using_debug The logo should be in the 8K block between ED000h and EDFFFh Perhaps there are some more friendly tools that can dump stuff from arbitrary location. But I'd need to spin up …
Re: Early Pentium Chipset Comparison
Posted on 2020-06-02, 11:16
As I am covering more S5 chipsets I have to deal with some really quirky ones. Right now I am testing the Opti Viper-M 82C556/557/558. This is the most problematic chipset so far. At least the motherboard I got iis not compatible with DOS4GW extender (just hangs). First time I experienced that . …
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