Re: How about a MR-BIOS ROM file repository?
Posted on 2020-02-17, 17:45
That sounds like a Pentium BIOS. I think most of those still exist. What we really need are 386 and 486 BIOSes.
Re: High DMA Woes (GUS, SB16, etc)
Posted on 2020-02-17, 10:05
Are the boards in question of 1993 vintage, and do they have discrete 86c206 system controllers?
Re: What is the name of this 'futuristic' racing game?
Posted on 2020-02-11, 10:37
Maybe it's Pepsi Man's car.
Re: Is ST486DX2-80GS cpu a cyrix cpu?
Posted on 2020-02-11, 10:35
To best compare the Cyrix to the Intel, you should run both at 66MHz in write-thru mode...and also make sure the Intel part is 5V, as the 3.3V version has an enhanced core. ...however, in the real world the Cx486 was normally run in write-back mode, and the intel in write-thru. Cyrix was an early …
Re: LFB bug in CL-GD5428
Posted on 2020-02-10, 10:43
There is a room for LFB as long as you don't max out your memory. Mach64 ISA for example benefits tremendously from LFB (I think they refer to it as "aperture"), but more or less limits you to 8MB on systems that use 30-pin SIMMs.
Re: Is ST486DX2-80GS cpu a cyrix cpu?
Posted on 2020-02-10, 10:21
Cyrix was a fabless CPU designer, and they outsourced the production to other companies such as ST, IBM and TI. Normally as part of the deal they would allow the other party to sell Cyrix chips under their own label. Sometimes there were minor differences between them, such as die process (which …
Re: Looking for a fast vesa local bus card for DOS gaming
Posted on 2020-02-08, 17:33
That's pretty retarded. Weitek was well aware that their VGA was slow, because every magazine pointed it out. The followup to the P9000 should have done something to address the problem. Instead all they did was integrate the mistake. Is it possible to disable the VGA core on the P9x00 cards and use …
Re: Looking for a fast vesa local bus card for DOS gaming
Posted on 2020-02-08, 03:09
The Diamond Viper VLB Witek 9000 isn't even used in DOS, you have a cheap Weitek VGA chip or an Oak Technology OTI087X using its RAM under an 8 bit path so DOS speed sucks. For some reason I've never owned a Weitek card before (probably because of their reputation for poor VGA performance), but my …
Re: Pentium 66 MHz vs 75 MHz shoot out (on a level field)
Posted on 2020-02-05, 01:55
But it wasn't that important as the 75 MHz was the only CPU to use the 50 MHz bus so IMHO it wasn't worth it. This may not be *entirely* true. As far as I recall there was a second (far less common) CPU from intel that used the 50MHz bus...a gimped version of the P100 that ran at 2x50 (probably a …
Re: L2 cache and 386 performance
Posted on 2020-02-04, 12:28
Baoran wrote on 2020-02-04, 09:07: I assume it uses 486 chipset because some version of the motherboard have bigger socket that accepts 486 cpu where the 387 socket is on mine Cool. I actually can't see the pictures because I'm behind the Great Firewall of China.
Re: Gateway 2000 G5-200
Posted on 2020-02-04, 08:43
Wait...does this system have P54C or P55C? At the top of the post you refer to it as P54C, but at the bottom you mention P200MMX.
Re: Upgrading Socket 4 L2 cache to 2048k (ECS SI5PI MB)
Posted on 2020-02-04, 08:40
It doesn't matter if 2MB is actually better. What matters is that it's working, so you have bragging rights.
Re: L2 cache and 386 performance
Posted on 2020-02-04, 08:32
Some 386 chipsets do not support 256kb cache even if they have sockets to accept it. I think the Octek Jaguar IV is a good example of this. It has two banks of cache sockets and can accept 32kx8 SRAMs, but 128kb (in a single bank of four 32kx8 chips) is the max supported by the Headland chipset that …
Re: Upgrading Socket 4 L2 cache to 2048k (ECS SI5PI MB)
Posted on 2020-02-03, 08:42
Ah, this is great. I've always wanted to see 2MB async cache in action. There are even a few VLB Socket4 boards out there that support 2MB, but I have never been fortunate enough to come across one.
Re: L2 cache and 386 performance
Posted on 2020-02-02, 04:56
It uses one of the TACT chipsets from Texas Instruments. However, the cache is not integrated into the chipset. It's inside that Toshiba branded chip with the -25ns marking.
Re: L2 cache and 386 performance
Posted on 2020-02-02, 03:54
BinaryDemon wrote on 2020-02-01, 23:43: I have a 386sx-20 with 16kb of chipset cache, it is a little snappier than I expected. Which chipset would that be?
Re: Need some info on a 286/16 SNB-M008 mobo
Posted on 2020-02-02, 02:58
Sounds to me like the extra memory just needs to be configured.
Re: I need information about certain CPUs' prices in 1997
Posted on 2020-02-02, 02:22
In 1997 the price of these chips varied a lot depending on the month. What started out as expensive in January would have ended up in the bargain bin by December.
Re: How to run your FPU asynchronously on 386 motherboards
Posted on 2020-01-31, 16:54
That's interesting. I wonder if it only applies to the 386DX.
Re: Compaq Prosignia 3080 / 486DX33
Posted on 2020-01-29, 10:31
So have you tested TIGA under Windows? My understanding is that it shouldn't be worse than 8514/A, which was it's main competitor. Apparently Hercules' main target market for their TIGA cards were Windows users. I've never owned a TIGA card, so I wonder if there is much variation in performance …
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