VOGONS


First post, by SRQ

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Without a mouse for my 486, or some sort of virtual keyboard to mouse TSR, I'm gonna have to use the PII 233 system I have to play Alien Legacy and some other things.

However, Alien Legacy seems to run too fast on anything past a first-generation Pentium. It's minor, but some animations are extremely jarring, etc.

So what can I do to slow down a PII in software? A PIII? What's the 2016 solution for software based slowdowns?
Semi related: What's the newest thing that had support for turbo? If I understand right it would be physically impossible after the first Pentium.
Unrelated: What does the P in P5/6 mean? Pentium: 586?

Reply 1 of 14, by Rhuwyn

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You could experiment with disabling the cache in the bios and see if that does it. Have you considered using DOSbox on a more modern system?

Reply 2 of 14, by SRQ

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Rhuwyn wrote:

You could experiment with disabling the cache in the bios and see if that does it. Have you considered using DOSbox on a more modern system?

Yeah but I'm sure folks around here know the JOY of real systems.

Reply 3 of 14, by Rhuwyn

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If you want a system you can slow down you are looking at a K6-2/3 or VIA CPU. I don't think there is much you can do with a P2 unless the multiplier is unlocked you can under clock it and disabling the cache does do a lot in that department as well.

Reply 4 of 14, by SRQ

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It might be unlocked, it's a Dell XPS D233 and has has a "maintainence mode" on the bios that allows for setting the processor from 200-450 (lol) Mhz.
Dell /literally/ left the ability to overclock for anyone who was into that, kinda weird/neat.

E: Hmm, searching around it seems that the multiplier is unlocked, but the bios hides most of the options. Is there any way to try a 66x1 fsb/multiplier through software?

Reply 5 of 14, by Rhuwyn

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Only way I am aware of setting multiplier by software is the setmul utility which I believe only works with K6, VIA, and certain Cyrix CPUs.

Reply 6 of 14, by SRQ

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50 to 133MHz FSB on a BX Mainboard

This thread seems to have some info, gonna try that out in a bit. 50fsb x2mult would equal a first-gen P100, I think- except with MMX and some other instructions, which I assume this game would just ignore.

Reply 7 of 14, by Imperious

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There are bios tools that can unhide options. If You can dump it and upload here, I can give it a try for you.

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Reply 8 of 14, by SRQ

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What tool do you prefer I use?
E: Although actually, this is like- a very, very, important system to me so that might be a bad idea.

Reply 9 of 14, by Imperious

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Unless You screw up badly the tools are nearly foolproof. If it's a AMI bios, then an old version of AMIBCP will do the trick.
If it's a Award bios, then Award bios editor. Old versions are required for these old bioses.
I have done this on my 486 and Athlon XP motherboard bioses, no problems encountered.

Atari 2600, TI994a, Vic20, c64, ZX Spectrum 128, Amstrad CPC464, Atari 65XE, Commodore Plus/4, Amiga 500
PC's from XT 8088, 486, Pentium MMX, K6, Athlon, P3, P4, 775, to current Ryzen 5600x.

Reply 12 of 14, by Deksor

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Imperious wrote:

Unless You screw up badly the tools are nearly foolproof. If it's a AMI bios, then an old version of AMIBCP will do the trick.
If it's a Award bios, then Award bios editor. Old versions are required for these old bioses.
I have done this on my 486 and Athlon XP motherboard bioses, no problems encountered.

Where did you find an old version of AMIBCP ? I'm very interested

Trying to identify old hardware ? Visit The retro web - Project's thread The Retro Web project - a stason.org/TH99 alternative

Reply 13 of 14, by gerwin

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SRQ wrote:

Is there any way to try a 66x1 fsb/multiplier through software?

No, Pentium II/III cannot be jumpered to run at 1x multiplier. 2x is the lowest possible with a Pentium II (early production), on the right motherboard that is.

--> ISA Soundcard Overview // Doom MBF 2.04 // SetMul

Reply 14 of 14, by keenmaster486

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SRQ wrote:

Unrelated: What does the P in P5/6 mean? Pentium: 586?

Yeah, I would guess because it was a "586" and they called it Pentium, so you end up with codename "P5". I don't know what, for example, "P54C" means though.

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