387 emulator tools \ VOGONS

387 emulator tools

Topic actions

First post, by noshutdown

Posted on 2017-12-17, 15:22

noshutdown Offline

Rank Oldbie

Rank: Oldbie
Posts: 1329
Joined: 2010-07-23, 17:04
Location: China

well i actually have a cyrix fastmath(which isn't too hard to get after all), but just wonder how a computer would perform without one.
the most famous 387 emulator seems to be q387 and frank387, can anyone tell me how well they work? and can they work with win95 programs like superpi?

Reply 1 of 1, by matze79

Posted on 2017-12-17, 17:03

matze79 Offline

Rank l33t

Rank: l33t
Posts: 2989
Joined: 2014-12-12, 14:25
Location: Germany, Frankonia

no they don't work with Windows 95 SuperPi and co.

Also Windows 95 has its own FPU Emulator.

They use FPU Exception Interupt and instead of processing data with fpu, its processed with the Software TSR.

mostly you will not notice any difference on this old systems.
Because most software does not use FPU.
Its using fixed point arithmetic.

https://doomwiki.org/wiki/Fixed_point

1In a fixed point system, a 32-bit integer is split into two parts, the upper 16 bits are the integral part, and the lower 16 bits are the fractional part. For example, the value 2.5 is stored as 1 638 400.

Go to top of page Go to top of page

Back to General Old Hardware