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That's the problem with using hardware to clock your game cycles, we just don't know what the future will bring.

I've read good things about Mo'Slow and Bremze. Mo'Slow was at least updated through 2006 and says it works with XP, but Bremze development appears to have stalled in 2002.

Wow, makes me feel rather unoriginal for just using MoSlo...

As to the installer, I feel your pain. I have a number of things written in old TP, and there seemed to be something different about the installer - as though it used the CRT code calculation, but wasn't written in TP.

It did seem to be a one-time check, though, in the installer as well as in TP programs. I don't know what other modern equivalents there are to Mo'Slo, but from what I remember trying to install it on a 333 Mhz PC (who knows if there are more issues now?), it just needs to be slowed down to old computer speeds right at the beginning of the install. Perhaps a high-priority greedy process might work in a pinch.

Do it once, put in the hacked crt.tpu files and the like, and back up the whole directory structure.

Klaus Hartnegg has an astonishing variety of fixes for the problem as well (including replacement units, ways to put the fix into CRT.ASM directly, and .exe-patching utilities), stored on his site to lessen any dead link troubles.

Man alive, all for want of an algorithm that was forward-looking enough to predict 200 Mhz machines :)

Yup. MOSLO is good for that. How many games can you find written in BASIC with a timer calibration loop that bombs out with a divide by zero on startup?

If you actually want to slow down your cpu for playing old games, theres a great program that does it for you called Mo'Slo you can get it
Here

It was one of those old games that didn't properly handle increased clock rates

Dude, even Warcraft 2, and -- the greatest game of all time -- Ultima 7 don't handle increased clockspeed gracefully.

Fortunately for you and I, there's Mo'Slo! (www.hpaa.com) You run it like moslo /xx c:\full\path\to.exe, and the xx is the percent of your processor speed you want.

So to run CGA games, you just run them using only 10% of the processor. (You have to fiddle with it to get the speed right.) Breathes new life into all your old nostalgia-inducing games. (And, it's free as in beer for the "Trial" version, which is more than good enough.)

I've seen this come up a few times in this thread, without, apparently, someone posting the obvious:

if you want to run an old DOS game on new PCs and it runs too fast, get moslo.

Instead of keeping way old pc's which are near of their mobo capacitors bogging down, you'd get Mo'Slo.

Useful to make some DOS games running at a decent speed (e.g. 60 fps, nor 850+ fps) on a Pentium3 or Athlon.

You could make a boot disk to free up "conventional" RAM, also. Most Microprose games for DOS let an option to make efficient bootdisks. You should add some lines in Autoexec.bat and Config.sys, though, usually paths to your device drivers (sound, CD-ROM) and devices' configuration.

Add these lines to MSDOS.sys, attempting to only change their value to "0" if they already were in MSDOS.sys.

[options]

drvspace=0

dblspace=0

Mo'Slo is what you're thinking of, I think.
Mo'Slo

There's also Turbo, (which I have never used).
Turbo

rainbowfyre

Why not just download Mo'Slo?

It's described on its homepage as a set of "CPU Slowdown Utilities".

It's crippleware, but the only thing the cripple keeps you from doing is slowing down in fractional increments. A friend of mine uses moslo extensively on his win box, unregistered, and it works fine.

I would bet it works under dosemu as well.

They actually have two copies, Mo'Slo Deluxe, and Mo'Slo BIZ. It even has in-program speed adjustment.

Really. Check it out.

-ed fisher

Won't run them at all or they just run too fast to be playable? I ran into this when I tried to play commanche on a pentiumII and it was just too fast.

If this is the problem you can try moslo to slow your computer down to make the game playable. It works. (then you can give your older machine to me :-) )