How to slow down my PC?

The PC is executing commands far too quickly; I need to throttle the speed to allow the software to loop correctly.

I am looking for a solution for a developer who strictly utilizes Windows 98, yet is working on modern hardware. How can this be achieved?

Explain the computer-programmer connection a bit better. Probably enough just to toggle compatibility mode, you just gotta know exactly where...

The parallel port identified by address 378 (LPT2)

Here are a few slowdown "aids"...