Console Print speed difference

[davewareham]

I have developed a program written in PowerBasic that updates the screen (a console screen, not a standard windows screen) approximately once a second. I have been testing this out on 3 separate client platforms against an NT Server. The 3 client platforms are all hardware identical (PIII 1Gig) with the only difference being that one runs NT, one runs Win2k Pro, and the last one runs XP Pro. All three systems are running the exact same program, but 2 of the three are much slower.

The NT client system runs @ 1 second per pass as designed.
Both the Win2k Pro and the XP Pro systems run @ 3 to 4 seconds per pass with a noticeable ripple in the screen update. I have already checked to make sure they all have the latest video driver, high priority, and the same suite of programs running on each one. Is there some setting that would cause this ?

 

[CBCGB]

RAM win 2000 and XP are using more RAM

 

[davewareham]

I upgraded the systems in question from 512 meg to 1 gig but had no increase in speed. Could there be something else other than ram?

 

[bcastner]

Win2k and XP are more truely 32-bit OS than NT, and at best can only emulate DOS services.

Write in assembler some service routines to use BIOS services for screen writes.