MAMEWorld Forums - Programming

Hi guys

permit me in lieu of my more commonplace sobriquet, to post a puzzle.

Scouring these very threads for info, I have come across a function in MAME that allows a quite glorious imitation of the aged CRT monitors.
I am of course, referring to the HLSL functions and presets you can enable in the mame.ini file.

The puzzling part is, when I enable these functions, the system slows down to 60% of normal speed. I initially thought the system was too slow to run these new nostalgic graphical inclusions, but when I disable the throttle (F10) the system speeds up far beyond normal speed (100%).
So, either the system is too slow or too fast with these scan lines enabled.
I have no such problems when not using the HLSL functions.

Has anyone come across a similar problem? I trust that you will not be disinclined to acquiesce to my humble educational requests.

Scrumtrulescent