I have written few GLSL programs and i tested them on Radeon 9500 cards and they all seem to work fine giving the results as expected .
But when i tested the same programs on ATI R420 cards, i dont see any output on the screen ?
I checked the logs and it states shader linked successfully and will run in hardware.
What could be the possible reason for this varying output ?
Any hints , comments ?
Thanks in advance.