Thanks Dave,
Basically I'm stuck feeding a VGA/RGB signal (from a converter that outputs VGA) to the 7401 on the VGA input (AIN1-3) as I am restricted by hardware... End goal is to have this 7401 chip feed an FPGA to output STANAG3350B which to my knowledge is similar to PAL 50Hz. Some software wizardry needs to occur in the FPGA so if I can give my FPGA guys something to work with in PAL format (or close), it makes life easier.
Refresh rate is an issue as well... Can the VGA input on the 7401 accept 50Hz? I can't seem to find register settings for anything lower than 56Hz.
Please correct me if I'm wrong but it appears as though VGA input restricts me to register 0x05 PRIM_MODE=0010 (analog graphics) and corresponding VGA/SVGA/XVGA resolution settings in the 0x06 VID_STD register.
Thanks again for your continued help.
Kevin