Here is an example of writing the character A for a font with a 1 bit color depth.
This 8x8 font would be written in as the 32 bit words below.
(This is based on an example in Table D-12, page 106 of the OSD Product Guide PG010).gcdata = 0x663C1800
Here is how this extends to the writing of the 16x16 font table.
This 16x16 Font would be written in as 32 bit words:gcdata = 0x01800000
Please see (Xilinx Answer 33257) for a detailed list of LogiCORE IP Video On Screen Display Release Notes and Known Issues.