Award BIOS logo
Award BIOS logo (also known as EPA or AWBM) is a family of image formats associated with Award BIOS firmware. These formats are used by those who wish to change the image shown on the boot screen of certain computers.
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Format
There are at least two main versions of the format, sometimes called "version 1" and "version 2". Additionally, different versions of the BIOS have different restrictions on the size of the image, etc. There is evidence that different BIOS versions may even render the same file differently.
Version 1
Version 1 has no identifying signature. The BIOS renders the image in text mode, by customizing the character graphics. Consequently, each 8x14 block of pixels can use only use two different colors.
There are usually two images in the file, the second being the small blue Award logo that also appears on the boot screen.
Version 2
Version 2 files begin with a signature of "AWBM". This is a more typical kind of image format, not based on character graphics. It appears to support at least 4- and 8-bit paletted images.
