VBM (VDC BitMap)
VBM (VDC BitMap) is a bi-level raster image format associated with the ACE operating system for Commodore 64 and 128 computers. It was developed by Craig Bruce.
VBM files begin with a signature of
'B' 'M' 0xCB, followed by a 1-byte version number that is probably always either
0x03. Note the similarity to the unrelated Windows BMP format.