 The Mega-Drive doesn&#39;t use a BIOS per se, later revisions of the Model 1 MD, and all Model 2 MDs were given a boot ROM, which some would call a BIOS.<br><br>This boot ROM is where the &#39;PRESENTED BY, OR LICENSED FROM SEGA ENTERPRISES&#39; text comes from prior to the ROM loading.<br><br>The boot ROM is available on the net, as I have an ips to change the SEGA text from white to cyan. 