So I figured this should be posted as it is an amazing BIOS MOD for an amazing system. Comes with or without devkit intro. It is really useful for Dreamcast ODE users as it allows images to have any LBA of the 1ST_READ.BIN (aka the Dreamcast EXE) to make games much smaller, see README below. Also disabled the VGA check so no more need to force VGA for games that work normally but only with the "VGA trick" and has all the normal mods like region free. A newer BIOS is also on the way. Till then I hope you enjoy as much as I did flashing ym Dreamcast this evening. Note you will need a BIOS replacement as the stock has read-only access. New BIOS will be updated on 2015 when needing to do a rest, will show region of BIOS as well as disc info. Talks of modding the swirl color (blue, orange or black) without needing to a solder to enable access to the flash ROM as well. Settings would need to be stored on VMU just like the 3D BIOS mod. TEASER [ Dev Kit BIOS v1.03 Retail BIOS v1.03 SHA1 Hashes: jc-bootROM-retail-v1.030.bin: 1F385633B2438BAA1984C1194021DCA967B8D095 jc-bootROM-devkit-v1.030.bin: 96A4B580E26B1DC696004757F588647B8172961A SOURCE Can be easily flashed with Dreamshell or by building a standalone region changer with Bootdreams for an AIO disc. I prefer installing from SD card using Dreamshell 4.0 RC-3 as my system already has internal SD mod with SATA G1-ATA hack installed.