Here is all the dumps I know of and a few hypothetical undumped alternates.
filename header info crc32 MPR#
MEGA-LD BOOT ROM
jp_mld_930329.bin 03/29-1993 17:00 0.98 BR 000001-0.98 00eedb3a
us_mld_930329.bin 03/29-1993 17:00 0.98 BR 000001-0.98 3b10cf41
us_mld_930922.bin 09/22-1993 17:00 1.04 BR 000001-1.04 50cd3d23
MEGA-CD BOOT ROM
jp_mcd1_911217.bin 12/17-1991 12:00 1.00p BR 000002-1.00 9d2da8f2
jp_mcd1_911228.bin 12/28-1991 20:30 1.00S BR 000002-1.00 550f30bb
us_scd1_921011.bin 10/11-1992 18:30 1.10 BR 000003-1.10 c6d10268
eu_mcd1_921027.bin 10/27-1992 15:15 1.00 BR 000004-1.00 529ac15a
CD2 BOOT ROM
jp_mcd2_921222.bin 12/22-1992 14:00 2.00c BR 000005-2.00 dd6cc972
us_scd2_930314.bin 03/14-1993 01:00 2.00 BR 000006-2.00 340b4be4 <- BAD DUMP
us_scd2_930601.bin 06/01-1993 20:00 2.00W BR 000006-2.00 9f6f6276
us_scd2_930621.bin 06/21-1993 16:00 2.11X BR 000006-2.11 2e49d72c MPR-15764-T
eu_mcd2_930330.bin 03/30-1993 12:00 2.00 BR 000007-2.00 0507b590
eu_mcd2_930601.bin 06/01-1993 20:00 2.00W BR 000007-2.00 4d5cb8da
CDX BOOT ROM
us_scdx_930907.bin 09/07-1993 19:00 2.21X BR 000006-2.21 d48c44b5
eu_mm_nodump ??/??-???? ??:?? 2.21X BR 000007-2.21
WONDERMEGA BOOTROM
jp_wm_sega_nodump
jp_wm_victor_nodump
WONDERMEGA2 BOOTROM
jp_wm2_nodump
us_xeye_931227.bin 12/27-1993 16:30 2.00 BR 000015-2.00 290f8e33 N/A
In addition to whats listed above theres also that Aiwa Mega CD boombox thing, who knows if that has a unique BIOS. If you have a CD BIOS dump not listed here please do post it!
Notice I'm also listing a MPR part # for one of the BIOSes, this is the one I own. My goal would be to have the MPR #s for all these. So If you have a sega cd/mega cd etc.. Id appreaciate it If you could dump the BIOS and share it's BIOS ROM markings. If you cant dump then just the rom markings is fine too (but without a dump you don't know exactly which BIOS they belong to).
I recently noticed that the Mega CD 2 JPN bios is on the utility disc for the ToToTek Mega cart. However, the files on the ISO arn't stored in a PC readable format. So I Opened the ISO in hex workshop and extracted all the BIOS ROMS. The ISO contained A set of Model 1 and Model 2 BIOS ROMs, I compared the extracted ROMs to the widely available versions. And indeed they were hacked, the Genesis/Megadrive region lockout was 4E75'd out, otherwise they were identical to already available versions (except mcd2 jpn ofcourse). Luckily the checksums wern't fixed. Checked the extracted mcd2 jpn ROMs checksum and indeed it fails. I then opened the ROM up in hex workshop and changed the 4E75 in question back to 6602 and saved, the checksum now passes, voila~ a good dump.. So here it is,
<img src="http://home.comcast.net/~deadscreem/mcd2jbios.PNG">
<a href="http://home.comcast.net/~deadscreem/mcd2jbios.zip">Download</a>
credit should likely go to Tomy from ToToTek for this dump, i'm just spreading it.
Also, apparently a Wondermega 2 and X'Eye BIOS were being traded privately via PM/email on the ToToTek forums <a href="http://www.tototek.com/phpBB2/viewtopic.php?t=1423">here</a> (arrghh!!). If any of you guys wanna get in touch with them please do. I want that Wondermega 2 dump (maybe the x'eye dump as well, if its different than the one I just dumped).