Is there a full/partial dissassembly of the Sega CD BIOS?

Ask anything your want about Mega/SegaCD programming.

Moderator: Mask of Destiny

Post Reply
db-electronics
Very interested
Posts: 89
Joined: Mon Feb 24, 2014 6:04 pm
Location: Kapuskasing, Ontario, Canada
Contact:

Is there a full/partial dissassembly of the Sega CD BIOS?

Post by db-electronics » Sun Apr 19, 2015 2:56 pm

As the thread title states: is there a full/partial dissassembly of the Sega CD BIOS?

With the recent release of the Dreamcast SD loader - I think it would be worthwhile to at least examine the possibility of building a similar device for the Sega CD.
What does db stand for? Well that's an excellent question...
http://www.db-electronics.ca

bastien
Very interested
Posts: 208
Joined: Mon Jun 25, 2007 7:19 pm
Location: Besançon,France
Contact:

Post by bastien » Mon Apr 20, 2015 4:57 am

Did you have a link for this recent reoease ?
Launching homebrew with SD on dreamcast is possible since a long time.

db-electronics
Very interested
Posts: 89
Joined: Mon Feb 24, 2014 6:04 pm
Location: Kapuskasing, Ontario, Canada
Contact:

Post by db-electronics » Wed Apr 22, 2015 2:48 am

bastien wrote:Did you have a link for this recent reoease ?
Launching homebrew with SD on dreamcast is possible since a long time.
Here's an article from Retrocollect about the Dreamcast SD loader:

http://www.retrocollect.com/Reviews/har ... ement.html
What does db stand for? Well that's an excellent question...
http://www.db-electronics.ca

DarkMorford
Interested
Posts: 15
Joined: Tue Mar 17, 2015 4:09 pm
Location: Redmond, WA

Post by DarkMorford » Thu Jul 02, 2015 3:36 pm

I started working on disassembling the US 2.00W BIOS a couple weeks ago. It's all still in an IDA Pro database file at the moment, but I'll see if I can't chop it up and put it on GitHub or something this weekend.

MrTamk1s
Very interested
Posts: 75
Joined: Sun Jan 04, 2015 10:27 pm
Location: Pennsylvania
Contact:

Post by MrTamk1s » Sat Jul 04, 2015 5:13 am

This article on Kaneda's front page of SpritesMind should get people started on basic technical information about the Sega CD's operation.

Also, from the same developer is a SD card loader replacement for the Sega Saturn called Rhea. From a hardware standpoint, a Saturn is essentially a Sega Genesis CD 32x with additional, and better unified hardware, and I believe the CDC protocal in the Sega CD and Sega Saturn are similar. Might be worth to see what is similar between both CDC protocals and what SD Card loader hardware/code techniques could be adapted/retrofitted to the Sega CD.
SGDK homebrew dev and Unity3D Indie dev.
Sega does what Nintendont!

Post Reply