detailed questions about Segagen

[bobcat_816]

I am also having problems making a selfbootable Segagen disk. I am using the Ultimate Selfboot kit from dcemulation to make the disc. CDRWIN does not recognize my dvd burner either so I am having to use cdrecord. Bucause of that my LBA offset is 11702. I am using the Lemec selfboot patch and reading through some similar threads I found that 1st_read.bin and manifest.bin are supposed to each have 2 occurrences of 5A2E in front of CD001, which are supposed to be hacked to 5C2E for the 11702 offset. One of my problems is that I can find the 2 instances of CD001, but only one instance of 5A2E. So I hex edited what I could find to 5C2E. In the other 2 bins I couldn't find any instances of 5A2E. So, anyway I started up Ultimate selfboot and burnt the CD. The disc boots up properly and I can see all the files, but when I go into the roms folder and try to start a rom, it resets. Does anyone have any ideas?

[bobcat_816]

I finally figured it out after about 100 CDs (I know that sounds a little extreme, but I wanted it that bad). My major problem was that in using cdrecord, it always set the offset to 11702 while obsidian is set to 11700. I tried to use cdrwin, which supposedly would burn audio.raw to 11700, however it wouldn’t recognize my burner. I even followed someone’s advice and use cuttrack to chop audio.raw down so that it would burn to 11700, but no matter how far I trimmed it down to, the offset was still 11702. So next I had to resort to hex editing. In reading some of the threads on this forum the general consensus was to change the 7th and 8th bytes in front of every occurrence of CD001 in the 4 bin files. Supposedly 1st_read.bin and manifest.bin had 2 occurrences of CD001 and the other 2 bins had 1 occurrence each. This was true, except that the 7th and 8th bytes were supposed to be 5A2E and were supposed to be changed to 5C2E. The problems with my files was that ginreset.bin and mde_us.bin had no occurrences of 5A2E and the other 2 bins only had 1 occurrence each of 5A2E. I read on these forums that a few other people have had this problem, and could not find anyone that had a solution to it. So what I finally decided to do was hex edit the 7th and 8th bytes in front of every occurrence of CD001 in those bins, whether or not 5A2E was present. I then used Ultimate Selfboot to create and burn the disc and it finally worked. It doesn’t look like there are that many people still trying to get segagen to work, but if you still are, I hope this helps.

[darklegion]

If you want the first track to end at 11700,you need to burn it in sao/dao mode.CDRWIN works by default because it burns in dao by default while cdrecord burns in tao by default.Add -sao for the first track(audio.raw or whatever) for cdrecord 2.x.For cdrecord 1.x it is probably -dao instead of -sao.