Dreamcast

What binhack does

Changes LBA Value at offset 1461904 ( 8 Bytes before CD001 string) from 6EB0 (45166) to LBA Value+166 specified during binhack.

Adds Region Codes for JAP,EUR and USA and strings for that. Adds some bootcode, probably SH4 ASM to make the GDROM accept CDRs.

What cdda does

Changes some bytes, probably SH4 ASM to enable playback of CDDA tracks.

What dahack does

Changes LBA Values at offsets 1301408,1302380 and 1461904. First 2 offsets get rewritten from 5EB0 (45150) to 9600 (150). Third offset gets rewritten from 6EB0 (45166) to LBA Value+166 specified during dahack. 3rd offset change is basically the same what binhack does.

What hack3 does

Changes LBA Values at offsets 1301408,1302380 and 1461904. First 2 offsets get rewritten from 5EB0 (45150) to LBA Value+150 specified during dahack. Third offset gets rewritten from 6EB0 (45166) to LBA Value+166 specified during dahack. 3rd offset change is basically the same what binhack does.

LBA 45000 Trick

69120000 bytes in first session will result in LBA 45000.

Fill 1st Session ISO File to 69120000 bytes with zeros

6912000 bytes = 33750 2048-byte-sectors

CORRECTION : Must be 33598 Sectors !!! = 68808703 bytes

1st Session Leadout = 11250 Sectors = 23040000 Bytes

2nd Session will start at Sector 45000

dd if=/dev/zero of=<ISOFILE> bs=1 count=1 seek=69119999

Creating & Burning DATA/DATA ISOs

1. mkisofs -l -duplicates-once -V <DISCNAME> -o <OUTPUT1.ISO> <DIRECTORY_TO_GAME_DATA>
2. cdrecord -v -multi -tao -xa <OUTPUT1.ISO>
3. cdrecord -msinfo
4. mkisofs -duplicates-once -V <DISCNAME> -o <OUTPUT2.ISO> -G <IP.BIN> -M <OUTPUT1.ISO> -C <MSINFO VALUE> <SMALL FILE FROM DIRECTORY_TO_GAME_DATA, take 1ST_READ.BIN>
5. cdrecord -v -tao -xa <OUTPUT2.ISO>

Merging track03 & track05 into one file

Create dummy file first Calculate 1185760800 - <SIZE OF track03.bin + SIZE OF track05.bin>

dd if=/dev/zero bs=1 count=0 seek=<RESULT> of=dummy.bin
cat track03.iso dummy.bin track05.iso > combined.iso

This also helps when extract.exe only outputs garbage out of track03.iso along with track05.iso. This way only the combined.iso needs to be extracted.

Burning DATA/DATA CDIs

cdirip <CDIFile> <Destination Directory>
cdrecord dev=/dev/sr0 -v -multi -tao -xa tdata01.iso
cdrecord dev=/dev/sr0 -v -tao -xa tdata02.iso