Katana V2.1 Main Board

[special]

I'm trying to perform the G1-ATA mod on my Dreamcast and I can't find any information on the main board.

The Dreamcast is from late 2000. There are only 3 boards. Main board, power board, controller board. No GD-ROM board, no big 50 pin connector. The GD-ROM drive connects to the main board directly. Spindle motor drive, laser, servo all connect to main board with separate cables.

All the schematics I can find are for the V1 board. Does anyone have any info on the V2 board?

EDIT: Added pictures

Spoiler (Click to View)

[SWAT]

No schematics for your board
You need find all pins manually, It's more easy to do if you have VA1 board for comparison.

[MetalliC]

(30.09.2014 04:51)special писал(а):  I'm trying to perform the G1-ATA mod on my Dreamcast and I can't find any information on the main board.

I'm afraid VA2.1 haven't G1 bus connector at all, so the best you can do - trace G1 leads from HOLLY chip and solder wires directly to PCB.

btw, what is BIOS label on yours 2.1 board ? its not clearly seen on photos, IC501 MPR-something unreadable.

[special]

BIOS chip (IC501 44-pin):
SEGA
MPR-21931-X1
022

[MetalliC]

thanks for info