On or about 2007-05-11 22:09, Lord Garth is reputed to have said:
Has anybody definitively identified the BOB (Blob On Board) in the attached
photo? One forum says it is a Hitachi HD66710

(http://www.hardforum.com/showthread.php?t=761414)

After tracing the board and looking at the data sheet for the HD66710, I
can't
reconcile the chip pinout to the actual circuit. I believe the BOB has at
least
110 pins if one begins counting vias where 78 & 79 are screened. Since 110
isn't evenly divisible by 4, I'd guess that not all the pins are brought
out.

You're assuming that the die is square. Die shape is determined by
minimizing the die area within the constraints of the layout and the
packaging. Your part could easily be a 27x28, 25x30, 20x35, 15x40, etc.
In the picture, the blob looks oblong so a rectangular die is probable
-- I'd guess at 25x30 from the shape.