27 Jan
2006
27 Jan
'06
9:24 a.m.
On 1/27/2006 at 11:33 AM Joe R. wrote:
Photograph it yes but a schematic is MUCH more
involved since all dies
have multiple layers. It's sort of like trying to make a schematic of a
multilayer circuit board when all you can see is the top layer.
Ditto that--and recall that we're talking here about an old graphics
controller; no crypto and (relatively) very old technology. I'd rather
haul out the logic analyzer to figure out funcationally what the chip was
doing and work from there. Often, old house-branded chips turn out to be
some commodity product with a few special mods. Much of the design world
is evolutionary, rather than revolutionary--it's safer.
Cheers,
Chuck