On 4/29/07, Peter Stuge stuge-linuxbios@cdy.org wrote:
On Sun, Apr 29, 2007 at 08:06:08PM +0200, Quux wrote:
it is an empty plcc32 socket to flip over an soldered in flash chip. attached to the socket is a secondary flash mem and some circuitry to handle the "chip enable" signal, i.e. pull down the primary one and daisy chain the data/addr bus.
I'd love to find out more about exactly how this is done.
Probably a lot like the TiVo PROM back-to-back socket. Basically two plcc32 sockets soldered back to back with a few pin tweaks. Yet another variation on dead-roaching or piggy-backing a chip.
"tivo prom piggy" should get you there as a search query. I've occasionally wondered how hard it would be to have something like this manufactured, thereby bypassing the whole TopHat / BIOSSavior vendor specific issue.
Regards, -dhbarr.