geo@uunet.uu.net (George Pontis) (03/01/89)
The addition of the 68881 to a 3-50 is really easy. It requires only that the circuit board be removed from the chassis by removing the 4 allen head screws and flipping the card extractors outward. ( Use common sense with regard to static discharge precautions. ) On the board there is a square outline pin-grid array socket marked "68881". In this you plug in a Motorola MC68881RC16A or MC68881RC16B, which an Oct. '88 price list shows Qty 1-4 @ $171. Be sure to provide some support under the socket when plugging in the chip to avoid excessive strain on the adjacent circuitry. You can expect that it will take quite a few pounds of force to seat the chip in the socket. There are no config switches or jumpers. For your info, there is also an empty socket for HW support of DES using, I think, an Intel chip.
guy@uunet.uu.net (Guy Harris) (03/14/89)
>For your info, there is also an empty socket for HW support of DES using, >I think, an Intel chip. "/usr/include/sundev/desreg.h" on our 4.0 system: /* @(#)desreg.h 1.12 88/02/08 SMI */ /* * Copyright (c) 1986 by Sun Microsystems, Inc. */ /* * Definitions of the AM Z8068 Data Ciphering Processor chip. */ I think there's supposed to be a "D" after the "AM", as in "AMD"; in any case, it's not Intel.
peter@uunet.uu.net (Peter Ilieve) (04/04/89)
auspex!guy@uunet.uu.net (Guy Harris) writes: (here he quotes from someone unknown) >>For your info, there is also an empty socket for HW support of DES using, >>I think, an Intel chip. ... >"/usr/include/sundev/desreg.h" on our 4.0 system: ... >/* > * Definitions of the AM Z8068 Data Ciphering Processor chip. > */ > >I think there's supposed to be a "D" after the "AM", as in "AMD"; in any >case, it's not Intel. It is AMD, but its name was AmZ8068. It came from the period when AMD believed the Zilog Z8000 family was the way to go (before they changed to 80x86 and long before 29000) and so had a Zilog-like number. I knew my ``AmZ8000 Family Data Book'' (1980 vintage) would come in useful one day :-) Peter Ilieve peter@memex.co.uk