>There were clip over CPU upgrades for PCs to bump up
>from a 386SX to 486 or 486SX to 486DX. Those CPUs
>are usually surface mounted and the 486SX has more
>pins around it than the 030 does in its "J" lead
>package. (Same type of package can be surface
>mounted or used in a PLCC socket.) How that worked is
>the x86 SX CPUs have a "float" pin that when pulled
>high (or was it low?) shut the chip down and
>"disconnected" it from all the other pins.
>The float pin was originally intended for use in
>low power sleep mode for portables. Intel used it
>on the 486SX so that a "487DX" (actually a full
>486 with a slightly different pinout) could take
>over from the soldered on SX CPU.
>
>Any idea if any variety of 68000 or other 68k CPU
>has a float pin?
Back in 1993 I had a MicroMac accelerator on a Mac Plus. It used a
Killy clip. It clipped on to the 68000 and connected to the
accelerator card.
So in answer to the question, there must be a way.
--
-
Bob Poland
[EMAIL PROTECTED]
Check out my garage sale http://www.ibrb.org/
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