PG wrote:
This is a cool project!..:-)
But i agree with alexh, try to get an MC68060 with the 1E41J mask instead, a much better cpu.
There is one more thing about the Blizzard 1240.
I know there are some people who has upgraded this card to 1260, but will only changing the cpu really do it?
What about the firmware, this should be upgraded to, for optimizing the cpu?
And another thing, both the Apollo and Blizzard turbo cards have multilayer PCB.
You have to think twice about how to desolder the cpu, if you use an ordinary desoldering station, there is a big risk that you will destroy the PCB.
If one is very very slow and methodical, an easy way to do this is to take an exacto sawblade, and saw off the pins on the original chip. You will need to remove the spot welded header on the blade, so it will be flat. It would take a lot of time to cut off the pins, and make sure the pcb underneath the chip doesnt get scratched. Then you end up with a pile of pins that you can hold onto with some hemostats and bump the undersides with the iron, then clean up the holes with some ribbon, pop in the new chip and tack on all the new pins.
Not too hard, just requires much patience and carefullness.
