"-First debuted on the A3000T40 system, the 3640 is a 040 CPU board for the 200 pin FAST connector on A3000/4000 systems. It uses a 68040 with integral FPU and MMU, clocked at 25 Mhz. Many revisions of the board exist, with varying degrees of compatibility-some A3000 owners have installed the board successfully in A3000 desktop models, but the general idea is that Commodore found the 3640 too hot for the A3000. They can also be found in A4000/040 and A4000T40 systems, but the A3640 addresses onboard RAM in a slower 030 mode, making these machines slower in RAM access than the 030 models. Some units may have shipped with crippled LC/EC040 chips..."
It seem to me the CPU and motherboard are on different clocks...a timing thing.
could be the chips overheating...
try it without the cd-rom connected.(!?)
http://www2.shore.net/~mdevoe/3640cutandjump.htmlanyone else?
:-?
