16 May
2003
16 May
'03
1:48 p.m.
On Fri, 16 May 2003, Frank wrote:
Sounds like you may have a signal integrety problem. try hanging a scope on the address and data lines and look for transients...
To show you how bad this can get. The last problem I had with an 8601 before I gave up was that a function got called from, e.g, address f8048. The return PC got pushed on the stack as something like f804c. These are not the exact numbers as this was a long time ago.
The data error was such that most of linuxbios was working, but in this case, bit 3 got corrupted. When the RET was executed, the return address was f8048.
Infinite loop. At that point I gave up.
These data corruption problems can be very difficult.
ron