oric_dan:
lefty, as I remember in most of the prior discussions, you were using the 644 chip.
So, I assume you eventually got and tried the 1284P chips, and all is working
well with those?
That is correct, both the 644P and 1284P chips are working fine using CrossRoads through hole 1284 board and both chips loaded with optiboot and using the maniac's hardware files. As I said I never saw a serial problem with either chip but was following the thread where several were and they tried various fixes including a R/C filter on uart0 rec pin, but I though all found that changing the low fuse byte cleared up any uart0 problems?
Lefty