BigWumpus,

You're right. I wasn't getting the bytes out of the Buffer fast enough. I tried a few things to empty the buffer faster and that helped. Now I don't have an Overflow problem, but I've managed to screw up the result that goes back to the Master when it asks for data from the Slave. I've got to go back double check the emptying and filling of the buffer.

I'm going to go back a step and make sure I've got the Master pulling data from the Slave perfectly. I'll take it up to 20 bytes or so to make sure. Once that's done, then I'll work again on sending data from the Master to the Slave. When I quit yesterday, I had it receiving two bytes (three if you count the address byte).

We're getting very close. I'll post working code as I accomplish these tasks.

Rswain