I do appreciate that you took the time to respond. I think I need to make myself clearer than I had before. I am almost exclusively involved with small microcontrollers like the Microchip PIC series and the Intel line like the older 8085 structures. I have NEVER used a PIA before. When you saythings like "write a 0D to the control register" it is virtually meaningless to me because I don't know the proceedure. This is a very confusing chip for the novice to pick up. I've been doing micro's for quite a while, but this data sheet stuff is written as if one plumber is telling another plumber how to install a sink. Both plumbers pretty much know how to do it already. I need someone to help me as if the plumber was telling a shoe salesman how to install a sink.
I there a way for anyone to write simple instructions like;
1- put [0d] on the data bus
2- pulse the [e] line
3- put [14] on the data bus
4- pulse the [e] line
and so on. What I want to do is simply make both ports output ports. I need to then succeccively write all 1's and then all 0's to both ports. THAT'S IT!
I have no familiarity with, or access to any motorola 6800 equipment, but my ATE can create any 8 bit word I need and any kind of positive/negative pulses and address lines you tell me to create.
I feel like such an A-Hole because I've beeen going over the data sheet again and again, and I can't grasp how you address different registers that have the same address.
When I finally see how it's done I know I'll feel even worse, but my back is against the wall because I have to ship this controller board to the U.S. Army, and my time is just about all gone.
Can someone please help me.
