The most tedious part was hand-converting the program to the bit patterns that had to be set via the switches. Talk about a mistake-prone task...
You don't have to do it for long before you see binary from hex and vice-versa—just like when you assemble, you soon you remember all the op codes except the few you almost never use. Now if we could just see jump distances without counting, especially backwards!
Quote:
When I got married, my wife didn't like my dining room furniture and insisted we replace it.
Women never were very good at interior decorating. I can just hear my wife again: "What is that thing in the living room? Can we get rid of it?"
After spending so much time I came to know there is some contacting problem arsing between these push buttons.....
when i pull them up the counters move in up ward address, while pushing down they don't count.
i have checked my circuit there is no problem in it, but there is some problem in this white and blue switches, please fig. this out what's that problem....!!
My counters are working correct but while using these push on/off buttons it count in one direction and other direction count 1 to 2 bits not exactly in order...
pulse _ _Vcc
C up _ _ Count down
_ _
Vcc pulse
_ _ are the terminal of double pole push switches...
Without my seeing your whole diagram, one possible cause of trouble that comes to mind is that you're using double-pole switches. These definitely will not make contact on the two poles at the same time, and even if they did, there will be bounce (I think you only took care of the bounce problem on one side) and the setup-time requirements on the counters' up/down inputs may not be satisfied. I'm not sure we can spot the problem and give you relevant help without seeing the whole diagram.
I never got into the 8085. The 6502 attracts me for its simple bus structure and the fact that its interrupt performance is much, much better.
