Absolutely. You have given the general description of the entire 8254 architecture.

for your convenience.,

Here is the general block diagram.



and here is the block showing Counter block alone..



and here is the control word format that would be written to the ctrl word register.
Based on this data counter is getting selected , loaded and mode is programmed.



at present i have completed buffer,R/W logic and Control register blocks.
and now, implementing the counter block.
Here first iam concentrating on the Read and write operations alone.

iam doing the whole counter block in a single module.
In that case, how could i assign the 'out' value (being mode 'output')to the status register bit.
could you be little descriptive.

regard's
Suresh.