Donald:

I was reviewing your post and realized I forgot to mark these two instructions on my opcode chart. (Please reference the chart on my 8052.com web page). In review I can see that I neglected to put on the J2B and J2NB opcodes in the 0xA5 opcode box that is currently showing "???". Here is the appropriately updated section of the opcode map.



Note that the selection of the particular opcode J2B and J2NB is made by proper interpretation of the carry flag at the time of fetching the A5 opcode.

For all of you that downloaded or printed the opcode map from my web page please pencil in the above information. I appologize for any inconvenience this omission may have caused.

Michael Karas