How
8085 simulator works? You must follow
the exact instructions as given in chronological order to take a
tutorial 8085. The programme is written from the Code Key Pad. Coding
sheet will automatically able and disable buttons according to
instruction. This prevents any wrong instruction and helps in learning
the syntax of instructions too. Enter an instruction. MOV A,B. Click on the MOV
button , then Click the A button and then the B Button. You will find
that the correct Machine Code for this instruction would be written in
the Code Window in the Code Grid. Then Click MVI and then B and then from the Numbers enter 3 and
then 4. You would find that as soon as your instruction got completed
the Code Grid would have recognized that it was a two byte instruction
and entered the correct Machine Codes at the correct memory locations.
Now lets go for a 3 byte instruction that involves an address. You will see that it would have got
entered as well. Hit HLT now before moving on to next step Click the
STEP. Now click arrow button to execute first step. Grid at right side
shows all the Register States , flag states as well as other details as
the programme gets executed And you would find that the your first
instruction would have got executed. You would find that the contents of
Register B has been copied into Register A. Click on STEP again. you
would find that your next instruction would have got executed. Then
Click STEP again. Your third instruction and then the program halts. You
can always hit RESET if any errors occur. It will set the registers
content to all 20's.Now press RESET to go to initialization state and
now hit RUN. You see the contents of registers change at once. Now hit
File and select save. Now hit File-New. Now hit File-Open and
select the previously saved file. See the contents of the
file.
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