Now try all assembly level programming without actually buying the hardware
This Emulator works in CLI(command line mode)
Emulator works in 3 phases...
PHASE 1:
when single argument(i.e only executable filename is given)
* Allows user to write an assembly program and then execute it.
* At end display the contents of registers and memory
PHASE 2:
when two parameters are given/passed(executable file+ assembly program file)
* Checks whether addressing is given or not
* Do all task of phase 1
PHASE 3:
when three arguments are given/passed(executable file+assembly proram file+ KEYWORD*) KEYWORD = DEBUG/DEBUGGER/debug/debug....
* Displays debugger menu and perform operation selected
* All tasks of phase 2
INSTRUCTION SET: Load and Store - MOV , MVI , LXI , LDA , STA , LHLD , SHLD , STAX , XCHG Arithmetic - ADD , ADI , SUB , INR , DCR , INX , DCX , DAD , SUI Logical - CMA , CMP Branching - JMP , JC , JNC , JZ , JNZ One Additional command SET is developed to set data into valid memory locations (Eg - SET 2500,0A )
DEBUGGER MENU:
- break or b
line no:- It will set break point on given line number. - run or r :- Run the program until it ends or breakpoint is encountered.
- step or s :- It will run the program one instruction at a time.
- print or p:- It prints the value of register or memory location. for ex p A will print the value of register A. p x2500 will print the value at memory location x2500 if any.
- quit or q:- quits the debugger.
- help:- will show all the commands of debugger
DO LET US KNOW ABOUT CONS OF IT......(BY COMMENTNG)
SO THAT WE CAN FIX IT IN LATER VERSIONS.......