This program simulates an 8085 microprocessor kit. (Technically this is a 8085 instruction set simulator) It has a very good online help with hypertext facility. The package has features like :- 0. A two pass assembler :- Your 8085 programs can be stored as normal ASCII text and submitted to the program, this will be parsed by a two pass assembler. 1. Viewing the 8085 code in mnemonic form 2. Changing the instructions, data, registers and flags on the fly 3. Function key description General Help - F1 set/remove breakpoints - F2 Open new 8085 assembly file and parse it (you must know the file name) - F3 Execute upto cursor position - F4 Goto any position - F5 (or ^G) Start a new session for the current program - F6 trace - F7 step over - F8 Run - F9 Check this ?? - F10 Position yourself at the position where the 'IP' is pointing - F11 Come back to the Instruction box in one key stroke - F12 Context sensitive help - CTRL+F1 Previous Help - ALT+F1 4. Support system calls as described in the intel SDK. Plus 2 extra system calls to communicate with the PC's ports. 5. Excellent Online context sensitive help. Press CTRL+F1 and you get online context sensitive help. Press F1 to get general help 6. Communicate to external devices through the PC's port. External devices can be attached to the PC's ports and can be serviced by your 8085 rst routines. For more details see the help. (Press F1 choose the topic "Miscellaneous" press enter,choose "technical details",then choose "Interrupt details") 6.1 If you find some other features please let me know ;) !!!!