Hardware simulator and assembler for an educational computer

In this study, a hardware simulator and an assembler is realized for an educational computer called BB3 (Bizim Bilgisayar 3). A hardware simulator differs from the other simulators in that, simulating the operation of instructions is not the only purpose, but the simulation is performed at the lowest digital circuit design level, Thus, a correspondence can be established between the simulator statements and the computer?s digital circuits. Due to this correspondence, every modification that is thought can be readily reflected to the simulator and tested. A keyboard and a screen (belonging to BB3) to represent the I/O units of BB3 is placed on the simulator?s screen, together with its memory and registers. Just as the programed I/O, also interrupt driven I/O is realized and successfully tested. In parallel to the flexibility of the simulator the assembler is also designed in a way to enable adding new instruction symbols or replacing the old ones. The software is written in Delphi 7.0 programming language under the Windows operating system.