Summary : This project is about implementation of hardware and operating system.
The goal is to implement hardware working and resource management of operating system in Java
The goal is to implement hardware working and resource management of operating system in Java
Instruction size is 4byte.
Following is field table.
| Field Name | Bit | Description |
|---|---|---|
| Addressing mode | 1 | Indicates whether the operand is a constant or an address |
| Opcode | 5 | Indicates Opcode |
| Register | 2 | Indicates general purpose register (AX, BX, CX, DX) |
| Operand 0 | 12 | Indicates first operand |
| Operand 1 | 12 | Indicates second operand |
And following is Opcode table.
Segment designation is done through Operand 0, with 0 being considered the data segment, 1 being the stack segment, and
2 being the heap segment.
| Name | Mnemonic | Description |
|---|---|---|
| Halt | HLT | Create halt interrupt |
| Load | LDA | Load value into AX |
| Store | STO | Store AX into memory |
| Add | ADD | Add value into AX and store AX |
| Subtract | SUB | Subtract value from AX and store AX |
| Multiply | MUL | Multiply value with AX and store AX |
| Divide | DIV | Divide value with AX and store AX |
| Jump | JMP | Store value into PC |
| Jump zero | JPZ | If zero field is true, execute Jump |
| Jump negative | JPN | If negative field is true, execute Jump |
| Interrupt | INT | Invert interrupt field |
| Push | PSH | Push value into stack and increase SP |
| Pop | POP | decrease SP |
| Allocate | ALC | Allocate heap memory and store base into AX |
| Free | FRE | Free heap memory |
- The left panel is a memory dump of the FAT.
- The center panel is a memory dump of the data section.
- The right panel is a panel where you can open, update, and close the file.
The Memory Dump panel automatically shows you where physical values in the disk have changed when they do.
- The status bar at the top is the percentage of memory currently in use.
- The top panel is the I/O log for main memory.
- The bottom panel is the alloc/free log for main memory.
- The left panel is the CPU's register values.
- The center panel is the running process's PCB, allocated pages, and allocated heap memory.
- The right panel is a list of processes loaded on main memory.