A simple assembler with JAVA graphical interface and my own assembler language. Structure of the processor and syntax of the language based on Z80 architecture. The repo also contains a Hungarian documentation, with the list of the commands and three example assembly code.
You can download a runnable version (JAR file) from here.
- Constant
- Decimal: simple numbers, eg.: 26
- Binary: simple binary numbers with 'b' at the end, eg.: 11010b
- Hexadecimal: simple hexadecimal numbers with 'h' at the end, eg.: 1Ah
- Register
- name of the register. There are eight accessable registers: A, B, C, D, F, H, L.
- Memory
- Reference to a memory block by constant, the constant is inside brackets. The constant is the index of the memory block, eg.: (13)
- Reference to a memory block by value of a register, the name of the register is inside brackets. The value of the register is the index of the memory block, eg.: (C)
- String
- Any string that contains only letters and numbers, exlude the name of commands or registers.
| Cmd | Functionality | number of operands | first operand type | second operand type |
|---|---|---|---|---|
| ADD | Additional to A | 1 | c r | - |
| SUB | Substraction to A | 1 | c r | - |
| INC | Increment A | 0 | - | - |
| DEC | Decrement A | 0 | - | - |
| OR | Bitwise or with A | 1 | c r | - |
| XOR | Bitwise xor with A | 1 | c r | - |
| NOT | Bitwise nor with A | 0 | - | - |
| PUSH | Push value to stack | 1 | c r | - |
| POP | Pop value from stack | 1 | c r | - |
| CMP | Compare, see below | 1 | c r | - |
| JMP | Jump always | 1 | c | - |
| JNZ | Jump, if last bit of F is not zero | 1 | c | - |
| LD | Load value from second to first | 2 | r m | c r m |
| EQ | Define constants | 2 | s | c |
CMP sets the first bit of F to 1, if the operand is equal to accumulate current value, otherwise nothing happens.
The above mentioned three example contains concrete commands.
If you have questions, contact me antal[dooot]janos[dooot]benjamin[aaat]gmail[dooot]com.