Yet another Intel 8080 Emulator. It passes the TST8080, 8080PRE, CPUTEST and 8080EXM tests.
Example for a small loop:
rust
use intel8080::CPU;
let mut c = CPU::new();
c.pc = 0x0100; // sets pc to $100
// Here we create a small machine code program for demo purpose.
// Usually you will rather load an assembled code in memory (see below).
c.bus.write_byte(0x0100, 0x3e); // MVI A,$0F
c.bus.write_byte(0x0101, 0x0F);
c.bus.write_byte(0x0102, 0x3d); // DCR A
c.bus.write_byte(0x0103, 0xc2); // JNZ $0102
c.bus.write_word(0x0104, 0x0102);
c.bus.write_byte(0x0106, 0xc9); // RET
loop {
c.execute();
if c.pc == 0x0000 { break }
}
Debug mode outputs CPU state and disassembled code to an internal string after each execute():
3E 0f MVI A,$0f
PC : 0x0003 SP : 0xff00 S : 0 Z : 0 A : 0 P : 0 C : 0
B : 0x00 C : 0x00 D : 0x00 E : 0x00 H : 0x00 L : 0x00 ...
Includes a "cpmloader" which loads and executes basic CP/M programs:
cargo run --release --example cpmloader -- bin/helloworld.bin
You can also check my Altair 8800 / 88-SIO / teletype emulator.
The provided source code examples can be assembled with Retro Assembler.
License: MIT