This is a Z80 emulator. It passes all but two zexdoc tests. It implements some (not all yet) undocumented instructions. It handles interrupts and I/O (see the examples directory).
Example for a small loop:
rust
use zilog_z80::cpu::CPU;
let mut c = CPU::new();
c.reg.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 with the load_bin function.
c.bus.write_byte(0x0100, 0x3e); // LD A,0x0F
c.bus.write_byte(0x0101, 0x0F);
c.bus.write_byte(0x0102, 0x3d); // DEC A
c.bus.write_byte(0x0103, 0xc2); // JP NZ,0x0102
c.bus.write_word(0x0104, 0x0102);
c.bus.write_byte(0x0106, 0xc9); // RET
loop {
c.execute();
if c.reg.pc == 0x0000 { break }
}
License: MIT