This repository contains a simple z80 emulator, which allows loading and executing programs. It was written by Lin Ke-Fong, and lightly modified by myself.
The original source is here:
You should be able to compile via:
make
Once you've compiled the program you can launch your z80 binaries via:
z80emulator path/to/file
The emulator has been modified to allow single character input/output. This is done by executing the IN/OUT instructions.
To output a single character:
LD a, 's'
OUT (1), a
To read a single character:
IN a, (1)
(i.e. In both cases the I/O address is 1).
To test the emulator, and the I/O support you can save the following program to sample.z80:
org 0
in a,(1)
sub a, 32
out (1), a
halt
The intention is that this program will read a single character from STDIN, and converts from lower-case to upper-case, with no error-checking, before outputting the result.
Compile via z80asm, which will generate a.bin:
z80asm ./sample.z80
Now you have the compiled file, a.bin, you can emulate it via:
./z80emulator ./a.bin
Testing "./a.bin"...
a
A
33 cycle(s) emulated.
For a Z80 running at 4.00MHz, that would be 0 second(s) or 0.00 hour(s).
Emulating ./a.bin took a total of 1 second(s).