ez80

This is an extension of iz80 to support the eZ80 CPU.

It passes all the tests of the ZEXALL suite, but the eZ80 mode is more experimental. It is used by the Agon Light Emulator, via the Agon CPU Emulator, which emulates the CPU and CPU-connected peripherals of the Agon Light.

To run the ZEXALL test suite for Zilog Z80:

cargo test --release -- --nocapture --ignored --test zexall

To run the EX8080 test suite for Intel 8080:

cargo test --release -- --nocapture --ignored --test ex8080

To run Tiny Basic (from cpuville):

cargo run --bin cpuville

Usage

See cpuville.rs or the CP/M 2.2 emulator iz-cpm for more usage examples.

To run this example, execute: cargo run --bin simplest

use iz80::*;

fn main() {
    // Prepare the device
    let mut machine = PlainMachine::new();
    let mut cpu = Cpu::new(); // Or Cpu::new_8080()
    cpu.set_trace(true);

    // Load program inline or from a file with:
    //      let code = include_bytes!("XXXX.rom");
    let code = [0x3c, 0xc3, 0x00, 0x00]; // INC A, JP $0000
    let size = code.len();
    for i in 0..size {
        machine.poke(0x0000 + i as u16, code[i]);
    }

    // Run emulation
    cpu.registers().set_pc(0x0000);
    loop {
        cpu.execute_instruction(&mut machine);

        // Examine machine state to update the hosting device as needed.
        if cpu.registers().a() == 0x10 {
            // Let's stop
            break;
        }
    }
}

Links

• The ZEXALL test suite for Z80 was taken from https://github.com/anotherlin/z80emu
• The EX8080 test suite for Intel 8080 was taken from https://github.com/begoon/i8080-core

Test results:

Diagnostics II by Supersoft Associates for Intel 8080

DIAGNOSTICS II V1.2 - CPU TEST
COPYRIGHT (C) 1981 - SUPERSOFT ASSOCIATES

ABCDEFGHIJKLMNOPQRSTUVWXYZ
CPU IS 8080/8085
BEGIN TIMING TEST
END TIMING TEST
CPU TESTS OK

Diagnostics II by Supersoft Associates for Z80

DIAGNOSTICS II V1.2 - CPU TEST
COPYRIGHT (C) 1981 - SUPERSOFT ASSOCIATES

ABCDEFGHIJKLMNOPQRSTUVWXYZ
CPU IS Z80
BEGIN TIMING TEST
END TIMING TEST
CPU TESTS OK

Z80 instruction exerciser ZEXALL

Z80 instruction exerciser
<adc,sbc> hl,<bc,de,hl,sp>....  OK
add hl,<bc,de,hl,sp>..........  OK
add ix,<bc,de,ix,sp>..........  OK
add iy,<bc,de,iy,sp>..........  OK
aluop a,nn....................  OK
aluop a,<b,c,d,e,h,l,(hl),a>..  OK
aluop a,<ixh,ixl,iyh,iyl>.....  OK
aluop a,(<ix,iy>+1)...........  OK
bit n,(<ix,iy>+1).............  OK
bit n,<b,c,d,e,h,l,(hl),a>....  OK
cpd<r>........................  OK
cpi<r>........................  OK
<daa,cpl,scf,ccf>.............  OK
<inc,dec> a...................  OK
<inc,dec> b...................  OK
<inc,dec> bc..................  OK
<inc,dec> c...................  OK
<inc,dec> d...................  OK
<inc,dec> de..................  OK
<inc,dec> e...................  OK
<inc,dec> h...................  OK
<inc,dec> hl..................  OK
<inc,dec> ix..................  OK
<inc,dec> iy..................  OK
<inc,dec> l...................  OK
<inc,dec> (hl)................  OK
<inc,dec> sp..................  OK
<inc,dec> (<ix,iy>+1).........  OK
<inc,dec> ixh.................  OK
<inc,dec> ixl.................  OK
<inc,dec> iyh.................  OK
<inc,dec> iyl.................  OK
ld <bc,de>,(nnnn).............  OK
ld hl,(nnnn)..................  OK
ld sp,(nnnn)..................  OK
ld <ix,iy>,(nnnn).............  OK
ld (nnnn),<bc,de>.............  OK
ld (nnnn),hl..................  OK
ld (nnnn),sp..................  OK
ld (nnnn),<ix,iy>.............  OK
ld <bc,de,hl,sp>,nnnn.........  OK
ld <ix,iy>,nnnn...............  OK
ld a,<(bc),(de)>..............  OK
ld <b,c,d,e,h,l,(hl),a>,nn....  OK
ld (<ix,iy>+1),nn.............  OK
ld <b,c,d,e>,(<ix,iy>+1)......  OK
ld <h,l>,(<ix,iy>+1)..........  OK
ld a,(<ix,iy>+1)..............  OK
ld <ixh,ixl,iyh,iyl>,nn.......  OK
ld <bcdehla>,<bcdehla>........  OK
ld <bcdexya>,<bcdexya>........  OK
ld a,(nnnn) / ld (nnnn),a.....  OK
ldd<r> (1)....................  OK
ldd<r> (2)....................  OK
ldi<r> (1)....................  OK
ldi<r> (2)....................  OK
neg...........................  OK
<rrd,rld>.....................  OK
<rlca,rrca,rla,rra>...........  OK
shf/rot (<ix,iy>+1)...........  OK
shf/rot <b,c,d,e,h,l,(hl),a>..  OK
<set,res> n,<bcdehl(hl)a>.....  OK
<set,res> n,(<ix,iy>+1).......  OK
ld (<ix,iy>+1),<b,c,d,e>......  OK
ld (<ix,iy>+1),<h,l>..........  OK
ld (<ix,iy>+1),a..............  OK
ld (<bc,de>),a................  OK
Tests complete

8080 instruction exerciser

8080 instruction exerciser (KR580VM80A CPU)
dad <b,d,h,sp>................  OK
aluop nn......................  OK
aluop <b,c,d,e,h,l,m,a>.......  OK
<daa,cma,stc,cmc>.............  OK
<inr,dcr> a...................  OK
<inr,dcr> b...................  OK
<inx,dcx> b...................  OK
<inr,dcr> c...................  OK
<inr,dcr> d...................  OK
<inx,dcx> d...................  OK
<inr,dcr> e...................  OK
<inr,dcr> h...................  OK
<inx,dcx> h...................  OK
<inr,dcr> l...................  OK
<inr,dcr> m...................  OK
<inx,dcx> sp..................  OK
lhld nnnn.....................  OK
shld nnnn.....................  OK
lxi <b,d,h,sp>,nnnn...........  OK
ldax <b,d>....................  OK
mvi <b,c,d,e,h,l,m,a>,nn......  OK
mov <bcdehla>,<bcdehla>.......  OK
sta nnnn / lda nnnn...........  OK
<rlc,rrc,ral,rar>.............  OK
stax <b,d>....................  OK
Tests complete

Pre-commit tests

Note that some of the Zexall tests takes very long and is disabled for continuouos integrations. To run it, execute:

cargo test --release -- --nocapture --ignored --test zexall