mirror of
https://github.com/transistorfet/moa.git
synced 2024-06-24 05:29:28 +00:00
162 lines
3.5 KiB
Rust
162 lines
3.5 KiB
Rust
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use crate::system::System;
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use crate::devices::Address;
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use crate::memory::BusPort;
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use super::decode::Z80Decoder;
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//use super::debugger::M68kDebugger;
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#[allow(dead_code)]
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#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord)]
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pub enum Z80Type {
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Z80,
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}
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#[derive(Copy, Clone, Debug, PartialEq)]
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pub enum Status {
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Init,
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Running,
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Halted,
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}
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#[repr(u8)]
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#[allow(dead_code)]
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#[derive(Copy, Clone, Debug, PartialEq)]
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pub enum Flags {
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Carry = 0x0001,
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Overflow = 0x0002,
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Zero = 0x0004,
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Negative = 0x0008,
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Extend = 0x0010,
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}
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/*
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#[repr(u8)]
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#[allow(dead_code)]
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#[derive(Copy, Clone, Debug, PartialEq)]
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pub enum Exceptions {
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BusError = 2,
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AddressError = 3,
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IllegalInstruction = 4,
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ZeroDivide = 5,
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ChkInstruction = 6,
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TrapvInstruction = 7,
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PrivilegeViolation = 8,
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}
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#[repr(u8)]
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#[derive(Copy, Clone, Debug, PartialEq)]
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pub enum InterruptPriority {
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NoInterrupt = 0,
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Level1 = 1,
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Level2 = 2,
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Level3 = 3,
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Level4 = 4,
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Level5 = 5,
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Level6 = 6,
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Level7 = 7,
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}
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impl InterruptPriority {
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pub fn from_u8(priority: u8) -> InterruptPriority {
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match priority {
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0 => InterruptPriority::NoInterrupt,
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1 => InterruptPriority::Level1,
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2 => InterruptPriority::Level2,
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3 => InterruptPriority::Level3,
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4 => InterruptPriority::Level4,
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5 => InterruptPriority::Level5,
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6 => InterruptPriority::Level6,
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_ => InterruptPriority::Level7,
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}
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}
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}
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*/
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#[derive(Clone, Debug, PartialEq)]
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pub struct Z80State {
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pub status: Status,
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pub pc: u16,
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pub sp: u16,
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pub ix: u16,
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pub iy: u16,
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pub reg: [u8; 8],
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pub alt_reg: [u8; 8],
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pub i: u8,
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pub r: u8,
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}
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impl Z80State {
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pub fn new() -> Self {
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Self {
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status: Status::Init,
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pc: 0,
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sp: 0,
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ix: 0,
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iy: 0,
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reg: [0; 8],
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alt_reg: [0; 8],
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i: 0,
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r: 0,
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}
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}
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}
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pub struct Z80 {
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pub cputype: Z80Type,
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pub frequency: u32,
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pub state: Z80State,
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pub decoder: Z80Decoder,
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//pub debugger: M68kDebugger,
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pub port: BusPort,
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}
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impl Z80 {
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pub fn new(cputype: Z80Type, frequency: u32, port: BusPort) -> Self {
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Self {
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cputype,
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frequency,
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state: Z80State::new(),
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decoder: Z80Decoder::new(),
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//debugger: M68kDebugger::new(),
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port: port,
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}
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}
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#[allow(dead_code)]
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pub fn reset(&mut self) {
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self.state = Z80State::new();
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//self.decoder = M68kDecoder::new(self.cputype, 0);
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//self.debugger = M68kDebugger::new();
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}
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/*
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pub fn dump_state(&mut self, system: &System) {
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println!("Status: {:?}", self.state.status);
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println!("PC: {:#010x}", self.state.pc);
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println!("SR: {:#06x}", self.state.sr);
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for i in 0..7 {
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println!("D{}: {:#010x} A{}: {:#010x}", i, self.state.d_reg[i as usize], i, self.state.a_reg[i as usize]);
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}
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println!("D7: {:#010x}", self.state.d_reg[7]);
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println!("MSP: {:#010x}", self.state.msp);
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println!("USP: {:#010x}", self.state.usp);
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println!("Current Instruction: {:#010x} {:?}", self.decoder.start, self.decoder.instruction);
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println!("");
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self.port.dump_memory(self.state.msp as Address, 0x40);
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println!("");
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}
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*/
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}
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