2021-10-11 15:53:02 +00:00
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pub enum Register {
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2021-10-11 16:39:13 +00:00
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A(u8), // Accumulator
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F(u8), // Flags
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B(u8),
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2021-10-11 15:53:02 +00:00
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C(u8),
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D(u8),
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E(u8),
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H(u8),
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L(u8),
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2021-10-11 16:39:13 +00:00
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// This registers are just the same as above but combined to get a 16 bits register
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BC(u16),
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DE(u16),
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HL(u16),
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2021-10-11 15:53:02 +00:00
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SP(u16),
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PC(u16),
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}
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pub struct Registers {
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2021-10-11 16:39:13 +00:00
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a: u8,
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f: u8,
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b: u8,
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c: u8,
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d: u8,
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e: u8,
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h: u8,
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l: u8,
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sp: u16,
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pc: u16,
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}
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impl Registers {
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pub fn get(&self, register: Register) -> u16 {
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match register {
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Register::A(_) => self.a as u16,
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Register::B(_) => self.b as u16,
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Register::C(_) => self.c as u16,
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Register::D(_) => self.d as u16,
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Register::E(_) => self.e as u16,
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Register::F(_) => self.f as u16,
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Register::H(_) => self.h as u16,
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Register::L(_) => self.l as u16,
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Register::BC(_) => self.get_bc(),
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Register::DE(_) => self.get_de(),
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Register::HL(_) => self.get_hl(),
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Register::SP(_) => self.sp,
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Register::PC(_) => self.pc,
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}
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}
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pub fn set(&mut self, register: Register) {
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match register {
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Register::A(val) => self.a = val,
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Register::B(val) => self.b = val,
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Register::C(val) => self.c = val,
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Register::D(val) => self.d = val,
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Register::E(val) => self.e = val,
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Register::F(val) => self.f = val,
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Register::H(val) => self.h = val,
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Register::L(val) => self.l = val,
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Register::BC(val) => self.set_bc(val),
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Register::DE(val) => self.set_de(val),
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Register::HL(val) => self.set_hl(val),
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Register::SP(val) => self.sp = val,
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Register::PC(val) => self.pc = val,
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}
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}
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fn get_bc(&self) -> u16 {
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((self.b as u16) << 8) | (self.c as u16)
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}
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fn get_de(&self) -> u16 {
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((self.d as u16) << 8) | (self.e as u16)
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}
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fn get_hl(&self) -> u16 {
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((self.h as u16) << 8) | (self.l as u16)
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}
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fn set_bc(&mut self, val: u16) {
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let bytes = val.to_be_bytes();
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self.b = bytes[0];
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self.c = bytes[1];
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}
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fn set_de(&mut self, val: u16) {
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let bytes = val.to_be_bytes();
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self.d = bytes[0];
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self.e = bytes[1];
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}
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fn set_hl(&mut self, val: u16) {
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let bytes = val.to_be_bytes();
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self.h = bytes[0];
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self.l = bytes[1];
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}
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2021-10-11 15:53:02 +00:00
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}
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pub struct CPU {
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registers: Registers,
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}
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