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56 lines
1.6 KiB
56 lines
1.6 KiB
from typing import Optional
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from gbso.cpu.regs import R16_HI, R16_LO, R8, R16
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from gbso.cpu.state import CPUState
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class CPU:
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state: CPUState
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def __init__(self, state: Optional[CPUState] = None) -> None:
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if state is None:
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state = CPUState()
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self.state = state
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def get_reg8(self, r: R8) -> int:
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return self.state.reg8[r]
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def get_reg16(self, rr: R16) -> int:
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if rr == R16.SP:
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return self.state.sp
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return (self.state.reg8[R16_HI[rr]] << 8) | self.state.reg8[R16_LO[rr]]
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def set_reg8(self, r: R8, n: int) -> None:
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self.state.reg8[r] = n & 0xFF
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def set_reg16(self, rr: R16, nn: int) -> None:
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if rr == R16.SP:
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self.state.sp = nn & 0xFFFF
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return
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self.state.reg8[R16_HI[rr]] = (nn >> 8) & 0xFF
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self.state.reg8[R16_LO[rr]] = nn & 0xFF
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def get_mem8(self, nn: int) -> int:
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return self.state.memory[nn & 0xFFFF]
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def get_mem16(self, nn: int) -> int:
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hi = self.state.memory[nn & 0xFFFF]
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lo = self.state.memory[(nn + 1) & 0xFFFF]
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return (hi << 8) | lo
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def set_mem8(self, nn: int, n: int) -> None:
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self.state.memory[nn & 0xFFFF] = n & 0xFF
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def set_mem16(self, nn: int, nn1: int) -> None:
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self.state.memory[nn & 0xFFFF] = (nn1 >> 8) & 0xFF
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self.state.memory[(nn + 1) & 0xFFFF] = nn1 & 0xFF
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@property
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def hl(self) -> int:
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return self.get_mem8(self.get_reg16(R16.HL))
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@hl.setter
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def hl(self, n: int) -> None:
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self.set_mem8(self.get_reg16(R16.HL), n)
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