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BizHawk/BizHawk.Emulation.Cores/CPUs/Z80A/Tables_Indirect.cs

521 lines
11 KiB
C#
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namespace BizHawk.Emulation.Cores.Components.Z80A
{
public partial class Z80A
{
private void INT_OP_IND(ushort operation, ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD, ALU, src_l, src_h,
IDLE,
operation, ALU,
WAIT,
WR, src_l, src_h, ALU);
PopulateBUSRQ(0, src_h, 0, 0, src_h, src_h, 0, 0);
PopulateMEMRQ(0, src_h, 0, 0, 0, src_h, 0, 0);
IRQS = 8;
}
private void BIT_OP_IND(ushort operation, ushort bit, ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD, ALU, src_l, src_h,
operation, bit, ALU,
IDLE,
WAIT,
WR, src_l, src_h, ALU);
PopulateBUSRQ(0, src_h, 0, 0, src_h, src_h, 0, 0);
PopulateMEMRQ(0, src_h, 0, 0, 0, src_h, 0, 0);
IRQS = 8;
}
// Note that this operation uses I_BIT, same as indexed BIT.
// This is where the strange behaviour in Flag bits 3 and 5 come from.
// normally WZ contain I* + n when doing I_BIT ops, but here we use that code path
// even though WZ is not assigned to, letting it's value from other operations show through
private void BIT_TE_IND(ushort operation, ushort bit, ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD, ALU, src_l, src_h,
I_BIT, bit, ALU);
PopulateBUSRQ(0, src_h, 0, 0, src_h);
PopulateMEMRQ(0, src_h, 0, 0, 0);
IRQS = 5;
}
private void REG_OP_IND_INC(ushort operation, ushort dest, ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD_OP, 1, ALU, src_l, src_h, operation, dest, ALU);
PopulateBUSRQ(0, src_h, 0, 0);
PopulateMEMRQ(0, src_h, 0, 0);
IRQS = 4;
}
private void REG_OP_IND(ushort operation, ushort dest, ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
TR16, Z, W, src_l, src_h,
WAIT,
RD_OP, 1, ALU, Z, W, operation, dest, ALU);
PopulateBUSRQ(0, src_h, 0, 0);
PopulateMEMRQ(0, src_h, 0, 0);
IRQS = 4;
}
// different because HL doesn't effect WZ
private void REG_OP_IND_HL(ushort operation, ushort dest)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD_OP, 0, ALU, L, H, operation, dest, ALU);
PopulateBUSRQ(0, H, 0, 0);
PopulateMEMRQ(0, H, 0, 0);
IRQS = 4;
}
private void LD_16_IND_nn(ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD_INC, Z, PCl, PCh,
IDLE,
WAIT,
RD_INC, W, PCl, PCh,
IDLE,
WAIT,
WR_INC, Z, W, src_l,
IDLE,
WAIT,
WR, Z, W, src_h);
PopulateBUSRQ(0, PCh, 0, 0, PCh, 0, 0, W, 0, 0, W, 0, 0);
PopulateMEMRQ(0, PCh, 0, 0, PCh, 0, 0, W, 0, 0, W, 0, 0);
IRQS = 13;
}
private void LD_IND_16_nn(ushort dest_l, ushort dest_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD_INC, Z, PCl, PCh,
IDLE,
WAIT,
RD_INC, W, PCl, PCh,
IDLE,
WAIT,
RD_INC, dest_l, Z, W,
IDLE,
WAIT,
RD, dest_h, Z, W);
PopulateBUSRQ(0, PCh, 0, 0, PCh, 0, 0, W, 0, 0, W, 0, 0);
PopulateMEMRQ(0, PCh, 0, 0, PCh, 0, 0, W, 0, 0, W, 0, 0);
IRQS = 13;
}
private void LD_8_IND_nn(ushort src)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD_INC, Z, PCl, PCh,
IDLE,
WAIT,
RD_INC, W, PCl, PCh,
IDLE,
WAIT,
WR_INC_WA, Z, W, src);
PopulateBUSRQ(0, PCh, 0, 0, PCh, 0, 0, W, 0, 0);
PopulateMEMRQ(0, PCh, 0, 0, PCh, 0, 0, W, 0, 0);
IRQS = 10;
}
private void LD_IND_8_nn(ushort dest)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD_INC, Z, PCl, PCh,
IDLE,
WAIT,
RD_INC, W, PCl, PCh,
IDLE,
WAIT,
RD_INC, dest, Z, W);
PopulateBUSRQ(0, PCh, 0, 0, PCh, 0, 0, W, 0, 0);
PopulateMEMRQ(0, PCh, 0, 0, PCh, 0, 0, W, 0, 0);
IRQS = 10;
}
private void LD_8_IND(ushort dest_l, ushort dest_h, ushort src)
{
PopulateCURINSTR
(IDLE,
TR16, Z, W, dest_l, dest_h,
WAIT,
WR_INC_WA, Z, W, src);
PopulateBUSRQ(0, dest_h, 0, 0);
PopulateMEMRQ(0, dest_h, 0, 0);
IRQS = 4;
}
// seperate HL needed since it doesn't effect the WZ pair
private void LD_8_IND_HL(ushort src)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
WR, L, H, src);
PopulateBUSRQ(0, H, 0, 0);
PopulateMEMRQ(0, H, 0, 0);
IRQS = 4;
}
private void LD_8_IND_IND(ushort dest_l, ushort dest_h, ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD_INC, ALU, src_l, src_h,
IDLE,
WAIT,
WR, dest_l, dest_h, ALU);
PopulateBUSRQ(0, src_h, 0, 0, dest_h, 0, 0);
PopulateMEMRQ(0, src_h, 0, 0, dest_h, 0, 0);
IRQS = 7;
}
private void LD_IND_8_INC(ushort dest, ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD_INC, dest, src_l, src_h);
PopulateBUSRQ(0, src_h, 0, 0);
PopulateMEMRQ(0, src_h, 0, 0);
IRQS = 4;
}
private void LD_IND_16(ushort dest_l, ushort dest_h, ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD_INC, dest_l, src_l, src_h,
IDLE,
WAIT,
RD_INC, dest_h, src_l, src_h);
PopulateBUSRQ(0, src_h, 0, 0, src_h, 0, 0);
PopulateMEMRQ(0, src_h, 0, 0, src_h, 0, 0);
IRQS = 7;
}
private void INC_8_IND(ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD, ALU, src_l, src_h,
INC8, ALU,
IDLE,
WAIT,
WR, src_l, src_h, ALU);
PopulateBUSRQ(0, src_h, 0, 0, src_h, src_h, 0, 0);
PopulateMEMRQ(0, src_h, 0, 0, 0, src_h, 0, 0);
IRQS = 8;
}
private void DEC_8_IND(ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD, ALU, src_l, src_h,
DEC8, ALU,
IDLE,
WAIT,
WR, src_l, src_h, ALU);
PopulateBUSRQ(0, src_h, 0, 0, src_h, src_h, 0, 0);
PopulateMEMRQ(0, src_h, 0, 0, 0, src_h, 0, 0);
IRQS = 8;
}
// NOTE: WZ implied for the wollowing 3 functions
private void I_INT_OP(ushort operation, ushort dest)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD, ALU, Z, W,
operation, ALU,
TR, dest, ALU,
WAIT,
WR, Z, W, ALU);
PopulateBUSRQ(0, W, 0, 0, W, W, 0, 0);
PopulateMEMRQ(0, W, 0, 0, 0, W, 0, 0);
IRQS = 8;
}
private void I_BIT_OP(ushort operation, ushort bit, ushort dest)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD, ALU, Z, W,
operation, bit, ALU,
TR, dest, ALU,
WAIT,
WR, Z, W, ALU);
PopulateBUSRQ(0, W, 0, 0, W, W, 0, 0);
PopulateMEMRQ(0, W, 0, 0, 0, W, 0, 0);
IRQS = 8;
}
private void I_BIT_TE(ushort bit)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD, ALU, Z, W,
I_BIT, bit, ALU);
PopulateBUSRQ(0, W, 0, 0, W);
PopulateMEMRQ(0, W, 0, 0, 0);
IRQS = 5;
}
private void I_OP_n(ushort operation, ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD, ALU, PCl, PCh,
IDLE,
IDLE,
TR16, Z, W, src_l, src_h,
ADDS, Z, W, ALU, ZERO,
IDLE,
INC16, PCl, PCh,
WAIT,
RD, ALU, Z, W,
operation, ALU,
IDLE,
WAIT,
WR, Z, W, ALU);
PopulateBUSRQ(0, PCh, 0, 0, PCh, PCh, PCh, PCh, PCh, W, 0, 0, W, W, 0, 0);
PopulateMEMRQ(0, PCh, 0, 0, 0, 0, 0, 0, 0, W, 0, 0, 0, W, 0, 0);
IRQS = 16;
}
private void I_OP_n_n(ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
TR16, Z, W, src_l, src_h,
WAIT,
RD_INC, ALU, PCl, PCh,
ADDS, Z, W, ALU, ZERO,
WAIT,
RD, ALU, PCl, PCh,
IDLE,
IDLE,
INC16, PCl, PCh,
WAIT,
WR, Z, W, ALU);
PopulateBUSRQ(0, PCh, 0, 0, PCh, 0, 0, PCh, PCh, W, 0, 0);
PopulateMEMRQ(0, PCh, 0, 0, PCh, 0, 0, 0, 0, W, 0, 0);
IRQS = 12;
}
private void I_REG_OP_IND_n(ushort operation, ushort dest, ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD, ALU, PCl, PCh,
IDLE,
TR16, Z, W, src_l, src_h,
IDLE,
ADDS, Z, W, ALU, ZERO,
IDLE,
INC16, PCl, PCh,
WAIT,
RD_OP, 0, ALU, Z, W, operation, dest, ALU);
PopulateBUSRQ(0, PCh, 0, 0, PCh, PCh, PCh, PCh, PCh, W, 0, 0);
PopulateMEMRQ(0, PCh, 0, 0, 0, 0, 0, 0, 0, W, 0, 0);
IRQS = 12;
}
private void I_LD_8_IND_n(ushort dest_l, ushort dest_h, ushort src)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD, ALU, PCl, PCh,
IDLE,
IDLE,
TR16, Z, W, dest_l, dest_h,
ADDS, Z, W, ALU, ZERO,
IDLE,
INC16, PCl, PCh,
WAIT,
WR, Z, W, src);
PopulateBUSRQ(0, PCh, 0, 0, PCh, PCh, PCh, PCh, PCh, Z, 0, 0);
PopulateMEMRQ(0, PCh, 0, 0, 0, 0, 0, 0, 0, Z, 0, 0);
IRQS = 12;
}
private void LD_OP_R(ushort operation, ushort repeat_instr)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD, ALU, L, H,
operation, L, H,
WAIT,
WR, E, D, ALU,
IDLE,
SET_FL_LD_R, 0, operation, repeat_instr);
PopulateBUSRQ(0, H, 0, 0, D, 0, 0, D, D);
PopulateMEMRQ(0, H, 0, 0, D, 0, 0, 0, 0);
IRQS = 9;
}
private void CP_OP_R(ushort operation, ushort repeat_instr)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD, ALU, L, H,
IDLE,
DEC16, C, B,
operation, Z, W,
IDLE,
SET_FL_CP_R, 1, operation, repeat_instr);
PopulateBUSRQ(0, H, 0, 0, H, H, H, H, H);
PopulateMEMRQ(0, H, 0, 0, 0, 0, 0, 0, 0);
IRQS = 9;
}
private void IN_OP_R(ushort operation, ushort repeat_instr)
{
PopulateCURINSTR
(IDLE,
IDLE,
IDLE,
WAIT,
WAIT,
IN, ALU, C, B,
IDLE,
WAIT,
REP_OP_I, L, H, ALU, operation, 2, operation, repeat_instr);
PopulateBUSRQ(0, I, BIO1, BIO2, BIO3, BIO4, H, 0, 0);
PopulateMEMRQ(0, 0, BIO1, BIO2, BIO3, BIO4, H, 0, 0);
IRQS = 9;
}
private void OUT_OP_R(ushort operation, ushort repeat_instr)
{
PopulateCURINSTR
(IDLE,
IDLE,
IDLE,
WAIT,
RD, ALU, L, H,
IDLE,
WAIT,
WAIT,
REP_OP_O, C, B, ALU, operation, 3, operation, repeat_instr);
PopulateBUSRQ(0, I, H, 0, 0, BIO1, BIO2, BIO3, BIO4);
PopulateMEMRQ(0, 0, H, 0, 0, BIO1, BIO2, BIO3, BIO4);
IRQS = 9;
}
// this is an indirect change of a a 16 bit register with memory
private void EXCH_16_IND_(ushort dest_l, ushort dest_h, ushort src_l, ushort src_h)
{
PopulateCURINSTR
(IDLE,
IDLE,
WAIT,
RD_INC, Z, dest_l, dest_h,
IDLE,
WAIT,
RD, W, dest_l, dest_h,
IDLE,
IDLE,
WAIT,
WR_DEC, dest_l, dest_h, src_h,
IDLE,
WAIT,
WR, dest_l, dest_h, src_l,
IDLE,
TR16, src_l, src_h, Z, W);
PopulateBUSRQ(0, dest_h, 0, 0, dest_h, 0, 0, dest_h, dest_h, 0, 0, dest_h, 0, 0, dest_h, dest_h);
PopulateMEMRQ(0, dest_h, 0, 0, dest_h, 0, 0, 0, dest_h, 0, 0, dest_h, 0, 0, 0, 0);
IRQS = 16;
}
}
}
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