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`CPY_IMM,`CPY_ZP,`CPY_ABS: begin res8 <= y8 - b8; end
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`CPY_IMM,`CPY_ZP,`CPY_ABS: begin res8 <= y8 - b8; end
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`ASL_ZP,`ASL_ZPX,`ASL_ABS,`ASL_ABSX: begin res8 <= {b8,1'b0}; wdat <= {4{b8[6:0],1'b0}}; wadr <= radr; wadr2LSB <= radr2LSB; state <= STORE1; end
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`ASL_ZP,`ASL_ZPX,`ASL_ABS,`ASL_ABSX: begin res8 <= {b8,1'b0}; wdat <= {4{b8[6:0],1'b0}}; wadr <= radr; wadr2LSB <= radr2LSB; state <= STORE1; end
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`ROL_ZP,`ROL_ZPX,`ROL_ABS,`ROL_ABSX: begin res8 <= {b8,cf}; wdat <= {4{b8[6:0],cf}}; wadr <= radr; wadr2LSB <= radr2LSB; state <= STORE1; end
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`ROL_ZP,`ROL_ZPX,`ROL_ABS,`ROL_ABSX: begin res8 <= {b8,cf}; wdat <= {4{b8[6:0],cf}}; wadr <= radr; wadr2LSB <= radr2LSB; state <= STORE1; end
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`LSR_ZP,`LSR_ZPX,`LSR_ABS,`LSR_ABSX: begin res8 <= {b8[0],1'b0,b8[7:1]}; wdat <= {4{1'b0,b8[7:1]}}; wadr <= radr; wadr2LSB <= radr2LSB; state <= STORE1; end
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`LSR_ZP,`LSR_ZPX,`LSR_ABS,`LSR_ABSX: begin res8 <= {b8[0],1'b0,b8[7:1]}; wdat <= {4{1'b0,b8[7:1]}}; wadr <= radr; wadr2LSB <= radr2LSB; state <= STORE1; end
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`ROR_ZP,`ROR_ZPX,`ROR_ABS,`ROR_ABSX: begin res8 <= {b8[0],cf,b8[7:1]}; wdat <= {4{cf,b8[7:1]}}; wadr <= radr; wadr2LSB <= radr2LSB; state <= STORE1; end
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`ROR_ZP,`ROR_ZPX,`ROR_ABS,`ROR_ABSX: begin res8 <= {b8[0],cf,b8[7:1]}; wdat <= {4{cf,b8[7:1]}}; wadr <= radr; wadr2LSB <= radr2LSB; state <= STORE1; end
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`INC_ZP,`INC_ZPX,`INC_ABS,`INC_ABSX: begin res8 <= b8 + 1; wdat <= {4{b8+8'd1}}; wadr <= radr; wadr2LSB <= radr2LSB; state <= STORE1; end
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`INC_ZP,`INC_ZPX,`INC_ABS,`INC_ABSX: begin res8 <= b8 + 8'd1; wdat <= {4{b8+8'd1}}; wadr <= radr; wadr2LSB <= radr2LSB; state <= STORE1; end
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`DEC_ZP,`DEC_ZPX,`DEC_ABS,`DEC_ABSX: begin res8 <= b8 - 1; wdat <= {4{b8-8'd1}}; wadr <= radr; wadr2LSB <= radr2LSB; state <= STORE1; end
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`DEC_ZP,`DEC_ZPX,`DEC_ABS,`DEC_ABSX: begin res8 <= b8 - 8'd1; wdat <= {4{b8-8'd1}}; wadr <= radr; wadr2LSB <= radr2LSB; state <= STORE1; end
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endcase
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endcase
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end
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end
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else begin
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else begin
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case(ir[7:0])
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case(ir[7:0])
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/* The following handled in the DECODE stage which reduces the CPI at a cost of clock frequency.
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/* The following handled in the DECODE stage which reduces the CPI at a cost of clock frequency.
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