Make the boot rom talk a bit more, and wait for you to flip a switch. Make the 'progr...
[fpgaboy.git] / insn_bit.v
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decafd62
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1`ifdef EXECUTE
2 `INSN_BIT: begin
3 if ((opcode[2:0] == `INSN_reg_dHL) && (cycle == 0)) begin
4 `EXEC_READ(`_HL)
5 end else if ((opcode[2:0] == `INSN_reg_dHL) && (cycle == 2)) begin
6 `EXEC_NEWCYCLE
7 end else begin
b4f3ac35 8 `EXEC_INC_PC
decafd62
JW
9 case (opcode[2:0])
10 `INSN_reg_A: tmp <= `_A;
11 `INSN_reg_B: tmp <= `_B;
12 `INSN_reg_C: tmp <= `_C;
13 `INSN_reg_D: tmp <= `_D;
14 `INSN_reg_E: tmp <= `_E;
15 `INSN_reg_H: tmp <= `_H;
16 `INSN_reg_L: tmp <= `_L;
17 `INSN_reg_dHL: tmp <= rdata;
18 endcase
19 if (opcode[2:0] != `INSN_reg_dHL) begin
20 `EXEC_NEWCYCLE
21 end
22 end
23 end
24`endif
25
26`ifdef WRITEBACK
27 `INSN_BIT: begin
28 if ((opcode[2:0] != `INSN_reg_dHL) || (cycle == 1))
29 `_F <= {~tmp[opcode[5:3]], 2'b01, `_F[4:0]};
30 end
31`endif
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