insn_ldh_ac.v

   1 `ifdef EXECUTE
   2         `INSN_LDH_AC: begin
   3                 case (cycle)
   4                 0:      begin
   5                                 address <= {8'hFF,registers[`REG_C]};
   6                                 if (opcode[4]) begin    // LD A,(C)
   7                                         rd <= 1;
   8                                 end else begin
   9                                         wr <= 1;
  10                                         wdata <= registers[`REG_A];
  11                                 end
  12                         end
  13                 1:      begin
  14                                 `EXEC_NEWCYCLE;
  15                                 `EXEC_INC_PC;
  16                         end
  17                 endcase
  18         end
  19 `endif
  20
  21 `ifdef WRITEBACK
  22         `INSN_LDH_AC: begin
  23                 case (cycle)
  24                 0:      begin /* Type F */ end
  25                 1:      if (opcode[4])
  26                                 registers[`REG_A] <= rdata;
  27                 endcase
  28         end
  29 `endif
  30