core/insn_ldh_ac.v

   1 `define INSN_LDH_AC             9'b0111x0010    // Either LDH A,(C) or LDH (C),A
   2
   3 `ifdef EXECUTE
   4         `INSN_LDH_AC: begin
   5                 case (cycle)
   6                 0:      if (opcode[4])  // LD A,(C)
   7                                 `EXEC_READ(({8'hFF,`_C}))
   8                         else
   9                                 `EXEC_WRITE(({8'hFF,`_C}), `_A)
  10                 1:      begin
  11                                 `EXEC_NEWCYCLE
  12                                 `EXEC_INC_PC
  13                         end
  14                 endcase
  15         end
  16 `endif
  17
  18 `ifdef WRITEBACK
  19         `INSN_LDH_AC: begin
  20                 case (cycle)
  21                 0:      begin /* Type F */ end
  22                 1:      if (opcode[4]) `_A <= rdata;
  23                 endcase
  24         end
  25 `endif
  26