git.joshuawise.com / fpgaboy.git / blame_incremental
| Commit | Line | Data |
|---|---|---|
| 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 |