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Joshua Wise's Git repositories - fpgaboy.git/blame_incremental - core/insn_ldx_ahl.v
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| Commit | Line | Data |
|---|
| | 1 | `ifdef EXECUTE |
| | 2 | `INSN_LDx_AHL: begin |
| | 3 | case (cycle) |
| | 4 | 0: if (opcode[3]) // LDx A, (HL) |
| | 5 | `EXEC_READ(`_HL) |
| | 6 | else |
| | 7 | `EXEC_WRITE(`_HL, `_A) |
| | 8 | 1: begin |
| | 9 | `EXEC_NEWCYCLE |
| | 10 | `EXEC_INC_PC |
| | 11 | end |
| | 12 | endcase |
| | 13 | end |
| | 14 | `endif |
| | 15 | |
| | 16 | `ifdef WRITEBACK |
| | 17 | `INSN_LDx_AHL: begin |
| | 18 | case (cycle) |
| | 19 | 0: begin /* Type F */ end |
| | 20 | 1: begin |
| | 21 | if (opcode[3]) |
| | 22 | `_A <= rdata; |
| | 23 | `_HL <= opcode[4] ? // if set, LDD, else LDI |
| | 24 | (`_HL - 1) : |
| | 25 | (`_HL + 1); |
| | 26 | end |
| | 27 | endcase |
| | 28 | end |
| | 29 | `endif |
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