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Commit | Line | Data |
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e7fe9dc2 JW |
1 | `define INSN_LDx_AHL 9'b0001xx010 // LDD/LDI A,(HL) / (HL),A |
2 | ||
3ad960bd JW |
3 | `ifdef EXECUTE |
4 | `INSN_LDx_AHL: begin | |
5 | case (cycle) | |
5c33c5c0 JW |
6 | 0: if (opcode[3]) // LDx A, (HL) |
7 | `EXEC_READ(`_HL) | |
8 | else | |
9 | `EXEC_WRITE(`_HL, `_A) | |
3ad960bd | 10 | 1: begin |
5c33c5c0 JW |
11 | `EXEC_NEWCYCLE |
12 | `EXEC_INC_PC | |
3ad960bd JW |
13 | end |
14 | endcase | |
15 | end | |
16 | `endif | |
17 | ||
18 | `ifdef WRITEBACK | |
19 | `INSN_LDx_AHL: begin | |
20 | case (cycle) | |
21 | 0: begin /* Type F */ end | |
22 | 1: begin | |
23 | if (opcode[3]) | |
5c33c5c0 JW |
24 | `_A <= rdata; |
25 | `_HL <= opcode[4] ? // if set, LDD, else LDI | |
26 | (`_HL - 1) : | |
27 | (`_HL + 1); | |
3ad960bd JW |
28 | end |
29 | endcase | |
30 | end | |
31 | `endif |