Mnemonic |
Symbolic Operation |
Flags | OP-Code | No. of Bytes |
No. of M Cycles |
No. of T Cycles |
Comments | |||||
| C | Z | P/V | S | N | H | 76 543 210 | ||||||
| CALL nn |
(SP-1) ← PCH (SP-2) ← PCL SP ← SP - 2 PC ← nn |
• | • | • | • | • | • | 11 001 101 ← n → ← n → |
3 | 5 | 17 | |
| CALL cc,nn | If condition cc is false continue, otherwise same as CALL nn |
• | • | • | • | • | • | 11 cc 100 ← n → ← n → |
3 3 |
3 5 |
10 17 |
If cc is false If cc is true cc Condition 000 NZ non zero 001 Z zero 010 NC non carry 011 C carry 100 PO parity odd 101 PE parity even 110 P sign positive 111 M sign negative |
| RET |
PCL ← (SP) PCH ← (SP+1) SP ← SP + 2 |
• | • | • | • | • | • | 11 001 001 | 1 | 3 | 10 | |
| RET cc,nn | If condition cc is false continue, otherwise same as RET |
• | • | • | • | • | • | 11 cc 000 | 1 1 |
1 3 |
5 11 |
If cc is false If cc is true cc same as for CALL cc,nn |
| RETI | Return from interrupt. PCL ← (SP) PCH ← (SP+1) SP ← SP + 2 |
• | • | • | • | • | • |
11 101 101 01 001 101 |
2 | 4 | 14 | Same as RET except detected by interrupting device to re-enable interrupts. |
| RETI | Return from non maskable interrupt. PCL ← (SP) PCH ← (SP+1) SP ← SP + 2 |
• | • | • | • | • | • |
11 101 101 01 000 101 |
2 | 4 | 14 | Same as RET except detected by interrupting device to re-enable interrupts. |
| RST p |
(SP-1) ← PCH (SP-2) ← PCL PCH ← 0 PCL ← P SP ← SP - 2 |
• | • | • | • | • | • | 11 t 111 | 1 | 3 | 11 |
t P 000 00H 001 08H 010 10H 011 18H 100 20H 101 28H 110 30H 111 38H |
| Flag Notation: | • = flag not affected, 0 = flag reset, 1 = flag set, X = flag is unknown, | |
| ↕ = flag is affected according to the result of the operation. | ||