Zilog EZ80F916 - Manual (Page 256)

eZ80
®
CPU
User Manual
UM007715-0415 CPU Instruction Set
247
MLT SP
Multiply Stack Pointer
Operation
SP
[15:0]  SP[15:8] x SP[7:0]
Description
The MLT SP instruction performs an 8-bit by 8-bit multiply operation using the Stack
Pointer (SP). The SP Low byte is multiplied by the SP High byte. The 16-bit product is
written back into the SP register. This operation is an 8-bit by 8-bit operation with a 16-bit
result, regardless of the ADL mode. In ADL mode, or if the .L suffix is employed, the 24-
bit Stack Pointer Long (SPL) is used. In Z80 mode, or if the .S suffix is employed, the 16-
bit Stack Pointer Short (SPS) is used.
Condition Bits Affected
None.
Attributes
Mnemonic Operand ADL Mode Cycle Opcode (hex)
MLT SP
X 6
ED 7C
MLT
.L
SP
0 6
49 ED 7C
MLT
.S
SP
1 6
52 ED 7C