DR805x Instructions set details
- 57 -
3.27.
MUL
MUL AB
Multiply
MUL AB multiplies the unsigned eight-bit integers in the accumulator
and register B. The low-order byte of the sixteen-bit product is left in the
accumulator, and the high-order byte in B. If the product is greater than
255 (0FF H) the overflow flag is set; otherwise it is cleared. The carry
flag is always cleared.
(PC)
←
(PC) + 1
(A)
←
(A) x (B)
– result’s bits 7..0
(B)
←
(A) x (B)
– result’s bits 15..8
Instruction:
Function:
Description:
Operation:
Bytes:
Cycles:
Encoding:
1
4
1
0
1
0
0
1
0
0
All trademarks mentioned in this document
are trademarks of their respective owners.
http://www.DigitalCoreDesign.com
http://www.dcd.pl
Copyright 1999-2003 DCD – Digital Core Design. All Rights Reserved.
DCD [ DIGITAL CORE DESIGN ]
