Shift Memory or Accumulator Left (ASL)
- Function
- Shift the contents of the location specified by the operand left one bit. That is, bit one takes on the value originally found in bit zero, bit two takes the value originally in bit one, and so on; bit 7 is transferred into the carry flag; bit 0 is cleared. The arithmetic result of the operation is an unsigned multiplication by two.
- Addressing Modes & Opcodes
-
-
| Addressing Mode
| Syntax
| Opcode
| # of bytes
| # of cycles
|
| Zero Page
| ASL ZZ
| 06 ZZ
| 2
| 6
|
| Zero Page, X
| ASL ZZ, X
| 16 ZZ
| 2
| 6
|
| Absolute
| ASL hhll
| 0E ll hh
| 3
| 7
|
| Absolute, X
| ASL hhll, X
| 1E ll hh
| 3
| 7
|
| Accumulator
| ASL A
| 0A
| 1
| 2
|
-
- Flags Affected
-
-
| N
| V
| T
| B
| D
| I
| Z
| C
|
| N
| -
| 0
| -
| -
| -
| Z
| C
|
-