ASL (thing)

1. American sign language.

2. See a/s/l.

3. A 6502 instruction that shifts the bits in a value in A or in memory one position to the left, setting the least significant bit to 0 and moving the most significant bit into carry. It could stand for "arithmetic shift left" or "A shift left".

• Function: N <<= 1
• Updates flags: S . . . . . Z C
• Opcode numbers:

  dp    $06
  impl  $0A  ; works on value in A
  abs   $0E
  d,x   $16
  a,x   $1E
  

Similar: LSR | ROL | ROR
See also: 6502 instructions | 6502 addressing modes