NAME	PACK -- Pack binary coded decimal (68020+)
SYNOPSIS	PACK -(Ax),-(Ay),#<adjustment> PACK Dx,Dy,#<adjustment> Size = (Byte, Long)
FUNCTION	Convert byte-per-digit unpacked BCD to packed two-digit- per-byte BCD. When operand is in a data register, 16 bits adjustment is added to source operand (16 bits). Then, bits 8 to 11 and 0 to 3 are packed and placed in the bits 0 to 7 of destination register. Others bits of this register are not altered. When operand is in memory, there's a research by pre-decrementing of the two bytes placed at given address. The two bytes are linked together, then adjustment is added, and the compacted result is stored at destination's place.
FORMAT	15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 1 0 0 0 Dy/Ay 1 0 1 0 0 R/M Dx/Ax 16 BITS ADJUSTMENT R/M = 0 -> Direct addressing by data register. R/M = 1 -> Addressing by pre-decrementing. Register Dy/Ay specifies destination register. Register Dx/Ax specifies source register. "16 BITS ADJUSTMENT" is an immediate value added to source operand.
RESULT	None.

English version not yet available.