HP 3000 Manuals HP 3000 Manuals
Binary Numbers
The binary numbers used as parameters to HPPACCVBD and HPPACCVDB have the
following characteristics.
* The number is stored in twos-complement format.
* The length is a multiple of 16 bits.
* The length may be up to 96 bits.
* In storage, the high-order bit must occupy bit 0 or bit 15 of a
32-bit word. In other words, the number must be aligned on an
even-byte boundary.
* The storage address is the address of the byte that contains the
high-order bit.
NOTE For compatibility with the HP 3000 Series V instruction set, the
length of a binary number is given in terms of 16-bit elements,
sometimes referred to as "words." To avoid confusion with the
32-bit words of the Series 900 computer systems, the term "16-bit
word" is used in this chapter when referring to the 16-bit elements
of a binary number.