User guide

Chapter 20

Math Instructions

20–13

Using Arithmetic Status Bits

C always reset

V set if the BCD result is larger than 9999. Overflow results in a minor

error.

Z set if the destination value is zero

S set if the source word is negative; otherwise reset

Math Register (When Used)

Contains the 5–digit BCD result of the conversion. This result is valid at

overflow.

Example 1 (SLC 5/02 Processors Only)

The integer value 9760 stored at N7:3 is converted to BCD and the BCD

equivalent is stored in N10:0. The maximum BCD value possible is 9999.

Destination is displayed as

–26784, decimal

(equivalent to 9760 BCD).

9760

N7:3 Decimal

0010 0110 0010 0000

N10:0 4–digit BCD 1001 0111 0110 0000

F1 F2 F3 F4 F5

ZOOM on TOD –(TOD)– 2.3.0.0.2

NAME: TO BCD

SOURCE: N7:3 9760

DEST: N10:0 –26784

EDT_DAT

9760