Question

Differentiate Packed and Un-Packed BCD values?

Answer 1

Answer:

like koro

Explanation:

hlo

bhai tu dikh bcd kiya hai

Answer 2

Answer:

A byte (unpacked) representation of a decimal digit in the range0 through

9. Unpacked decimal numbers are stored as unsigned byte quantities. One

digit is stored in each byte. The magnitude of the number is determined from

the low-order half-byte; hexadecimal values 0-9 are valid and are

interpreted as decimal numbers. The high-order half-byte must be zero for

multiplication and division; it may contain any value for addition and

subtraction.

Packed BCD:

A byte (packed) representation of two decimal digits, each in the range

0 through 9. One digit is stored in each half-byte. The digit in the

high-order half-byte is the most significant. Values 0-9 are valid in each

half-byte. The range of a packed decimal byte is 0-99.

I did not write all of this. I cut and pasted from the 80386 Intel

Programmer's Reference Manual 1986

I hope that helps you out about packed and unpacked BCDs.

Happy Coding...Frank