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What is BCD?

Updated: 10/3/2023
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12y ago

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Binary Coded Decimal. It's a modified form of binary.

10 8 4 2 1. When the count gets to 10 the tens column has a 1 in it.

20 10 8 4 2 1. The tens are also arranged in a binary format. It makes the format more compact.

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Why is BCD used in computers?

BCD is used for binary output on devices that only display decimal numbers.


Applications of bcd to binary code cnvertor?

Many non-integral values, such as decimal 0.2, have an infinite place-value representation in binary (.001100110011...) but have a finite place-value in binary-coded decimal (0.0010)[bcd]. Consequently a system based on binary-coded decimal representations of decimal fractions avoids errors representing and calculating such values. Rounding at a decimal digit boundary is simpler in BCD. Addition and subtraction in decimal does not require rounding.


How many 7490 ICs are to be cascaded to count up to 999?

Likewise, if we wanted to count from 0 up to 999 (0000 0000 0000 to 1001 1001 1001), then three cascaded decade counters are required. In fact, multiple decade counters can be constructed simply by cascading together individual BCD counter circuits, one for each decade as shown. 2-digit BCD Counter from 00 to 99


Why was bcd code extended to ebcdic code?

The major problem with BCD code is that only 64 (2 to the power 6) different charactor can be represented in it. this is not sufficient for providing decimal numbers (10), lower case letters (26), and large number of other special characters (28+) Rajesh Rajput se.rajesh.rajput@gmail.com ...And EBCDIC was obsoleted by ASCII because EBCDIC did not use continuous coding (all the letters of the alphabet in increasing binary values), and because IBM made it difficult for others to use.


Explain various types of data formats that the 8087 is design to work with?

The 8087 Math CoProcessor can work with two data formats: temporary real and packed decimal. Each data instruction, whether real or decimal, can be up to 80 bits long.