Control Data 3100 Reference Manual page 172

The computer performs 'division in a similar manner (using binary equivalents):
1110
quotient (14)
divisor 1101 110111001 dividend
1101
10100
1101
1110 partial dividends
1101
11 remainder (3)
However, instead of shifting the divisor right to position it for subtraction from the partial
dividend (shown above), the computer shifts the partial dividend left, accomplishing the
same purpose and permitting the arithmetic to be performed in the A register. The com-
puter counts the number of shifts, which is the number of quotient digits to be obtained;
after the correct number of counts, the routine is terminated.
CONVERSIONS
The procedures that may be used when converting from one number system to another
are power addition, radix arithmetic, and substitution.
TABLE B-1. RECOMMENDED CONVERSION PROCEDURES
(INTEGER AND FRACTIONAL)
Conversion Recommended Method
Binary to Decimal Power Addition
Octal to Decimal Power Addition
Decimal to Binary
Radix Arithmetic
Decimal to Octal Radix Arithmetic
Binary to Octal
Substitution
Octal to Binary Substitution
GENERAL RULES
rj
>
r
f:
use Radix Arithmetic, Substitution
rj
<
r
f
:
use Power Addition, Substitution
rj
=
Radix of initial system
r
=
f
Radix of final system
B-5