Donald V. Weaver, New York, New York

This program is based on DEC-5-4 and is intended to illustrate

the use of alternative models in program construction.

While not the fastest possible, this program has one or two

interesting features. It converts any 3-digit BCD-coded

decimal number, D₁D₂D₃ into binary in the invariant time

of 372 microseconds. Efficient use is made of BCD positional

logic to work the conversion formula (10D₁ + D₂)10 + D₃ by

right shifts in the accumulator. In special situations, it could

be profitable to insert an initial test/exit on zero, adding

12 microseconds to the time for nonzero numbers. (Write-up

and Listing Only)