DEC RADIX 50

RADIX 50[1][2][3] or RAD50[3] (also referred to as RADIX50,[4] RADIX-50[5] or RAD-50), is an uppercase-only character encoding created by Digital Equipment Corporation (DEC) for use on their DECsystem, PDP, and VAX computers.

RADIX 50's 40-character repertoire (050 in octal) can encode six characters plus four additional bits into one 36-bit machine word (PDP-6, PDP-10/DECsystem-10, DECSYSTEM-20), three characters plus two additional bits into one 18-bit word (PDP-9,[2] PDP-15),[6] or three characters into one 16-bit word (PDP-11, VAX).[3]

The actual encoding differs between the 36-bit and 16-bit systems.

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  3. ^ a b c Cite error: The named reference DEC_1971_PAL-11R was invoked but never defined (see the help page).
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