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PDP 10 Marcro UUO
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Posted 7/25/2014 11:40 AM
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Active: 7/24/2014
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What is "UUO" as used in DEC macros?
What did the UUO mnemonics do?

On the Wikipedia page
https://en.wikipedia.org/wiki/MACRO-10
the example code has this
"SEARCH UUOSYM ; Make UUO symbol names available"
in the middle of the *original* FORTRAN 77 code for "Colossal Cave Adventure 550" there is this comment "if uuotime or uuodate is..." This program was written in 1978 for a PDP10 machine.

On page C-14 of the DEC publication,
"decsystem10 MACRO ASSEMBLER REFERENCE MANUAL
AA-C780C-TB
April 1978
OPERATING SYSTEM & VERSION: TOPS-10, Version 6.03
SOFTWARE VERSION: MACRO-10, Version 53"
it says,
"MACRO-DEFINED MNEMONICS
C.6 F40 UUO MNEMONICS
Table C-10 shows mnemonics that are defined only if MACRO is assembled
with the F10 switch on. These mnemonics generate UUOs, which are
handled properly if the program is running under control of the FORSE
object-time system."

Nick Beeson
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