Aucbvax.1543
fa.unix-wizards
utzoo!duke!mhtsa!ucbvax!DYER@HARV-10
Sat Jun 6 09:27:33 1981
405 exec's
405 exec's have been around a while at Harvard, but only recently
have been anything more than a curiosity. The maintainer of PPL,
a large interpretive teaching language running on our 11/70's, finally
ran out of I-space to implement a number of new features. He used
405 exec's to implement little-used functions, exec'ing back to the
main 411 when they were finished.
Getting the Harvard MACRO-11 LINKR to produce such a file was a bit
of a mess. Basically, one had to hand-assign the needed addresses
(based on the 411 file) and adb a 405 in the front. Usually, several
"nm ... vi ... macro ... linkr" iterations were necessary. However,
because these functions looked at only a small part of the available
data space, the job wasn't too laborious. So it works, if you take the
time.
Steve
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