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Host introspection: Difference between revisions
Example added in PDP-10 assembly (MACRO-10/TOPS-20).
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(Example added in PDP-10 assembly (MACRO-10/TOPS-20).) |
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Checkit
</lang>
=={{header|MACRO-10}}==
<lang MACRO-10>
title Host Introspection
subttl PDP-10 assembly (MACRO-10 on TOPS-20). KJX 2022.
search monsym,macsym
comment \
The wordsize is detected by putting 1 into a re-
gister, counting the leading zeros (resulting in
wordsize-1) and adding 1 to the result.
Endianness doesn't really apply, as the PDP-10 is
a 36bit word-adressable computer, and the handling
of characters is peculiar enough that it would get
out of hand if I'd dive into the details here.
\
a=:1 ;Define three accumulators.
b=:2
c=:3
start:: reset% ;Initialize process.
movei a,1 ;Set A to 1.
jffo a,.+1 ;B = leading zeros of A.
aos b ;Add 1 to B. -> wordsize.
movei a,.priou ;Print B on standard output
movei c,^d10 ;in base 10.
nout%
jfcl
haltf% ;Halt program.
jrst start ;Allow continue-command.
end start
</lang>
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