V3/man/man2/csw.2

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.pa 1
.he 'CSW (II)'7/29/72'CSW (II)'
.ti 0
NAME		csw -- read console switches
.sp
.ti 0
SYNOPSIS	sys csw	/ csw = 38. not in assembler
.br
(value of csw in r0)
.br
(value of buttons in r1)
.sp
.ti 0
DESCRIPTION	The setting of
the console switches is returned in r0.
The setting of the
external buttons is returned in r1.
.a
The return is synced to
a 30 CPS clock for graphical applications.
.sp
.ti 0
SEE ALSO	--
.sp
.ti 0
DIAGNOSTICS	none
.sp
.ti 0
BUGS		Currently the buttons are unavailable.