SWIT - examine and change user switch words.

swit [options]

(+|-)Verbose      (+|-)Print (-)
ON=[nn[,nn]*]     OFf=[nn[,nn]*]
(+|-)nn
Low=nn            High=nn
First=nn          Second=nn

swit
swit l=0 on=5,6,7 +p
swit h=777777777777 -72 +5 +v

+nn: turns on the specified bit.
-nn: turns off the specified bit. If the same bit is mentioned in both a +nn and -nn form, it is left unchanged.
Low=nn
First=nn: sets the low word to the specified octal value.
High=nn
Second=nn: sets the high word to the specified octal value.
OFf=[nn[,nn]*]: turns off the bits that are listed.
ON=[nn[,nn]*]: turns on the bits that are listed. If a bit is listed for both ON and OFf, it is left unchanged.
+Print: displays the switch words in octal format, low word first.
+Verbose: displays a list of the bits that are set. This is the default if no other options are given.
-Verbose: does not show what bits are set.

SWIT lets you examine the contents of the Program Switch Words and turn PSW bits on or off. The current meanings of the PSW bits are given below:

First switch word (.LSWTH)

The following conditions are indicated by the specified bit being on.

0: ALGOL RUN or Call TAPE subsystem after execution.
1: JOVIAL RUN or Call RECO subsystem after execution.
2: BREAK received while in EDITOR build mode.
3: Recovery/Rollback in effect.
4: VIP 7700 cassette active for read or write.
5: Transparent Paper Tape Mode (LUCID).
6: VIP 7700 print page adapter operable.
7: Reserved.
8: OLDP/NEWP command in effect.
9: CHAIN overlay (BASIC) in use.
10: Automatic dump (sy**) engaged.
11: HOLD command in effect.
12: Paper tape source file (SYT*) exists.
13: Error was detected by last subsystem executed.
14: Last RESEQUENCE command was in a non-BASIC subsystem.
15: OLD/NEW command received from user.
16: NOPARITY command in effect.
17: Valid data on "sy**" file.
18-35: These are used by user programs. Note that many subsystems are "user" programs to TSS, and return status information in these bits. See "expl b lib exit" for a common use.

Second switch word (.LSWT2)

Bits are numbered from 36 to 71. For the sake of convenience, we also list the position of bits in the word (0-35).