1 :Info: sdw: 2022-11-16  sdw
 2 
 3 Syntax:  sdw {segno/name} {segno/name}
 4 
 5 
 6 Function:  Displays the SDW's in the current process's DSEG.
 7 
 8 
 9 Arguments:
10 segno/name
11    is the segment number or name of interest.  The first is the
12    starting segment number and the second is the ending segment
13    number.  If only one is given then only one is displayed if none
14    are given then all are displayed.
15 
16 
17 Notes on sdw display:
18 The sdw request displays the segment number, name, memory address,
19 ring brackets, the maximum computed address, the entry bound address
20 and a bit string REWPUGCDF.
21 
22 
23 List of display definitions:
24 ADDRESS
25    is the base address of the segment or segment page table.
26 RNGS
27    the ring brackets of the segment.
28 CA-MAX
29    the highest computed address that may be used in referencing the
30    segment without causing an out_of_segment_bounds fault.
31 EBOUND
32    is the entry bound or call limiter. Any external call to this
33    segment must be to an offset less than the EBOUND if the entry
34    bound switch (G) is off.
35 SEGNO
36    segment number.
37 
38 
39 SEGMENT-NAME
40    segment name.
41 
42 
43 REWPUGCDF
44    The letter will show in the sdw display of the segment if the bit
45    is on.  The REWPUGCDF string is broken down as follows:
46      R  is the read permission bit
47      E  is the execute permission bit
48      W  is the write permission bit
49      P  is the privileged bit
50      U  is the unpaged bit, segment is unpaged (has no page table)
51         if this bit is on
52      G  is the gate indicator or entry bound bit. If off, the entry
53         bound is checked by hardware
54      C  is the cache enable switch.
55      DF is the directed fault bit. If on, the necessary page of the
56         segment is in memory.
57 
58 
59 Examples:
60 
61  ADDRESS RNGS  CA-MAX REWPUGCDF EBOUND SEGNO SEGMENT-NAME
62  6262154  000  177777 R W  G DF      0   200 str_seg
63        0  000   37777 R W  G         0   300 >udd>Multics>GDixon
64     3400  000    2777 R W UG DF      0     3 dn355_mailbox
65 
66 
67 :hcom:
68 /****^  HISTORY COMMENTS:
69   1) change(2022-11-16,GDixon), approve(2023-01-16,MCR10129),
70      audit(2023-02-28,Swenson), install(2023-02-28,MR12.8-1054):
71       A) Correct typo in description of SDW U bit.
72                                                    END HISTORY COMMENTS */
73