update sys NOTES

2016-03-11 11:23:59 -05:00
parent f3dad7916b
commit df1d8e29dd
1 changed files with 10 additions and 1 deletions
@@ -5,6 +5,8 @@ uid -1 is superuser

 process 1 is "init", runs as superuser

+there are ten process slots, pids are 18 bits.
+
 DISK
 ====

@@ -28,7 +30,7 @@ inode format
 ------------
 ```
   i.flags
-        400000  free?? (checked/toggled by icreat)
+        400000  in use
        200000  large file
        000040  special file
        000020  directory
@@ -69,3 +71,10 @@ i numbers
  11    "display" (graphic-2) special file
  12    "pptout" (paper tape punch) special file
 ```
+
+swapping
+--------
+
+Only one process is in memory at any time (in the high half of the 8KW
+memory).  The ten processes are swapped to the last ten tracks of the
+disk.