Research V6 development

[unix-history] / usr / sys / param.h

diff --git a/usr/sys/param.h b/usr/sys/param.h
index dcb5acb..c422492 100644 (file)
--- a/usr/sys/param.h
+++ b/usr/sys/param.h
@@ -1,23 +1,24 @@
 /*
 /*

- * variables
+ * tunable variables

  */
 
  */
 

-#define        NBUF    15
-#define        NINODE  100
-#define        NFILE   100
-#define        NMOUNT  5
-#define        NEXEC   4
-#define        MAXMEM  (32*32)
-#define        SSIZE   20
-#define        SINCR   20
-#define        NOFILE  15
-#define        CANBSIZ 256
-#define        CMAPSIZ 100
-#define        SMAPSIZ 100
-#define        NCALL   20
-#define        NPROC   50
-#define        NTEXT   20
-#define        NCLIST  100
+#define        NBUF    15              /* size of buffer cache */
+#define        NINODE  100             /* number of in core inodes */
+#define        NFILE   100             /* number of in core file structures */
+#define        NMOUNT  5               /* number of mountable file systems */
+#define        NEXEC   3               /* number of simultaneous exec's */
+#define        MAXMEM  (64*32)         /* max core per process - first # is Kw */
+#define        SSIZE   20              /* initial stack size (*64 bytes) */
+#define        SINCR   20              /* increment of stack (*64 bytes) */
+#define        NOFILE  15              /* max open files per process */
+#define        CANBSIZ 256             /* max size of typewriter line */
+#define        CMAPSIZ 100             /* size of core allocation area */
+#define        SMAPSIZ 100             /* size of swap allocation area */
+#define        NCALL   20              /* max simultaneous time callouts */
+#define        NPROC   50              /* max number of processes */
+#define        NTEXT   40              /* max number of pure texts */
+#define        NCLIST  100             /* max total clist size */
+#define        HZ      60              /* Ticks/second of the clock */

 
 /*
  * priorities
 
 /*
  * priorities


@@ -38,33 +39,53 @@
  * dont change
  */
 
  * dont change
  */
 

-#define        NSIG    13
-#define                SIGHUP  1
-#define                SIGINT  2
-#define                SIGQIT  3
-#define                SIGINS  4
-#define                SIGTRC  5
-#define                SIGIOT  6
-#define                SIGEMT  7
-#define                SIGFPT  8
-#define                SIGKIL  9
-#define                SIGBUS  10
-#define                SIGSEG  11
-#define                SIGSYS  12
+#define        NSIG    20
+#define                SIGHUP  1       /* hangup */
+#define                SIGINT  2       /* interrupt (rubout) */
+#define                SIGQIT  3       /* quit (FS) */
+#define                SIGINS  4       /* illegal instruction */
+#define                SIGTRC  5       /* trace or breakpoint */
+#define                SIGIOT  6       /* iot */
+#define                SIGEMT  7       /* emt */
+#define                SIGFPT  8       /* floating exception */
+#define                SIGKIL  9       /* kill */
+#define                SIGBUS  10      /* bus error */
+#define                SIGSEG  11      /* segmentation violation */
+#define                SIGSYS  12      /* sys */
+#define                SIGPIPE 13      /* end of pipe */

 
 /*
  * fundamental constants
  * cannot be changed
  */
 
 
 /*
  * fundamental constants
  * cannot be changed
  */
 

-#define        USIZE   16
+#define        USIZE   16              /* size of user block (*64) */

 #define        NULL    0
 #define        NODEV   (-1)
 #define        NULL    0
 #define        NODEV   (-1)

-#define        ROOTINO 1
-#define        DIRSIZ  14
+#define        ROOTINO 1               /* i number of all roots */
+#define        DIRSIZ  14              /* max characters per directory */

 
 

+/*
+ * structure to access an
+ * integer in bytes
+ */

 struct
 {
        char    lobyte;
        char    hibyte;
 };
 struct
 {
        char    lobyte;
        char    hibyte;
 };

+
+/*
+ * structure to access an integer
+ */
+struct
+{
+       int     integ;
+};
+
+/*
+ * Certain processor registers
+ */
+#define PS     0177776
+#define KL     0177560
+#define SW     0177570