0100 /*fundamental constants: cannot be changed */ 0101 0102 0103 #define USIZE 16 /* size of user block (*64) */ 0104 #define NULL 0 0105 #define NODEV (-1) 0106 #define ROOTINO 1 /* i number of all roots */ 0107 #define DIRSIZ 14 /* max characters per directory */ 0108 0109 0110 /* signals: dont change */ 0111 0112 0113 #define NSIG 20 0114 #define SIGHUP 1 /* hangup */ 0115 #define SIGINT 2 /* interrupt (rubout) */ 0116 #define SIGQIT 3 /* quit (FS) */ 0117 #define SIGINS 4 /* illegal instruction */ 0118 #define SIGTRC 5 /* trace or breakpoint */ 0119 #define SIGIOT 6 /* iot */ 0120 #define SIGEMT 7 /* emt */ 0121 #define SIGFPT 8 /* floating exception */ 0122 #define SIGKIL 9 /* kill */ 0123 #define SIGBUS 10 /* bus error */ 0124 #define SIGSEG 11 /* segmentation violation */ 0125 #define SIGSYS 12 /* sys */ 0126 #define SIGPIPE 13 /* end of pipe */ 0127 0128 /* tunable variables */ 0129 0130 #define NBUF 15 /* size of buffer cache */ 0131 #define NINODE 100 /* number of in core inodes */ 0132 #define NFILE 100 /* number of in core file structures */ 0133 #define NMOUNT 5 /* number of mountable file systems */ 0134 #define NEXEC 3 /* number of simultaneous exec's */ 0135 #define MAXMEM (64*32) /* max core per process; 0136 first number is kw */ 0137 #define SSIZE 20 /* initial stack size (*64 bytes) */ 0138 #define SINCR 20 /* increment of stack (*64 bytes) */ 0139 #define NOFILE 15 /* max open files per process */ 0140 #define CANBSIZ 256 /* max size of typewriter line */ 0141 #define CMAPSIZ 100 /* size of core allocation area */ 0142 #define SMAPSIZ 100 /* size of swap allocation area */ 0143 #define NCALL 20 /* max simultaneous time callouts */ 0144 #define NPROC 50 /* max number of processes */ 0145 #define NTEXT 40 /* max number of pure texts */ 0146 #define NCLIST 100 /* max total clist size */ 0147 #define HZ 60 /* Ticks/second of the clock */ 0148 0149 0150 0151 /* priorities: do not alter much */ 0152 0153 0154 #define PSWP -100 0155 #define PINOD -90 0156 #define PRIBIO -50 0157 #define PPIPE 1 0158 #define PWAIT 40 0159 #define PSLEP 90 0160 #define PUSER 100 0161 0162 /* Certain processor registers */ 0163 0164 #define PS 0177776 0165 #define KL 0177560 0166 #define SW 0177570 0167 0168 /* ------------------------ */ 0169 0170 /* structure to access integers : */ 0171 0172 0173 /* single integer */ 0174 0175 struct { int integ; }; 0176 0177 0178 /* in bytes */ 0179 0180 struct { char lobyte; char hibyte; }; 0181 0182 0183 /* as a sequence */ 0184 0185 struct { int r[]; }; 0186 0187 0188 /* ------------------------ */ 0189 0190 0191 0192 0193 0194 0195 0196 0197 0198 0199