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Research V6 development
[unix-history]
/
usr
/
sys
/
reg.h
diff --git
a/usr/sys/reg.h
b/usr/sys/reg.h
index
ce330b8
..
71f1b5f
100644
(file)
--- a/
usr/sys/reg.h
+++ b/
usr/sys/reg.h
@@
-1,3
+1,8
@@
+/*
+ * Location of the users' stored
+ * registers relative to R0.
+ * Usage is u.u_ar0[XX].
+ */
#define R0 (0)
#define R1 (-2)
#define R2 (-9)
#define R0 (0)
#define R1 (-2)
#define R2 (-9)
@@
-7,3
+12,5
@@
#define R6 (-3)
#define R7 (1)
#define RPS (2)
#define R6 (-3)
#define R7 (1)
#define RPS (2)
+
+#define TBIT 020 /* PS trace bit */