Add original unix v6

2018-01-27 22:35:41 +09:00
commit 2c7099ee50
664 changed files with 106254 additions and 0 deletions
@@ -0,0 +1,19 @@
+/ C library -- dup
+
+/	f = dup(of)
+/	f == -1 for error
+
+dup = 41.
+
+.globl	_dup, cerror
+
+_dup:
+	mov	r5,-(sp)
+	mov	sp,r5
+	mov	4(r5),r0
+	sys	dup
+	bec	1f
+	jmp	cerror
+1:
+	mov	(sp)+,r5
+	rts	pc