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 +1,23 @@
+/ C library -- read
+
+/ nread = read(file, buffer, count);
+/
+/ nread ==0 means eof; nread == -1 means error
+
+.globl	_read, cerror
+
+_read:
+	mov	r5,-(sp)
+	mov	sp,r5
+	mov	4(r5),r0
+	mov	6(r5),0f
+	mov	8(r5),0f+2
+	sys	0; 9f
+	bec	1f
+	jmp	cerror
+1:
+	mov	(sp)+,r5
+	rts	pc
+.data
+9:
+	sys	read; 0:..; ..