Add original unix v6

source/fort/io/iox.s

@@ -0,0 +1,51 @@
+/
+/
+
+/ iox -- io variables
+
+.globl	_nocr
+.globl	utable
+.globl	btable
+.globl	ftable
+
+.globl	_end
+.globl	formp
+
+bufp:	_end
+filnam:
+	<fortxx\0>; .even
+
+	.bss
+
+gflg:	.=.+2
+formp:	.=.+2
+rdflg:	.=.+2
+nflg:	.=.+2
+unit:	.=.+2
+buffer:	.=.+2
+slcnt:	.=.+2
+itype:	.=.+1
+ilen:	.=.+1
+ilval:	.=.+2
+width:	.=.+2
+twidth:	.=.+2
+ndig:	.=.+2
+pbuf:	.=.+10
+ppar:	.=.+2
+llp:	.=.+2
+llpcnt:	.=.+2
+itmflg:	.=.+2
+nspace:	.=.+2
+gcflg:	.=.+2
+binflg:	.=.+2
+
+utable:	.=.+20.
+btable:	.=.+40.
+ftable:	.=.+2.
+rep:	.=.+2
+scale:	.=.+2
+itmfnd:	.=.+2
+ngflg:	.=.+2
+nlflg:	.=.+2
+_nocr:	.=.+2
+