copied ln.s and un.s from scans

src/cmd/ln.s

@@ -0,0 +1,106 @@
+"** 09-1-35.pdf page 15
+" ln
+
+   lac 017777 i
+   sad d4
+   jmp error
+   lac 017777
+   tad d1
+   dac dirn
+   lac dirn i
+   sad qli
+   jmp clink
+   lac 017777
+   tad d5
+   dac dirn
+   dac name
+
+loop:
+   lac 017777 i
+   sad d8
+   sys exit
+   tad dm4
+   dac 017777 i
+   lac name
+   tad d4
+   dac name
+   dac name1
+   sys link; dirn: 0; name: 0; name1: 0
+   sma
+   jmp loop
+   lac name
+   dac 1f
+   lac d1
+   sys write; 1: 0; 4
+   lac d1
+   sys write; errmes; 2
+   jmp loop
+
+clink:
+   lac 017777 i
+   sad d8
+   jmp arg1
+   sad d12
+   jmp arg2
+   sad d16
+   jmp arg3
+
+error:
+   lac d1
+   sys write; errmes+1; 1
+   sys exit
+
+arg1:
+   lac 017777
+   tad d5
+   dac larg+1
+   dac larg+2
+   jmp dlink
+arg2:
+   lac 017777
+   tad d5
+   dac larg
+   tad d4
+"** 09-1-35.pdf page 16
+   dac larg+1
+   dac larg+2
+   jmp dlink
+arg3:
+   lac 017777
+   tad d5
+   dac larg
+   tad d4
+   dac larg+1
+   tad d4
+   dac larg+2
+dlink:
+   sys link; larg: defdir;0;0
+   sma
+   sys exit
+   lac larg
+   dac 1f
+   lac larg+1
+   dac 2f
+   lac larg+2
+   dac 3f
+   lac d1
+   sys write; 1:..; 4
+   lac d1
+   sys write; 2:..; 4
+   lac d1
+   sys write; 3:..; 4
+   lac d1
+   sys write; errmes; 2
+   sys exit
+
+errmes:
+   040; 077012
+d1: 1
+qli: <li>
+d12: 12
+d16: 16
+defdir: <sy>;<st>;<em>;040040
+d4: 4
+d8: 8
+dm4: -4
+d5: 5

src/cmd/un.s

@@ -0,0 +1,49 @@
+"** 14-148-165.pdf page 18
+" un
+
+   sys open; n.out; 0
+   spa
+   jmp error
+   sys read; buf; 3072
+   cll; idiv; 6
+   lacq; cma; tad d1
+   dac c1
+1:
+   lac t1
+   tad d4
+   dac t2
+   lac i t2
+   sad d3
+   skp
+   jmp 2f
+   lac d1
+   sys write; t1: buf; 4
+   lac d1
+   sys write; mes+1; 1
+2:
+   lac t1
+   tad d6
+   dac t1
+   isz c1
+   jmp 1b
+
+   sys exit
+
+error:
+   lac d1
+   sys write; mes; 2
+   sys exit
+
+mes:
+   077; 012
+n.out:
+   <n.>;<ou>;<t 040; 0400040
+
+d1: 1
+d6: 6
+d3: 3
+c1: 0
+t2: 0
+d4: 4
+
+buf: