remove conflict with clock cards and command line arguments

src/vmsrc/cmd.pla

@@ -35,7 +35,7 @@ predef execmod(modfile)#1
 //
 word version    = $0100 // 01.00
 word syspath
-word            = getlnbuf
+word syscmdln
 word            = @execmod
 //
 // Working input buffer overlayed with strings table
@@ -1308,7 +1308,8 @@ loop
 // Set system path
 //
 strcat(strcpy(@sysmods, $280), "SYS/")) // This is the path to CMD
-syspath = @sysmods // Update external interface table
+syspath  = @sysmods // Update external interface table
+syscmdln = @cmdln
 //
 // Try to load autorun.
 //
@@ -1324,16 +1325,16 @@ else
 fin
 perr = 0
 while 1
-    if cmdln
-        when toupper(parsecmd(@cmdln))
+    if ^getlnbuf
+        when toupper(parsecmd(getlnbuf))
             is 'Q'
                 reboot()
                 break
             is 'C'
-                catalog(@cmdln)
+                catalog(getlnbuf)
                 break
             is 'P'
-                setpfx(@cmdln)
+                setpfx(getlnbuf)
                 break
             is '/'
                 repeat
@@ -1347,11 +1348,11 @@ while 1
                 volumes()
                 break
             is '-'
-                execsys(@cmdln)
+                execsys(getlnbuf)
                 break
             is '+'
                 saveX
-                execmod(striptrail(@cmdln))
+                execmod(striptrail(getlnbuf))
                 //
                 // Clean up
                 //