File psl-1983/20-tests/dsub4.mac from the latest check-in
radix 10 extern L0001 extern L0002 extern SYMNAM extern SYMVAL extern SYMFNC extern SYMPRP extern L0003 extern L0004 extern ARG1 extern ARG2 extern ARG3 extern ARG4 extern ARG5 extern ARG6 extern ARG7 extern ARG8 extern ARG9 extern ARG10 extern ARG11 extern ARG12 extern ARG13 extern ARG14 extern ARG15 BUFFER: block 21 intern BUFFER end