Vector Basic Interpreter Basic 80 Reference Manual - page 42
of
190
To specify the starting address of
an
assembly
language subroutine.
The digit
corresponds
to
the
number
of the USR routine
whose address is being specified.
If
omitted,
OEF
USRO
is
assumed.
The value of
of
the
USR
routine.
See
Appendix
C,
Assembly
Language Subroutines.
Any
number of
OEF
USR statements may appear in a
program
to
redefine
subroutine
starting
addresses,
thus
allowing
access
to
as
many
subroutines as necessary •
•
200
OEF
USRO-24000
210 X-USRO{YA2/2.89)