Radio Shack TRS-80 Model III - Page 60

TRS-80
MODEL
III
To
Route
from
One
Device
to
Another
Note: To
actually
try out
the next
four
steps,
you must
have
printer
connected
to
your
Computer.
If not,
just read
through
the example.
1
.
Store
the
Source
Device
Abbreviation
in memory
locations
16930-16931
. For
example,
to
store
DO (display)
as the
source
device,
execute the
BASIC
statements:
POKE
1
6930, ASC("D")
POKE
16931,
ASCCO")
2. Store
the
Destination
Device
Abbreviation
in memory
locations
16928-16929.
For
example
,
to
store PR
(printer)
as
the destination
device
, execute
the BASIC
statements:
POKE
16928, ASC("P")
POKE
16929,
ASCfR")
3. Setup
a USRcall
to
SROUTE
(address
108). For
example,
execute
the BASIC
statements;
POKE
16526,
108
POKE
16527,0
4
.
Make
a USR
call to
SROUTE
with
a dummy
argument
. For
example
, execute the
BASIC
statements:
X=USR(0)
Upon
completion
of
Step
4,
the route
is
completed.
Now
everything
you send
to
the
display
will
be sent
to
the printer
instead.
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