Tandy 600 Programmer's Reference Manual page 192

Bios programmers
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User
Defined
Pop-ups
(Control
F4
-
F8)
Notes on User
defined pop-ups:
a.
It
is
possible
to
make
any
valid
application
in
memory
a pop-up.
b.
User
definable
pop-up keys
are
from
F4
to
F8.
c.
By making
certain applications
pop-ups
it
forces others
to
contend
with
file
sharing.
One
such
example would be
to
make
Calendar a
pop-up,
RUN
Alarm
then
Pop up
Calendar
and
modify
the
data
that
Alarm had
displayed. Situations
like
this
can
cause
nasty problems.
d.
All
the
data
needed
to
configure
pop-ups
is
kept
in
the
System
Environment
file
(ENVIRON
.SYS).
e.
Remember,
some
pop-ups need
extra
memory
to
run
so
if
there
is
a
Low
or
system
memory
condition
in
the
system
the
pop-up
may
not
be
invoked.
Turn
CALENDAR
into
a
pop-up:
a.
Run
File
on
the
System
Environment
file
(EN
VI
RON.
SYS).
b.
Move
to
the
NEW
record
in
the
NAME
field
and
type the
string
$$FK5.
c.
Move
over
to
the
TEXT
field
in
the
same
row and
type
CALENDAR.
d.
Push
the enter
key then
Quit FILE.
Wait
for
the
System Manager
to
display.
e.
Push
the
Warm
Start
Break
button.
f.
Now
Push
the Control F1
key
to
get a
display of
the
available
Pop-ups.
The 5
should
have
the
word Calendar above
it.
g.
Push
Control F5.
If
the
above
steps
were done
properly,
Control
F5
should
pop
up
Calendar.
h.
Repeat
the
above
steps using
different
Function
keys
(valid
keys
are
from
4-8)
and
application.
Run
Previous
(Control F9)
Run
previous
between
the
same
application.
a.
Start
an
application
on a
file
then
Quit.
b.
Start
the
same
application
on
another
file
then perform
a
Run
previous.
c.
Perform
run
previous
64
times.
Each
time
run
previous
is
performed,
wait
until
the
screen
is
redrawn
before performing the
next.
d.
Repeat
the
above
steps
for
each
application.
186

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