Tandy 600 Programmer's Reference Manual page 195

LCD
LCD
is
a
write only device.
All
output
to
LCD
goes
to
the screen.
Print to
LCD
using various applications.
Check
that the
screen
is
redrawn
after printing.
Try
Merging from
LCD
with
Word
or
Loading from
LCD
with
BASIC.
KYBD
KYBD
is
a read only device.
All
data from
KYBD
comes
from the
keyboard.
Try
Merging from
KYBD
with
Word
or
Loading
from
KYBD
with
BASIC.
Try
to Print
to
KYBD
with various applications.
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