Radio Shack TRS-80 Model III - Page 87

OPERATION
$RSTX
—
85/X0055'
Transmit a Character to the RS-232-C
Interface
If
RS-232-C
Wait
is
enabled, this routine waits until the character is transmitted or
until (BREAK) is pressed.
If
Wait is not enabled, it returns whether
or not
a
character is transmitted.
Entry Conditions
A
=
Character or
(16880)
=
Character
Exit Conditions
NZ
Status
or
(16880)
=
if no character was sent.
DE is altered.
Sample
Z-80
Programming
SeeSRSINIT.
$SETCAS
—
12354/X3042'
Prompt User to Set Cassette
Baud Rate
This call repeats the first question
in the Model 111 start-up
dialog. It displays the
prompt:
Cass?
on the next line of the display ,
and waits for the
operator to type "H" (high
—
1 500
baud)
or "L" (low—
500)
or (IHTER)
(default to high).
Upon return
from the call, the cassette
rate is set
accordingly.
Entry Conditions
None
Exit
Conditions
All
registers are altered.
Sample Z-80
Programming
SeeSCSHWR.
77