Transmit
= 0 to disable the transmitter
= 1to enable the transmitter
RTS
DTR
= 0 to setDataTerminal Ready signal low
= 1to
set
Data Terminal Ready signal high
= 0 to set Request to Send signal low
= 1to set Request to Send signal high
Forexample, to select7-bit words, even parity, two stop-bits, transmit-enable,
DTR
high and RTS high, calculate the code this way:
Code =
(1
*128) +
(2
*32) +
(1
*16) + (0 *8) +
(1
*4) +
(1
*2) +
(1
*1)
=
215
Foradditional information on how to determine the appropriate code
characteristics, read
$RSINIT
in
the Technical Information Chapter and see
Appendix
I.
Wait/Don't-
Wait
Switch
TheTRS-80 lets you choose eitherWait or
Don't
-Wait serial 110.
Whenyou selectWait110, the TRS-80 will not return from a serial
110
call until the
operation is successful
(i.e.,
a characteris transmitted orreceived). Pressing
(BREAK)
will return control to your program.
Whenyou select
Don't
-Wait110, the TRS-80 will return from a serial
110
call even
if
the operationwas not successful (i.e., no character was transmitted
or
received).
Thecontents
of
memory location 16890 determines which procedure is used:
Contents
of
16890
Zero
Non-Zero
ProcedureUsed
Don't-Wait
Wait
8/7
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