Tandy 1000 Basic Reference Manual page 246

Chapter 10 I BASIC Ke.ywords
OPE N/C ommunications Statement
OPEN
" C O M c h a n ~ l : [speed] [,purity1 [,datul[,stopl
[,RSI[,CS[secondsl][,DS[secondslj[,CD[seconds]
j[,m&]
[,PEl [,LFl" AS
[#lbuffer[LEN
=
number]
Opens a file and allocates a buffer for RS-232C (Asynchronous
Communications Adapter) communication.
Channel can be 1 or 2 to select the communications channel to
be opened.
Speed is
a n integer specifying the transmit and receive rate in
bits per second (bps). Valid speeds are 75, 110, 150, 300, 600,
1200, 2400, 4800, and 9600.
If
you omit
speed,
BASIC sets the
speed at
300 bps.
Parity
is a constant specifying the parity to be used when the
data is transmitted and received. The constant must be one of
the following:
E
0
M
S
N
EVEN transmit parity, EVEN receive parity
checking.
ODD t r a n s m i t p a r i t y , ODD receive parity
checking.
parity bit always transmitted and received as a
mark (1 bit).
parity bit always transmitted and received as a
space (0 bit).
no transmit parity, no receive parity checking.
If you omit
parity,
BASIC assumes E (EVEN).
Data
is a n integer specifying the number of transmit and re-
ceive bits. Valid values are 5 , 6, 7, and 8. If you do not specify
data,
BASIC assumes
7.
Note: Eight data bits with parity is illegal.
Stop
must be either 1 or 2 to indicate the number of stop bits. If
you omit
stop, 75
and 110 bps transmit 2
stop
bits, and all other
speeds transmit 1
stop
bit.
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