Tandy 1000 SL Technical Reference Manual page 542

BIOS Services
7 6 5
Baud Rate
Function Descriptions
Reset Comm Port
Reset (or initialize) the communication port according to the
parameters in AL, DL, and DH.
4 3 2 1 0
Parity Stop Bits Word Length
Entry Conditions
AH
=
0
AL
=
RS-232Cparameters, as follows:
DX
=
port number (0 or 1)
b
I
I
000
=
110baud 00 =none 0 =1 bit 10 =7bits
001
=
150baud 01 =odd
1
= 2 bits 1 1 = 8 bits
010
=
300baud 1 1 =even
011
=
600baud
100
=
1200 baud
101 =2400 baud
110 =4800baud
1 1 1
=9600 baud
Exit Conditions
AX
=
RS-232C status; See the fol1owing"Get Current
Comm Status" (AH
=
3)
21.