Determining Values For Bit-Mapped Registers - Atari SX 212 Owner's Manual

To read the value of an S register, follow these steps:
1. Type the command ATS followed by the number of the
register you want to read (0 to 18) and a question mark;
for example, ATS6?
2.
Press
[Return]
to view the current value of that register.
To change the value of an S register, follow these steps:
1. Type the command ATS followed by the number of the
register you want to change (0 to 18), an equal sign, and
the numeric value you want to set for this register; for
example, ATS6 = 4.
2.
Press
[Return]
to change the register to the new value.
An OK message tells you the register has been changed.
To reset the modem to its default register settings (and its
default option settings), type the command ATZ and press
[Return],
(You could also reset the modem by turning it off,
then on, and typing AT.)
Determining Values for Bit-Mapped Registers
Your SX212 Modem supports five bit-mapped S registers
(registers 13, 14, 15, 17, and 18). Bit-mapped means that each
of the eight bits in the register has a separate meaning or
function. This means that you can set eight separate func¬
tions for your modem by entering one numeric value for the
entire register.
Each bit can be either on or off. When a bit is off, it has a
numerical value of zero. When a bit is on, it has a unique
numerical value, depending on which bit it is. These values
are shown below.
Bit 0 1
Bit 1
2
Bit 2 4
Bit 3
8
Bit 4
16
Bit 5
32
Bit 6 64
Bit 7
128
25