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TABLE 3
S REGISTERS
Register
Function
Default
Range
512
Determines the delay
50 fiftieths
20 to 255
periods required for the
of a second
modem to recognize the
(1 second)
escape command.
513
Determines how char-
0 to 255
acters are formatted
for communication to
take place.
Bit 0 undefined
Bit 1 off = basic message
off
set
on = extended
message set
Bit 2 off = parity disabled
off
on = parity enabled
Bit 3 off = odd parity
off
on = even parity
Bit 4 off = 7 data bits
on (16)
on = 8 data bits
Bit 5 undefined
Bit 6 off = buffer overflow
on (64)
on = no buffer
overflow
Bit 7 off = eighth data bit
set to space
(if bit 4 is on)
on = eighth data bit
set to mark
(if bit 4 is on)
Si 4
Determines a variety of
0 to 255
modem functions.
Bit 0 reserved
Bit 1 off - local echo
on (2)
disabled
on = local echo
enabled
Bit 2 off = messages
off
displayed
on = messages not
displayed
Bit 3 off - messages dis-
on (8)
played in numbers
on - messages dis¬
played in words
28
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