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@BEGIN_FILE_ID.DIZUsr Courier Undocumented commands!
@END_FILE_ID.DIZ
USRobotics Courier V.34: Undocumented Features
----------------------------------------------
AT Commands
-----------
^BE^GHmX^I^H (where ^ indicates a control character)
enter flash rom programming mode
h = hex digit, n = decimal digit, [] = optional
G=[hhhh:]hhhh display a byte dump of the modem memory
GR[hhhh:]hhhh display a word dump of the modem memory
GIhhhh read value from I/O port
GOhhhh,hh write value to I/O port
GBhhhh dump 256 sequential I/O ports
GN (unknown, set flag)
GXhhhh (unknown)
GYhhhh (unknown)
RS99? display copyright notice
USR display copyright notice and credits
Yn
n = 5: self test
n = 6: (unknown, gives OK)
n = 7: while online: signal quality screen
n = 8: (unknown, displays lots of cryptic data)
n = 9: (unknown, displays lots of cryptic data)
n = 10: (unknown, not implemented?)
n = 11: while online: display frequency level
n = 12: while online: display recv / xmit level (?)
n = 13: (unknown)
n = 14: (unknown; displays six bytes, final one is country code)
n = 15: display dipswitch settings
n = 55: (unknown)
&J (unknown; works only in a specific, unknown mode of
operation)
~S? display the 16-place serial number of the modem
~S-ddmmyy-nnnnnnccnnnnnnnn
save a new serial number to NVRAM
ddmmyy supervisor date
n a digit
c any character
S registers
-----------
Saved to NVRAM:
S31 (unknown)
S35 (unknown)
S36 (unknown)
S37 (unknown)
S39 (unknown)
S40 (unknown)
.1 Germany: disable ATA
.2 Germany: blocking
S57 (unknown)
.0 Germany: disable blacklisting
Volatile:
S17 (unknown, only written to)
S20 (unknown)
S30 (unknown)
S50 (unknown, only written to)
General AT Parser Idiosyncracies
--------------------------------
- If not between Sn and = or ?, .n will be ignored.
Country Codes:
--------------
0 = USA/Canada 10 = New Zealand
1 = Japan 11 = Czechoslovakia
2 = Finland 12 = Belgium
3 = Sweden 13 = Denmark
4 = UK 14 = Australia
5 = Norway 15 = France
6 = Switzerland 16 = Germany
7 = Netherlands 17 = International
8 = South Africa 18 = Austria
9 = Italy 19 = Ireland
The country code, as all the Y14 bytes, is saved to NVRAM. There is a
Cx=n command to modify those bytes, unfortunately this command is disabled.
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