Timewave DSP-232, Operating Manual

Page: 42 / 271

Chapter 4 Terminal Interfacing
“ n ” 0 to $FFFF (0 to 65,535 decimal) specifies a four-digit hexadecimal value, where each bit controls a
different function described below.
CUSTOM
was originally introduced to allow specialized features for custom applications to be added to AEA Data
Controllers without burdening you with extra commands. Since the CUSTOM command is quickly filling up, UBIT
has been added to replace
CUSTOM
to allow for additional features. The
CUSTOM
command is retained for
compatibility, but we recommend using the UBIT command as it’s more flexible and easier to use.
For those applications that can’t take advantage of the UBIT command, the following terminal-related
CUSTOM
features are available in the DSP-232. See Appendix C for a complete list.
Bit2, position $0004:
If bit 2 is set to
1
, (default), a break on the RS-232 line will put the DSP into the
Command mode (except for Host mode). If set to
0
, a break on the RS-232 line will
not affect the DSP.
Bit 5, position $0020:
If bit 5 is set to
0
, (default) the DSP will always power up in the Command mode. If
bit 5 is set to
1
, then the DSP will remain in the previous mode, that is, Converse,
Command, or Transparent mode.
Bit 14, position $4000:
If bit 14 is set to
0
(default), the transmit buffer for data sent from the computer to the
DSP is limited only by the DSP memory. If bit 14 is set to
1
, the serial flow control
will permit only a maximum of 7 I-frames to be held by the DSP before transmission.
This solves a problem with the YAPP binary file transfer program which relies on a
small TNC transmit buffer to operate correctly.
Bit 15 is unused at the present time. To
(RETURN) CUSTOM
to the default setting, type
CU Y
or
CU ON
at the
command prompt.
DAYStamp on/off
Default: off
Host: DS
on The DATE is included in CONSTAMP and MSTAMP displays.
off
Only the TIME is included in CONSTAMP and MSTAMP displays.
DAYSTAMP
activates the date in CONSTAMP and MSTAMP. Set DAYSTAMP ON when you want a dated
record of packet channel activity, or when you’re available for local packet operation.
DAytime date and time Default: none
Host: DA
date and time
Current date and time used to set the DSP’S internal clock.
DAYTIME
is used in many modes and should be set when the DSP is initially powered up.
The clock isn’t set when the DSP is first turned on. The
DAYTIME command displays the
?clock not set
error message until it’s set as follows:
YYMMDDHHMMSS
Example:
cmd: daytime 951125065923
September, 05 4-9