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# shut down data process
adn

# adn powers off port 17, power it back on.
eio 17 1

# start minicom
# The default baud rate of minicom on that port is 9600, which is what the 7500 
# uses after it is sent a break. To set it to 9600 explicitly, use ctrl-A pe.
# Use ctrl-A minicom commands to turn on local echo (e), line wrap (w) and send a break(f).
# Set bandwidth to 1020 and RS232 output frequency to 20.
# Set terminator to 0A (newline):

minicom ttyS17
ctrl-A pe
ctrl-A e
ctrl-A w
ctrl-A f
(Outputs (BW 1020) (RS232 (Freq 20.0)))
ctrl-A f
(Outputs (RS232 (EOL "0A")))
ctrl-A f
(Outputs ?)
ctrl-A q

# minicom should now be finished

# power off port 17
eio 17 0

# start data process. This will power up port 17
aup

# wait a bit, then
ds
ctrl-C


# If the 7500 doesn't respond, try power cycling it:
eio 17 0
eio 17 1