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APPENDIX C: Commands for Advanced Users
Most CPUs that use keyboard mode 1 or 3 send a
“mode command” to the keyboard at power-up, to put
the keyboard in the proper mode. A Spectra can use
these commands to automatically detect each such
CPU’s keyboard mode when you turn on the CPU after
it has been cabled to the Spectra. However, the Spectra
doesn’t automatically save this value; unless you send it
a Keep Settings command, it will forget the modes it has
detected when it is powered down, then default to each
port’s most recently saved setting when it’s powered up
again.
The Spectra can’t detect the CPU’s keyboard mode
if the CPU doesn’t send “mode commands” (most CPUs
that use mode 2 fall into this category) or if the CPU is
already ON when you connect it to the Spectra (it
shouldn’t be). In these situations, the Spectra tries to
use the keyboard-mode setting stored in its nonvolatile
memory for that port. The factory-default is mode 2
for all ports. Send the Set Keyboard Mode command
to change the keyboard mode for a port if:
• the CPU on that port uses mode 1 or 3,
• it uses mode 2, but the default setting of the port
you want to connect it to has been changed, or
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