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APPENDIX C: DIP-Switch Settings and Their Numeric Equivalents
147
Appendix C: DIP-Switch Settings
and Their Numeric Equivalents
Table C-1 on the next page is useful for two purposes:
1. If you need to override the physical setting of the DIP switch on the currently selected computer channel’s
CPU-Interface Card (see Section 4.2), you can issue the “<CM>SW=n[Enter]” command (see Section 8.14)
to do so, where n is the decimal number that equals the binary number that in turn corresponds to the
desired DIP-switch setting (1 = ON, 0 = OFF). For example, suppose the Card is currently set to translate
composite sync to H/V-sync for your monitor, to use a 1-second timeout, and to reverse the keyboard keys
when it maps. The DIP switch would read, from left to right (position 8 through position 1), “OFF OFF
OFF ON OFF OFF ON OFF”—00010010 binary. Now suppose you’ve swapped in a somewhat slower PC-
compatible computer that outputs sync on green, and you want to alter the Card’s DIP-switch setting so
that the Card translates sync on green to H/V-sync, uses a 10-second timeout, and does not reverse the
keyboard keys. If you had to manually reset the DIP switch, it would read “OFF OFF OFF OFF ON OFF
OFF ON”, 00001001 binary. Looking this up in Table C-1 shows you that this equals 9 decimal, so instead
of removing the Card and fussing with it, you can just send it the “<CM>SW=9[Enter]” command.
2. In a cascaded ServSwitch Multi system, all of the Expansion Transmit Cards in a given Switch must have
their DIP switches set to the same unit address, and this address must be unique to that Switch. So if you
want a new Switch you’re adding to the system to be unit 7, look up 7 decimal in Table C-1; it will show you
that you should set the DIP switch to 00000111 binary, which corresponds to (left to right—position 8
through position 1) “OFF OFF OFF OFF OFF ON ON ON.” Note that addresses 0 and 255 are reserved;
do not set the Card to these addresses.
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