IBM SBC-658 사용자 설명서

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                   10   SBC-658  User Manual
Jumpers and connectors
Connectors on the board link it to external devices such as hard
disk drives, a keyboard, or floppy drives.  In addition, the board
has a number of jumpers that allow you to configure your system
to suit your application.
The following tables list the function of each of the board's
jumpers and connectors.
J u m p e r s
Label
Function
SW1 (S5, S6)
DOC  address  select
J1
LCD clock signal & driving voltage select
J2
COM2 RS-232/422/485 select
J3
COM2 RS-232/422/485 select
J4
Clear CMOS Connectors