User Manual version 2.1
OPEN (660) 120/140/150
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6.2.1. Jumpers & Jumper Setting
The table below lists the function of each jumper. The
related jumper settings are shown in the coming
sections.
Jumper Description
JP1 LCD power setting
JP2 Reserved
JP4 CMOS clear
JP3 COM2 RS-232/485 selection
JP5 COM2 RS-232/485 selection
JP6 COM2 RS-232/485 selection
JP7 CPU frequency setting
JP9 DiskOnChip 2000 address setting