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DigiBoard Intelligent Serial Communications Boards
EPROM Size Jumpers—J1 and J2
The I/O Mate (daughter card) has two jumpers, J1 and J2, which
indicate the size of the EPROM (see Figure 13 on page 27 for the
location of J1 and J2). These jumpers are set at the factory, and
should only be changed by the user when a customized EPROM is
installed. The default positions for J1 and J2 are pins 1 and 2
(the top two pins) connected. The following table gives the
possible settings for J1 and J2.
Table 4
COM/Xi EPROM Size Jumpers
EPROM Size
J1 Pins
J2 Pins
*8K
1 & 2
1 & 2
16K
1 & 2
1 & 2
32K
1 & 2
2 & 3
64K
2 & 3
2 & 3
* The default EPROM size is 8K.