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Appendix B Upgrading 43
CPU upgrading
This section tells how to upgrade the card's CPU. You can upgrade
your SBC-350A to a higher powered 486SLC-33 CPU at any time.
Simply remove the old 386SX CPU, install the new 486SLC-33
CPU and short/open the appropriate solder pads for the CPU type
and speed.
1. Disconnect power from the chassis and remove the CPU card.
Follow the instructions in the user's manual for your chassis.
You will also need to disconnect everything you connected in
Chapter 3, Connections.
2. If you are upgrading the CPU, remove any existing CPU from
the card. (See Chapter 1 for help locating the CPU position.)
3. Solder the new CPU onto the SBC-350A. Follow the instruc-
tions that came with the CPU.
4. Using a soldering iron, not too hot!, solder the pads CP1, CP2,
CP3, CP6 and CP7 open or closed. These pads will be open/
closed depending on the type of CPU installed. The following
table refers:
CP Configurations
CPU Type CP1 CP2 CP3 CP6 CP7
386SX-40 Open Open Open Open Short
486SLC-33 Short Short Short Short
Open
5. Reinstall the CPU card according to the instructions in
Chapter 2.
Installing PC/104 modules
The SBC-350A's PC/104 connectors give you the flexibility to
attach PC/104 expansion modules. These modules perform the
functions of traditional plug-in expansion cards, but save space and