Specifications

PC/II+p Board Technical Reference Manual 21
MT002615 ©1999-2001, Megatel Computer Corporation
4 Settings
4.1 Jumper Settings – Cpu Type and Clock Frequencies
Refer to Section 6.2 for the Component Placement – Top Side diagram. All jumpers are normally on the TOP
side of the board. This table applies only to jumpers J003, J004, J005, and J006. These jumpers are
populated as required by the processor option that you select. If 'no processor installed' is selected for the
processor option, the user should install the processor and set these jumpers as indicated in the table which
follows.
Please READ the notes at the end of this table.
Table 1 Jumper Settings – Cpu Type and Clock Frequencies
J003 J004 J005 J006 CPU
CORE
(MHz)
LOCAL
BUS
(MHz)
PCI
BUS
(MHz)
SUPPORTED PROCESSOR
open-x open open open 166.6 66.6 33.3 AMD K6-2E/166
closed closed closed open-x 166.6 66.6 33.3 INTEL FV-80503CSM-66/166 (SL27X)
open closed closed open-x 266.6 66.6 33.3 INTEL FV-80503CSM-66/266 (SL274)
All other combinations Not Supported Reserved
NOTES:
(0) This table is preliminary; Contact Megatel to obtain a list of supported processors.
(1) Terminology used in table above:
open: shunt not installed
open-x: shunt normally not installed, or jumper may not be populated
closed: shunt installed
(2) Not all models or frequencies, that are supported by some of the processors, are supported by the
PC/II+p.
(3) The board will be shipped with jumpers specified above unless a custom processor or no processor is
ordered, in which case the jumpers should also be specified when the board is ordered. If you require
additional assistance in that case, please contact Megatel Engineering.
(4) Please be forewarned of the following:
– Megatel recommends you use ONLY a supported processor and a supported combination of
jumpers.
– The board must be equipped with a heatsink fan combination, or be externally cooled using a cross-
flow type of cooling arrangement which is appropriate for BOTH the speed of the host bus and Cpu
frequency selected, AND the environment within which the board is operating. Please specify the
intended operating speed range of the board to megatel when ordering this board to ensure that the
board is equipped with the appropriate heatsink fan combination. Do NOT operate the Cpu and/or Bus at
a speed beyond which it was designed to be operated and within the ranges indicated as Reserved.
– Before any of the Clock Frequencies jumpers are changed, ensure that the board is being supplied with
sufficient power to accommodate the increased speed of the Host Local Bus and the CPU Processor. Do
NOT operate the CPU and/or Bus at a speed beyond which it was design to be operated and within the
ranges indicated as Reserved.