PC-730/750 (6877, 6887) System Board Locations

PC 730/750 System Board


1 Power Connector (5 V)
2 Modem Ring (J9)
3 LAN wake-up (J14)
4 External ring wake-up (J13)
5 Password Jumper (CMOS Clear) (J15)
6 Auxiliary Power (J16)
7 On/Off Switch (J18)
8 Tamper Connector (J19)
9 Secondary IDE Connector
10 Primary IDE Connector
11 Diskette Connector
12 Tamper (reserved)
13 Battery
14 Voltage Regulator Connector (VRM)
15 Power Connector (3.3 V)
16 Switch set (SW1)
17 Processor Socket
18 Cache Memory Module Connector
19 Power LED Connector
20 Hard Disk Access LED Connector
21 Speaker Connector
22 DSP Audio Connector
23 DIMM/SIMM Connectors
24 VESA passthrough Connector
VESA Connector

25 Riser Connector
RISER Cards

26 Video Port
27 ECP/EPP Parallel Port
28 Serial (B) Port
29 Serial (A) Port
30 Mouse Port
31 Keyboard Port
32 Infrared Port


See > Memory Map and I/O Address Map (6877/87)

Processor Speed Switch Settings SW1 1-4

Speed SW1-1 SW1-2 SW1-3 SW1-4
75 MHz Off Off On On
90 MHz Off Off On Off
100 MHz Off Off Off On
120 MHz On Off On Off
133 MHz On Off Off On
150 MHz On On On Off
166 MHz On On Off On


Additional Switch Settings SW1 5-6

Description SW1-5 SW1-6
Administrator
Password
Enabled
On (D) N/A
Administrator
Password
Disabled
Off N/A
Normal
Diskette
Operation
N/A Off (D)
Read-Only
Diskette
Operation
N/A On


Jumper Settings

Jumper Setting Description
J15 1-2 (D) Password Enabled
J15 2-3 Password Disabled


System Board Memory Configurations

These are the recommended combinations of memory-module kits. Each bank must contain a matched pair of SIMMs having the same size and speed.

Bank 2 holds DIMM memory modules. Bank 0 and Bank 1 hold matched-pair SIMM memory modules. The banks are filled according to the following memory table. When installing SIMM memory, a matched-pair is first installed into Bank 0, and then into Bank 1.

  Only memory modules with a max. height of no more than 30.5mm (1.2 inch) can be installed on the Type 6877, 6887 system board.
See also Memory Matrix

SIMM Speed Memory-Module
Size
SIMM 60 ns 4 MB, 8 MB, 16 MB, 32 MB
DIMM 60 ns 8 MB, 16 MB, 32 MB, 64 MB

Total
Memory
Bank 0
SIMM 3,4
Bank 1
SIMM 1,2
Bank 2
DIMM
16 MB - - 16
16 MB 4-4 4-4 -
24 MB - 4-4 16
32 MB - - 32
32 MB 8-8 8-8 -
40 MB 4-4 8-8 16
40 MB - 4-4 32
48 MB 4-4 4-4 32
64 MB 8-8 8-8 32
72 MB 4-4 16-16 32
80 MB 8-8 16-16 32
96 MB 16-16 16-16 32
128 MB 16-16 32-32 32


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