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
Please see the LEGAL - Trademark notice.
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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