PC-300/350 Pentium® 75/90/100MHz (65x6) System Board Locations
65x6 (PC 300) System Board
1 Video Display Connector
2 Parallel Port Connector
3 Serial Port Connector
4 BIOS Flash Jumper (J5J1)
5 Serial Port Connector
6 Mouse Port Connector
7 Keyboard Connector
8 PCI/ISA Riser Connector
730/750 Series RISER Cards
9 Primary (outer) IDE Connectors
9 Secondary (inner) IDE Connectors
10 Power Connector
Power Connector (Voltages)
11 Diskette Drive Connector (J9D1)
12 Processor VRE Enable (J9C1)
13 Memory Module Connectors
14 FAN - Connector
15 RTC Battery
16 512KB Cache Memory Connectors
17 Processor Connector
18 Hard Disk / Power LED
18a Front Panel I/O Connector (J2A2)
(Connectors are not used)
- SPKR
- FAN
- IR
- SL
19 Cache Tag Memory Connector
20 Front Panel I/O Connector (J1D1)
(Connectors are not used)
- RST
- PWR
- LOCK
- HDD
- TURBO
21 Configuration Switch Block (SW1)
- L2 Cache
- CMOS settings
- Power on password
- Processor type
22 Video Feature Connector
VESA Connector
23 2MB Video Memory Connectors
L2 Cache Size - SW1 Switch 1,2
| L2 Cache Size |
Switch 1 |
Switch 2 |
| 0KB |
On |
n/a |
| 256KB |
Off |
Off |
| 512KB |
Off |
On |
CMOS Setup Utility - SW1 Switch 3, 4, 5
| Description |
Switch 3 |
Switch 4 |
Switch 5 |
| Power-On Password Enabled |
Off (D) |
Off |
Off |
| Power-On Password Reset |
On (D) |
Off |
Off |
| Normal CMOS Settings |
Off |
Off (D) |
Off |
| Reset CMOS Settings |
Off |
On |
Off |
Processor Type - SW1 Switch 6, 7, 8
| Processor |
Switch 6 |
Switch 7 |
Switch 8 |
| 50/75 MHz |
Off |
Off |
Off |
| 60/90 MHz |
Off |
On |
Off |
| 66/100 MHz |
Off |
Off |
On |
BIOS Flash Reset (J5J1)
| Jumper |
Position |
Description |
| J5J1 |
1-3 |
Normal (D) |
| J5J1 |
1-2 |
Reset |
ISA Bus Clock Speed Jumper (J5J1)
| CPU External Clock Speed |
ISA 1/6 Clock
Speed
Jumper 5-7 Not
Installed |
ISA 1/8 Clock
Speed
Jumper 5-7
Installed |
| 50/75 MHz |
8.33 MHz (D) |
6.25 MHz |
| 60/90 MHz |
10 MHz |
7.5 MHz (D) |
| 66/100 MHz |
11 MHz |
8.25 MHz |
Note J5J1's PINs 4, 6 and 8 are reserved
and should not be jumpered.
Processor VRE Enable (J9C1)
| Jumper |
Description |
| J9C1 1-3 (D) |
Standard Voltage Processor |
| J9C1 5-7 |
VRE Rated Processor |
The following table shows the recommended combinations of memory-module
kits. Each bank must contain a matched pair of SIMMs having the same size and speed.
Total
Memory |
Bank 0 |
Bank 1 |
| 8 MB |
4 MB |
- |
| 16 MB |
4 MB |
4 MB |
| 16 MB |
8 MB |
- |
| 24 MB |
4 MB |
8 MB |
| 24 MB |
8 MB |
4 MB |
| 32 MB |
8 MB |
8 MB |
| 32 MB |
16 MB |
- |
| 40 MB |
4 MB |
16 MB |
| 40 MB |
16 MB |
4 MB |
| 64 MB |
32 MB |
- |
| 72 MB |
4 MB |
32 MB |
| 72 MB |
32 MB |
4 MB |
| 80 MB |
8 MB |
32 MB |
| 80 MB |
32 MB |
8 MB |
| 128 MB |
32 MB |
32 MB |
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