64XX System Board
1 Video Port
2 Parallel Port
3 Serial Port (Comm B)
4 Serial Port (Comm A)
5 Mouse Port
6 Keyboard Port
7 Battery
8 ISA-Riser Connector
9 IRQ1 / IRQ2 (Mouse disable) (J15)
10 Power Supply Connector
Power Connector/Voltage
11 Diskette Drive Cable Connector
12 Hard Disk Drive Cable Connector
13 Hard Disk Drive Cable Connector
14 Diskette Write-Protect Jumper (J10)
15 VESA-Riser Connector Extension
16 Cache Tag RAM
17 Fan Power Connector
18 Processor Socket
19 SL to non SL Processor Jumper (J6)
20 Overdrive / DX Jumper (J7)
21 DX4 - Voltage Regulator (VRM) Connector
22 Power-on-LED
23 Hard Disk LED
24 Speaker
25 128/256KB External Cache Connectors
26 Memory Module Conn. Bank 1
27 Memory Module Conn. Bank 2
28 Memory Module Conn. Bank 3
29 Memory Module Conn. Bank 4
30 No or 128KB Cache Jumper (to rear) (J22)
31 256KB Cache Jumper (to front) (J21)
32 Cache Tag RAM
33 VESA / PCI Jumper (VESA to rear) (J19)
34 VESA / PCI Jumper (VESA to rear) (J20)
35 VESA / PCI Jumper (VESA to rear) (J35)
36 Frequency Synthesizer (up Speed) (J18)
37 Frequency Synthesizer (uP Speed) (J17)
38 Video Enable/Disable
39 Extended Video Memory Connector
40 Video Feature Connector
VESA Connector
41 Extended Video Memory Connector
NOTE: Systemboard-Jumper PIN-number
o Pin-1 .... Rear
o Pin-2
o Pin-3 .... Front
Click here -> ValuePoint Memory Table
Please see the LEGAL - Trademark notice.
Speed
J17
J18
SX-25
SX-33
SX2-50
DX-33
DX2-50
DX2-66
DX4-100
25 MHz
1-2 3
1 2-3
X
X
X
33 MHz
1-2 3
1-2 3
X
X
X
40 MHz
1 2-3
1 2-3
50 MHz
1 2-3
1-2 3
X
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