PC 130/150-330/350 - 486 (6271/81 - 6571/73/81/83) System Board Locations

PC 330/350-486 System Board

  If you install an 586-OVERDRIVE Processor, another BIOS level is also needed !

1 Power Supply Connector (J8)
Power Connector (Voltages)

2 On/Off Switch Power Supply Conn.
3 Diskette drive write protect (JP1) 7
(WP = JP1 connected)

4 Diskette Drive Connector (J7)
5 Primary Hard Disk Drive Conn. (J9)
6 Modem Ring Detect jumper
7 Secondary Hard Disk Drive Conn. (J10)
8 Processor Socket
9 SX/DX CPU type sel. jumper (J24)
10 P24T CPU type sel. jumper (J23)
11 Local Bus Config. jumpers (JP3 JP4)
12 Processor Voltage Regulator (VRM) Connector
13 DX4 Clock sel. jumper (JP10)

14 Cache size sel. jumpers (J16 J17 J38)
(128KB = J16 to front / no J17)
(256KB or no cache = J16 to rear / J17 inst.)

15 VESA/PCI jumper (JP13)
16 128K Cache Memory Connectors
17 Cache Tag RAM Connector
18 Power LED Connector
19 Hard Disk Drive LED Connector
20 Speaker Connector /w enable jumper ((J27)

21 Memory Module Connector MEM 4 (J19)
22 Memory Module Connector MEM 3 (J20)
23 Memory Module Connector MEM 2 (J21)
24 Memory Module Connector MEM 1 (J22)

25 256K Cache Memory Connectors
26 VHIMEM jumper (JP11)
27 IRQ12 jumper (JP12)
(Close = Enable PS/2 Mouse)
(Open = Disable PS/2 Mouse)

28 IRQ9 for VGA jumper (JP15)
(2-3 Disable on board VGA)
(1-2 Enable on board VGA)

29 VESA feature Connector (J14)
VESA Connector

30 Power-On Password jumper (JP14)
(1-2 = Normal (D) / 2-3 = Discard CMOS Data)

31 Video jumper (J15)
(1-2 = Enable System Board VGA (D))
(2-3 = Disable System Board VGA)

32 Display Connector (J6)
33 Parallel Connector (J5)
34 Serial Connector COM2 (J4)

35 Flash jumper (J13)
(1-2 = Program Flash Disable (D))
(allow update = J13 to front 2-3)

36 Serial Connector COM1 (J3)
37 ISA riser Connector (J11)
730/750 Series RISER Cards

38 ECP DMA-sel. jumpers (JP8 JP9)
39 Mouse Connector (J2)
40 Keyboard Connector (J1)
41 Battery
42 VL riser Connector (J34)
43 On/Off Switch Connector
44 CPU Clock select (J35)
45 CPU Clock select (J36)
46 CPU Clock select (J37)

X = Jumper in place
(D) = factory setting

CPU Type Selection Jumper (J23 J24)

Processor	J23	J24
486SX (D)	1-2
486DX	2-3
P24T	2-3	X

CPU Clock Select Jumper (J35 J36 J37)

CPU MHz	J35	J36	J37
20 MHz	X
25 MHz (D)		X	X
33 MHz		X
40 MHz			X
50 MHz

Cache Size Selection (J16 J17 J38)

Size	J16	J17	J38
128-K	2-3
256-K	1-2	X
512-K	2-3	X	X

P24 Clock Selection (JP10)

JP10	1-2	3-4
Internal Clock -X3 (D)
Internal Clock -X2		X
Other Multiplier	X

Local Bus Configuration (JP3 JP4 JP13 JP7)

Selection	JP3	JP4	JP13	JP7
VESA Local BUS	1-2	1-2	X	X
PCI Local BUS	2-3	2-3

ECP DMA Selection (JP8 JP9)

Setting	JP8	JP9
DRQ3 (D)	1-2	1-2
DRQ1	2-3	2-3

Acceptable combinations of Memory Module Kits See Memory Matrix

Total Memory	MEM 1	MEM 2	MEM 3	MEM 4
4 MB	4 MB	-	-	-
8 MB	4 MB	4 MB	-	-
8 MB	8 MB	-	-	-
12 MB	4 MB	4 MB	4 MB	-
12 MB	4 MB	8 MB	-	-
16 MB	16 MB	-	-	-
16 MB	4 MB	4 MB	8 MB	-
16 MB	8 MB	8 MB	-	-
16 MB	4 MB	4 MB	4 MB	4 MB
20 MB	4 MB	8 MB	8 MB	-
20 MB	4 MB	16 MB	-	-
24 MB	8 MB	8 MB	8 MB	-
24 MB	4 MB	4 MB	8 MB	8 MB
24 MB	4 MB	4 MB	16 MB	-
28 MB	4 MB	8 MB	8 MB	8 MB
28 MB	4 MB	4 MB	16 MB	4 MB
32 MB	16 MB	16 MB	-	-
32 MB	32 MB	-	-	-
32 MB	8 MB	8 MB	16 MB	-
32 MB	8 MB	8 MB	8 MB	8 MB
36 MB	4 MB	16 MB	16 MB	-
40 MB	4 MB	4 MB	32 MB	-
40 MB	4 MB	4 MB	16 MB	16 MB
48 MB	16 MB	16 MB	16 MB	-
48 MB	8 MB	8 MB	32 MB	-
48 MB	8 MB	8 MB	16 MB	16 MB
52 MB	4 MB	16 MB	16 MB	16 MB
52 MB	32 MB	32 MB	-	-
64 MB	16 MB	16 MB	32 MB	-
64 MB	16 MB	16 MB	16 MB	16 MB
68 MB	4 MB	32 MB	16 MB	16 MB
72 MB	4 MB	4 MB	32 MB	32 MB
80 MB	8 MB	8 MB	32 MB	32 MB
84 MB	4 MB	32 MB	32 MB	16 MB
84 MB	32 MB	32 MB	32 MB	-
96 MB	16 MB	16 MB	32 MB	32 MB
100 MB	4 MB	32 MB	32 MB	32 MB
128 MB	32 MB	32 MB	32 MB	32 MB

Please see the LEGAL  -  Trademark notice.
Feel free - send a   for any BUG on this page found - Thank you.