PC 330-486, PC 350-486 Motherboard Settings and Configuration

IBM CORPORATION

PC 330-486, PC 350-486

Processor
80486SX/486 Overdrive/80486DX/80486DX2/80486DX4/P24T
Processor Speed
20/25/33/40/50(internal)/50/66(internal)/75(internal)/ 100(internal)MHz
Chip Set
Unidentified
Video Chip Set
None
Maximum Onboard Memory
128MB
Maximum Video Memory
Unidentified
Cache
128/256KB
BIOS
Unidentified
Dimensions
330mm x 218mm
I/O Options
32-bit VESA/PCI local bus slot, floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2),VESA feature connector, VGA port, riser slot, VRM connector
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
Power LED
CN1
IDE interface 2
J10
IDE interface LED
CN2
VESA feature connector
J14
PS/2 mouse port
J2
Speaker
J27
Serial port 1
J3
On/off switch connector
J29
Serial port 2
J4
On/off switch power supply connector
J30
Parallel port
J5
Riser slot
SL1
VGA port
J6
32-bit VESA/PCI local bus slot
SL2
Floppy drive interface
J7
VRM connector
VRM
IDE interface 1
J9

USER CONFIGURABLE SETTINGS
Function
Label
Position
»
Flash BIOS write protect disabled
J13
Pins 2 & 3 closed

Flash BIOS write protect enabled
J13
Pins 1 & 2 closed
»
On board video enabled
J15
Pins 1 & 2 closed

On board video disabled
J15
Pins 2 & 3 closed
»
Factory configured - do not alter
JP2
Unidentified
»
Modem answers on ring
JP5
Pins 2 & 3 closed

Modem does not answer on ring
JP5
Pins 1 & 2 closed
»
Factory configured - do not alter
JP11
Unidentified
»
PS/2 mouse enabled
JP12
Closed

PS/2 mouse disabled
JP12
Open
»
CMOS memory normal operation
JP14
Pins 1 & 2 closed

CMOS memory clear
JP14
Pins 2 & 3 closed
»
VGA IRQ9 enabled
JP15
Closed

VGA IRQ9 disabled
JP15
Open
»
Floppy drive write protect disabled
WP
Open

Floppy drive write protect enabled
WP
Closed

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
4MB
(1) 1M x 32
None
None
None
8MB
(1) 1M x 32
(1) 1M x 32
None
None
8MB
(1) 2M x 32
None
None
None
12MB
(1) 1M x 32
(1) 1M x 32
(1) 1M x 32
None
12MB
(1) 1M x 32
(1) 2M x 32
None
None
16MB
(1) 4M x 32
None
None
None
16MB
(1) 1M x 32
(1) 1M x 32
(1) 2M x 32
None
16MB
(1) 2M x 32
(1) 2M x 32
None
None
16MB
(1) 1M x 32
(1) 1M x 32
(1) 1M x 32
(1) 1M x 32
20MB
(1) 1M x 32
(1) 2M x 32
(1) 2M x 32
None
20MB
(1) 1M x 32
(1) 4M x 32
None
None

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
Bank 3
24MB
(1) 2M x 32
(1) 2M x 32
(1) 2M x 32
None
24MB
(1) 1M x 32
(1) 1M x 32
(1) 2M x 32
(1) 2M x 32
24MB
(1) 1M x 32
(1) 1M x 32
(1) 4M x 32
None
28MB
(1) 1M x 32
(1) 2M x 32
(1) 2M x 32
(1) 2M x 32
28MB
(1) 1M x 32
(1) 1M x 32
(1) 4M x 32
(1) 1M x 32
32MB
(1) 4M x 32
(1) 4M x 32
None
None
32MB
(1) 8M x 32
None
None
None
32MB
(1) 2M x 32
(1) 2M x 32
(1) 4M x 32
None
32MB
(1) 2M x 32
(1) 2M x 32
(1) 2M x 32
(1) 2M x 32
36MB
(1) 1M x 32
(1) 4M x 32
(1) 4M x 32
None
40MB
(1) 1M x 32
(1) 1M x 32
(1) 8M x 32
None
40MB
(1) 1M x 32
(1) 1M x 32
(1) 4M x 32
(1) 4M x 32
48MB
(1) 4M x 32
(1) 4M x 32
(1) 4M x 32
None
48MB
(1) 2M x 32
(1) 2M x 32
(1) 8M x 32
None
48MB
(1) 2M x 32
(1) 2M x 32
(1) 4M x 32
(1) 4M x 32
52MB
(1) 1M x 32
(1) 4M x 32
(1) 4M x 32
(1) 4M x 32
64MB
(1) 8M x 32
(1) 8M x 32
None
None
64MB
(1) 4M x 32
(1) 4M x 32
(1) 8M x 32
None
64MB
(1) 4M x 32
(1) 4M x 32
(1) 4M x 32
(1) 4M x 32
68MB
(1) 1M x 32
(1) 8M x 32
(1) 4M x 32
(1) 4M x 32
72MB
(1) 1M x 32
(1) 1M x 32
(1) 8M x 32
(1) 8M x 32
80MB
(1) 2M x 32
(1) 2M x 32
(1) 8M x 32
(1) 8M x 32
84MB
(1) 1M x 32
(1) 8M x 32
(1) 8M x 32
(1) 4M x 32
96MB
(1) 8M x 32
(1) 8M x 32
(1) 8M x 32
None
96MB
(1) 4M x 32
(1) 4M x 32
(1) 8M x 32
(1) 8M x 32
100MB
(1) 1M x 32
(1) 8M x 32
(1) 8M x 32
(1) 8M x 32
128MB
(1) 8M x 32
(1) 8M x 32
(1) 8M x 32
(1) 8M x 32
Note: Board also accepts x 36 SIMMs.

CACHE CONFIGURATION
Size
Bank 0
Bank 1
TAG
128KB
(4) 32K x 8
None
(1) 32K x 8
256KB
(4) 32K x 8
(4) 32K x 8
(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size
J16
J17
J38
128KB
Pins 2 & 3 closed
Open
Open
256KB
Pins 1 & 2 closed
Closed
Open

CPU SPEED SELECTION
Speed
J35
J36
J37
20MHz
Closed
Open
Open
25MHz
Open
Closed
Closed
33MHz
Open
Closed
Open
40MHz
Open
Open
Closed
50iMHz
Open
Closed
Closed
50MHz
Open
Open
Open
66iMHz
Open
Closed
Open
75iMHz
Open
Closed
Closed
100iMHz
Open
Closed
Open

CPU TYPE SELECTION
Type
J23
J24
80486SX
Pins 1 & 2 closed
Open
486 Overdrive
Pins 2 & 3 closed
Open
80486DX
Pins 2 & 3 closed
Open
80486DX2
Pins 2 & 3 closed
Open
80486DX4
Pins 2 & 3 closed
Open
P24T
Pins 2 & 3 closed
Closed

CPU MULTIPLIER SELECTION (80486DX4 ONLY)
Multiplier
JP10
Other multiplier
Pins 1 & 2 closed
2x
Pins 3 & 4 closed
3x
Open

LOCAL BUS SELECTION ON RISER SLOT
Setting
JP3
JP4
JP7
JP13
VESA local bus
Pins 1 & 2 closed
Pins 1 & 2 closed
Open
Closed
PCI local bus
Pins 2 & 3 closed
Pins 2 & 3 closed
Closed
Open

DMA CHANNEL SELECTION
Channel
JP8
JP9
1
Pins 2 & 3 closed
Pins 2 & 3 closed
3
Pins 1 & 2 closed
Pins 1 & 2 closed

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PC 330-486, PC 350-486 Motherboard Settings and Configuration

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Processor	80486SX/486 Overdrive/80486DX/80486DX2/80486DX4/P24T
Processor Speed	20/25/33/40/50(internal)/50/66(internal)/75(internal)/ 100(internal)MHz
Chip Set	Unidentified
Video Chip Set	None
Maximum Onboard Memory	128MB
Maximum Video Memory	Unidentified
Cache	128/256KB
BIOS	Unidentified
Dimensions	330mm x 218mm
I/O Options	32-bit VESA/PCI local bus slot, floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2),VESA feature connector, VGA port, riser slot, VRM connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED	CN1	IDE interface 2	J10
IDE interface LED	CN2	VESA feature connector	J14
PS/2 mouse port	J2	Speaker	J27
Serial port 1	J3	On/off switch connector	J29
Serial port 2	J4	On/off switch power supply connector	J30
Parallel port	J5	Riser slot	SL1
VGA port	J6	32-bit VESA/PCI local bus slot	SL2
Floppy drive interface	J7	VRM connector	VRM
IDE interface 1	J9

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Flash BIOS write protect disabled	J13	Pins 2 & 3 closed
	Flash BIOS write protect enabled	J13	Pins 1 & 2 closed
»	On board video enabled	J15	Pins 1 & 2 closed
	On board video disabled	J15	Pins 2 & 3 closed
»	Factory configured - do not alter	JP2	Unidentified
»	Modem answers on ring	JP5	Pins 2 & 3 closed
	Modem does not answer on ring	JP5	Pins 1 & 2 closed
»	Factory configured - do not alter	JP11	Unidentified
»	PS/2 mouse enabled	JP12	Closed
	PS/2 mouse disabled	JP12	Open
»	CMOS memory normal operation	JP14	Pins 1 & 2 closed
	CMOS memory clear	JP14	Pins 2 & 3 closed
»	VGA IRQ9 enabled	JP15	Closed
	VGA IRQ9 disabled	JP15	Open
»	Floppy drive write protect disabled	WP	Open
	Floppy drive write protect enabled	WP	Closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
4MB	(1) 1M x 32	None	None	None
8MB	(1) 1M x 32	(1) 1M x 32	None	None
8MB	(1) 2M x 32	None	None	None
12MB	(1) 1M x 32	(1) 1M x 32	(1) 1M x 32	None
12MB	(1) 1M x 32	(1) 2M x 32	None	None
16MB	(1) 4M x 32	None	None	None
16MB	(1) 1M x 32	(1) 1M x 32	(1) 2M x 32	None
16MB	(1) 2M x 32	(1) 2M x 32	None	None
16MB	(1) 1M x 32	(1) 1M x 32	(1) 1M x 32	(1) 1M x 32
20MB	(1) 1M x 32	(1) 2M x 32	(1) 2M x 32	None
20MB	(1) 1M x 32	(1) 4M x 32	None	None

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
24MB	(1) 2M x 32	(1) 2M x 32	(1) 2M x 32	None
24MB	(1) 1M x 32	(1) 1M x 32	(1) 2M x 32	(1) 2M x 32
24MB	(1) 1M x 32	(1) 1M x 32	(1) 4M x 32	None
28MB	(1) 1M x 32	(1) 2M x 32	(1) 2M x 32	(1) 2M x 32
28MB	(1) 1M x 32	(1) 1M x 32	(1) 4M x 32	(1) 1M x 32
32MB	(1) 4M x 32	(1) 4M x 32	None	None
32MB	(1) 8M x 32	None	None	None
32MB	(1) 2M x 32	(1) 2M x 32	(1) 4M x 32	None
32MB	(1) 2M x 32	(1) 2M x 32	(1) 2M x 32	(1) 2M x 32
36MB	(1) 1M x 32	(1) 4M x 32	(1) 4M x 32	None
40MB	(1) 1M x 32	(1) 1M x 32	(1) 8M x 32	None
40MB	(1) 1M x 32	(1) 1M x 32	(1) 4M x 32	(1) 4M x 32
48MB	(1) 4M x 32	(1) 4M x 32	(1) 4M x 32	None
48MB	(1) 2M x 32	(1) 2M x 32	(1) 8M x 32	None
48MB	(1) 2M x 32	(1) 2M x 32	(1) 4M x 32	(1) 4M x 32
52MB	(1) 1M x 32	(1) 4M x 32	(1) 4M x 32	(1) 4M x 32
64MB	(1) 8M x 32	(1) 8M x 32	None	None
64MB	(1) 4M x 32	(1) 4M x 32	(1) 8M x 32	None
64MB	(1) 4M x 32	(1) 4M x 32	(1) 4M x 32	(1) 4M x 32
68MB	(1) 1M x 32	(1) 8M x 32	(1) 4M x 32	(1) 4M x 32
72MB	(1) 1M x 32	(1) 1M x 32	(1) 8M x 32	(1) 8M x 32
80MB	(1) 2M x 32	(1) 2M x 32	(1) 8M x 32	(1) 8M x 32
84MB	(1) 1M x 32	(1) 8M x 32	(1) 8M x 32	(1) 4M x 32
96MB	(1) 8M x 32	(1) 8M x 32	(1) 8M x 32	None
96MB	(1) 4M x 32	(1) 4M x 32	(1) 8M x 32	(1) 8M x 32
100MB	(1) 1M x 32	(1) 8M x 32	(1) 8M x 32	(1) 8M x 32
128MB	(1) 8M x 32	(1) 8M x 32	(1) 8M x 32	(1) 8M x 32
Note: Board also accepts x 36 SIMMs.

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
128KB	(4) 32K x 8	None	(1) 32K x 8
256KB	(4) 32K x 8	(4) 32K x 8	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	J16	J17	J38
128KB	Pins 2 & 3 closed	Open	Open
256KB	Pins 1 & 2 closed	Closed	Open

CPU SPEED SELECTION
Speed	J35	J36	J37
20MHz	Closed	Open	Open
25MHz	Open	Closed	Closed
33MHz	Open	Closed	Open
40MHz	Open	Open	Closed
50iMHz	Open	Closed	Closed
50MHz	Open	Open	Open
66iMHz	Open	Closed	Open
75iMHz	Open	Closed	Closed
100iMHz	Open	Closed	Open

CPU TYPE SELECTION
Type	J23	J24
80486SX	Pins 1 & 2 closed	Open
486 Overdrive	Pins 2 & 3 closed	Open
80486DX	Pins 2 & 3 closed	Open
80486DX2	Pins 2 & 3 closed	Open
80486DX4	Pins 2 & 3 closed	Open
P24T	Pins 2 & 3 closed	Closed

CPU MULTIPLIER SELECTION (80486DX4 ONLY)
Multiplier	JP10
Other multiplier	Pins 1 & 2 closed
2x	Pins 3 & 4 closed
3x	Open

LOCAL BUS SELECTION ON RISER SLOT
Setting	JP3	JP4	JP7	JP13
VESA local bus	Pins 1 & 2 closed	Pins 1 & 2 closed	Open	Closed
PCI local bus	Pins 2 & 3 closed	Pins 2 & 3 closed	Closed	Open

DMA CHANNEL SELECTION
Channel	JP8	JP9
1	Pins 2 & 3 closed	Pins 2 & 3 closed
3	Pins 1 & 2 closed	Pins 1 & 2 closed