4820ST/T (250-5140) Motherboard Settings and Configuration

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4820ST/T (250-5140)

Processor
80486SX/80487SX/ODP486/ODPR486/80486DX/80486DX2
Processor Speed
20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set
Unidentified
Video Chip Set
None
Maximum Onboard Memory
64MB
Maximum Video Memory
None
Cache
None
BIOS
Unidentified
Dimensions
330mm x 218mm
I/O Options
Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2)
NPU Options
80487SX

CONNECTIONS
Purpose
Location
Purpose
Location
PS/2 mouse port
CN1
IDE interface
CN6
Serial port 1
CN2
Power indicator
J1
Serial port 2
CN3
IDE interface LED
J2
Parallel port
CN4
External battery
J3
Floppy drive interface
CN5
Front panel connector
J4

USER CONFIGURABLE SETTINGS
Function
Label
Position
»
CMOS memory normal operation
JP1
Open

CMOS memory clear
JP1
Closed
»
Monitor type select color
SW1/3
On

Monitor type select monochrome
SW1/3
Off
»
Factory configured - do not alter
SW1/4
Unidentified

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
Bank 3
1MB
(4) 256K x 9
None
None
None
2MB
(4) 256K x 9
(4) 256K x 9
None
None
3MB
(4) 256K x 9
(4) 256K x 9
(4) 256K x 9
None
4MB
(4) 256K x 9
(4) 256K x 9
(4) 256K x 9
(4) 256K x 9
4MB
(4) 1M x 9
None
None
None
5MB
(4) 256K x 9
(4) 1M x 9
None
None
6MB
(4) 256K x 9
(4) 256K x 9
(4) 1M x 9
None
8MB
(4) 1M x 9
(4) 1M x 9
None
None
9MB
(4) 1M x 9
(4) 1M x 9
(4) 256K x 9
None
10MB
(4) 256K x 9
(4) 256K x 9
(4) 1M x 9
(4) 1M x 9
12MB
(4) 1M x 9
(4) 1M x 9
(4) 1M x 9
None
16MB
(4) 1M x 9
(4) 1M x 9
(4) 1M x 9
(4) 1M x 9
16MB
(4) 4M x 9
None
None
None
17MB
(4) 256K x 9
(4) 4M x 9
None
None
18MB
(4) 256K x 9
(4) 256K x 9
(4) 4M x 9
None
20MB
(4) 1M x 9
(4) 4M x 9
None
None
24MB
(4) 1M x 9
(4) 1M x 9
(4) 4M x 9
None
32MB
(4) 4M x 9
(4) 4M x 9
None
None
33MB
(4) 4M x 9
(4) 4M x 9
(4) 256K x 9
None
34MB
(4) 256K x 9
(4) 256K x 9
(4) 4M x 9
(4) 4M x 9
36MB
(4) 4M x 9
(4) 4M x 9
(4) 1M x 9
None
40MB
(4) 1M x 9
(4) 1M x 9
(4) 4M x 9
(4) 4M x 9
48MB
(4) 4M x 9
(4) 4M x 9
(4) 4M x 9
None
64MB
(4) 4M x 9
(4) 4M x 9
(4) 4M x 9
(4) 4M x 9

CPU TYPE SELECTION
Type
Socket
SW1/1
SW1/2
80486SX
CPU
Off
Off
ODP486
CPU
On
On
ODP486
NPU
Off
Off
ODPR486
CPU
On
Off
80487SX
CPU
On
On
80487SX
NPU
Off
Off
80486DX
CPU
On
Off
80486DX2
CPU
On
Off

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4820ST/T (250-5140) Motherboard Settings and Configuration

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Processor	80486SX/80487SX/ODP486/ODPR486/80486DX/80486DX2
Processor Speed	20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set	Unidentified
Video Chip Set	None
Maximum Onboard Memory	64MB
Maximum Video Memory	None
Cache	None
BIOS	Unidentified
Dimensions	330mm x 218mm
I/O Options	Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2)
NPU Options	80487SX

CONNECTIONS
Purpose	Location	Purpose	Location
PS/2 mouse port	CN1	IDE interface	CN6
Serial port 1	CN2	Power indicator	J1
Serial port 2	CN3	IDE interface LED	J2
Parallel port	CN4	External battery	J3
Floppy drive interface	CN5	Front panel connector	J4

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	CMOS memory normal operation	JP1	Open
	CMOS memory clear	JP1	Closed
»	Monitor type select color	SW1/3	On
	Monitor type select monochrome	SW1/3	Off
»	Factory configured - do not alter	SW1/4	Unidentified

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(4) 256K x 9	None	None	None
2MB	(4) 256K x 9	(4) 256K x 9	None	None
3MB	(4) 256K x 9	(4) 256K x 9	(4) 256K x 9	None
4MB	(4) 256K x 9	(4) 256K x 9	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	None	None	None
5MB	(4) 256K x 9	(4) 1M x 9	None	None
6MB	(4) 256K x 9	(4) 256K x 9	(4) 1M x 9	None
8MB	(4) 1M x 9	(4) 1M x 9	None	None
9MB	(4) 1M x 9	(4) 1M x 9	(4) 256K x 9	None
10MB	(4) 256K x 9	(4) 256K x 9	(4) 1M x 9	(4) 1M x 9
12MB	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9	None
16MB	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	None	None	None
17MB	(4) 256K x 9	(4) 4M x 9	None	None
18MB	(4) 256K x 9	(4) 256K x 9	(4) 4M x 9	None
20MB	(4) 1M x 9	(4) 4M x 9	None	None
24MB	(4) 1M x 9	(4) 1M x 9	(4) 4M x 9	None
32MB	(4) 4M x 9	(4) 4M x 9	None	None
33MB	(4) 4M x 9	(4) 4M x 9	(4) 256K x 9	None
34MB	(4) 256K x 9	(4) 256K x 9	(4) 4M x 9	(4) 4M x 9
36MB	(4) 4M x 9	(4) 4M x 9	(4) 1M x 9	None
40MB	(4) 1M x 9	(4) 1M x 9	(4) 4M x 9	(4) 4M x 9
48MB	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9	None
64MB	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9	(4) 4M x 9

CPU TYPE SELECTION
Type	Socket	SW1/1	SW1/2
80486SX	CPU	Off	Off
ODP486	CPU	On	On
ODP486	NPU	Off	Off
ODPR486	CPU	On	Off
80487SX	CPU	On	On
80487SX	NPU	Off	Off
80486DX	CPU	On	Off
80486DX2	CPU	On	Off