OPEN SYSTEMS CWP Motherboard Settings and Configuration

Device Type	Mainboard
Processor	80486SX2/80486DX/80486DX2/80486DX4
Processor Speed	33/50(internal)/66(internal)/100(internal)MHz
Chip Set	Unidentified
Video Chip Set	Cirrus Logic
Maximum Onboard Memory	64MB
Maximum Video Memory	2MB
Cache	256KB
BIOS	Unidentified
Dimensions	254mm x 218mm
I/O Options	Ethernet connector, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port, riser slot, cache slot
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
LED, speaker	C1	VGA feature connector	CN7
3.3v power	C2	IDE interface 1	CN8
VGA port	CN1	Floppy drive interface	CN9
Ethernet connector	CN2	Smart port connector	CN10
PS/2 mouse port	CN3	BNC connector	CN11
Parallel port	CN4	Riser slot	SL1
Serial port 1	CN5	Cache slot	SL2
Serial port 2	CN6

SIMM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(1) 256K x 36	None
2MB	(1) 512K x 36	None
2MB	(1) 256K x 36	(1) 256K x 36
4MB	(1) 1M x 36	None
4MB	(1) 512K x 36	(1) 512K x 36
5MB	(1) 1M x 36	(1) 256K x 36
6MB	(1) 1M x 36	(1) 512K x 36
8MB	(1) 2M x 36	None
8MB	(1) 1M x 36	(1) 1M x 36
9MB	(1) 2M x 36	(1) 256K x 36
10MB	(1) 2M x 36	(1) 512K x 36
12MB	(1) 2M x 36	(1) 1M x 36
16MB	(1) 4M x 36	None
16MB	(1) 2M x 36	(1) 2M x 36
17MB	(1) 4M x 36	(1) 256K x 36
18MB	(1) 4M x 36	(1) 512K x 36
20MB	(1) 4M x 36	(1) 1M x 36
24MB	(1) 4M x 36	(1) 2M x 36
32MB	(1) 8M x 36	None
32MB	(1) 4M x 36	(1) 4M x 36
33MB	(1) 8M x 36	(1) 256K x 36
34MB	(1) 8M x 36	(1) 512K x 36
36MB	(1) 8M x 36	(1) 1M x 36
40MB	(1) 8M x 36	(1) 2M x 36
48MB	(1) 8M x 36	(1) 4M x 36
64MB	(1) 8M x 36	(1) 8M x 36

CACHE CONFIGURATION
Size	SL2
256KB	256KB module installed

VIDEO MEMORY CONFIGURATION
Size	Bank 0	Bank 1
1MB	1MB	None
2MB	1MB	(2) 256K x 16

CPU TYPE SELECTION
Type	J22	J23	J25	J26
80486SX2-33	1 & 2	1 & 3	1 & 3, 2 & 4	1 & 3, 2 & 4
80486DX2-50	1 & 2	2 & 4	1 & 3, 2 & 4	1 & 3, 2 & 4
80486DX2-66	1 & 2	1 & 3	1 & 3, 2 & 4	1 & 3, 2 & 4
80486DX4-100	1 & 2	1 & 3	3 & 5, 4 & 6	3 & 5, 4 & 6
Note: Pins designated should be in the closed position.

CPU TYPE SELECTION (CON’T)
Type	J27	J29	J31	J32
80486SX2-33	1 & 2	Open	1 & 2	Open
80486DX2-50	1 & 2	Open	1 & 2	Open
80486DX2-66	1 & 2	Open	1 & 2	Open
80486DX4-100	2 & 3	Open	1 & 2	Open
Note: Pins designated should be in the closed position.