CMC-820 Motherboard Settings and Configuration

Processor	80386DX
Processor Speed	10/20MHz
Chip Set	C & T
Max. onboard DRAM	16MB
Cache	None
BIOS	Unknown
Dimensions	330mm x 218mm
I/O Options	32-bit external memory cards (2)
NPU Options	80387DX/3167

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J1	Speaker	J11
Turbo LED	J7	Keylock	J12
Reset Switch	J10	32-bit system memory cards	S1 & S2

USER CONFIGURABLE SETTINGS
Function		Jumper/Switch	Position
»	BIOS type select 27128 or 27256	J3	pins 1 & 2 closed
	BIOS type select 27512	J3	pins 2 & 3 closed
»	Monitor type select color	J5	Closed
	Monitor type select monochrome	J5	Open
»	NPU enabled	J6	Closed
	NPU disabled	J6	Open
»	NPU type select Intel or 80387	J9	Closed
	NPU type select Weitek 3167	J9	Open

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
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
8MB	(4) 1M x 9	(4) 1M x 9	NONE	NONE
10MB	(4) 256K x 9	(4) 256K x 9	(4) 1M x 9	(4) 1M x 9
16MB	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9	(4) 1M x 9
Note:The numbering of bank 0 and bank 1 are located on the system board. Banks 2 & 3 are located on the external memory card.

CPU SPEED CONFIGURATION
Speed	J4	J8
10MHz	pins 2 & 3 closed	pins 1 & 2 closed
20MHz	pins 1 & 2 closed	pins 2 & 3 closed

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port DB-9	J101	Parallel port DB-9	J103
Serial port 10-pins header	J102	Parallel port 10-pins header	J104

I/O CONFIGURATION
Port	SW1/switch 1	SW1/switch 2	SW1/switch 3	SW1/switch 4
Serial port DB-9	On	Off	On	On
Serial port 10-pins header	On	On	On	Off
Parallel port DB-9	On	On	Off	On
Parallel port 10-pins header	Off	On	On	On