B815B (VER. B) Motherboard Settings and Configuration

MECER CORPORATION

B815B (VER. B)

Processor
80386DX/CX486DLC/CX486M6/80486SX/80486DX/80486DX2
Processor Speed
25/33/40/50(internal)/50/66(internal)MHz
Chip Set
Unidentified
Max. Onboard DRAM
128MB
Cache
128/256KB
BIOS
AMI
Dimensions
254mm x 218mm
I/O Options
None
NPU Options
80387DX

CONNECTIONS
Purpose
Location
Purpose
Location
Auxiliary keyboard connector
JP1
Turbo LED
JP27 pins 11 - 12
External battery
JP12
Turbo switch
JP27 pins 16 - 17
Power LED & keylock
JP27 pins 1 - 5
Reset switch
JP27 pins 19 - 20
Speaker
JP27 pins 7 - 10

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
Monitor type select monochrome
JP10
pins 1 & 2 closed

Monitor type select color
JP10
pins 2 & 3 closed
»
Battery enabled
JP13
Closed

Battery disabled
JP13
Open
»
Factory configured - do not alter
JP17
N/A
»
Factory configured - do not alter
JP18
N/A
»
Factory configured - do not alter
JP21
N/A
»
Factory configured - do not alter
JP22
N/A
»
Factory configured - do not alter
JP28
pins 1 & 2 closed
»
Factory configured - do not alter
JP33
pins 2 & 3 closed

DRAM CONFIGURATION
Size
Bank 0
Bank 1
1MB
(4) 256K x 9
NONE
2MB
(4) 256K x 9
(4) 256K x 9
4MB
(4) 1M x 9
NONE
5MB
(4) 256K x 9
(4) 1M x 9
8MB
(4) 1M x 9
(4) 1M x 9
16MB
(4) 4M x 9
NONE
17MB
(4) 256K x 9
(4) 4M x 9
20MB
(4) 1M x 9
(4) 4M x 9
32MB
(4) 4M x 9
(4) 4M x 9
64MB
(4) 16M x 9
NONE
65MB
(4) 256K x 9
(4) 16M x 9
68MB
(4) 1M x 9
(4) 16M x 9
80MB
(4) 4M x 9
(4) 16M x 9
128MB
(4) 16M x 9
(4) 16M x 9

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

CACHE JUMPER CONFIGURATION
Size
JP24
JP25
128KB
Open
pins 2 & 3 closed
256KB
Closed
pins 1 & 2 closed

CPU TYPE CONFIGURATION
Type
J1
JP2
JP3
JP4
80386DX-40 (80MHz)
6 & 8
2 & 3
1 & 2
2 & 3
CX486DLC-40 (80MHz)
6 & 8
2 & 3
2 & 3
2 & 3
CX486M6-33 (33MHz)
5 & 7
2 & 3
2 & 3
1 & 2
CX486M6-33 (66MHz)
1 & 2
2 & 3
2 & 3
1 & 2
CX486M6-40 (40MHz)
1 & 2, 3 & 4
2 & 3
2 & 3
1 & 2
CX486M6-33 (33MHz) C6
5 & 7
2 & 3
2 & 3
1 & 2
CX486M6-33 (66MHz) C6
1 & 2
2 & 3
2 & 3
1 & 2
CX486M6-40 (40MHz) C6
1 & 2, 3 & 4
2 & 3
2 & 3
1 & 2
80486SX-25 (25MHz)
3 & 4, 5 & 7
1 & 2
2 & 3
2 & 3
80486SX-25 (50MHz)
3 & 4
1 & 2
2 & 3
2 & 3
80486SX-33 (33MHz)
5 & 7
1 & 2
2 & 3
2 & 3
80486SX-33 (66MHz)
1 & 2
1 & 2
2 & 3
2 & 3
80486DX-33 (33MHz)
5 & 7
1 & 2
2 & 3
2 & 3
80486DX-33 (66MHz)
1 & 2
1 & 2
2 & 3
2 & 3
80486DX-40 (40MHz)
1 & 2, 3 & 4
1 & 2
2 & 3
2 & 3
80486DX-50 (50MHz)
3 & 4
1 & 2
2 & 3
2 & 3
80486DX2-50 (25MHz)
3 & 4
1 & 2
2 & 3
2 & 3
80486DX2-50 (50MHz)
3 & 4, 5 & 7
1 & 2
2 & 3
2 & 3
80486DX2-66 (33MHz)
5 & 7
1 & 2
2 & 3
2 & 3
80486DX2-66 (66MHz)
1 & 2
1 & 2
2 & 3
2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type
JP11
JP14
JP15
JP16
JP19
80386DX-40 (80MHz)
1 & 2
1 & 2
1 & 2
2 & 3
2 & 3
CX486DLC-40 (80MHz)
1 & 2
2 & 3
1 & 2
2 & 3
2 & 3
CX486M6-33 (33MHz)
2 & 3
2 & 3
Open
1 & 2
1 & 2
CX486M6-33 (66MHz)
1 & 2
2 & 3
Open
1 & 2
2 & 3
CX486M6-40 (40MHz)
2 & 3
2 & 3
Open
1 & 2
1 & 2
CX486M6-33 (33MHz) C6
2 & 3
2 & 3
1 & 2
2 & 3
1 & 2
CX486M6-33 (66MHz) C6
1 & 2
2 & 3
1 & 2
2 & 3
2 & 3
CX486M6-40 (40MHz) C6
2 & 3
2 & 3
1 & 2
2 & 3
1 & 2
80486SX-25 (25MHz)
2 & 3
2 & 3
Open
1 & 2
1 & 2
80486SX-25 (50MHz)
1 & 2
2 & 3
Open
1 & 2
2 & 3
80486SX-33 (33MHz)
2 & 3
2 & 3
Open
1 & 2
1 & 2
80486SX-33 (66MHz)
1 & 2
2 & 3
Open
1 & 2
2 & 3
80486DX-33 (33MHz)
2 & 3
2 & 3
1 & 2
2 & 3
1 & 2
80486DX-33 (66MHz)
1 & 2
2 & 3
1 & 2
2 & 3
2 & 3
80486DX-40 (40MHz)
2 & 3
2 & 3
1 & 2
2 & 3
1 & 2
80486DX-50 (50MHz)
2 & 3
2 & 3
1 & 2
2 & 3
1 & 2
80486DX2-50 (25MHz)
2 & 3
2 & 3
1 & 2
2 & 3
1 & 2
80486DX2-50 (50MHz)
2 & 3
2 & 3
1 & 2
2 & 3
1 & 2
80486DX2-66 (33MHz)
2 & 3
2 & 3
1 & 2
2 & 3
1 & 2
80486DX2-66 (66MHz)
1 & 2
2 & 3
1 & 2
2 & 3
2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type
JP29
JP30
JP31
JP32
JP34
80386DX-40 (80MHz)
Open
Open
Closed
Closed
Open
CX486DLC-40 (80MHz)
Open
Open
Closed
Closed
Closed
CX486M6-33 (33MHz)
Closed
Closed
Open
Open
Open
CX486M6-33 (66MHz)
Closed
Closed
Open
Open
Open
CX486M6-40 (40MHz)
Closed
Closed
Open
Open
Open
CX486M6-33 (33MHz) C6
Open
Open
Closed
Closed
Open
CX486M6-33 (66MHz) C6
Open
Open
Closed
Closed
Open
CX486M6-40 (40MHz) C6
Open
Open
Closed
Closed
Open
80486SX-25 (25MHz)
Open
Open
Closed
Closed
Open
80486SX-25 (50MHz)
Open
Open
Closed
Closed
Open
80486SX-33 (33MHz)
Open
Open
Closed
Closed
Open
80486SX-33 (66MHz)
Open
Open
Closed
Closed
Open
80486DX-33 (33MHz)
Open
Open
Closed
Closed
Open
80486DX-33 (66MHz)
Open
Open
Closed
Closed
Open
80486DX-40 (40MHz)
Open
Open
Closed
Closed
Open
80486DX-50 (50MHz)
Open
Open
Closed
Closed
Open
80486DX2-50 (25MHz)
Open
Open
Closed
Closed
Open
80486DX2-50 (50MHz)
Open
Open
Closed
Closed
Open
80486DX2-66 (33MHz)
Open
Open
Closed
Closed
Open
80486DX2-66 (66MHz)
Open
Open
Closed
Closed
Open

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B815B (VER. B) Motherboard Settings and Configuration

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Processor	80386DX/CX486DLC/CX486M6/80486SX/80486DX/80486DX2
Processor Speed	25/33/40/50(internal)/50/66(internal)MHz
Chip Set	Unidentified
Max. Onboard DRAM	128MB
Cache	128/256KB
BIOS	AMI
Dimensions	254mm x 218mm
I/O Options	None
NPU Options	80387DX

CONNECTIONS
Purpose	Location	Purpose	Location
Auxiliary keyboard connector	JP1	Turbo LED	JP27 pins 11 - 12
External battery	JP12	Turbo switch	JP27 pins 16 - 17
Power LED & keylock	JP27 pins 1 - 5	Reset switch	JP27 pins 19 - 20
Speaker	JP27 pins 7 - 10

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select monochrome	JP10	pins 1 & 2 closed
	Monitor type select color	JP10	pins 2 & 3 closed
»	Battery enabled	JP13	Closed
	Battery disabled	JP13	Open
»	Factory configured - do not alter	JP17	N/A
»	Factory configured - do not alter	JP18	N/A
»	Factory configured - do not alter	JP21	N/A
»	Factory configured - do not alter	JP22	N/A
»	Factory configured - do not alter	JP28	pins 1 & 2 closed
»	Factory configured - do not alter	JP33	pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(4) 256K x 9	NONE
2MB	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	NONE
5MB	(4) 256K x 9	(4) 1M x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
17MB	(4) 256K x 9	(4) 4M x 9
20MB	(4) 1M x 9	(4) 4M x 9
32MB	(4) 4M x 9	(4) 4M x 9
64MB	(4) 16M x 9	NONE
65MB	(4) 256K x 9	(4) 16M x 9
68MB	(4) 1M x 9	(4) 16M x 9
80MB	(4) 4M x 9	(4) 16M x 9
128MB	(4) 16M x 9	(4) 16M x 9

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

CACHE JUMPER CONFIGURATION
Size	JP24	JP25
128KB	Open	pins 2 & 3 closed
256KB	Closed	pins 1 & 2 closed

CPU TYPE CONFIGURATION
Type	J1	JP2	JP3	JP4
80386DX-40 (80MHz)	6 & 8	2 & 3	1 & 2	2 & 3
CX486DLC-40 (80MHz)	6 & 8	2 & 3	2 & 3	2 & 3
CX486M6-33 (33MHz)	5 & 7	2 & 3	2 & 3	1 & 2
CX486M6-33 (66MHz)	1 & 2	2 & 3	2 & 3	1 & 2
CX486M6-40 (40MHz)	1 & 2, 3 & 4	2 & 3	2 & 3	1 & 2
CX486M6-33 (33MHz) C6	5 & 7	2 & 3	2 & 3	1 & 2
CX486M6-33 (66MHz) C6	1 & 2	2 & 3	2 & 3	1 & 2
CX486M6-40 (40MHz) C6	1 & 2, 3 & 4	2 & 3	2 & 3	1 & 2
80486SX-25 (25MHz)	3 & 4, 5 & 7	1 & 2	2 & 3	2 & 3
80486SX-25 (50MHz)	3 & 4	1 & 2	2 & 3	2 & 3
80486SX-33 (33MHz)	5 & 7	1 & 2	2 & 3	2 & 3
80486SX-33 (66MHz)	1 & 2	1 & 2	2 & 3	2 & 3
80486DX-33 (33MHz)	5 & 7	1 & 2	2 & 3	2 & 3
80486DX-33 (66MHz)	1 & 2	1 & 2	2 & 3	2 & 3
80486DX-40 (40MHz)	1 & 2, 3 & 4	1 & 2	2 & 3	2 & 3
80486DX-50 (50MHz)	3 & 4	1 & 2	2 & 3	2 & 3
80486DX2-50 (25MHz)	3 & 4	1 & 2	2 & 3	2 & 3
80486DX2-50 (50MHz)	3 & 4, 5 & 7	1 & 2	2 & 3	2 & 3
80486DX2-66 (33MHz)	5 & 7	1 & 2	2 & 3	2 & 3
80486DX2-66 (66MHz)	1 & 2	1 & 2	2 & 3	2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type	JP11	JP14	JP15	JP16	JP19
80386DX-40 (80MHz)	1 & 2	1 & 2	1 & 2	2 & 3	2 & 3
CX486DLC-40 (80MHz)	1 & 2	2 & 3	1 & 2	2 & 3	2 & 3
CX486M6-33 (33MHz)	2 & 3	2 & 3	Open	1 & 2	1 & 2
CX486M6-33 (66MHz)	1 & 2	2 & 3	Open	1 & 2	2 & 3
CX486M6-40 (40MHz)	2 & 3	2 & 3	Open	1 & 2	1 & 2
CX486M6-33 (33MHz) C6	2 & 3	2 & 3	1 & 2	2 & 3	1 & 2
CX486M6-33 (66MHz) C6	1 & 2	2 & 3	1 & 2	2 & 3	2 & 3
CX486M6-40 (40MHz) C6	2 & 3	2 & 3	1 & 2	2 & 3	1 & 2
80486SX-25 (25MHz)	2 & 3	2 & 3	Open	1 & 2	1 & 2
80486SX-25 (50MHz)	1 & 2	2 & 3	Open	1 & 2	2 & 3
80486SX-33 (33MHz)	2 & 3	2 & 3	Open	1 & 2	1 & 2
80486SX-33 (66MHz)	1 & 2	2 & 3	Open	1 & 2	2 & 3
80486DX-33 (33MHz)	2 & 3	2 & 3	1 & 2	2 & 3	1 & 2
80486DX-33 (66MHz)	1 & 2	2 & 3	1 & 2	2 & 3	2 & 3
80486DX-40 (40MHz)	2 & 3	2 & 3	1 & 2	2 & 3	1 & 2
80486DX-50 (50MHz)	2 & 3	2 & 3	1 & 2	2 & 3	1 & 2
80486DX2-50 (25MHz)	2 & 3	2 & 3	1 & 2	2 & 3	1 & 2
80486DX2-50 (50MHz)	2 & 3	2 & 3	1 & 2	2 & 3	1 & 2
80486DX2-66 (33MHz)	2 & 3	2 & 3	1 & 2	2 & 3	1 & 2
80486DX2-66 (66MHz)	1 & 2	2 & 3	1 & 2	2 & 3	2 & 3
Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CON’T)
Type	JP29	JP30	JP31	JP32	JP34
80386DX-40 (80MHz)	Open	Open	Closed	Closed	Open
CX486DLC-40 (80MHz)	Open	Open	Closed	Closed	Closed
CX486M6-33 (33MHz)	Closed	Closed	Open	Open	Open
CX486M6-33 (66MHz)	Closed	Closed	Open	Open	Open
CX486M6-40 (40MHz)	Closed	Closed	Open	Open	Open
CX486M6-33 (33MHz) C6	Open	Open	Closed	Closed	Open
CX486M6-33 (66MHz) C6	Open	Open	Closed	Closed	Open
CX486M6-40 (40MHz) C6	Open	Open	Closed	Closed	Open
80486SX-25 (25MHz)	Open	Open	Closed	Closed	Open
80486SX-25 (50MHz)	Open	Open	Closed	Closed	Open
80486SX-33 (33MHz)	Open	Open	Closed	Closed	Open
80486SX-33 (66MHz)	Open	Open	Closed	Closed	Open
80486DX-33 (33MHz)	Open	Open	Closed	Closed	Open
80486DX-33 (66MHz)	Open	Open	Closed	Closed	Open
80486DX-40 (40MHz)	Open	Open	Closed	Closed	Open
80486DX-50 (50MHz)	Open	Open	Closed	Closed	Open
80486DX2-50 (25MHz)	Open	Open	Closed	Closed	Open
80486DX2-50 (50MHz)	Open	Open	Closed	Closed	Open
80486DX2-66 (33MHz)	Open	Open	Closed	Closed	Open
80486DX2-66 (66MHz)	Open	Open	Closed	Closed	Open