MB-8500SAC Motherboard Settings and Configuration

Processor	CX M1/AM K5/Pentium
Processor Speed	75/90/100/120/133/150/166/180MHz
Chip Set	Unidentified
Video Chip Set	SIS
Maximum Onboard Memory	128MB (EDO supported)
Maximum Video Memory	None
Cache	256/512/1024KB
BIOS	Award
Dimensions	280mm x 220mm
I/O Options	32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), feature connector, audio connector
NPU Options	None

CONNECTIONS
Function	Label	Function	Label
PS/2 mouse port	J6	Audio connector	J20
VGA IDC connector	J7	Chassis fan power	JP12
VGA D type connector	J8	Speaker	JP14 pins 1 - 4
Feature connector	J10	Power LED & keylock	JP14 pins 5 - 9
Serial port 2	J11	Turbo LED	JP14 pins 10 & 11
Floppy drive interface	J12	Reset switch	JP14 pins 12 & 13
Serial port 1	J13	Green PC connector	JP14 pins 17 & 18
Parallel port	J14	IDE interface LED	JP14 pins 20 & 21
IDE interface 1	J15	VCC ground connector	JP14 pins 25 & 26
IDE interface 2	J16	32-bit PCI slots	PC1 - PC3
External battery	J18
Note: J6, J7 and J8 are optional. Only one will be installed where J6 is shown.

USER CONFIGURABLE SETTINGS
Setting		Label	Position
	Jumper information unavailable	J2	N/A
	Jumper information unavailable	JP4	Unidentified
»	CMOS memory normal operation	J18	Open
	CMOS memory clear	J18	Pins 3 & 4 closed
	Battery type select external	J18	Closed
»	Jumper information unavailable	J19	Unidentified
»	Factory configured - do not alter	JP2	Unidentified
»	Battery type select internal	JP9	Closed
	Battery type select external	JP9	Open
	Flash BIOS voltage select 12v	JP10	Pins 1 & 2 closed
	Flash BIOS voltage select 5v	JP10	Pins 2 & 3 closed
	Flash BIOS EPROM or 0v flash	JP10	Open

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
4MB	(1) 1M x 36	None	None	None
8MB	(1) 2M x 36	None	None	None
8MB	(1) 1M x 36	(1) 1M x 36	None	None
12MB	(1) 2M x 36	(1) 1M x 36	None	None
12MB	(1) 1M x 36	(1) 2M x 36	None	None
16MB	(1) 4M x 36	None	None	None
16MB	(1) 2M x 36	(1) 2M x 36	None	None
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
20MB	(1) 4M x 36	(1) 1M x 36	None	None
20MB	(1) 2M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2	Bank 3
20MB	(1) 1M x 36	(1) 4M x 36	None	None
24MB	(1) 4M x 36	(1) 2M x 36	None	None
24MB	(1) 2M x 36	(1) 4M x 36	None	None
28MB	(1) 4M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
28MB	(1) 1M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
32MB	(1) 8M x 36	None	None	None
32MB	(1) 4M x 36	(1) 4M x 36	None	None
32MB	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
36MB	(1) 8M x 36	(1) 1M x 36	None	None
36MB	(1) 1M x 36	(1) 8M x 36	None	None
40MB	(1) 8M x 36	(1) 2M x 36	None	None
40MB	(1) 4M x 36	(1) 2M x 36	(1) 2M x 36	(1) 2M x 36
40MB	(1) 2M x 36	(1) 8M x 36	None	None
44MB	(1) 8M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
48MB	(1) 8M x 36	(1) 4M x 36	None	None
48MB	(1) 4M x 36	(1) 8M x 36	None	None
100MB	(1) 1M x 36	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36
104MB	(1) 2M x 36	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36
112MB	(1) 4M x 36	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36
128MB	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36	(1) 8M x 36
Note: Board accepts EDO memory.

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
256KB (A)	None	(2) 32K x 32	None
256KB (B)	(8) 32K x 8	None	(1) 8K x 8
512KB	(8) 64K x 8	None	(1) 32K x 8
1MB	(8) 128K x 8	None	(1) 32K x 8
Note: Board will either have asynchronous or synchronous pipeline burst cache installed.

CACHE JUMPER CONFIGURATION
Size	JP6
256KB (B)	Open
512KB	Pins 1 & 2 closed
1MB	Pins 1 & 2, 3 & 4 closed

CPU TYPE SELECTION
Type	JP15	JP16
P54C/CQS/CT	Pins 1 & 2, 3 & 4 closed	Pins 1 & 2 closed
P55C/CT	Open	Pins 2 & 3 closed

CPU TYPE SELECTION
Type	JP15	JP16
P54C/CQS/CT	Pins 1 & 2, 3 & 4 closed	Pins 1 & 2 closed
P55C/CT	Open	Pins 2 & 3 closed

CPU SPEED SELECTION
Speed	JP7	JP8	JP11
75MHz	Open	Closed	Open
90MHz	Closed	Open	Open
100MHz	Open	Open	Open
120MHz	Closed	Open	Pins 1 & 2 closed
133MHz	Open	Open	Pins 1 & 2 closed
150MHz	Closed	Open	Pins 1 & 2, 3 & 4 closed
166MHz	Open	Open	Pins 1 & 2, 3 & 4 closed
180MHz	Closed	Open	Pins 3 & 4 closed

CPU VOLTAGE SELECTION
Voltage	JP13
3.4v (VRE CPU)	Pins 1 & 2 closed
3.5v (VR CPU)	Pins 2 & 3 closed

CPU VOLTAGE SELECTION
Voltage	JP16
3.3v (P55C/CT)	Pins 2 & 3 closed
5v (P54C/CQS/CT)	Pins 1 & 2 closed

MISCELLANEOUS TECHNICAL NOTE

Depending on board version, a VGA D type port or a serial port could be installed where J6 is shown.