J-656HXA Motherboard Settings and Configuration

J-MARK COMPUTER CORPORATION

J-656HXA

Processor
Pentium
Processor Speed
75/90/100/120/133/150/166/200MHz
Chip Set
Intel
Video Chip Set
None
Maximum Onboard Memory
384MB
Maximum Video Memory
None
Cache
256/512KB
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 interface, serial ports (2), cache slot, IR connector
NPU Options
None

CONNECTIONS
Purpose
Location
Purpose
Location
Serial port 1
CN1
Reset switch
J5
Serial port 2
CN2
IDE interface LED
J6
Floppy drive interface
CN3
Power LED & keylock
J7
Parallel port
CN4
Turbo LED
J8
IDE interface 2
CN5
Green PC connector
JP16
IDE interface 1
CN6
Chassis fan power
JP36
PS/2 mouse interface
J2
IR connector
JP37
Speaker
J4
32-bit PCI slots
PC1 – PC3

USER CONFIGURABLE SETTINGS
Function
Label
Position
»
CMOS memory normal operation
J12
Pins 2 & 3 closed

CMOS memory clear
J12
Pins 3 & 4 closed

Monitor type select color
JP2
Closed

Monitor type select monochrome
JP2
Open

PS/2 mouse IRQ12 enabled
JPS1
Closed

PS/2 mouse IRQ12 disabled
JPS1
Open

Flash BIOS voltage select 12v
JP17
Pins 1 & 2 closed

Flash BIOS voltage select 5v
JP17
Pins 2 & 3 closed
»
Factory configured - do not alter
JP26
Unidentified
»
Factory configured - do not alter
JP30
Unidentified

DRAM CONFIGURATION
Size
Bank 0
Bank 1
Bank 2
8MB
(2) 1M x 36
None
None
16MB
(2) 2M x 36
None
None
16MB
(2) 1M x 36
(2) 1M x 36
None
24MB
(2) 1M x 36
(2) 2M x 36
None
24MB
(2) 1M x 36
(2) 1M x 36
(2) 1M x 36
24MB
(2) 2M x 36
(2) 1M x 36
None
32MB
(2) 4M x 36
None
None
32MB
(2) 1M x 36
(2) 1M x 36
(2) 2M x 36
32MB
(2) 2M x 36
(2) 2M x 36
None
40MB
(2) 1M x 36
(2) 4M x 36
None
48MB
(2) 1M x 36
(2) 1M x 36
(2) 4M x 36
48MB
(2) 2M x 36
(2) 4M x 36
None
48MB
(2) 2M x 36
(2) 2M x 36
(2) 2M x 36
64MB
(2) 8M x 36
None
None
64MB
(2) 2M x 36
(2) 2M x 36
(2) 4M x 36
64MB
(2) 4M x 36
(2) 4M x 36
None
72MB
(2) 1M x 36
(2) 8M x 36
None

DRAM CONFIGURATION (CON’T)
Size
Bank 0
Bank 1
Bank 2
72MB
(2) 4M x 36
(2) 4M x 36
(2) 1M x 36
80MB
(2) 1M x 36
(2) 1M x 36
(2) 8M x 36
80MB
(2) 2M x 36
(2) 8M x 36
None
80MB
(2) 4M x 36
(2) 4M x 36
(2) 2M x 36
96MB
(2) 2M x 36
(2) 2M x 36
(2) 8M x 36
96MB
(2) 4M x 36
(2) 8M x 36
None
96MB
(2) 4M x 36
(2) 4M x 36
(2) 4M x 36
128MB
(2) 16M x 36
None
None
128MB
(2) 4M x 36
(2) 4M x 36
(2) 8M x 36
128MB
(2) 8M x 36
(2) 8M x 36
None
136MB
(2) 1M x 36
(2) 16M x 36
None
136MB
(2) 8M x 36
(2) 8M x 36
(2) 1M x 36
144MB
(2) 1M x 36
(2) 1M x 36
(2) 16M x 36
144MB
(2) 2M x 36
(2) 16M x 36
None
144MB
(2) 8M x 36
(2) 8M x 36
(2) 2M x 36
160MB
(2) 2M x 36
(2) 2M x 36
(2) 16M x 36
160MB
(2) 4M x 36
(2) 16M x 36
None
160MB
(2) 8M x 36
(2) 8M x 36
(2) 4M x 36
192MB
(2) 4M x 36
(2) 4M x 36
(2) 16M x 36
192MB
(2) 8M x 36
(2) 16M x 36
None
192MB
(2) 8M x 36
(2) 8M x 36
(2) 8M x 36
256MB
(2) 8M x 36
(2) 8M x 36
(2) 16M x 36
264MB
(2) 16M x 36
(2) 16M x 36
(2) 1M x 36
272MB
(2) 16M x 36
(2) 16M x 36
(2) 2M x 36
288MB
(2) 16M x 36
(2) 16M x 36
(2) 4M x 36
320MB
(2) 16M x 36
(2) 16M x 36
(2) 8M x 36
384MB
(2) 16M x 36
(2) 16M x 36
(2) 16M x 36
Note: Board accepts EDO memory.

CACHE CONFIGURATION
Size
Bank 0
SL1
TAG
256KB (A)
(2) 32K x 32
Not installed
(1) 32K x 8
256KB (B)
None
256KB module installed
(1) 32K x 8
512KB (A)
(2) 32K x 32
256KB module installed
(1) 32K x 8
512KB (B)
(2) 64K x 32
Not installed
(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size
JP19
JP20
JP35
256KB (A)
Pins 1 & 2 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
256KB (B)
Pins 1 & 2 closed
Pins 2 & 3 closed
Pins 1 & 2 closed
512KB (A)
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 2 & 3 closed
512KB (B)
Pins 1 & 2 closed
Pins 1 & 2 closed
Pins 2 & 3 closed

CPU SPEED SELECTION
CPU speed
Clock speed
Multiplier
JP22
JP23
JP41
75MHz
50MHz
1.5x
Open
Open
1 & 2, 3 & 4
90MHz
60MHz
1.5x
Open
Open
1 & 2
100MHz
66MHz
1.5x
Open
Open
3 & 4
120MHz
60MHz
2x
Closed
Open
1 & 2
133MHz
66MHz
2x
Closed
Open
3 & 4
150MHz
60MHz
2.5x
Closed
Closed
1 & 2
166MHz
66MHz
2.5x
Closed
Closed
3 & 4
200MHz
66MHz
3x
Open
Closed
3 & 4
Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION
Voltage
JP32
JP33
JP34
3.3v
Closed
Open
Open
3.45v
Open
Closed
Open
3.52v
Open
Open
Closed

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J-656HXA Motherboard Settings and Configuration

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Processor	Pentium
Processor Speed	75/90/100/120/133/150/166/200MHz
Chip Set	Intel
Video Chip Set	None
Maximum Onboard Memory	384MB
Maximum Video Memory	None
Cache	256/512KB
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 interface, serial ports (2), cache slot, IR connector
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Serial port 1	CN1	Reset switch	J5
Serial port 2	CN2	IDE interface LED	J6
Floppy drive interface	CN3	Power LED & keylock	J7
Parallel port	CN4	Turbo LED	J8
IDE interface 2	CN5	Green PC connector	JP16
IDE interface 1	CN6	Chassis fan power	JP36
PS/2 mouse interface	J2	IR connector	JP37
Speaker	J4	32-bit PCI slots	PC1 – PC3

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	CMOS memory normal operation	J12	Pins 2 & 3 closed
	CMOS memory clear	J12	Pins 3 & 4 closed
	Monitor type select color	JP2	Closed
	Monitor type select monochrome	JP2	Open
	PS/2 mouse IRQ12 enabled	JPS1	Closed
	PS/2 mouse IRQ12 disabled	JPS1	Open
	Flash BIOS voltage select 12v	JP17	Pins 1 & 2 closed
	Flash BIOS voltage select 5v	JP17	Pins 2 & 3 closed
»	Factory configured - do not alter	JP26	Unidentified
»	Factory configured - do not alter	JP30	Unidentified

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2
8MB	(2) 1M x 36	None	None
16MB	(2) 2M x 36	None	None
16MB	(2) 1M x 36	(2) 1M x 36	None
24MB	(2) 1M x 36	(2) 2M x 36	None
24MB	(2) 1M x 36	(2) 1M x 36	(2) 1M x 36
24MB	(2) 2M x 36	(2) 1M x 36	None
32MB	(2) 4M x 36	None	None
32MB	(2) 1M x 36	(2) 1M x 36	(2) 2M x 36
32MB	(2) 2M x 36	(2) 2M x 36	None
40MB	(2) 1M x 36	(2) 4M x 36	None
48MB	(2) 1M x 36	(2) 1M x 36	(2) 4M x 36
48MB	(2) 2M x 36	(2) 4M x 36	None
48MB	(2) 2M x 36	(2) 2M x 36	(2) 2M x 36
64MB	(2) 8M x 36	None	None
64MB	(2) 2M x 36	(2) 2M x 36	(2) 4M x 36
64MB	(2) 4M x 36	(2) 4M x 36	None
72MB	(2) 1M x 36	(2) 8M x 36	None

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1	Bank 2
72MB	(2) 4M x 36	(2) 4M x 36	(2) 1M x 36
80MB	(2) 1M x 36	(2) 1M x 36	(2) 8M x 36
80MB	(2) 2M x 36	(2) 8M x 36	None
80MB	(2) 4M x 36	(2) 4M x 36	(2) 2M x 36
96MB	(2) 2M x 36	(2) 2M x 36	(2) 8M x 36
96MB	(2) 4M x 36	(2) 8M x 36	None
96MB	(2) 4M x 36	(2) 4M x 36	(2) 4M x 36
128MB	(2) 16M x 36	None	None
128MB	(2) 4M x 36	(2) 4M x 36	(2) 8M x 36
128MB	(2) 8M x 36	(2) 8M x 36	None
136MB	(2) 1M x 36	(2) 16M x 36	None
136MB	(2) 8M x 36	(2) 8M x 36	(2) 1M x 36
144MB	(2) 1M x 36	(2) 1M x 36	(2) 16M x 36
144MB	(2) 2M x 36	(2) 16M x 36	None
144MB	(2) 8M x 36	(2) 8M x 36	(2) 2M x 36
160MB	(2) 2M x 36	(2) 2M x 36	(2) 16M x 36
160MB	(2) 4M x 36	(2) 16M x 36	None
160MB	(2) 8M x 36	(2) 8M x 36	(2) 4M x 36
192MB	(2) 4M x 36	(2) 4M x 36	(2) 16M x 36
192MB	(2) 8M x 36	(2) 16M x 36	None
192MB	(2) 8M x 36	(2) 8M x 36	(2) 8M x 36
256MB	(2) 8M x 36	(2) 8M x 36	(2) 16M x 36
264MB	(2) 16M x 36	(2) 16M x 36	(2) 1M x 36
272MB	(2) 16M x 36	(2) 16M x 36	(2) 2M x 36
288MB	(2) 16M x 36	(2) 16M x 36	(2) 4M x 36
320MB	(2) 16M x 36	(2) 16M x 36	(2) 8M x 36
384MB	(2) 16M x 36	(2) 16M x 36	(2) 16M x 36
Note: Board accepts EDO memory.

CACHE CONFIGURATION
Size	Bank 0	SL1	TAG
256KB (A)	(2) 32K x 32	Not installed	(1) 32K x 8
256KB (B)	None	256KB module installed	(1) 32K x 8
512KB (A)	(2) 32K x 32	256KB module installed	(1) 32K x 8
512KB (B)	(2) 64K x 32	Not installed	(1) 32K x 8

CACHE JUMPER CONFIGURATION
Size	JP19	JP20	JP35
256KB (A)	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
256KB (B)	Pins 1 & 2 closed	Pins 2 & 3 closed	Pins 1 & 2 closed
512KB (A)	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 2 & 3 closed
512KB (B)	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 2 & 3 closed

CPU SPEED SELECTION
CPU speed	Clock speed	Multiplier	JP22	JP23	JP41
75MHz	50MHz	1.5x	Open	Open	1 & 2, 3 & 4
90MHz	60MHz	1.5x	Open	Open	1 & 2
100MHz	66MHz	1.5x	Open	Open	3 & 4
120MHz	60MHz	2x	Closed	Open	1 & 2
133MHz	66MHz	2x	Closed	Open	3 & 4
150MHz	60MHz	2.5x	Closed	Closed	1 & 2
166MHz	66MHz	2.5x	Closed	Closed	3 & 4
200MHz	66MHz	3x	Open	Closed	3 & 4
Note: Pins designated should be in the closed position.

CPU VOLTAGE SELECTION
Voltage	JP32	JP33	JP34
3.3v	Closed	Open	Open
3.45v	Open	Closed	Open
3.52v	Open	Open	Closed