J-MARK COMPUTER CORPORATION
J-656VXB
|
Processor |
CX M1/AM K5/Pentium |
|
Processor Speed |
75/90/100/120/133/150/166/200MHz |
|
Chip Set |
Intel |
|
Video Chip Set |
None |
|
Maximum Onboard Memory |
128MB (EDO supported) |
|
Maximum Video Memory |
None |
|
Cache |
256/512KB |
|
BIOS |
Award |
|
Dimensions |
270mm 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 |
IDE interface LED |
JC5 |
|
Serial port 2 |
CN2 |
Power LED & keylock |
JC6 |
|
Parallel port |
CN3 |
Turbo switch |
JC7 |
|
Floppy drive interface |
CN4 |
Green PC connector |
JC8 |
|
IDE interface 2 |
CN5 |
IR connector |
JP12 |
|
IDE interface 1 |
CN6 |
Chassis fan power |
JP21 |
|
PS/2 mouse interface |
J1 |
External battery |
JP23 |
|
Speaker |
JC2 |
32-bit PCI slots |
PC1 PC3 |
|
Reset switch |
JC3 |
Cache slot |
SL1 |
|
Turbo LED |
JC4 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Factory configured - do not alter |
J4 |
Unidentified |
|
|
Factory configured - do not alter |
JP3 |
Unidentified |
|
PCICLK select PCICLK/4 |
JP22 |
Closed | |
|
PCICLK select PCICLK/3 |
JP22 |
Open | |
|
PS/2 IRQ12 enabled |
JP29 |
Closed | |
|
PS/2 IRQ12 disabled |
JP29 |
Open | |
|
Flash BIOS voltage select 12v |
JP33 |
Pins 1 & 2 closed | |
|
Flash BIOS voltage select 5v |
JP33 |
Pins 2 & 3 closed | |
|
DIMM/DRAM CONFIGURATION | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
8MB |
(2) 1M x 36 |
None |
None |
|
8MB |
None |
None |
(1) 1M x 64 |
|
16MB |
(2) 2M x 36 |
None |
None |
|
16MB |
(2) 1M x 36 |
(2) 1M x 36 |
None |
|
16MB |
None |
None |
(1) 2M x 64 |
|
24MB |
(2) 2M x 36 |
(2) 1M x 36 |
None |
|
32MB |
(2) 4M x 36 |
None |
None |
|
32MB |
(2) 2M x 36 |
(2) 2M x 36 |
None |
|
32MB |
None |
None |
(1) 4M x 64 |
|
40MB |
(2) 4M x 36 |
(2) 1M x 36 |
None |
|
48MB |
(2) 4M x 36 |
(2) 2M x 36 |
None |
|
DIMM/DRAM CONFIGURATION (CONT) | |||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
|
64MB |
(2) 8M x 36 |
None |
None |
|
64MB |
(2) 4M x 36 |
(2) 4M x 36 |
None |
|
72MB |
(2) 8M x 36 |
(2) 1M x 36 |
None |
|
80MB |
(2) 8M x 36 |
(2) 2M x 36 |
None |
|
96MB |
(2) 8M x 36 |
(2) 4M x 36 |
None |
|
128MB |
(2) 8M x 36 |
(2) 8M x 36 |
None |
|
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) |
None |
512KB module installed |
(1) 32K x 8 |
|
CACHE JUMPER CONFIGURATION | ||||
|
Size |
JP1 |
JP2 |
JP7 |
JP8 |
|
256KB (A) |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
|
256KB (B) |
1 & 2 |
1 & 2 |
1 & 2 |
1 & 2 |
|
512KB (A, Jet-Way module) |
2 & 3 |
1 & 2 |
2 & 3 |
1 & 2 |
|
512KB (A, Intel module) |
1 & 2 |
2 & 3 |
1 & 2 |
2 & 3 |
|
512KB (B, Jet-Way module) |
2 & 3 |
1 & 2 |
2 & 3 |
1 & 2 |
|
512KB (B, Intel module) |
1 & 2 |
2 & 3 |
1 & 2 |
2 & 3 |
|
Note: Pins designated should be in the closed position. | ||||
|
CPU SPEED SELECTION (CYRIX) | |||||
|
CPU speed |
Clock speed |
Multiplier |
J5 |
JP13 |
JP14 |
|
120MHz |
50MHz |
2x |
3 & 4, 5 & 6 |
Closed |
Open |
|
133MHz |
55MHz |
2x |
3 & 4 |
Closed |
Open |
|
150MHz |
60MHz |
2x |
5 & 6 |
Closed |
Open |
|
166MHz |
66MHz |
2x |
Open |
Closed |
Open |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU SPEED SELECTION (AMD) | |||||
|
CPU speed |
Clock speed |
Multiplier |
J5 |
JP13 |
JP14 |
|
90MHz |
60MHz |
1.5x |
5 & 6 |
Open |
Open |
|
100MHz |
66MHz |
1.5x |
Open |
Open |
Open |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU SPEED SELECTION (INTEL) | |||||
|
CPU speed |
Clock speed |
Multiplier |
J5 |
JP13 |
JP14 |
|
75MHz |
50MHz |
1.5x |
3 & 4, 5 & 6 |
Open |
Open |
|
90MHz |
60MHz |
1.5x |
5 & 6 |
Open |
Open |
|
100MHz |
66MHz |
1.5x |
Open |
Open |
Open |
|
120MHz |
60MHz |
2x |
5 & 6 |
Closed |
Open |
|
133MHz |
66MHz |
2x |
Open |
Closed |
Open |
|
150MHz |
60MHz |
2.5x |
5 & 6 |
Closed |
Closed |
|
166MHz |
66MHz |
2.5x |
Open |
Closed |
Closed |
|
200MHz |
66MHz |
3x |
Open |
Open |
Closed |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU VOLTAGE SELECTION (SINGLE) | |||
|
Voltage |
JP24 |
JP25 |
JP26 |
|
3.3v |
Closed |
Open |
Open |
|
3.45v |
Open |
Closed |
Open |
|
3.52v |
Open |
Open |
Closed |
|
CPU VOLTAGE SELECTION (DUAL) | |||||||
|
Voltage |
V core |
J11 |
J12 |
J13 |
JP24 |
JP25 |
JP26 |
|
3.3v |
2.5v |
Closed |
Open |
Open |
Closed |
Open |
Open |
|
3.3v |
2.8v |
Open |
Closed |
Open |
Open |
Closed |
Open |
|
3.3v |
3.45v |
Open |
Open |
Closed |
Open |
Open |
Closed |
|
3.45v |
2.5v |
Closed |
Open |
Open |
Closed |
Open |
Open |
|
3.45v |
2.8v |
Open |
Closed |
Open |
Open |
Closed |
Open |
|
3.45v |
3.45v |
Open |
Open |
Closed |
Open |
Open |
Closed |
|
3.52v |
2.5v |
Closed |
Open |
Open |
Closed |
Open |
Open |
|
3.52v |
2.8v |
Open |
Closed |
Open |
Open |
Closed |
Open |
|
3.52v |
3.45v |
Open |
Open |
Closed |
Open |
Open |
Closed |
MOS
|
CMOS SELECTION | |||
|
Setting |
JP23 |
JP35 | |
|
CMOS memory normal operation |
Pins 2 & 3 closed |
Open | |
|
CMOS memory clear |
Pins 3 & 4 closed |
Closed | |