J-MARK COMPUTER CORPORATION
J-656C
|
Processor |
CX M1/Pentium |
|
Processor Speed |
75/90/100/120/133/150/166/180/200MHz |
|
Chip Set |
Intel |
|
Video Chip Set |
None |
|
Maximum Onboard Memory |
128MB (EDO supported) |
|
Maximum Video Memory |
None |
|
Cache |
256/512KB |
|
BIOS |
Award |
|
Dimensions |
255mm x 220mm |
|
I/O Options |
32-bit PCI slots (4), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), cache slot |
|
NPU Options |
None |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
IDE interface 2 |
J1 |
IDE interface LED |
JP6 pins 14 & 15 |
|
IDE interface 1 |
J2 |
Turbo switch |
JP6 pins 18 & 19 |
|
Serial port 2 |
J7 |
Reset switch |
JP6 pins 22 & 23 |
|
Serial port 1 |
J8 |
Turbo LED |
JP6 pins 25 & 26 |
|
Floppy drive interface |
J9 |
Parallel port |
JP15 |
|
Power LED & keylock |
JP6 pins 1 - 5 |
32-bit PCI slots |
PC1 PC4 |
|
Green PC connector |
JP6 pins 7 & 8 |
PS/2 mouse interface |
PS2 |
|
Speaker |
JP6 pins 10 - 13 |
Cache slot |
SL1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Factory configured - do not alter |
J5 |
Unidentified |
|
|
CMOS memory normal operation |
JP3 |
Open |
|
CMOS memory clear |
JP3 |
Closed | |
|
Flash BIOS voltage select 12v |
JP5 |
Pins 1 & 2 closed | |
|
Flash BIOS voltage select 5v |
JP5 |
Pins 2 & 3 closed | |
|
|
ISA clock select PCI CLK/4 |
JP8 |
Pins 2 & 3 closed |
|
ISA clock select PCI CLK/3 |
JP8 |
Pins 1 & 2 closed | |
|
|
Factory configured - do not alter |
JP13 |
Unidentified |
|
|
Factory configured - do not alter |
JV1 |
Unidentified |
|
|
Factory configured - do not alter |
JW1 |
Unidentified |
|
|
Factory configured - do not alter |
JW2 |
Unidentified |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
8MB |
(2) 1M x 36 |
None |
|
16MB |
(2) 2M x 36 |
None |
|
16MB |
(2) 1M x 36 |
(2) 1M x 36 |
|
24MB |
(2) 2M x 36 |
(2) 1M x 36 |
|
32MB |
(2) 4M x 36 |
None |
|
32MB |
(2) 2M x 36 |
(2) 2M x 36 |
|
40MB |
(2) 4M x 36 |
(2) 1M x 36 |
|
48MB |
(2) 4M x 36 |
(2) 2M x 36 |
|
64MB |
(2) 8M x 36 |
None |
|
64MB |
(2) 4M x 36 |
(2) 4M x 36 |
|
72MB |
(2) 8M x 36 |
(2) 1M x 36 |
|
80MB |
(2) 8M x 36 |
(2) 2M x 36 |
|
96MB |
(2) 8M x 36 |
(2) 4M x 36 |
|
128MB |
(2) 8M x 36 |
(2) 8M x 36 |
|
Note: Board accepts EDO memory. Board also accepts x 32 SIMMs. Banks are interchangeable at 64MB and above. | ||
|
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 |
JC1 |
JC2 |
JT2 |
JX2 |
|
256KB (A) |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
256KB (B) |
N/A |
N/A |
N/A |
N/A |
|
512KB (A) |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
|
512KB (B) |
N/A |
N/A |
N/A |
N/A |
|
CACHE TYPE CONFIGURATION | |
|
Type |
JP101 |
|
Asynchronous |
Closed |
|
Synchronous |
Open |
|
CPU SPEED SELECTION (CYRIX) | |||||
|
CPU speed |
Clock speed |
Multiplier |
JF1 |
J1 |
J3 |
|
120MHz |
50MHz |
2x |
3 & 4 |
Closed |
Open |
|
150MHz |
60MHz |
2x |
1 & 2 |
Closed |
Open |
|
166MHz |
66MHz |
2x |
Open |
Closed |
Open |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU SPEED SELECTION (INTEL) | |||||
|
CPU speed |
Clock speed |
Multiplier |
JF1 |
J1 |
J3 |
|
75MHz |
50MHz |
1.5x |
3 & 4 |
Open |
Open |
|
90MHz |
60MHz |
1.5x |
1 & 2 |
Open |
Open |
|
100MHz |
66MHz |
1.5x |
Open |
Open |
Open |
|
120MHz |
60MHz |
2x |
1 & 2 |
Closed |
Open |
|
133MHz |
66MHz |
2x |
Open |
Closed |
Open |
|
150MHz |
60MHz |
2.5x |
1 & 2 |
Closed |
Closed |
|
166MHz |
66MHz |
2.5x |
Open |
Closed |
Closed |
|
180MHz |
60MHz |
3x |
1 & 2 |
Open |
Closed |
|
200MHz |
66MHz |
3x |
Open |
Open |
Closed |
|
Note: Pins designated should be in the closed position. | |||||
|
CPU VOLTAGE SELECTION | ||
|
Voltage |
JV2 | |
|
3.3v |
Pins 1 & 2 closed | |
|
3.45v |
Pins 3 & 4 closed | |
|
3.6v |
Pins 5 & 6 closed | |
|
CPU CLOCK TOLERANCE SELECTION | ||
|
Tolerance |
JP7 | |
|
3.3v |
Pins 2 & 3 closed | |
|
5v |
Pins 1 & 2 closed | |