J-MARK COMPUTER CORPORATION
J-7XA
Device Type |
Mainboard |
Processor |
Pentium II |
Processor Speed |
233/266/300/333MHz |
Chip Set |
Intel 440LX |
Maximum Onboard Memory |
768MB (EDO & SDRAM supported) |
Cache |
256/512KB (located on Pentium II CPU) |
BIOS |
Award |
Dimensions |
305mm x 170mm |
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), IR connector, USB connectors (2), ATX power connector, AGP slot, SB-link connector |
CONNECTIONS |
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Purpose |
Location |
Purpose |
Location |
AGP slot |
AGP |
IDE interface 1 |
CN1 |
ATX power connector |
ATX |
IDE interface 2 |
CN2 |
Speaker |
C1 |
Floppy drive interface |
CN3 |
Reset switch |
C2 |
USB connector 1 |
CN4 |
Turbo LED |
C3 |
USB connector 2 |
CN5 |
Power LED & keylock |
C4 |
Serial port 2 |
CN6 |
Turbo switch |
C5 |
Serial port 1 |
CN7 |
IDE interface LED |
C6/pins 1 & 3 |
PS/2 mouse port |
J2 |
Green PC connector |
C6/pins 2 & 4 |
Parallel port |
J6 |
Soft off power supply |
C7/pins 2 & 4 |
IR connector |
J7 |
Chassis fan power |
C8 |
SB-link connector |
JP7 |
CPU fan power |
C9 |
32-bit PCI slots |
PC1 - PC4 |
Chassis fan power |
C10 |
|
|
USER CONFIGURABLE SETTINGS |
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Function |
Label |
Position |
|
» |
Factory configured - do not alter |
JERP |
Unidentified |
» |
Factory configured - do not alter |
JP1 |
Unidentified |
» |
Factory configured - do not alter |
JP4 |
Unidentified |
» |
Factory configured - do not alter |
JP6 |
Unidentified |
» |
Factory configured - do not alter |
JP8 |
Unidentified |
» |
Factory configured - do not alter |
JP9 |
Unidentified |
» |
Factory configured - do not alter |
JP10 |
Unidentified |
» |
Factory configured - do not alter |
JP11 |
Unidentified |
» |
CMOS memory normal operation |
RTC |
Pins 2 & 3 closed |
|
CMOS memory clear |
RTC |
Pins 3 & 4 closed |
|
Battery type select external |
RTC |
Closed |
» |
Factory configured - do not alter |
U19/8 |
Off |
DIMM CONFIGURATION |
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Size |
Bank 0 |
Bank 1 |
Bank 2 |
16MB |
(1) 2M x 64 |
None |
None |
16MB |
(1) 1M x 64 |
(1) 1M x 64 |
None |
24MB |
(1) 2M x 64 |
(1) 1M x 64 |
None |
24MB |
(1) 1M x 64 |
(1) 1M x 64 |
(1) 1M x 64 |
32MB |
(1) 4M x 64 |
None |
None |
32MB |
(1) 2M x 64 |
(1) 1M x 64 |
(1) 1M x 64 |
32MB |
(1) 2M x 64 |
(1) 2M x 64 |
None |
40MB |
(1) 4M x 64 |
(1) 1M x 64 |
None |
40MB |
(1) 2M x 64 |
(1) 2M x 64 |
(1) 1M x 64 |
48MB |
(1) 4M x 64 |
(1) 1M x 64 |
(1) 1M x 64 |
48MB |
(1) 4M x 64 |
(1) 2M x 64 |
None |
DIMM CONFIGURATION (CON'T) |
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Size |
Bank 0 |
Bank 1 |
Bank 2 |
48MB |
(1) 2M x 64 |
(1) 2M x 64 |
(1) 2M x 64 |
56MB |
(1) 4M x 64 |
(1) 2M x 64 |
(1) 1M x 64 |
64MB |
(1) 8M x 64 |
None |
None |
64MB |
(1) 4M x 64 |
(1) 2M x 64 |
(1) 2M x 64 |
64MB |
(1) 4M x 64 |
(1) 4M x 64 |
None |
72MB |
(1) 8M x 64 |
(1) 1M x 64 |
None |
72MB |
(1) 4M x 64 |
(1) 4M x 64 |
(1) 1M x 64 |
80MB |
(1) 8M x 64 |
(1) 1M x 64 |
(1) 1M x 64 |
80MB |
(1) 8M x 64 |
(1) 2M x 64 |
None |
80MB |
(1) 4M x 64 |
(1) 4M x 64 |
(1) 2M x 64 |
88MB |
(1) 8M x 64 |
(1) 2M x 64 |
(1) 1M x 64 |
96MB |
(1) 8M x 64 |
(1) 2M x 64 |
(1) 2M x 64 |
128MB |
(1) 16M x 64 |
None |
None |
128MB |
(1) 8M x 64 |
(1) 4M x 64 |
(1) 4M x 64 |
128MB |
(1) 8M x 64 |
(1) 8M x 64 |
None |
144MB |
(1) 8M x 64 |
(1) 8M x 64 |
(1) 2M x 64 |
152MB |
(1) 16M x 64 |
(1) 2M x 64 |
(1) 1M x 64 |
160MB |
(1) 16M x 64 |
(1) 2M x 64 |
(1) 2M x 64 |
160MB |
(1) 16M x 64 |
(1) 4M x 64 |
None |
160MB |
(1) 8M x 64 |
(1) 8M x 64 |
(1) 4M x 64 |
168MB |
(1) 16M x 64 |
(1) 4M x 64 |
(1) 1M x 64 |
176MB |
(1) 16M x 64 |
(1) 4M x 64 |
(1) 2M x 64 |
192MB |
(1) 16M x 64 |
(1) 4M x 64 |
(1) 4M x 64 |
192MB |
(1) 8M x 64 |
(1) 8M x 64 |
(1) 8M x 64 |
256MB |
(1) 32M x 64 |
None |
None |
256MB |
(1) 16M x 64 |
(1) 8M x 64 |
(1) 8M x 64 |
264MB |
(1) 32M x 64 |
(1) 1M x 64 |
None |
272MB |
(1) 32M x 64 |
(1) 1M x 64 |
(1) 1M x 64 |
272MB |
(1) 32M x 64 |
(1) 2M x 64 |
None |
288MB |
(1) 32M x 64 |
(1) 2M x 64 |
(1) 2M x 64 |
288MB |
(1) 32M x 64 |
(1) 4M x 64 |
None |
320MB |
(1) 32M x 64 |
(1) 4M x 64 |
(1) 4M x 64 |
320MB |
(1) 32M x 64 |
(1) 8M x 64 |
None |
384MB |
(1) 32M x 64 |
(1) 8M x 64 |
(1) 8M x 64 |
384MB |
(1) 16M x 64 |
(1) 16M x 64 |
(1) 16M x 64 |
512MB |
(1) 32M x 64 |
(1) 16M x 64 |
(1) 16M x 64 |
512MB |
(1) 32M x 64 |
(1) 32M x 64 |
None |
768MB |
(1) 32M x 64 |
(1) 32M x 64 |
(1) 32M x 64 |
Note: Board accepts EDO & SDRAM memory. |
CACHE CONFIGURATION |
Note: 256KB/512KB cache is located on the Pentium II CPU. |
CPU SPEED SELECTION |
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CPU speed |
Clock speed |
Multiplier |
U19/1 |
U19/2 |
U19/3 |
U19/4 |
233MHz |
66MHz |
3.5x |
On |
On |
Off |
Off |
266MHz |
66MHz |
4x |
On |
Off |
On |
On |
300MHz |
66MHz |
4.5x |
On |
Off |
Off |
On |
333MHz |
66MHz |
5x |
On |
Off |
On |
Off |
CPU SPEED SELECTION (CON'T) |
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CPU speed |
Clock speed |
Multiplier |
U19/5 |
U19/6 |
U19/7 |
233MHz |
66MHz |
3.5x |
Off |
Off |
Off |
266MHz |
66MHz |
4x |
Off |
Off |
Off |
300MHz |
66MHz |
4.5x |
Off |
Off |
Off |
333MHz |
66MHz |
5x |
Off |
Off |
Off |