J-MARK COMPUTER CORPORATION
J-7BXAS
| Device Type | Mainboard |
| Processor | Pentium II |
| Processor Speed | 233/266/300/333/350/400/450MHz |
| Chip Set | Intel 440BX |
| Maximum Onboard Memory | 768MB (EDO & SDRAM supported) |
| Cache | 256/512KB (located on Pentium II CPU) |
| BIOS | Unidentified |
| Dimensions | 305mm x 190mm |
| I/O Options | 32-bit PCI slots (4), floppy drive interface, game/MIDI port, 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, line in, line out, microphone in, audio in – CD-ROMs (2) |
CONNECTIONS |
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| Purpose | Location |
Purpose | Location |
| AGP slot | AGP |
Parallel port | CN3 |
| ATX power connector | ATX |
Serial port 1 | CN4 |
| Chassis fan power | C1 |
Game/MIDI port | CN5 |
| Soft off power supply | C2 |
Microphone in | CN6 |
| IDE interface LED | C3/pins 1 & 3 |
Line in | CN7 |
| Green PC connector | C3/pins 2 & 4 |
Line out | CN8 |
| Turbo switch | C4 |
USB connector 1 | CN9 |
| Power LED & keylock | C5 |
USB connector 2 | CN10 |
| Turbo LED | C6 |
IDE interface 2 | CN11 |
| Reset switch | C7 |
IDE interface 1 | CN12 |
| Speaker | C8 |
Floppy drive interface | CN13 |
| Chassis fan power | C9 |
IR connector | J7 |
| CPU fan power | C10 |
Audio in – CD-ROM | JP6 |
| PS/2 mouse port | CN1 |
Audio in – CD-ROM | JP7 |
| Serial port 2 | CN2 |
32-bit PCI slots | PC1 – PC4 |
USER CONFIGURABLE SETTINGS |
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Function |
Label |
Position |
|
» |
Factory configured - do not alter | J2 |
Unidentified |
» |
Factory configured - do not alter | JP3 |
Unidentified |
» |
Factory configured - do not alter | JP4 |
Unidentified |
DIMM CONFIGURATION |
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Size |
Bank 0 |
Bank 1 |
Bank 2 |
8MB |
(1) 1M x 64 |
None |
None |
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 |
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 |
DIMM CONFIGURATION (CON’T) |
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Size |
Bank 0 |
Bank 1 |
Bank 2 |
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 |
96MB |
(1) 8M x 64 |
(1) 4M x 64 |
None |
96MB |
(1) 4M x 64 |
(1) 4M x 64 |
(1) 4M x 64 |
104MB |
(1) 8M x 64 |
(1) 4M x 64 |
(1) 1M x 64 |
112MB |
(1) 8M x 64 |
(1) 4M 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 |
136MB |
(1) 16M x 64 |
(1) 1M x 64 |
None |
136MB |
(1) 8M x 64 |
(1) 8M x 64 |
(1) 1M x 64 |
144MB |
(1) 16M x 64 |
(1) 1M x 64 |
(1) 1M x 64 |
144MB |
(1) 16M x 64 |
(1) 2M 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) 16M x 64 |
(1) 8M x 64 |
None |
192MB |
(1) 8M x 64 |
(1) 8M x 64 |
(1) 8M x 64 |
200MB |
(1) 16M x 64 |
(1) 8M x 64 |
(1) 1M x 64 |
208MB |
(1) 16M x 64 |
(1) 8M x 64 |
(1) 2M x 64 |
224MB |
(1) 16M x 64 |
(1) 8M x 64 |
(1) 4M 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) 32M x 64 |
(1) 16M x 64 |
None |
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 |
J10 |
U12/1 |
U12/2 |
U12/3 |
U12/4 |
233MHz |
66MHz |
3.5x |
2 & 3 |
Off |
Off |
On |
On |
266MHz |
66MHz |
4x |
2 & 3 |
On |
On |
Off |
On |
300MHz |
66MHz |
4.5x |
2 & 3 |
Off |
On |
Off |
On |
333MHz |
66MHz |
5x |
2 & 3 |
On |
Off |
Off |
On |
350MHz |
100MHz |
3.5x |
1 & 2 |
Off |
Off |
On |
On |
400MHz |
100MHz |
4x |
1 & 2 |
On |
On |
Off |
On |
450MHz |
100MHz |
4.5x |
1 & 2 |
Off |
On |
Off |
On |
| Note: Pins designated should be in the closed position. | |||||||
CMOS/BATTERY SELECTION |
|
Setting |
JP1 |
»CMOS memory normal operation |
Pins 2 & 3 closed |
CMOS memory clear |
Pins 3 & 4 closed |
External battery installed |
Closed |