J-MARK COMPUTER CORPORATION
J-598B
| Device Type | Mainboard |
| Processor | CX 6X86/IBM 6X86/CX 6X86MX/IBM
6X86MX/IDT C6/AM K5/ AM K6/AM K6-2/Pentium/Pentium MMX |
| Processor Speed | 90/100/120/133/150/166/200/233/266/300/333MHz |
| Chip Set | VIA Apollo |
| Maximum Onboard Memory | 384MB (EDO & SDRAM supported) |
| Cache | 512KB |
| BIOS | Unidentified |
| Dimensions | 220mm x 220mm |
| I/O Options | 32-bit PCI slots (3), floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse interface, serial ports (2), IR connector, USB connector, ATX power connector, AGP slot |
CONNECTIONS |
|||
| Purpose | Location |
Purpose | Location |
| AGP slot | AGP |
IR connector | IR1 |
| ATX power connector | ATX |
Speaker | J7A |
| Chassis fan power | C1 |
Reset switch | J7B |
| PS/2 mouse interface | CN1 |
Turbo LED | J7C |
| Serial port 1 | CN2 |
Power LED & keylock | J7D |
| Serial port 2 | CN3 |
Turbo switch | J7E |
| Parallel port | CN4 |
IDE interface LED | J8/pins 2 & 4 |
| Floppy drive interface | CN5 |
Soft off power supply | J9/pins 2 & 4 |
| IDE interface 2 | CN6 |
32-bit PCI slots | PC1 – PC3 |
| IDE interface 1 | CN7 |
USB connector | USB |
USER CONFIGURABLE SETTINGS |
|||
Function |
Label |
Position |
|
» |
Factory configured - do not alter | J2 |
Unidentified |
» |
CMOS memory normal operation | J3 |
Pins 2 & 3 closed |
| CMOS memory clear | J3 |
Pins 3 & 4 closed |
|
» |
Factory configured - do not alter | J4 |
Unidentified |
» |
Factory configured - do not alter | J6 |
Unidentified |
» |
Factory configured - do not alter | JP1 |
Unidentified |
SIMM CONFIGURATION |
|
Size |
Bank 2 |
16MB |
(2) 2M x 36 |
32MB |
(2) 4M x 36 |
64MB |
(2) 8M x 36 |
128MB |
(2) 16M x 36 |
| Note: Board accepts EDO memory. | |
DIMM CONFIGURATION |
||
Size |
Bank 0 |
Bank 1 |
8MB |
(1) 1M x 64 |
None |
16MB |
(1) 2M x 64 |
None |
16MB |
(1) 1M x 64 |
(1) 1M x 64 |
24MB |
(1) 2M x 64 |
(1) 1M x 64 |
32MB |
(1) 4M x 64 |
None |
32MB |
(1) 2M x 64 |
(1) 2M x 64 |
40MB |
(1) 4M x 64 |
(1) 1M x 64 |
48MB |
(1) 4M x 64 |
(1) 2M x 64 |
64MB |
(1) 8M x 64 |
None |
64MB |
(1) 4M x 64 |
(1) 4M x 64 |
72MB |
(1) 8M x 64 |
(1) 1M x 64 |
80MB |
(1) 8M x 64 |
(1) 2M x 64 |
96MB |
(1) 8M x 64 |
(1) 4M x 64 |
128MB |
(1) 16M x 64 |
None |
128MB |
(1) 8M x 64 |
(1) 8M x 64 |
136MB |
(1) 16M x 64 |
(1) 1M x 64 |
144MB |
(1) 16M x 64 |
(1) 2M x 64 |
160MB |
(1) 16M x 64 |
(1) 4M x 64 |
192MB |
(1) 16M x 64 |
(1) 8M x 64 |
256MB |
(1) 16M x 64 |
(1) 16M x 64 |
| Note: Board accepts SDRAM memory. | ||
SDRAM CLOCK CONFIGURATION |
||
Setting |
J1 |
JP2 |
SDRAM clock = AGP clock |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
SDRAM clock = CPU clock |
Pins 2 & 3 closed |
Pins 2 & 3 closed |
CACHE CONFIGURATION |
||
Size |
Bank 0 |
TAG |
512KB |
(1) 64K x 64 |
Unidentified |
CPU SPEED SELECTION (CX 6X86) |
||||||
CPU speed |
Clock speed |
Multiplier |
JP3 |
JP4 |
U2/1 |
U2/2 |
150MHz |
60MHz |
2x |
2 & 3 |
Open |
On |
Off |
166MHz |
66MHz |
2x |
2 & 3 |
Open |
On |
Off |
200MHz |
75MHz |
2x |
1 & 2 |
1 & 2 |
On |
Off |
| Note: Pins designated should be in the closed position. | ||||||
CPU SPEED SELECTION (CX 6X86, CON’T) |
||||||
CPU speed |
Clock speed |
Multiplier |
U2/3 |
U2/4 |
U2/5 |
U2/6 |
150MHz |
60MHz |
2x |
Off |
On |
On |
On |
166MHz |
66MHz |
2x |
Off |
Off |
On |
On |
200MHz |
75MHz |
2x |
Off |
On |
On |
Off |
CPU SPEED SELECTION (IBM 6X86) |
||||||
CPU speed |
Clock speed |
Multiplier |
JP3 |
JP4 |
U2/1 |
U2/2 |
150MHz |
60MHz |
2x |
2 & 3 |
Open |
On |
Off |
166MHz |
66MHz |
2x |
2 & 3 |
Open |
On |
Off |
200MHz |
75MHz |
2x |
1 & 2 |
1 & 2 |
On |
Off |
| Note: Pins designated should be in the closed position. | ||||||
CPU SPEED SELECTION (IBM 6X86, CON’T) |
||||||
CPU speed |
Clock speed |
Multiplier |
U2/3 |
U2/4 |
U2/5 |
U2/6 |
150MHz |
60MHz |
2x |
Off |
On |
On |
On |
166MHz |
66MHz |
2x |
Off |
Off |
On |
On |
200MHz |
75MHz |
2x |
Off |
On |
On |
Off |
CPU SPEED SELECTION (CX 6X86MX) |
||||||
CPU speed |
Clock speed |
Multiplier |
JP3 |
JP4 |
U2/1 |
U2/2 |
166MHz |
60MHz |
2.5x |
2 & 3 |
Open |
On |
On |
200MHz |
66MHz |
2.5x |
2 & 3 |
Open |
On |
On |
200MHz |
75MHz |
2x |
1 & 2 |
1 & 2 |
On |
Off |
233MHz |
66MHz |
3x |
Open |
Open |
On |
On |
266MHz |
66MHz |
4x |
1 & 2 |
1 & 2 |
On |
On |
300MHz |
66MHz |
3.5x |
2 & 3 |
Open |
Off |
Off |
333MHz |
66MHz |
5x |
1 & 2 |
1 & 2 |
Off |
Off |
| Note: Pins designated should be in the closed position. | ||||||
CPU SPEED SELECTION (CX 6X86MX, CON’T) |
||||||
CPU speed |
Clock speed |
Multiplier |
U2/3 |
U2/4 |
U2/5 |
U2/6 |
166MHz |
60MHz |
2.5x |
Off |
On |
On |
On |
200MHz |
66MHz |
2.5x |
Off |
Off |
On |
On |
200MHz |
75MHz |
2x |
Off |
On |
On |
Off |
233MHz |
66MHz |
3x |
Off |
Off |
On |
On |
266MHz |
66MHz |
4x |
Off |
Off |
On |
Off |
300MHz |
66MHz |
3.5x |
Off |
Off |
On |
On |
333MHz |
66MHz |
5x |
Off |
Off |
On |
Off |
CPU SPEED SELECTION (IBM 6X86MX) |
||||||
CPU speed |
Clock speed |
Multiplier |
JP3 |
JP4 |
U2/1 |
U2/2 |
166MHz |
60MHz |
2.5x |
2 & 3 |
Open |
On |
On |
200MHz |
66MHz |
2.5x |
2 & 3 |
Open |
On |
On |
233MHz |
66MHz |
3x |
Open |
Open |
On |
On |
300MHz |
66MHz |
3.5x |
2 & 3 |
Open |
Off |
Off |
| Note: Pins designated should be in the closed position. | ||||||
CPU SPEED SELECTION (IBM 6X86MX, CON’T) |
||||||
CPU speed |
Clock speed |
Multiplier |
U2/3 |
U2/4 |
U2/5 |
U2/6 |
166MHz |
60MHz |
2.5x |
Off |
On |
On |
On |
200MHz |
66MHz |
2.5x |
Off |
Off |
On |
On |
233MHz |
66MHz |
3x |
Off |
Off |
On |
On |
300MHz |
66MHz |
3.5x |
Off |
Off |
On |
On |
CPU SPEED SELECTION (IDT C6) |
||||||
CPU speed |
Clock speed |
Multiplier |
JP3 |
JP4 |
U2/1 |
U2/2 |
150MHz |
75MHz |
2x |
1 & 2 |
1 & 2 |
On |
Off |
180MHz |
60MHz |
3x |
2 & 3 |
Open |
Off |
On |
| Note: Pins designated should be in the closed position. | ||||||
CPU SPEED SELECTION (IDT C6, CON’T) |
||||||
CPU speed |
Clock speed |
Multiplier |
U2/3 |
U2/4 |
U2/5 |
U2/6 |
150MHz |
75MHz |
2x |
Off |
On |
On |
Off |
180MHz |
60MHz |
3x |
Off |
On |
On |
On |
CPU SPEED SELECTION (AM K5) |
||||||
CPU speed |
Clock speed |
Multiplier |
JP3 |
JP4 |
U2/1 |
U2/2 |
100MHz |
66MHz |
1.5x |
2 & 3 |
Open |
Off |
Off |
133MHz |
66MHz |
1.5x |
2 & 3 |
Open |
Off |
Off |
166MHz |
66MHz |
2.5x |
2 & 3 |
Open |
On |
On |
| Note: Pins designated should be in the closed position. | ||||||
CPU SPEED SELECTION (AM K5, CON’T) |
||||||
CPU speed |
Clock speed |
Multiplier |
U2/3 |
U2/4 |
U2/5 |
U2/6 |
100MHz |
66MHz |
1.5x |
Off |
Off |
On |
On |
133MHz |
66MHz |
1.5x |
Off |
Off |
On |
On |
166MHz |
66MHz |
2.5x |
Off |
Off |
On |
On |
CPU SPEED SELECTION (AM K6) |
||||||
CPU speed |
Clock speed |
Multiplier |
JP3 |
JP4 |
U2/1 |
U2/2 |
166MHz |
66MHz |
2.5x |
2 & 3 |
Open |
On |
On |
200MHz |
66MHz |
3x |
2 & 3 |
Open |
Off |
On |
233MHz |
66MHz |
3.5x |
2 & 3 |
Open |
Off |
Off |
266MHz |
66MHz |
4x |
2 & 3 |
Open |
On |
Off |
300MHz |
66MHz |
4.5x |
2 & 3 |
Open |
On |
On |
| Note: Pins designated should be in the closed position. | ||||||
CPU SPEED SELECTION (AM K6, CON’T) |
||||||
CPU speed |
Clock speed |
Multiplier |
U2/3 |
U2/4 |
U2/5 |
U2/6 |
166MHz |
66MHz |
2.5x |
Off |
Off |
On |
On |
200MHz |
66MHz |
3x |
Off |
Off |
On |
On |
233MHz |
66MHz |
3.5x |
Off |
Off |
On |
On |
266MHz |
66MHz |
4x |
On |
Off |
On |
On |
300MHz |
66MHz |
4.5x |
On |
Off |
On |
On |
CPU SPEED SELECTION (AM K6-2) |
||||||
CPU speed |
Clock speed |
Multiplier |
JP3 |
JP4 |
U2/1 |
U2/2 |
266MHz |
66MHz |
4x |
2 & 3 |
Open |
On |
Off |
300MHz |
66MHz |
4.5x |
1 & 2 |
2 & 3 |
Off |
On |
333MHz |
66MHz |
5x |
1 & 2 |
2 & 3 |
Off |
Off |
| Note: Pins designated should be in the closed position. | ||||||
CPU SPEED SELECTION (AM K6-2, CON’T) |
||||||
CPU speed |
Clock speed |
Multiplier |
U2/3 |
U2/4 |
U2/5 |
U2/6 |
266MHz |
66MHz |
4x |
On |
Off |
On |
On |
300MHz |
66MHz |
4.5x |
Off |
Off |
Off |
Off |
333MHz |
66MHz |
5x |
Off |
On |
Off |
Off |
CPU SPEED SELECTION (INTEL) |
||||||
CPU speed |
Clock speed |
Multiplier |
JP3 |
JP4 |
U2/1 |
U2/2 |
100MHz |
66MHz |
1.5x |
2 & 3 |
Open |
Off |
Off |
120MHz |
60MHz |
2x |
2 & 3 |
Open |
On |
Off |
133MHz |
66MHz |
2x |
2 & 3 |
Open |
On |
Off |
150MHz |
60MHz |
2.5x |
2 & 3 |
Open |
On |
On |
166MHz |
66MHz |
2.5x |
2 & 3 |
Open |
On |
On |
200MHz |
66MHz |
3x |
2 & 3 |
Open |
Off |
On |
| Note: Pins designated should be in the closed position. | ||||||
CPU SPEED SELECTION (INTEL, CON’T) |
||||||
CPU speed |
Clock speed |
Multiplier |
U2/3 |
U2/4 |
U2/5 |
U2/6 |
100MHz |
66MHz |
1.5x |
Off |
Off |
On |
On |
120MHz |
60MHz |
2x |
Off |
On |
On |
On |
133MHz |
66MHz |
2x |
Off |
Off |
On |
On |
150MHz |
60MHz |
2.5x |
Off |
On |
On |
On |
166MHz |
66MHz |
2.5x |
Off |
Off |
On |
On |
200MHz |
66MHz |
3x |
Off |
Off |
On |
On |
CPU SPEED SELECTION (INTEL MMX) |
||||||
CPU speed |
Clock speed |
Multiplier |
JP3 |
JP4 |
U2/1 |
U2/2 |
166MHz |
66MHz |
2.5x |
2 & 3 |
Open |
On |
On |
200MHz |
66MHz |
3x |
2 & 3 |
Open |
Off |
On |
233MHz |
66MHz |
3.5x |
2 & 3 |
Open |
Off |
Off |
| Note: Pins designated should be in the closed position. | ||||||
CPU SPEED SELECTION (INTEL MMX, CON’T) |
||||||
CPU speed |
Clock speed |
Multiplier |
U2/3 |
U2/4 |
U2/5 |
U2/6 |
166MHz |
66MHz |
2.5x |
Off |
Off |
On |
On |
200MHz |
66MHz |
3x |
Off |
Off |
On |
On |
233MHz |
66MHz |
3.5x |
Off |
Off |
On |
On |
CPU VOLTAGE SELECTION |
|
Voltage |
J5 |
2.2v |
Pins 1 & 2 closed |
2.8v |
Pins 3 & 4 closed |
2.9v |
Pins 5 & 6 closed |
3.2v |
Pins 7 & 8 closed |
3.45v |
Pins 9 & 10 closed |
3.52v |
Pins 11 & 12 closed |