J-MARK COMPUTER CORPORATION
J-656HXA
Processor | Pentium |
Processor Speed | 75/90/100/120/133/150/166/200MHz |
Chip Set | Intel |
Video Chip Set | None |
Maximum Onboard Memory | 384MB |
Maximum Video Memory | None |
Cache | 256/512KB |
BIOS | Award |
Dimensions | 280mm 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 | Reset switch | J5 |
Serial port 2 | CN2 | IDE interface LED | J6 |
Floppy drive interface | CN3 | Power LED & keylock | J7 |
Parallel port | CN4 | Turbo LED | J8 |
IDE interface 2 | CN5 | Green PC connector | JP16 |
IDE interface 1 | CN6 | Chassis fan power | JP36 |
PS/2 mouse interface | J2 | IR connector | JP37 |
Speaker | J4 | 32-bit PCI slots | PC1 – PC3 |
USER CONFIGURABLE SETTINGS | |||
Function | Label | Position | |
» | CMOS memory normal operation | J12 | Pins 2 & 3 closed |
CMOS memory clear | J12 | Pins 3 & 4 closed | |
Monitor type select color | JP2 | Closed | |
Monitor type select monochrome | JP2 | Open | |
PS/2 mouse IRQ12 enabled | JPS1 | Closed | |
PS/2 mouse IRQ12 disabled | JPS1 | Open | |
Flash BIOS voltage select 12v | JP17 | Pins 1 & 2 closed | |
Flash BIOS voltage select 5v | JP17 | Pins 2 & 3 closed | |
» | Factory configured - do not alter | JP26 | Unidentified |
» | Factory configured - do not alter | JP30 | Unidentified |
DRAM CONFIGURATION | |||
Size | Bank 0 | Bank 1 | Bank 2 |
8MB | (2) 1M x 36 | None | None |
16MB | (2) 2M x 36 | None | None |
16MB | (2) 1M x 36 | (2) 1M x 36 | None |
24MB | (2) 1M x 36 | (2) 2M x 36 | None |
24MB | (2) 1M x 36 | (2) 1M x 36 | (2) 1M x 36 |
24MB | (2) 2M x 36 | (2) 1M x 36 | None |
32MB | (2) 4M x 36 | None | None |
32MB | (2) 1M x 36 | (2) 1M x 36 | (2) 2M x 36 |
32MB | (2) 2M x 36 | (2) 2M x 36 | None |
40MB | (2) 1M x 36 | (2) 4M x 36 | None |
48MB | (2) 1M x 36 | (2) 1M x 36 | (2) 4M x 36 |
48MB | (2) 2M x 36 | (2) 4M x 36 | None |
48MB | (2) 2M x 36 | (2) 2M x 36 | (2) 2M x 36 |
64MB | (2) 8M x 36 | None | None |
64MB | (2) 2M x 36 | (2) 2M x 36 | (2) 4M x 36 |
64MB | (2) 4M x 36 | (2) 4M x 36 | None |
72MB | (2) 1M x 36 | (2) 8M x 36 | None |
DRAM CONFIGURATION (CON’T) | |||
Size | Bank 0 | Bank 1 | Bank 2 |
72MB | (2) 4M x 36 | (2) 4M x 36 | (2) 1M x 36 |
80MB | (2) 1M x 36 | (2) 1M x 36 | (2) 8M x 36 |
80MB | (2) 2M x 36 | (2) 8M x 36 | None |
80MB | (2) 4M x 36 | (2) 4M x 36 | (2) 2M x 36 |
96MB | (2) 2M x 36 | (2) 2M x 36 | (2) 8M x 36 |
96MB | (2) 4M x 36 | (2) 8M x 36 | None |
96MB | (2) 4M x 36 | (2) 4M x 36 | (2) 4M x 36 |
128MB | (2) 16M x 36 | None | None |
128MB | (2) 4M x 36 | (2) 4M x 36 | (2) 8M x 36 |
128MB | (2) 8M x 36 | (2) 8M x 36 | None |
136MB | (2) 1M x 36 | (2) 16M x 36 | None |
136MB | (2) 8M x 36 | (2) 8M x 36 | (2) 1M x 36 |
144MB | (2) 1M x 36 | (2) 1M x 36 | (2) 16M x 36 |
144MB | (2) 2M x 36 | (2) 16M x 36 | None |
144MB | (2) 8M x 36 | (2) 8M x 36 | (2) 2M x 36 |
160MB | (2) 2M x 36 | (2) 2M x 36 | (2) 16M x 36 |
160MB | (2) 4M x 36 | (2) 16M x 36 | None |
160MB | (2) 8M x 36 | (2) 8M x 36 | (2) 4M x 36 |
192MB | (2) 4M x 36 | (2) 4M x 36 | (2) 16M x 36 |
192MB | (2) 8M x 36 | (2) 16M x 36 | None |
192MB | (2) 8M x 36 | (2) 8M x 36 | (2) 8M x 36 |
256MB | (2) 8M x 36 | (2) 8M x 36 | (2) 16M x 36 |
264MB | (2) 16M x 36 | (2) 16M x 36 | (2) 1M x 36 |
272MB | (2) 16M x 36 | (2) 16M x 36 | (2) 2M x 36 |
288MB | (2) 16M x 36 | (2) 16M x 36 | (2) 4M x 36 |
320MB | (2) 16M x 36 | (2) 16M x 36 | (2) 8M x 36 |
384MB | (2) 16M x 36 | (2) 16M x 36 | (2) 16M x 36 |
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) | (2) 64K x 32 | Not installed | (1) 32K x 8 |
CACHE JUMPER CONFIGURATION | |||
Size | JP19 | JP20 | JP35 |
256KB (A) | Pins 1 & 2 closed | Pins 2 & 3 closed | Pins 1 & 2 closed |
256KB (B) | Pins 1 & 2 closed | Pins 2 & 3 closed | Pins 1 & 2 closed |
512KB (A) | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 2 & 3 closed |
512KB (B) | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 2 & 3 closed |
CPU SPEED SELECTION | |||||
CPU speed | Clock speed | Multiplier | JP22 | JP23 | JP41 |
75MHz | 50MHz | 1.5x | Open | Open | 1 & 2, 3 & 4 |
90MHz | 60MHz | 1.5x | Open | Open | 1 & 2 |
100MHz | 66MHz | 1.5x | Open | Open | 3 & 4 |
120MHz | 60MHz | 2x | Closed | Open | 1 & 2 |
133MHz | 66MHz | 2x | Closed | Open | 3 & 4 |
150MHz | 60MHz | 2.5x | Closed | Closed | 1 & 2 |
166MHz | 66MHz | 2.5x | Closed | Closed | 3 & 4 |
200MHz | 66MHz | 3x | Open | Closed | 3 & 4 |
Note: Pins designated should be in the closed position. |
CPU VOLTAGE SELECTION | |||
Voltage | JP32 | JP33 | JP34 |
3.3v | Closed | Open | Open |
3.45v | Open | Closed | Open |
3.52v | Open | Open | Closed |