J-MARK COMPUTER CORPORATION
SUPER TX
| Device Type | Mainboard | 
| Processor | CX 6X86/IBM 6X86/CX 686MX/IBM 6X86MX/AM K5/ AM K6/Pentium/Pentium MMX | 
| Processor Speed | 75/90/100/120/133/150/166/180/200/233/266/300MHz | 
| Chip Set | SIS 5598 | 
| Video Chip Set | SIS | 
| Maximum Onboard Memory | 384MB (EDO & SDRAM supported), Unified Memory Arctitecture (UMA) | 
| Maximum Video Memory | Unidentified | 
| Cache | 256/512KB | 
| BIOS | Unidentified | 
| Dimensions | 254mm x 218mm | 
| 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, VGA interface | 
 
| CONNECTIONS | |||
| Purpose | Location | Purpose | Location | 
| ATX power connector | ATX | Floppy drive interface | CN3 | 
| Turbo LED | C1 | Parallel port | CN4 | 
| Reset switch | C2 | IDE interface 2 | CN5 | 
| Speaker | C3 | IDE interface 1 | CN6 | 
| Turbo switch | C4 | IR connector | IR1 | 
| Power LED & keylock | C5 | PS/2 mouse interface | J1 | 
| IDE interface LED | C6 | VGA interface | J5 | 
| Soft off power supply | C7 | CPU fan power | J9 | 
| Serial port 1 | CN1 | 32-bit PCI slots | PC1 – PC3 | 
| Serial port 2 | CN2 | USB connector | USB | 
| USER CONFIGURABLE SETTINGS | |||
| Function | Label | Position | |
| » | Factory configured - do not alter | JP11 | Unidentified | 
| » | Factory configured - do not alter | JP12 | Unidentified | 
| » | CMOS memory normal operation | JP17 | Pins 1 & 2 closed | 
| CMOS memory clear | JP17 | Pins 2 & 3 closed | |
| Flash BIOS voltage select 12v | JP19 | Pins 1 & 2 closed | |
| Flash BIOS voltage select 5v | JP19 | Pins 2 & 3 closed | |
| SIMM CONFIGURATION | |
| Size | Bank 0 | 
| 8MB | (2) 1M x 36 | 
| 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 1 | Bank 2 | 
| 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 | 
| DIMM CONFIGURATION (CON’T) | ||
| Size | Bank 1 | Bank 2 | 
| 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. | ||
| CACHE CONFIGURATION | ||
| Size | Bank 0 | TAG | 
| 256KB | (2) 32K x 32 | (1) 32K x 8 | 
| 512KB | (2) 64K x 32 | (1) 32K x 8 | 
| CPU SPEED SELECTION (CX 6X86) | ||||||||
| CPU speed | Clock speed | Multiplier | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 | 
| 120MHz | 50MHz | 2x | On | On | On | On | Off | Off | 
| 133MHz | 55MHz | 2x | On | On | Off | On | Off | Off | 
| 150MHz | 60MHz | 2x | Off | On | On | On | Off | Off | 
| 166MHz | 66MHz | 2x | On | Off | On | On | Off | Off | 
| CPU SPEED SELECTION (IBM 6X86) | ||||||||
| CPU speed | Clock speed | Multiplier | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 | 
| 120MHz | 50MHz | 2x | On | On | On | On | Off | Off | 
| 133MHz | 55MHz | 2x | On | On | Off | On | Off | Off | 
| 150MHz | 60MHz | 2x | Off | On | On | On | Off | Off | 
| 166MHz | 66MHz | 2x | On | Off | On | On | Off | Off | 
| CPU SPEED SELECTION (CX 6X86MX) | ||||||||
| CPU speed | Clock speed | Multiplier | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 | 
| 166MHz | 60MHz | 2.5x | Off | On | On | On | On | Off | 
| 166MHz | 66MHz | 2.5x | On | Off | On | On | On | Off | 
| 233MHz | 66MHz | 3x | On | Off | On | Off | On | Off | 
| CPU SPEED SELECTION (IBM 6X86MX) | ||||||||
| CPU speed | Clock speed | Multiplier | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 | 
| 166MHz | 60MHz | 2.5x | Off | On | On | On | On | Off | 
| 166MHz | 66MHz | 2.5x | On | Off | On | On | On | Off | 
| 233MHz | 66MHz | 3x | On | Off | On | Off | On | Off | 
| CPU SPEED SELECTION (IDT C6) | ||||||||
| CPU speed | Clock speed | Multiplier | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 | 
| 150MHz | 50MHz | 3x | On | On | On | Off | On | Off | 
| 180MHz | 60MHz | 3x | Off | On | On | Off | On | Off | 
| 200MHz | 66MHz | 3x | On | Off | On | Off | On | Off | 
| CPU SPEED SELECTION (AM K5) | ||||||||
| CPU speed | Clock speed | Multiplier | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 | 
| 75MHz | 50MHz | 1.5x | On | On | On | Off | Off | Off | 
| 90MHz | 60MHz | 1.5x | Off | On | On | Off | Off | Off | 
| 100MHz | 66MHz | 1.5x | On | Off | On | Off | Off | Off | 
| 133MHz | 66MHz | 1.5x | On | Off | On | Off | Off | Off | 
| 166MHz | 66MHz | 2.5x | On | Off | On | On | On | Off | 
| CPU SPEED SELECTION (AM K6) | ||||||||
| CPU speed | Clock speed | Multiplier | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 | 
| 166MHz | 66MHz | 2.5x | On | Off | On | On | On | Off | 
| 200MHz | 66MHz | 3x | On | Off | On | Off | On | Off | 
| 233MHz | 66MHz | 3.5x | On | Off | On | Off | Off | Off | 
| 266MHz | 66MHz | 4x | On | Off | On | On | Off | On | 
| 300MHz | 66MHz | 4.5x | On | Off | On | On | On | On | 
| CPU SPEED SELECTION (INTEL) | ||||||||
| CPU speed | Clock speed | Multiplier | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 | 
| 75MHz | 50MHz | 1.5x | On | On | On | Off | Off | Off | 
| 90MHz | 60MHz | 1.5x | Off | On | On | Off | Off | Off | 
| 100MHz | 66MHz | 1.5x | On | Off | On | Off | Off | Off | 
| 120MHz | 60MHz | 2x | Off | On | On | On | Off | Off | 
| 133MHz | 66MHz | 2x | On | Off | On | On | Off | Off | 
| 150MHz | 60MHz | 2.5x | Off | On | On | On | On | Off | 
| 166MHz | 66MHz | 2.5x | On | Off | On | On | On | Off | 
| 200MHz | 66MHz | 3x | On | Off | On | Off | On | Off | 
| CPU SPEED SELECTION (INTEL MMX) | ||||||||
| CPU speed | Clock speed | Multiplier | SW1/1 | SW1/2 | SW1/3 | SW1/4 | SW1/5 | SW1/6 | 
| 166MHz | 66MHz | 2.5x | On | Off | On | On | On | Off | 
| 200MHz | 66MHz | 3x | On | Off | On | Off | On | Off | 
| 233MHz | 66MHz | 3.5x | On | Off | On | Off | Off | Off | 
| CPU VOLTAGE SELECTION | ||||
| Voltage | JP15/pins 1 & 2 | JP15/pins 3 & 4 | JP15/pins 5 & 6 | JP15/pins 7 & 8 | 
| 2.2v | Open | Closed | Open | Open | 
| 2.8v | Open | Open | Open | Closed | 
| 2.9v | Closed | Open | Open | Closed | 
| 3.2v | Open | Open | Closed | Closed | 
| 3.45v | Open | Closed | Closed | Closed | 
| 3.52v | Closed | Closed | Closed | Closed | 
| ON BOARD VIDEO SELECTION | |||
| Setting | JP1 | JP2 | JP10 | 
| Enabled | Pins 1 & 2 closed | Pins 1 & 2 closed | Pins 2 & 3 closed | 
| Disabled | Pins 2 & 3 closed | Pins 2 & 3 closed | Pins 1 & 2 closed |