TEXAS MICROSYSTEMS, INC. DS486 Processor 80486SX/80486DX/80486DX2/80486DX4 Processor Speed 33/66(internal)/100(internal)MHz Chip Set Intel Video Chip Set None Maximum Onboard 128MB Memory Maximum Video MemoryNone Cache 256KB BIOS Phoenix Dimensions 337mm x 122mm I/O Options Floppy drive interface, IDE interface, SCSI interface, parallel port, PS/2 mouse interface, serial ports (2), PCI video module connector NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location SCSI interface CN1 Serial port 1 CN6 IDE interface CN2 Parallel port CN7 PS/2 mouse & CN3 PCI video module CN8 keyboard interface connector Floppy drive CN4 AT keyboard CN9 interface connector Serial port 2 CN5 Hard drive LED JP20 USER CONFIGURABLE SETTINGS Function Label Position » PCI bus speed select 33MHz JP2 Pins 2 & 3 closed PCI bus speed select 25MHz JP2 Pins 1 & 2 closed » Factory configured - do not JP4 Pins 1 & 2 closed alter » Factory configured - do not JP13 Pins 2 & 3 closed alter » Factory configured - do not JP14 Pins 2 & 3 closed alter » Factory configured - do not JP17 Unidentified alter » Factory configured - do not JP19 Unidentified alter » SCSI speed select 33MHz JP24 Pins 2 & 3 closed SCSI speed select 40MHz JP24 Pins 1 & 2 closed » Watchdog timer enabled JP25 Pins 1 & 2 closed Watchdog timer disabled JP25 Pins 2 & 3 closed » PS/2 IRQ12 enabled JP26 Pins 1 & 2 closed Next Step OS used JP26 Pins 2 & 3 closed » Monitor type select color SW1/1 On Monitor type select monochrome SW1/1 Off » Flash BIOS enabled SW1/2 Off Flash BIOS disabled SW1/2 On » CMOS memory normal operation SW1/3 Off CMOS memory clear SW1/3 On » Factory configured - do not SW1/4 Unidentified alter DRAM CONFIGURATION Size Bank 0 Bank 1 8MB (2) 1M x 36 None 16MB (2) 1M x 36 (2) 1M x 36 24MB (2) 2M x 36 (2) 1M x 36 32MB (2) 4M x 36 None 40MB (2) 4M x 36 (2) 1M x 36 48MB (2) 4M x 36 (2) 2M x 36 64MB (2) 8M x 36 None 64MB (2) 4M x 36 (2) 4M x 36 96MB (2) 8M x 36 (2) 4M x 36 128MB (2) 8M x 36 (2) 8M x 36 Note: Board also accepts x 32 SIMMs. CACHE CONFIGURATION Note: Bank 0 is factory installed and is not configurable. The location is unidentified. CACHE JUMPER CONFIGURATION Size JP8 JP9 JP16 256KB Pins 1 & 2 Pins 2 & 3 Pins 5 & 6 closed closed closed CPU TYPE SELECTION Type JP3 JP5 80486SX Pins 1 & 2 closed Pins 2 & 3 closed 80486DX Pins 2 & 3 closed Pins 2 & 3 closed 80486DX2 Pins 2 & 3 closed Pins 2 & 3 closed 80486DX4 Pins 2 & 3 closed Pins 1 & 2 closed CPU MULTIPLIER SELECTION (80486DX4 ONLY) Multiplier JP1 2x Pins 1 & 2 closed 2.5x Pins 2 & 3 closed » 3x Open SERIAL PORT 2 SELECTION Setting JP18 JP21 JP22 » RS232 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed RS422 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed RS485 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed