TEXAS MICROSYSTEMS, INC. PS486 Processor 80486SX/80486DX/80486DX2/80486DX4/P24D/P24T Processor Speed 33/66(internal)/100(internal)MHz Chip Set Intel Video Chip Set None Maximum Onboard 128MB Memory Maximum Video None Memory Cache 128/256KB BIOS Phoenix Dimensions 337mm x 122mm I/O Options AUI connector, floppy drive interface, IDE interface, SCSI interface, parallel port, PS/2 mouse port, serial ports (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location SCSI interface CN1 PS/2 mouse port CN7 IDE interface CN2 AUI connector CN8 Floppy drive interface CN3 AT keyboard connector CN9 Parallel port CN4 AUI receive LED JP4 Serial port 1 CN5 AUI active link LED JP5 Serial port 2 CN6 Hard drive LED JP7 USER CONFIGURABLE SETTINGS Function Label Position » Parity select DPU generation JP2 Pins 1 & 2 closed Parity select CPU generation JP2 Pins 2 & 3 closed » SCSI speed select 33MHz JP8 Pins 2 & 3 closed SCSI speed select 40MHz JP8 Pins 1 & 2 closed » Watchdog timer enabled JP16 Pins 2 & 3 closed Watchdog timer disabled JP16 Pins 1 & 2 closed » PS/2 IRQ 12 enabled JP17 Pins 1 & 2 closed Next Step OS used JP17 Pins 2 & 3 closed » PCI bus speed select 33MHz JP23 Pins 2 & 3 closed PCI bus speed select 25MHz JP23 Pins 1 & 2 closed » Factory configured - do not JP27 Unidentified alter » Monitor type select color SW1/1 On Monitor type select monochrome SW1/1 Off » Flash BIOS enabled SW1/2 On Flash BIOS disabled SW1/2 Off » 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 CACHE CONFIGURATION Note: The location of the cache is unidentified. CACHE JUMPER CONFIGURATION Size JP24 JP25 128KB Open Open 256KB Closed Closed CPU TYPE SELECTION Type JP1 JP14 JP15 JP18 80486SX Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 Pins 1 & 2 closed closed closed closed 80846DX Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed 80486DX2 Pins 1 & 2 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed 80486DX4 Pins 1 & 2 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed closed P24D Pins 2 & 3 Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 closed closed closed closed P24T Pins 2 & 3 Pins 1 & 2 Pins 1 & 2 Pins 2 & 3 closed closed closed closed CPU TYPE SELECTION Type JP22 Non SL enhanced Pins 1 & 2 closed SL enhanced Pins 2 & 3 closed CPU CACHE SELECTION CPU Cache JP6 JP12 JP19 80486SX WT/WT Pins 5 & 6 Pins 2 & 3 Closed closed closed 80486SX WT/WB Pins 1 & 2 Pins 1 & 2 Open closed closed 80846DX WT/WT Pins 5 & 6 Pins 2 & 3 Closed closed closed 80846DX WT/WB Pins 1 & 2 Pins 1 & 2 Open closed closed 80486DX2 WT/WT Pins 5 & 6 Pins 2 & 3 Closed closed closed 80486DX2 WT/WB Pins 1 & 2 Pins 1 & 2 Open closed closed 80486DX4 WT/WB Pins 5 & 6 Pins 2 & 3 Closed closed closed P24D WB/WT Pins 5 & 6 Pins 1 & 2 Closed closed closed CPU MULTIPLIER SELECTION Multiplier JP13 2x Pins 2 & 3 closed 3x Pins 1 & 2 closed SERIAL PORT 2 SELECTION Setting JP9 JP10 JP11 » 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