TEXAS MICRO SYSTEMS, INC. E486C Processor 80486DX/80486DX2/80486DX4 Processor 25/33/50(internal)/50/66(internal)/100(internal)MHz Speed Chip Set Unidentified Video Chip Set None Maximum 64MB Onboard Memory Maximum Video None Memory Cache 256KB BIOS Unidentified Dimensions 355mm x 304mm I/O Options Auxiliary bus slots (6), CPU slot, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location Serial port 2 J1 PS/2 mouse port J5 IDE interface J2 Parallel port J9 Serial port 1 J3 IDE interface LED JP4 Floppy drive interface J4 USER CONFIGURABLE SETTINGS Function Label Position » Factory configured - do not JP6 Pins 1 & 2, 3 & 4 alter closed » Counter timing select free JP9 Pins 2 & 3 closed running Counter timing select CPU JP9 Pins 1 & 2 closed heartbeat (ADS) » Factory configured - do not JP11 Pins 2 & 3 closed alter » Factory configured - do not JP12 Pins 2 & 3 closed alter » Factory configured - do not JP14 Open alter » PS/2 mouse IRQ 12 unbuffered JP15 Pins 1 & 2 closed PS/2 mouse IRQ 12 buffered JP15 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 I/O address select 270 SW1/4 Off I/O address select 370 SW1/4 On DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 1MB (1) 256K x None None None 36 2MB (1) 256K x (1) 256K x None None 36 36 3MB (1) 256K x (1) 256K x (1) 256K x None 36 36 36 4MB (1) 256K x (1) 256K x (1) 256K x (1) 256K x 36 36 36 36 4MB (1) 1M x 36 None None None 8MB (1) 1M x 36 (1) 1M x 36 None None 10MB (1) 1M x 36 (1) 1M x 36 (1) 256K x (1) 256K x 36 36 12MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 None 16MB (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 (1) 1M x 36 16MB (1) 4M x 36 None None None 32MB (1) 4M x 36 (1) 4M x 36 None None 32MB (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 (1) 2M x 36 48MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 None 64MB (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 (1) 4M x 36 CACHE CONFIGURATION Note: 256KB cache is factory installed and is not configurable. CPU SPEED SELECTION Speed JP5 25MHz Pins 5 & 6, 7 & 8 closed 33MHz Pins 5 & 6 closed 50iMHz Pins 5 & 6, 7 & 8 closed 50MHz Pins 1 & 2, 5 & 6 closed 66iMHz Pins 5 & 6 closed 100iMHz Pins 5 & 6 closed CPU TYPE SELECTION Type JP17 80486DX Pins 2 & 3 closed 80486DX2 Pins 2 & 3 closed 80486DX4 Pins 1 & 2 closed CPU MULTIPLIER SELECTION Multiplier JP18 2x Pins 1 & 2 closed 3x Pins 2 & 3 closed SERIAL PORT 2 SELECTION Setting JP1 JP2 JP3 » RS-232 Pins 2 & 3 Pins 2 & 3 Pins 2 & 3 closed closed closed RS-422 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed RS-485 Pins 1 & 2 Pins 1 & 2 Pins 1 & 2 closed closed closed BUS CLOCK BUFFER SELECTION Setting JP7 JP16 Unbuffered Pins 1 & 2 closed Pins 1 & 2 closed Buffered Pins 2 & 3 closed Pins 2 & 3 closed [Image] CONNECTIONS Purpose Location Purpose Location DC power J20 Front keyboard JP15 connector DC power J21 CPU slot SL1 Rear keyboard JP14 Auxiliary bus slots SL2 – SL6 connector USER CONFIGURABLE SETTINGS Function Label Position » Slot 7 card type select EISA JP1 Pins 2 & 3 closed Slot 7 card type select ISA JP1 Pins 1 & 2 closed » Slot 5 card type select EISA JP2 Pins 2 & 3 closed Slot 5 card type select ISA JP2 Pins 1 & 2 closed » Slot 3 card type select EISA JP3 Pins 2 & 3 closed Slot 3 card type select ISA JP3 Pins 1 & 2 closed » Slot 1 card type select EISA JP4 Pins 2 & 3 closed Slot 1 card type select ISA JP4 Pins 1 & 2 closed » Slot 9 card type select EISA JP5 Pins 2 & 3 closed Slot 9 card type select ISA JP5 Pins 1 & 2 closed » Slot 11 card type select EISA JP6 Pins 2 & 3 closed Slot 11 card type select ISA JP6 Pins 1 & 2 closed » Slot 13 card type select EISA JP7 Pins 2 & 3 closed Slot 13 card type select ISA JP7 Pins 1 & 2 closed » Slot 6 card type select EISA JP8 Pins 2 & 3 closed Slot 6 card type select ISA JP8 Pins 1 & 2 closed » Slot 4 card type select EISA JP9 Pins 2 & 3 closed Slot 4 card type select ISA JP9 Pins 1 & 2 closed » Slot 2 card type select EISA JP10 Pins 2 & 3 closed Slot 2 card type select ISA JP10 Pins 1 & 2 closed » Slot 8 card type select EISA JP11 Pins 2 & 3 closed Slot 8 card type select ISA JP11 Pins 1 & 2 closed » Slot 10 card type select EISA JP12 Pins 2 & 3 closed Slot 10 card type select ISA JP12 Pins 1 & 2 closed » Slot 12 card type select EISA JP13 Pins 2 & 3 closed Slot 12 card type select ISA JP13 Pins 1 & 2 closed Note: Slot 1 is located at the top of the diagram.