EPSON, INC. EQUITY 4 SERIES Processor 80486SX/80487SX/80486DX/ODP486SX/80486DX2 Processor Speed 20/25/33/50(internal)/66(internal) MHz Chip Set Toshiba Max. Onboard 32MB DRAM SRAM Cache None BIOS Award Dimensions 330mm x 218mm I/O Options Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, PS/2 keyboard connector, proprietary riser card, serial port (2), VGA feature connector, VGA port NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location PS/2 mouse port CN2 Reserved for future use CN11 PS/2 keyboard CN3 Speaker CN12 Serial port 2 CN4 Reserved for future use CN13 Serial port 1 CN5 Reserved for future use CN14 Parallel port CN6 Reserved for future use CN15 VGA port CN7 IDE interface LED CN16 VGA feature connector CN8 Power LED CN17 Floppy drive interface CN9 Proprietary riser card SLOT1 IDE interface CN10 USER CONFIGURABLE SETTINGS Function Jumper Position » Monitor type select monochrome J5 Open Monitor type select color J5 Closed » Onboard video enabled J6 pins 1 & 2 closed Onboard video disabled J6 pins 2 & 3 closed » CMOS memory normal operation J7 Open CMOS memory clear J7 Closed » Factory configured - do not alter J8 pins 1 & 2 closed » Factory configured - do not alter J13 pins 2 & 3 closed » Factory configured - do not alter J14 pins 2 & 3 closed » Factory configured - do not alter J15 pins 2 & 3 closed » Fast Gate A20 enabled J18 pins 1 & 2 closed Fast Gate A20 disabled J18 pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 1MB (1) 256K x 36 NONE 2MB (1) 256K x 36 (1) 256K x 36 4MB (1) 1M x 36 NONE 5MB (1) 256K x 36 (1) 1M x 36 8MB (1) 1M x 36 (1) 1M x 36 16MB (1) 4M x 36 NONE 17MB (1) 256K x 36 (1) 4M x 36 20MB (1) 1M x 36 (1) 4M x 36 32MB (1) 4M x 36 (1) 4M x 36 CPU SPEED CONFIGURATION Speed J19 J20 J21 J22 20MHz Closed Open Closed Open 25/50i MHz Open Open Closed Open 33/66i MHz Closed Open Open Open CPU TYPE CONFIGURATION CPU Type J10 J11 J12 J23 80486SX PQFP pins 1 & pins 1 & pins 2 & pins 1 & 2 2 3 2 80486SX PGA pins 2 & pins 2 & Open pins 2 & 3 3 3 80487SX PGA pins 1 & pins 1 & pins 2 & pins 2 & 2 2 3 3 80486DX PGA pins 1 & pins 1 & pins 1 & pins 2 & 2 2 2 3 Note:Pins designated should be in the closed position.