EPSON, INC. EQUITY 486SX/25 PLUS Processor 80486SX/80487SX Processor Speed 25Mhz Chip Set Epson Max. Onboard DRAM 16MB Cache 32KB BIOS Epson Dimensions 355mm x 304mm I/O Options 32-bit external memory card, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial port, VGA port NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location PS/2 mouse port CN1 Case connector block CN13 VGA port CN3 Floppy drive CN15 interface Serial port CN4 IDE interface LED CN16 Parallel port CN5 32-bit external CN19 memory card slot Hard drive LED CN11 Chassis fan power CN21 Speaker CN12 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not JP1 pins 2 & 3 alter closed » Factory configured - do not JP2 pins 2 & 3 alter closed » Factory configured - do not JP3 pins 2 & 3 alter closed » On-board VGA adapter enabled JP4 pins 1 & 2 closed On-board VGA adapter disabled JP4 pins 2 & 3 closed » Password enabled JP5 pins 1 & 2 closed Password disabled JP5 pins 2 & 3 closed » Monitor type select color JP6 pins 1 & 2 closed Monitor type select monochrome JP6 pins 2 & 3 closed » Mouse port enabled JP7 pins 1 & 2 closed Mouse port disabled JP7 pins 2 & 3 closed » Normal IOCHRDY signal enabled JP15 pins 1 & 2 closed Early IOCHRDY signal enabled JP15 pins 2 & 3 closed DRAM CONFIGURATION Size Bank Bank Bank Bank JP8 JP9 JP10 JP11 JP12 0 1 2 3 4MB (4) NONE NONE NONE 2 & 2 & 2 & 2 & 1 & 2 4M x 3 3 3 3 9 8MB (4) (4) NONE NONE 2 & 2 & 2 & 1 & 1 & 2 4M x 4M x 3 3 3 2 9 9 9MB (4) (4) (4) NONE 1 & 2 & 2 & 1 & 1 & 2 4M x 4M x 1M x 2 3 3 2 9 9 9 10MB (4) (4) (4) (4) 1 & 1 & 2 & 1 & 1 & 2 4M x 4M x 1M x 1M x 2 2 3 2 9 9 9 9 12MB (4) (4) (4) NONE 1 & 2 & 1 & 1 & 1 & 2 4M x 4M x 4M x 2 3 2 2 9 9 9 16MB (4) (4) (4) (4) 1 & 1 & 1 & 1 & 1 & 2 4M x 4M x 4M x 4M x 2 2 2 2 9 9 9 9 Note:Pins designated should be in the closed position. Banks 0 - 3 are located on the external memory card. BASE MEMORY CONFIGURATION Size JP13 JP14 256KB pins 2 & 3 closed pins 2 & 3 closed 512KB pins 2 & 3 closed pins 1 & 2 closed 640KB pins 1 & 2 closed pins 1 & 2 closed CPU TYPE CONFIGURATION CPU JP1 JP2 JP3 80486SX pins 2 & 3 pins 2 & 3 pins 2 & 3 closed closed closed 80487SX pins 1 & 2 pins 1 & 2 pins 1 & 2 closed closed closed