NEC TECHNOLOGIES, INC. BusinessMate 486/25E Processor 80486DX Processor Speed 25MHz Chip Set Intel Max. Onboard DRAM 16MB (on system memory card) Cache None BIOS NEC (flash EEPROM) Dimensions 330mm x 218mm I/O Options Proprietary serial/parallel card, keyboard/Bus mouse interface, floppy drive interface, proprietary system memory bus NPU Options 80387/3167 [Image] CONNECTIONS Purpose Location Purpose Location Proprietary system J8 Floppy drive interface P7 memory bus Speaker P1 Power supply P8 Keyboard/Bus mouse P2 Drive power supply P9 interface External battery P3 Proprietary P10 serial/parallel card Power LED & Turbo P6 Auxiliary drive power P12 LED supply Note: Either a proprietary system memory card or a proprietary memory bus expansion card may be installed at J8. The proprietary memory bus expansion card has four slots that may be populated by up to four 2MB expansion cards. USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » RDY signal from DODA select DMY 11B2 pins 1 & 2 RDY closed RDY signal from DODA select BRDY 11B2 pins 2 & 3 closed » Factory configured - do not alter 18F1 Open » EISA memory write speed select 0 18F2 Closed wait states EISA memory write speed select 1 18F2 Open wait state » CPU self-test enabled 21D1 & 4D1 pins 1 & 2 closed CPU self-test enabled 21D1 & 4D1 pins 2 & 3 closed » Floppy interface transfer rate 2D1 pins 1 & 2 500/300/250/150/125KB closed Floppy interface transfer rate 2D1 pins 2 & 3 500/300/250/150KB closed » Reset enabled 2J1 Open Reset disabled 2J1 Closed » Test mode disabled 2N2 Open Test mode enabled 2N2 Closed » Password enabled 5J2 pins 1 & 2 closed Password disabled 5J2 pins 2 & 3 closed » A20 gate output select keyboard 5J3 pins 1 & 2 controller closed A20 gate output select PAL 5J3 pins 2 & 3 (Novell workaround) closed » Keyboard controller W/R select 5K3 pins 1 & 2 PAL (Novell workaround) closed Keyboard controller W/R select 5K3 pins 2 & 3 normal XIOWT closed » Keyboard controller input select 5K4 pins 1 & 2 12HMz closed Keyboard controller input select 5K4 pins 2 & 3 8.33HMz closed » STBY signal for RTC select PWREN 6K3 pins 1 & 2 -0 closed STBY signal for RTC select PWREN 6K3 pins 2 & 3 +0 closed » ROM test mode (looping) disabled 8M2 Open ROM test mode (looping) enabled 8M2 Closed » Factory configured - do not alter 9E1 pins 2 & 3 closed » Factory configured - do not alter 9E2 pins 2 & 3 closed » Monitor type select color SW1/1 On Monitor type select monochrome SW1/1 Off » Floppy drive interface address SW1/2 Off select primary (drive A) Floppy drive interface address SW1/2 On select secondary (drive B) » Floppy drive interface enabled SW1/3 On Floppy drive interface disabled SW1/3 Off USER CONFIGURABLE SETTINGS (CON'T) Function Switch Position » Serial port (COM2) SW1/4 On enabled Serial port (COM2) SW1/4 Off disabled » Serial port (COM1) SW1/5 On enabled Serial port (COM1) SW1/5 Off disabled » Parallel port enabled SW1/6 On Parallel port disabled SW1/6 Off » NPU enabled SW1/7 On NPU disabled SW1/7 Off » Bus mouse enabled SW1/8 On Bus mouse disabled SW1/8 Off » Base memory size select SW1/9 On 640KB Base memory size select SW1/9 Off 512KB » Factory configured - do SW1/10 Off not alter Notes: Serial parallel ports are located on the proprietary serial/parallel card. MEMORY READ SPEED CONFIGURATION Wait states 18F3 19F1 0 Closed Closed 1 Open Closed 2 Closed Open 3 Open Open SYSTEM MEMORY CARD (G8FHW) [Image] DRAM CONFIGURATION Size Bank Bank Bank Bank Bank Bank Bank Bank 0 1 2 3 4 5 6 7 2MB 2MB NONE NONE NONE NONE NONE NONE NONE 4MB 2MB 2MB NONE NONE NONE NONE NONE NONE 6MB 2MB 2MB 2MB NONE NONE NONE NONE NONE 8MB 2MB 2MB 2MB 2MB NONE NONE NONE NONE 10MB 2MB 2MB 2MB 2MB 2MB NONE NONE NONE 12MB 2MB 2MB 2MB 2MB 2MB 2MB NONE NONE 14MB 2MB 2MB 2MB 2MB 2MB 2MB 2MB NONE 16MB 2MB 2MB 2MB 2MB 2MB 2MB 2MB 2MB Note: Location of Bank 0 is unidentified. Banks are filled with proprietary 2MB memory modules (NEC part # 13-260131-502-A). Either a proprietary system memory card or a proprietary memory bus expansion card may be installed at J8. The proprietary memory bus expansion card has four slots that may be populated by up to four 2MB expansion cards.