INFORMTECH INTERNATIONAL, INC. INTEL PCI Processor 80486SX/80487SX/80486DX/Pentium Overdrive Processor Speed 25/33MHz Chip Set Intel Max. Onboard DRAM 64MB Cache 64/128/256/512KB BIOS AMI Dimensions 330mm x 218mm I/O Options 32-bit PCI bus slots (3) NPU Options None [Image] CONNECTIONS Purpose Location Purpose Location SCSI bus LED CN1 32-bit PCI bus slot PCI2 Turbo switch J4 32-bit PCI bus slot PCI3 Turbo LED J5 Speaker SPK Power LED & keylock KLOCK Reset switch RST 32-bit PCI bus slot PCI1 USER CONFIGURABLE SETTINGS Function Jumper Position » CMOS memory normal operation CMOS Closed CMOS memory clear CMOS Open » Factory configured - do not J9 Closed alter » External cache installed J17 pins 2 & 3 closed External cache not installed J17 pins 1 & 2 closed » SCSI terminator power source J24 Closed from the system SCSI terminator power source J24 Open from peripheral device » Flash EPROM 27C020 or 27C010 JK3 pins 1 & 2 installed closed Flash EPROM 27C512 installed JK3 pins 2 & 3 closed Note:The location of CMOS jumper is unidentified. DRAM CONFIGURATION Size Bank 0 Bank 1 2MB (2) 256K x 36 NONE 4MB (2) 256K x 36 (2) 256K x 36 4MB (2) 512K x 36 NONE 6MB (2) 256K x 36 (2) 512K x 36 6MB (2) 512K x 36 (2) 256K x 36 8MB (2) 512K x 36 (2) 512K x 36 8MB (2) 1M x 36 NONE 10MB (2) 256K x 36 (2) 1M x 36 10MB (2) 1M x 36 (2) 256K x 36 12MB (2) 512K x 36 (2) 1M x 36 12MB (2) 1M x 36 (2) 512K x 36 16MB (2) 1M x 36 (2) 1M x 36 16MB (2) 2M x 36 NONE 18MB (2) 256K x 36 (2) 2M x 36 18MB (2) 2M x 36 (2) 256K x 36 20MB (2) 512K x 36 (2) 2M x 36 20MB (2) 2M x 36 (2) 512K x 36 24MB (2) 1M x 36 (2) 2M x 36 24MB (2) 2M x 36 (2) 1M x 36 32MB (2) 2M x 36 (2) 2M x 36 32MB (2) 4M x 36 NONE 34MB (2) 256K x 36 (2) 4M x 36 34MB (2) 4M x 36 (2) 256K x 36 36MB (2) 512K x 36 (2) 4M x 36 36MB (2) 4M x 36 (2) 512K x 36 40MB (2) 1M x 36 (2) 4M x 36 40MB (2) 4M x 36 (2) 1M x 36 48MB (2) 2M x 36 (2) 4M x 36 48MB (2) 4M x 36 (2) 2M x 36 64MB (2) 4M x 36 (2) 4M x 36 CACHE CONFIGURATION Size Bank 0 Bank 1 TAG 64KB (4) 8K x 8 (4) 8K x 8 (1) 8K x 8 128KB (4) 32K x 8 None (1) 8K x 8 256KB (4) 32K x 8 (4) 32K x 8 (1) 32K x 8 512KB (4) 128K x 8 None (1) 32K x 8 CACHE JUMPER CONFIGURATION Size J6 J7 J8 J11 J18 J19 64KB Open Open Open pins 2 & pins 1 & pins 1 & 3 closed 2 closed 2 closed 128KB Closed Open Open pins 1 & pins 2 & pins 1 & 2 closed 3 closed 2 closed 256KB Closed Closed Open pins 1 & pins 1 & pins 2 & 2 closed 2 closed 3 closed 512KB Closed Closed Closed pins 1 & pins 2 & pins 2 & 2 closed 3 closed 3 closed . CPU TYPE CONFIGURATION (CONT.) Type J106 J107 J109 SL-enhanced CPU Closed Closed pins 2 & 3 closed Normal CPU N/A N/A pins 1 & 2 closed . CPU TYPE CONFIGURATION (CONT.) Type KC1 KC2 KC3 KC4 KC5 JF J20 J21 80486SX Open Open Open Closed Open Closed 2 & 1 & 3 2 80487SX Open Closed Closed Open Closed Closed 2 & 1 & 3 2 80486DX Closed Open Closed Open Closed Closed 2 & 1 & 3 2 Pentium Open Closed Closed Open Closed Open 2 & 1 & Overdrive 3 2 Note:Pins designated should be in the closed position. CPU SPEED CONFIGURATION Speed JP3 J12 J13 25MHz Closed pins 1 & 2 pins 2 & 3 closed closed 33MHz Closed pins 1 & 2 pins 1 & 2 closed closed VESA WAIT STATE/BUS SPEED CONFIGURATION Speed Wait states J14 £ 33MHz 0 wait states pins 2 & 3 closed > 33MHz 1 wait state pins 1 & 2 closed PCI SLAVE/MASTERSLAVE CONFIGURATION Slot Type J102 J103 J104 J105 1 Slave N/A N/A Pins 1 & Pins 1 & 2 2 1 Master N/A N/A Pins 2 & Pins 2 & 3 3 2 Slave N/A N/A Pins 2 & Pins 2 & 3 3 2 Master N/A N/A Pins 1 & Pins 1 & 2 2 3 Slave Pins 2 & Pins 2 & N/A N/A 3 3 3 Master Pins 1 & Pins 1 & N/A N/A 2 2 SCSI Slave Pins 1 & Pins 1 & N/A N/A 2 2 SCSI Master Pins 2 & Pins 2 & N/A N/A 3 3 Note:Pins designated should be in the closed position. PCI IRQ INTERRUPT SELECT PCI1 J37 J36 J39 J40 J42 J43 PCI-1-INTA pins 1 pins 1 pins 1 pins 1 pins 1 pins 1 & & 2 & 2 & 2 & 2 & 2 2 PCI-2-INTA pins 2 pins 1 pins 2 pins 2 pins 2 pins 2 & & 3 & 2 & 3 & 3 & 3 3 PCI-2-INTA pins 2 pins 1 pins 2 pins 2 pins 2 pins 2 & & 3 & 2 & 4 & 4 & 4 4 Note:Pins designated should be in the closed position. For every INTA signal, only one of IRQ5-IRQ15 should be connected. ON BOARD SCSI CONFIGURATION SCSI J2 J3 Enabled Closed Closed Disabled Open Open Note:When the on board SCSI is disconnected from the power, the power cost should go down.