INFORMTECH INTERNATIONAL, INC. IT286SB Processor 80286 Processor Speed 5/6/8/10MHz Chip Set C & T Max. Onboard DRAM 1MB SRAM Cache None BIOS Unknown Dimensions 330mm x 218mm I/O Options None NPU Options 80287 [Image] CONNECTIONS Purpose Location Purpose Location Speaker J13 External battery J18 Power LED & keylock J16 Turbo LED J20 Reset switch J17 USER CONFIGURABLE SETTINGS Function Jumper Position » Power good signal detect from J23 pins 1 & 2 power supply closed Power good signal detect from J23 pins 2 & 3 board closed » CPU speed software selectable SW1 pins 2 & 3 closed CPU speed select 5.33/6.7MHz SW1 pins 1 & 2 closed CPU speed select 8/10MHz SW1 open » Monitor type select monochrome SW2 pins 2 & 3 closed Monitor type select color SW2 pins 1 & 2 closed DRAM CONFIGURATION Size Bank 0 Bank 1 Jumper W4 Jumper W5 256KB (18) 4164 (18) 4164 pins 1 & 2 pins 1 & 2 closed closed 512KB (18) 41256 NONE pins 2 & 3 pins 1 & 2 closed closed » 640KB (18) 41256 (18) 4164 pins 1 & 2 pins 2 & 3 closed closed 1024KB (18) 41256 (18) 41256 pins 2 & 3 pins 2 & 3 closed closed NPU CLOCK RATE CONFIGUARATION NPU Clock Rate Jumper W7 Jumper W8 80287-6 3.6/5.33MHz closed pins 1 & 2 closed 80287-6 4.46MHz closed pins 1 & 2 closed 80287-8 5.33/8MHz open pins 2 & 3 closed 80287-8 4.46/6.67MHz closed pins 1 & 2 closed 80287-10 6.67/10MHz open pins 2 & 3 closed BIOS TYPE CONFIGURATION BIOS Size Jumper W2 Jumper W3 » 27128 32K EPROM pins 2 & 3 pins 1 & 2 closed closed 27256 64K EPROM pins 1 & 2 pins 1 & 2 closed closed 23128 32K MASK ROM pins 2 & 3 pins 2 & 3 closed closed 23256 64K MASK ROM pins 1 & 2 pins 2 & 3 closed closed BATTERY TYPE CONFIGUARATION Battery J21 J22 » Internal lithium (2 x pins 1 & 2 closed open 3VDC) External lithium open closed (6VDC) External alkaline open open (6VDC)