LEADING EDGE PRODUCTS, INC. MODEL D (REVISION 7) Processor 8088 (exact location unknown) Processor Speed 4.77MHz Chip Set Unknown Max. Onboard DRAM 768KB Cache None BIOS Unknown Dimensions 254mm x 218mm I/O Options Color monitor port, floppy drive interface, light pen connector, monochrome monitor port, parallel port, serial port NPU Options 8087 [Image] CONNECTIONS Purpose Location Purpose Location Parallel port J6 Floppy drive interface J15 Serial port J7 Keyboard J18 Color monitor port J8 Speaker J19 Monochrome port J9 Reset switch J20 Light pen connector J11 Power-on LED indicator J21 USER CONFIGURABLE SETTINGS Function Jumper Position » Factory configured - do not J5 N/A alter » Monitor enabled J10 Closed Monitor disabled J10 Open » Floppy drive interface enabled J13 pins 4 & 9 closed Floppy drive interface J13 pins 4 & 9 open disabled » Serial port enabled J13 pins 5 & 10 closed Serial port disabled J13 pins 5 & 10 open » Parallel port enabled J13 pins 3 & 8 closed Parallel port disabled J13 pins 3 & 8 open » Real Time Clock enabled J13 pins 2 & 7 closed Real Time Clock disabled J13 pins 2 & 7 open » Factory configured - do not J13 pins 1 & 6 open alter » BIOS ROM type 8/16K J16 Open BIOS ROM type 32K J16 Closed » Video mode TTL mononchrome SW1 Up Video mode CGA SW1 Down » Factory configured - do not SW2/switch 1 Off alter » NPU disabled SW2/switch 2 On NPU enabled SW2/switch 2 Off » Factory configured - do not SW2/switch 3 On alter » Memory test 64KB SW2/switch 4 On Memory test all SW2/switch 4 Off » Factory configured - do not SW2/switch 5 Off alter » Factory configured - do not SW2/switch 6 Off alter Note:The exact location of J5 is unknown. DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 J23 512KB (9) 41256 (9) 41256 NONE pins 1 & 2 closed 768KB (9) 41256 (9) 41256 (9) 41256 pins 3 & 4 closed Note:Even though this system has 768KB installed, only 640KB is available to the user. FLOPPY DISK DRIVES INSTALLED Number of Drives SW2/switch 7 SW2/switch 8 1 On On 2 Off On 3 On Off 4 Off Off REAL TIME CLOCK INTERRUPT SELECT IRQ J12 2 pins 1 & 5 closed 4 pins 2 & 6 closed 5 pins 3 & 7 closed 7 pins 4 & 8 closed