COMPAQ COMPUTER CORPORATION PORTABLE III Processor 80286 (exact location unidentified) Processor Speed 8/12MHz Chip Set Unidentified Max. Onboard DRAM 6MB (4MB on external memory card) Cache None BIOS Unidentified Dimensions 330mm x 218mm I/O Options IDE interface, external memory card slot, floppy drive interface, parallel port, serial port, VGA port, display connector NPU Options 80287 (exact location unidentified) [Image] CONNECTIONS Purpose Location Purpose Location Parallel port CN1 External Memory card CN5 slot VGA port CN2 IDE interface CN6 Serial port CN3 Floppy drive CN7 interface Display controller CN4 USER CONFIGURABLE SETTINGS Function Jumper/Switch Position » Hard drive enabled CN8/5 On Hard drive disabled CN8/5 Off » CPU speed select 8MHz CN8/6 On CPU speed select 12MHz CN8/6 Off » Video type select boots CN8/7 On plasma display in color mode Video type select boots CN8/7 Off plasma display in monochrome mode » Factory configured - do not CN8/8 Off alter » CPU access speed select 8/12 E1 pins 1 & 2 closed CPU access speed select 8 E1 pins 2 & 3 closed » Factory configured - do not E2 N/A alter » Printer port enabled E7 pins 2 & 3 closed Printer port disabled E7 pins 1 & 2 closed » Controller address select E8 pins 1 & 2, 4 & primary 5 closed Controller address select E8 pins 2 & 3, 4 & secondary 5 closed » System ROM select 16KB E10 pins 1 & 2 closed System ROM select 32KB E10 pins 2 & 3 closed » ROM Set2 enabled E12 pins 1 & 2 closed ROM Set2 disabled E12 pins 2 & 3 closed DRAM CONFIGURATION Size Bank 0 Bank 1 256KB (1) 256K x 9 NONE 512KB (1) 256K x 9 (1) 256K x 9 1MB (1) 1M x 9 NONE 1.5MB (1) 1M x 9 (1) 256K x 9 2MB (1) 1M x 9 (1) 1M x 9 COM/IRQ CONFIGURATION COM/IRQ E5/E16 COM1/IRQ4 Serial pins 2 & 4 closed COM1/IRQ4 Modem pins 3 & 4 closed COM2/IRQ3 Serial pins 1 & 2 closed COM2/IRQ3 Modem pins 1 & 3 closed SERIAL PORT CONFIGURATION COM port E3/E4 COM1 Serial pins 1 & 2 closed COM1 Modem pins 1 & 3 closed COM2 Serial pins 1 & 3 closed COM2 Modem pins 3 & 4 closed DRAM BASE MEMORY SWITCH CONFIGURATION Size CN8/1 CN8/2 None On On 256KB On Off 512KB Off On 640KB Off Off DRAM EXTENDED MEMORY SWITCH CONFIGURATION Base memory Extended memory CN8 Switch 3 CN8 Switch 4 640KB 256KB On Off 640KB 1MB Off On DRAM BANK CONFIGURATION Bank E17 None pins 2 & 3, 4 & 5 closed Bank 1 pins 2 & 3, 5 & 6 closed Bank 1 & 2 pins 1 & 2, 4 & 5 closed Bank 1, 2, & 3 pins 1 & 2, 5 & 6 closed [Image] DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 512KB (2) 256K x 9 NONE NONE 1MB (2) 256K x 9 (2) 256K x 9 NONE 1.5MB (2) 256K x 9 (2) 256K x 9 (2) 256K x 9 2MB (2) 1M x 9 NONE NONE 4MB (2) 1M x 9 (2) 1M x 9 NONE 6MB (2) 1M x 9 (2) 1M x 9 (2) 1M x 9 DRAM CONFIGURATION Size S1 256K x 9 pins 1 & 2 closed 1M x 9 pins 2 & 3 closed