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)  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Parallel port  | 
 CN1  | 
 External Memory card slot  | 
 CN5  | 
| 
 VGA port  | 
 CN2  | 
 IDE interface  | 
 CN6  | 
| 
 Serial port  | 
 CN3  | 
 Floppy drive interface  | 
 CN7  | 
| 
 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 plasma display in color mode  | 
 CN8/7  | 
 On  | 
| 
 Video type select boots plasma display in monochrome mode  | 
 CN8/7  | 
 Off  | |
| 
 »  | 
 Factory configured - do not alter  | 
 CN8/8  | 
 Off  | 
| 
 »  | 
 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 alter  | 
 E2  | 
 N/A  | 
| 
 »  | 
 Printer port enabled  | 
 E7  | 
 pins 2 & 3 closed  | 
| 
 Printer port disabled  | 
 E7  | 
 pins 1 & 2 closed  | |
| 
 »  | 
 Controller address select primary  | 
 E8  | 
 pins 1 & 2, 4 & 5 closed  | 
| 
 Controller address select secondary  | 
 E8  | 
 pins 2 & 3, 4 & 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  | 
| 
 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  |