TANDON CORPORATION
PCA/12
| 
 Processor  | 
 80286  | 
| 
 Processor Speed  | 
 12MHz  | 
| 
 Chip Set  | 
 Unidentified  | 
| 
 Max. Onboard DRAM  | 
 4MB  | 
| 
 Cache  | 
 None  | 
| 
 BIOS  | 
 Unidentified  | 
| 
 Dimensions  | 
 254mm x 220mm  | 
| 
 I/O Options  | 
 Parallel port, serial ports (2), floppy drive interface, IDE interface  | 
| 
 NPU Options  | 
 80287  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 External battery  | 
 J7  | 
 IDE interface  | 
 J13  | 
| 
 Speaker  | 
 J9  | 
 Serial port 2  | 
 J14  | 
| 
 Reset switch  | 
 J10  | 
 Serial port 1  | 
 J15  | 
| 
 Parallel port  | 
 J11  | 
 Floppy drive interface  | 
 J16  | 
| 
 IDE interface LED  | 
 J12  | ||
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Jumper/Switch  | 
 Position  | |
| 
 »  | 
 High speed clock disabled  | 
 E1  | 
 Closed  | 
| 
 High speed clock enabled  | 
 E1  | 
 Open  | |
| 
 »  | 
 NPU disabled  | 
 E2  | 
 pins 1 & 2 open  | 
| 
 NPU enabled  | 
 E2  | 
 pins 1 & 2 closed  | |
| 
 »  | 
 Factory configured - do not alter  | 
 E3  | 
 pins 2 & 3 closed  | 
| 
 »  | 
 256KB - 512KB memory enabled  | 
 SW1/1  | 
 Off  | 
| 
 256KB - 512KB memory disabled  | 
 SW1/1  | 
 On  | |
| 
 »  | 
 512KB - 640KB memory enabled  | 
 SW1/2  | 
 Off  | 
| 
 512KB - 640KB memory disabled  | 
 SW1/2  | 
 On  | |
| 
 »  | 
 Security enabled  | 
 SW1/3  | 
 Off  | 
| 
 Security disabled  | 
 SW1/3  | 
 On  | |
| 
 »  | 
 Factory configured - do not alter  | 
 SW1/4  | 
 Off  | 
| 
 Note: The location of E3 is unidentified.  | |||
| 
 DRAM CONFIGURATION  | ||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
| 
 512KB  | 
 (2) 256K x 9  | 
 NONE  | 
| 
 1MB  | 
 (2) 256K x 9  | 
 (2) 256K x 9  | 
| 
 2MB  | 
 (2) 1M x 9  | 
 NONE  | 
| 
 4MB  | 
 (2) 1M x 9  | 
 (2) 1M x 9  |