TANDON CORPORATION
MODEL 189370/199720
| 
 Processor  | 
 80286  | 
| 
 Processor Speed  | 
 6/8/10MHz  | 
| 
 Chip Set  | 
 Unidentified  | 
| 
 Maximum Onboard Memory  | 
 3MB (2.5MB on external memory card)  | 
| 
 Cache  | 
 None  | 
| 
 BIOS  | 
 Unidentified  | 
| 
 Dimensions  | 
 355mm x 305mm  | 
| 
 I/O Options  | 
 Serial port, parallel port  | 
| 
 NPU Options  | 
 80287  | 
| 
 CONNECTIONS  | |||
| 
 Function  | 
 Label  | 
 Function  | 
 Label  | 
| 
 Serial port  | 
 CN1  | 
 Parallel port  | 
 CN2  | 
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Setting  | 
 Label  | 
 Position  | |
| 
 Signal select DTR driven  | 
 JP1  | 
 Pins 1 & 2 closed  | |
| 
 Signal select DTR true  | 
 JP1  | 
 Pins 2 & 3 closed  | |
| 
 Signal select DTR false  | 
 JP1  | 
 Open  | |
| 
 Signal select RTS driven  | 
 JP2  | 
 Pins 1 & 2 closed  | |
| 
 Signal select RTS true  | 
 JP2  | 
 Pins 2 & 3 closed  | |
| 
 Signal select RTS false  | 
 JP2  | 
 Open  | |
| 
 Signal select DCD driven  | 
 JP3  | 
 Pins 1 & 2 closed  | |
| 
 Signal select DCD true  | 
 JP3  | 
 Pins 2 & 3 closed  | |
| 
 Signal select DCD false  | 
 JP3  | 
 Open  | |
| 
 Signal select DSR driven  | 
 JP4  | 
 Pins 1 & 2 closed  | |
| 
 Signal select DSR true  | 
 JP4  | 
 Pins 2 & 3 closed  | |
| 
 Signal select DSR false  | 
 JP4  | 
 Open  | |
| 
 Signal select CTS driven  | 
 JP5  | 
 Pins 1 & 2 closed  | |
| 
 Signal select CTS true  | 
 JP5  | 
 Pins 2 & 3 closed  | |
| 
 Signal select CTS false  | 
 JP5  | 
 Open  | |
| 
 »  | 
 Factory configured - do not alter (189370-001, 002)  | 
 JP6  | 
 Open  | 
| 
 »  | 
 Factory configured - do not alter (189370-004, 005/199270)  | 
 JP6  | 
 Open  | 
| 
 »  | 
 Factory configured - do not alter (189370-001, 002)  | 
 JP7  | 
 Open  | 
| 
 »  | 
 Factory configured - do not alter (189370-004, 005/199270  | 
 JP7  | 
 Pins 1 & 2 closed  | 
| 
 »  | 
 Factory configured - do not alter (189370-001, 002)  | 
 JP8  | 
 Pins 2 & 3 closed  | 
| 
 »  | 
 Factory configured - do not alter (189370-004, 005/199270)  | 
 JP8  | 
 Pins 1 & 2 closed  | 
| 
 »  | 
 Factory configured - do not alter (189370-001, 002)  | 
 JP9  | 
 Pins 2 & 3 closed  | 
| 
 »  | 
 Factory configured - do not alter (189370-004, 005/199270)  | 
 JP9  | 
 Pins 1 & 2 closed  | 
| 
 »  | 
 Factory configured - do not alter (189370-001, 002)  | 
 JP10  | 
 Pins 1 & 2 closed  | 
| 
 »  | 
 Factory configured - do not alter (189370-004, 005/199270)  | 
 JP10  | 
 Open  | 
| 
 »  | 
 Factory configured - do not alter (189370-001, 002)  | 
 JP11  | 
 Pins 1 & 2 closed  | 
| 
 »  | 
 Factory configured - do not alter (189370-004, 005/199270)  | 
 JP11  | 
 Pins 1 & 2 closed  | 
| 
 »  | 
 Factory configured - do not alter (189370-001, 002)  | 
 JP12  | 
 Open  | 
| 
 »  | 
 Factory configured - do not alter (189370-004, 005/199270)  | 
 JP12  | 
 Open  | 
| 
 »  | 
 Factory configured - do not alter (189370-001, 002)  | 
 JP13  | 
 Pins 1 & 2 closed  | 
| 
 »  | 
 Factory configured - do not alter (189370-004, 005/199270)  | 
 JP13  | 
 Pins 1 & 2 closed  | 
| 
 »  | 
 Factory configured - do not alter (189370-001, 002)  | 
 JP14  | 
 Pins 2 & 3 closed  | 
| 
 »  | 
 Factory configured - do not alter (189370-004, 005/199270)  | 
 JP14  | 
 Pins 1 & 2 closed  | 
| 
 0 wait state enabled (model 199720 only)  | 
 SW1/1  | 
 On  | |
| 
 0 wait state disabled (model 199720 only)  | 
 SW1/1  | 
 Off  | |
| 
 »  | 
 Factory configured - do not alter  | 
 SW1/2  | 
 N/A  | 
| 
 »  | 
 Video type select 80 characters  | 
 SW1/3  | 
 Off  | 
| 
 »  | 
 Factory configured - do not alter  | 
 SW1/4  | 
 Off  | 
| 
 USER CONFIGURABLE SETTINGS (CON’T)  | |||
| 
 Setting  | 
 Label  | 
 Position  | |
| 
 »  | 
 Factory configured - do not alter  | 
 SW1/5  | 
 N/A  | 
| 
 »  | 
 Factory configured - do not alter  | 
 SW1/6  | 
 N/A  | 
| 
 »  | 
 Factory configured - do not alter  | 
 SW1/7  | 
 N/A  | 
| 
 512KB - 640KB RAM address enabled  | 
 SW1/8  | 
 On  | |
| 
 512KB - 640KB RAM address disabled  | 
 SW1/8  | 
 Off  | |
| 
 DRAM  | 
| 
 Note: The orientation and chip sizes are unidentified.  | 
| 
 DRAM  | ||||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
 Bank 3  | 
| 
 512KB  | 
 (18) 41256  | 
 None  | 
 None  | 
 None  | 
| 
 1MB  | 
 (18) 41256  | 
 (18) 41256  | 
 None  | 
 None  | 
| 
 1.5MB  | 
 (18) 41256  | 
 (18) 41256  | 
 (18) 41256  | 
 None  | 
| 
 2MB  | 
 (18) 41256  | 
 (18) 41256  | 
 (18) 41256  | 
 (18) 41256  | 
| 
 DRAM SWITCH  | ||||||
| 
 Memory before  | 
 Memory after  | 
 SW1/1  | 
 SW1/2  | 
 SW1/3  | 
 SW1/4  | 
 SW1/5  | 
| 
 512-640KB  | 
 2560-2688KB  | 
 Off  | 
 Off  | 
 Off  | 
 On  | 
 Off  | 
| 
 1024KB  | 
 3072KB  | 
 Off  | 
 Off  | 
 Off  | 
 On  | 
 On  | 
| 
 2560-2688KB  | 
 4608-4736KB  | 
 Off  | 
 Off  | 
 On  | 
 On  | 
 Off  | 
| 
 3072KB  | 
 5120KB  | 
 Off  | 
 Off  | 
 On  | 
 On  | 
 On  | 
| 
 4608-4736KB  | 
 6656-6784KB  | 
 Off  | 
 On  | 
 Off  | 
 On  | 
 Off  | 
| 
 5120KB  | 
 7168KB  | 
 Off  | 
 On  | 
 Off  | 
 On  | 
 On  | 
| 
 656-6784KB  | 
 8704-8832KB  | 
 Off  | 
 On  | 
 On  | 
 On  | 
 Off  | 
| 
 7168KB  | 
 9216KB  | 
 Off  | 
 On  | 
 On  | 
 On  | 
 On  | 
| 
 DRAM SWITCH (CON’T)  | ||||||
| 
 Memory before  | 
 Memory after  | 
 SW1/1  | 
 SW1/2  | 
 SW1/3  | 
 SW1/4  | 
 SW1/5  | 
| 
 8704-8832KB  | 
 10752-10880KB  | 
 On  | 
 Off  | 
 Off  | 
 On  | 
 Off  | 
| 
 9216KB  | 
 11264KB  | 
 On  | 
 Off  | 
 Off  | 
 On  | 
 On  | 
| 
 10752-10880KB  | 
 12800-12928KB  | 
 On  | 
 Off  | 
 On  | 
 On  | 
 Off  | 
| 
 11264KB  | 
 13312KB  | 
 On  | 
 Off  | 
 On  | 
 On  | 
 On  | 
| 
 12800-12928KB  | 
 14848-14976KB  | 
 On  | 
 On  | 
 Off  | 
 On  | 
 Off  | 
| 
 13312KB  | 
 15360KB  | 
 On  | 
 On  | 
 Off  | 
 On  | 
 On  | 
| 
 14848-14976KB  | 
 15744KB  | 
 On  | 
 On  | 
 On  | 
 On  | 
 Off  | 
| 
 15360KB  | 
 15744KB  | 
 On  | 
 On  | 
 On  | 
 On  | 
 On  | 
| 
 MISCELLANEOUS TECHNICAL NOTE  | 
| 
 The location of pin 1 is unidentified.  |