UNIDENTIFIED
TURBO 640
| 
 Processor  | 
 8088  | 
| 
 Processor Speed  | 
 8MHz  | 
| 
 Chip Set  | 
 None  | 
| 
 Max. onboard DRAM  | 
 640KB  | 
| 
 Cache  | 
 None  | 
| 
 BIOS  | 
 Unknown  | 
| 
 Dimensions  | 
 330mm x 218mm  | 
| 
 I/O Options  | 
 None  | 
| 
 NPU Options  | 
 8087  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Turbo switch  | 
 JP5  | 
 Power/Turbo LED  | 
 JP9  | 
| 
 Keylock  | 
 JP8  | 
 Speaker  | 
 P4  | 
| 
 Note:The exact locations of JP5 and JP8 are unknown.  | |||
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Jumper/Switch  | 
 Position  | |
| » | 
 Factory configured - do not alter  | 
 JP1  | 
 Unknown  | 
| » | 
 Factory configured - do not alter  | 
 SW1/switch 1  | 
 Off  | 
| » | 
 NPU enabled  | 
 SW1/switch 2  | 
 Off  | 
| 
 NPU disabled  | 
 SW1/switch 2  | 
 On  | |
| 
 DRAM CONFIGURATION  | ||||||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
 Bank 3  | 
 JP3  | 
 JP4  | 
| 
 256KB  | 
 (8) 4164  | 
 (8) 4164  | 
 (8) 4164  | 
 (8) 4164  | 
 A & B closed  | 
 B closed  | 
| 
 256KB  | 
 (8) 41256  | 
 NONE  | 
 NONE  | 
 NONE  | 
 C & D closed  | 
 A closed  | 
| 
 512KB  | 
 (8) 41256  | 
 (8) 41256  | 
 NONE  | 
 NONE  | 
 C & D closed  | 
 A closed  | 
| 
 640KB  | 
 (8) 41256  | 
 (8) 41256  | 
 (8) 4164KB  | 
 (8) 4164KB  | 
 C & D closed  | 
 A closed  | 
| 
 TURBO CONFIGURATION  | ||
| 
 Mode  | 
 JP6  | 
 JP7  | 
| 
 Software switch  | 
 Open  | 
 Closed  | 
| 
 Hardware switch  | 
 Closed  | 
 Open  | 
| 
 DISPLAY CONFIGURATION  | ||||
| 
 Display Adapter  | 
 SW1/5  | 
 SW1/6  | 
 SW1/7  | 
 SW1/8  | 
| 
 None  | 
 On  | 
 On  | 
 N/A  | 
 N/A  | 
| 
 Color/Graphics (40x20)  | 
 Off  | 
 On  | 
 On  | 
 On  | 
| 
 Color/Graphics (80x25)  | 
 On  | 
 Off  | 
 On  | 
 On  | 
| 
 Monochrome or Both  | 
 Off  | 
 Off  | 
 On  | 
 On  | 
| 
 FLOPPY DRIVE CONFIGURATION  | ||
| 
 Drives Installed  | 
 SW1/7  | 
 SW1/8  | 
| 
 1  | 
 On  | 
 On  | 
| 
 2  | 
 Off  | 
 On  | 
| 
 3  | 
 On  | 
 Off  | 
| 
 4  | 
 Off  | 
 Off  |