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 |