DTK COMPUTER, INC.
TURBO 640
|
Processor |
8088-2 |
|
Processor Speed |
8MHz |
|
Chip Set |
None |
|
Max. Onboard DRAM |
640K |
|
Cache |
None |
|
BIOS |
DTK/ERSO |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
8087-2 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Reset switch |
JP1 |
Turbo switch |
JP5 |
|
Power LED & turbo LED |
JP2 |
Keylock |
JP8 |
|
Speaker |
JP4 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper/Switch |
Position | |
|
Factory configured - do not alter |
SW1/switch 1 |
Off | |
|
NPU absent |
SW1/switch 2 |
Off | |
|
NPU present |
SW1/switch 2 |
On | |
|
DRAM CONFIGURATION | ||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
|
64KB |
(9) 4164 |
NONE |
NONE |
NONE |
|
128KB |
(9) 4164 |
(9) 4164 |
NONE |
NONE |
|
192KB |
(9) 4164 |
(9) 4164 |
(9) 4164 |
NONE |
|
256KB |
(9) 4164 |
(9) 4164 |
(9) 4164 |
(9) 4164 |
|
256KB |
(9) 41256 |
NONE |
NONE |
NONE |
|
512KB |
(9) 41256 |
(9) 41256 |
NONE |
NONE |
|
576KB |
(9) 41256 |
(9) 41256 |
(9) 4164 |
NONE |
|
640KB |
(9) 41256 |
(9) 41256 |
(9) 4164 |
(9) 4164 |
|
DRAM JUMPER CONFIGURATION | ||||||
|
Size |
JPA |
JPB |
JPC |
JPD |
JPE |
JPF |
|
64KB |
Closed |
Closed |
Open |
Open |
Open |
Closed |
|
128KB |
Closed |
Closed |
Open |
Open |
Open |
Closed |
|
192KB |
Closed |
Closed |
Open |
Open |
Open |
Closed |
|
256KB (using 4164) |
Closed |
Closed |
Open |
Open |
Open |
Closed |
|
256KB (using 41256) |
Open |
Open |
Closed |
Closed |
Closed |
Open |
|
512KB |
Open |
Open |
Closed |
Closed |
Closed |
Open |
|
576KB |
Open |
Open |
Closed |
Closed |
Closed |
Open |
|
640KB |
Open |
Open |
Closed |
Closed |
Closed |
Open |
|
CPU SPEED CONFIGURATION | ||
|
Setting |
JP6 |
JP7 |
|
Switchable from turbo switch |
Closed |
Open |
|
Switchable from keyboard |
Open |
Closed |
|
FLOPPY DRIVE CONFIGURATION | ||
|
Drives installed |
SW1/7 |
SW1/8 |
|
1 |
On |
On |
|
2 |
Off |
On |
|
3 |
On |
Off |
|
4 |
Off |
Off |
|
MONITOR CONFIGURATION | ||
|
Type |
SW1/5 |
SW1/6 |
|
EGA or none |
On |
On |
|
40 x 25 CGA |
Off |
On |
|
80 x 25 CGA |
On |
Off |
|
Monochrome |
Off |
Off |