UNIDENTIFIED
TURBO MAINBOARD (4.77/10MHZ)
|
Processor |
8088 |
|
Processor Speed |
4.77/10MHz |
|
Chip Set |
Unidentified |
|
Video Chip Set |
None |
|
Maximum Onboard Memory |
640KB |
|
Maximum Video Memory |
None |
|
Cache |
None |
|
BIOS |
Unidentified |
|
Dimensions |
276mm x 196mm |
|
I/O Options |
None |
|
NPU Options |
8087 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Speaker |
JP1 |
Turbo LED |
JP5 pins 1 & 2 |
|
Keylock |
JP3 |
Power LED |
JP5 pins 3 & 4 |
|
Reset switch |
JP4 |
Turbo switch |
JP6 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Label |
Position | |
|
|
Factory configured - do not alter |
SW1/1 |
Off |
|
|
NPU not installed |
SW1/2 |
On |
|
NPU installed |
SW1/2 |
Off | |
|
|
Factory configured - do not alter |
SW1/3 |
Off |
|
|
Factory configured - do not alter |
SW1/4 |
Off |
|
DRAM CONFIGURATION | ||||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 2A |
Bank 3 |
Bank 3A |
|
256KB |
(9) 41256 |
None |
None |
None |
None |
None |
|
512KB |
(9) 41256 |
(9) 41256 |
None |
None |
None |
None |
|
576KB |
(9) 41256 |
(9) 41256 |
(2) 4464 |
(1) 4164 |
None |
None |
|
640KB |
(9) 41256 |
(9) 41256 |
(2) 4464 |
(1) 4164 |
(2) 4464 |
(1) 4164 |
|
FLOPPY DRIVE SELECTION | ||
|
Drives installed |
SW1/7 |
SW1/8 |
|
1 |
On |
On |
|
2 |
Off |
On |
|
3 |
On |
Off |
|
4 |
Off |
Off |
|
MONITOR SELECTION | ||
|
Type |
SW1/5 |
SW1/6 |
|
None |
On |
On |
|
Color (40 x 20) |
Off |
On |
|
Color (80 x 25) |
On |
Off |
|
Monochrome |
Off |
Off |
|
TURBO SELECTION | ||
|
Type |
JP7 |
JP8 |
|
Always in turbo mode |
Pins 1 & 2 closed |
Pins 2 & 3 closed |
|
Turbo select through software |
Pins 2 & 3 closed |
Pins 1 & 2 closed |
|
Turbo select through software & keyboard |
Pins 1 & 2 closed |
Pins 1 & 2 closed |
|
Note: To toggle between normal and turbo modes, press CTRL, ALT, + to enable turbo and CTRL, ALT, - to disable turbo. | ||