UNIDENTIFIED
8MHz SYSTEM BOARD
|
Processor |
8088 |
|
Processor Speed |
4.77/8MHz |
|
Chip Set |
Unknown |
|
Max. Onboard DRAM |
640KB |
|
Cache |
None |
|
BIOS |
ATI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
8087 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Speaker |
CN1 |
Reset switch |
JP1 |
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Switch |
Position | |
|
» |
Factory configured - do not alter |
SW1/1 |
Off |
|
» |
NPU enabled |
SW1/2 |
On |
|
NPU disabled |
SW1/2 |
Off | |
|
DRAM CONFIGURATION | |||||||
|
Size |
Bank 0 |
Bank 1 |
Bank 2 |
Bank 3 |
JP3 |
SW1/3 |
SW1/4 |
|
256KB |
(9) 4164 |
(9) 4164 |
(9) 4164 |
(9) 4164 |
pins 1 & 2 |
On |
Off |
|
640KB |
(9) 41256 |
(9) 41256 |
(9) 41256 |
(9) 41256 |
pins 2 & 3 |
Off |
On |
|
Note:Pins designated should be in the closed position. The exact locations of Banks 0 through 4 is unknown. | |||||||
|
MONITOR TYPE CONFIGURATION | ||
|
Type |
SW1/5 |
SW1/6 |
|
No display adapter |
On |
On |
|
Color (40 x 20 mode) |
Off |
On |
|
Color (80 x 25 mode) |
On |
Off |
|
Monochrome or both |
Off |
Off |
|
FLOPPY DRIVES INSTALLED | ||
|
Drive(s) Installed |
SW1/switch 7 |
SW1/switch 8 |
|
1 |
On |
On |
|
2 |
Off |
On |
|
3 |
On |
Off |
|
4 |
Off |
Off |
|
CPU SPEED CONFIGURATION | |
|
Speed |
JP2 |
|
4.77MHz |
pins 2 & 3 closed |
|
8MHz |
Open |
|
Note:The system runs at 8MHz when the power is switched on but can be changed to 4mhz by pressing <CTRL> <ALT> <-> and closing pins 1 & 2. To return back to high speed, press the three keys once again. | |