UNIDENTIFIED
JS-128A
|
Processor |
80286 |
|
Processor Speed |
12MHz |
|
Chip Set |
SUNTAC |
|
Max. Onboard DRAM |
4MB |
|
SRAM Cache |
None |
|
BIOS |
AMI/Award/ERSO/Phoenix |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
80287 |
|
CONNECTIONS | |||
|
Purpose |
Location |
Purpose |
Location |
|
Power LED & keylock |
J20 |
Turbo LED |
JP8 |
|
Reset switch |
JP6 |
Speaker |
JP10 |
|
Turbo switch |
JP7 | ||
|
USER CONFIGURABLE SETTINGS | |||
|
Function |
Jumper/Switch |
Position | |
|
CPU speed select fast |
DSP1/1 |
Off | |
|
CPU speed select slow |
DSP1/1 |
On | |
|
Monitor type select color |
DSP1/2 |
On | |
|
Monitor type select monochrome |
DSP1/2 |
Off | |
|
Factory configured - do not alter |
DSP1/3 |
N/A | |
|
CPU speed select fast |
DSP1/4 |
On | |
|
EMS port address select 098H |
DSP1/4 |
Off | |
|
CPU speed select fast |
DSP1/5 |
On | |
|
BIOS type select 27256 |
DSP1/5 |
Off | |
|
DRAM select 0 wait states |
JP5 |
closed | |
|
DRAM select 1 wait state |
JP5 |
open | |
|
CPU speed select fast |
JP9 |
pins 1 & 2 closed | |
|
CPU speed select switchable at turbo switch |
JP9 |
pins 2 & 3 closed | |
|
DRAM CONFIGURATION | ||
|
Size |
Bank 0 |
Bank 1 |
|
512KB |
(18) 41256 |
NONE |
|
640KB |
(18) 41256 |
(18) 4164 |
|
1MB |
(18) 41256 |
(18) 41256 |
|
1MB w/EMS |
(18) 41256 |
(18) 41256 |
|
2MB |
(18) 411000 |
NONE |
|
2MB w/EMS |
(18) 411000 |
NONE |
|
4MB |
(18) 411000 |
(18) 411000 |
|
4MB w/EMS |
(18) 411000 |
(18) 411000 |
|
DRAM SWITCH CONFIGURATION | |||
|
Size |
DSP1/6 |
DSP1/7 |
DSP1/8 |
|
512KB |
On |
On |
On |
|
640KB |
On |
On |
Off |
|
1MB |
On |
Off |
On |
|
1MB w/EMS |
On |
Off |
Off |
|
2MB |
Off |
On |
On |
|
2MB w/EMS |
Off |
On |
Off |
|
4MB |
Off |
Off |
On |
|
4MB w/EMS |
Off |
Off |
Off |
|
KEYBOARD CONFIGURATION | ||||
|
Size |
JP1 |
JP2 |
JP3 |
JP4 |
|
Pin 32 |
Closed |
Open |
Open |
Open |
|
Pin 27 |
Open |
Closed |
Open |
Open |
|
Pin 23 |
Open |
Open |
Closed |
Open |
|
Pin 30 |
Open |
Open |
Open |
Closed |