UNIDENTIFIED
JS-168A
|
Processor |
80286 (exact location unidentified) |
|
Processor Speed |
12MHz |
|
Chip Set |
Unidentified |
|
Max. Onboard DRAM |
4MB |
|
Cache |
None |
|
BIOS |
AMI/Award/ERSO/Phoenix |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
None |
|
NPU Options |
80287 (exact location unidentified) |
|
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 | |
|
Wait state select 0 wait states |
JP5 |
Closed | |
|
Wait state select 1 wait state |
JP5 |
Open | |
|
Turbo select keyboard control |
JP9 |
pins 1 & 2 closed | |
|
Turbo select controlled by SW1/1 |
JP9 |
pins 2 & 3 closed | |
|
CPU speed select low |
SW1/1 |
On | |
|
CPU speed select high |
SW1/1 |
Off | |
|
Monitor type select color |
SW1/2 |
On | |
|
Monitor type select monochrome |
SW1/2 |
Off | |
|
Parity enabled |
SW1/3 |
On | |
|
Parity disabled |
SW1/3 |
Off | |
|
EMS port address select 0E8H |
SW1/4 |
On | |
|
EMS port address select 098H |
SW1/4 |
Off | |
|
BIOS type select 27128 |
SW1/5 |
On | |
|
BIOS type select 27256 |
SW1/5 |
Off | |
|
DRAM CONFIGURATION | |||
|
Size |
Bank A |
Bank B |
Bank B/0 |
|
512KB (A) |
(18) 41256 |
NONE |
NONE |
|
512KB (B) |
NONE |
NONE |
(4) 44256 & (2) 41256 |
|
512KB (C) |
NONE |
NONE |
NONE |
|
640KB(A) |
(18) 4164 |
NONE |
(4) 44256 & (2) 41256 |
|
640KB(B) |
(18) 4164 |
NONE |
NONE |
|
640KB (C) |
NONE |
NONE |
(4) 44256 & (2) 41256 & (4) 4464 & (2) 4164 |
|
1MB (A) |
NONE |
NONE |
(8) 44256 & (4) 41256 |
|
1MB (B) |
NONE |
NONE |
NONE |
|
1MB (C) |
(18) 41256 |
NONE |
(4) 44256 & (2) 41256 |
|
1MB (D) |
(18) 41256 |
NONE |
NONE |
|
1MB (E) |
(18) 41256 |
NONE |
NONE |
|
1MB (F) |
(18) 41256 |
NONE |
NONE |
|
2MB (A) |
(18) IBM DRAM |
NONE |
NONE |
|
2MB (B) |
NONE |
NONE |
NONE |
|
4MB (A) |
NONE |
NONE |
NONE |
|
4MB (B) |
(18) 41256 |
NONE |
NONE |
|
4MB (C) |
(18) 41256 |
NONE |
NONE |
|
Note: The orientation of the DRAM banks is unidentified. | |||
|
DRAM CONFIGURATION (CONT) | ||||
|
Size |
Bank B/1 |
Bank C |
Bank C/SIM 0 |
Bank C/SIM 1 |
|
512KB (A) |
NONE |
NONE |
NONE |
NONE |
|
512KB (B) |
NONE |
NONE |
NONE |
NONE |
|
512KB (C) |
NONE |
NONE |
(2) 256K x 9 |
NONE |
|
640KB(A) |
NONE |
NONE |
NONE |
NONE |
|
640KB(B) |
NONE |
NONE |
(2) 256K x 9 |
NONE |
|
640KB (C) |
NONE |
NONE |
NONE |
NONE |
|
1MB (A) |
NONE |
NONE |
NONE |
NONE |
|
1MB (B) |
NONE |
NONE |
(2) 256K x 9 |
(2) 256K x 9 |
|
1MB (C) |
NONE |
NONE |
NONE |
NONE |
|
1MB (D) |
(4) 44256 & (2) 41256 |
NONE |
NONE |
NONE |
|
1MB (E) |
NONE |
NONE |
(2) 256K x 9 |
NONE |
|
1MB (F) |
NONE |
NONE |
NONE |
(2) 256K x 9 |
|
2MB (A) |
NONE |
NONE |
NONE |
NONE |
|
2MB (B) |
NONE |
NONE |
(2) 1M x 9 |
NONE |
|
4MB (A) |
NONE |
NONE |
(2) 1M x 9 |
(2) 1M x 9 |
|
4MB (B) |
NONE |
NONE |
(2) 1M x 9 |
NONE |
|
4MB (C) |
NONE |
NONE |
NONE |
(2) 1M x 9 |
|
Note: The orientation of the DRAM banks is unidentified. | ||||
|
DRAM JUMPER CONFIGURATION | |||
|
Size |
JP21 |
JP22 |
JP23 |
|
512KB (A) |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
512KB (B) |
N/A |
N/A |
N/A |
|
512KB (C) |
N/A |
N/A |
N/A |
|
640KB (A) |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
640KB (B) |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
640KB (C) |
N/A |
N/A |
N/A |
|
1MB (A) |
N/A |
N/A |
N/A |
|
1MB (B) |
N/A |
N/A |
N/A |
|
1MB (C) |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
1MB (D) |
pins 2 & 3 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
1MB (E) |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
1MB (F) |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
2MB (A) |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
2MB (B) |
N/A |
N/A |
N/A |
|
4MB (A) |
N/A |
N/A |
N/A |
|
4MB (B) |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
4MB (C) |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
DRAM SWITCH CONFIGURATION | |||
|
Size |
SW1/6 |
SW1/7 |
SW1/8 |
|
512KB |
On |
On |
On |
|
640KB |
On |
On |
Off |
|
640KB + 384KB |
On |
Off |
On |
|
640KB + 384KB (EMS) |
On |
Off |
Off |
|
640KB + 1408KB |
Off |
On |
On |
|
640KB + 1408KB (EMS) |
Off |
On |
Off |
|
640KB + 3456KB |
Off |
Off |
On |
|
640KB + 3456KB (EMS) |
Off |
Off |
Off |
|
KEYBOARD BIOS PIN CONFIGURATION | ||||
|
Pin |
JP1 |
JP2 |
JP3 |
JP4 |
|
23 |
Open |
Open |
Closed |
Open |
|
27 |
Open |
Closed |
Open |
Open |
|
30 |
Open |
Open |
Open |
Closed |
|
32 |
Closed |
Open |
Open |
Open |
|
MISCELLANEOUS TECHNICAL NOTE |
|
Note: The location of pin 1 is unidentified. |