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 (CON’T) | ||||
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. |