JS-128A Motherboard Settings and Configuration
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 |
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