HEDAKA
HED-981, HED-984
Processor | 80286 |
Processor Speed | 12MHz |
Chip Set | VLSI |
Max. Onboard DRAM | 4MB |
Cache | None |
BIOS | AMI/Award |
Dimensions | 330mm x 218mm |
I/O Options | None |
NPU Options | 80287 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Reset switch | JP1 | Turbo switch | JP4 |
Power LED & keylock | JP2 | Turbo LED | JP5 |
Speaker | JP3 | External battery | JP17 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Location | |
» | Factory configured - do not alter | JP0 | N/A |
Memory speed select 100ns | JP6 | pins 1 & 2 closed | |
» | DRAM select 0 wait states | JP10 | Closed |
DRAM select 1 wait state | JP10 | Open | |
» | BIOS type select 27256 | JP11 | pins 1 & 2 closed |
BIOS type select 27128 | JP11 | pins 2 & 3 closed | |
» | Monitor type select color | JP12 | pins 1 & 2 closed |
Monitor type select monochrome | JP12 | pins 2 & 3 closed | |
» | Factory configured - do not alter | JP13 | N/A |
» | Factory configured - do not alter | JP14 | N/A |
» | Factory configured - do not alter | JP15 | N/A |
» | Factory configured - do not alter | JP18 | N/A |
» | Battery select internal | JPA | pins 1 & 2 closed |
Battery select external | JPA | Open |
DRAM CONFIGURATION | ||||||
Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 | P-0 | P-1 |
512KB | (16) 41256 | NONE | NONE | NONE | (2) 41256 | NONE |
512KB | NONE | NONE | (4) 44256 | NONE | (2) 41256 | NONE |
640KB | NONE | (16) 4164 | (4) 44256 | NONE | (2) 41256 | (2) 4164 |
1MB | (16) 41256 | (16) 41256 | NONE | NONE | (2) 41256 | NONE |
1MB | NONE | NONE | (4) 44256 | (4) 44256 | (2) 41256 | NONE |
2MB | (16) 411000 | NONE | NONE | NONE | (2) 411000 | NONE |
4MB | (16) 411000 | (16) 411000 | NONE | NONE | (2) 411000 | (2) 411000 |
DRAM JUMPER CONFIGURATION | |||
Size | JP7 | JP8 | JP9 |
512KB | Closed | Closed | Closed |
640KB | Closed | Closed | Open |
1MB | Closed | Open | Closed |
2MB | Closed | Open | Open |
4MB | Open | Closed | Closed |