HEDAKA
HED-988
Processor | 80286 |
Processor Speed | 12/16/20MHz |
Chip Set | HEDAKA |
Max. Onboard DRAM | 4MB |
SRAM Cache | None |
BIOS | AMI |
Dimensions | 330.2mm x 218.4mm |
I/O Options | None |
NPU Options | 80287 |
CONNECTIONS | |||
Purpose | Location | Purpose | Location |
Speaker | CN1 | Turbo LED | CN5 |
Reset switch | CN2 | Turbo switch | JP4 |
Power LED & keylock | CN3 | External battery | JP5 |
USER CONFIGURABLE SETTINGS | |||
Function | Jumper | Position | |
» | NPU mode select synchronous with CPU | JP1 | pins 2 & 3 closed |
NPU mode select synchronous with oscillator installed at OSC1 | JP1 | pins 1 & 2 closed | |
» | NPU speed select iOSC/3 | JP2 | pins 2 & 3 closed |
NPU speed select iOSC/1 | JP2 | pins 1 & 2 closed | |
» | Monitor type select color | JP6 | pins 2 & 3 closed |
Monitor type select monochrome | JP6 | pins 1 & 2 closed | |
» | CMOS memory normal operation | JP7 | open |
CMOS memory clear | JP7 | closed | |
» | Parity check enabled | JP13 | open |
Parity check disabled | JP13 | closed | |
Note:When JP7 is closed it also disables the password set in the CMOS |
DRAM CONFIGURATION | ||||||
Size | Bank 0(DIP) | P-0 | Bank 1 (DIP) | P-1 | Bank 0 (SIPP) | Bank 1 (SIPP) |
512KB | (4) 44256 | (2) 41256 | NONE | NONE | NONE | NONE |
512KB | NONE | NONE | NONE | NONE | (2) 256K x 9 | NONE |
1MB | (4) 44256 | (2) 41256 | (4) 44256 | (2) 41256 | NONE | NONE |
1MB | NONE | NONE | NONE | NONE | (2) 256K x 9 | (2) 256K x 9 |
1.5MB | (4) 44256 | (2) 41256 | (4) 44256 | (2) 41256 | (2) 256K x 9 | NONE |
2MB | (4) 44256 | (2) 41256 | (4) 44256 | (2) 41256 | NONE | NONE |
2MB | NONE | NONE | NONE | NONE | (2) 1M x 9 | NONE |
4MB | NONE | NONE | NONE | NONE | (2) 1M x 9 | (2) 1M x 9 |
DRAM JUMPER CONFIGURATION | |||||
Size | Jumper JP8 | Jumper JP9 | Jumper JP10 | Jumper JP11 | Jumper JP12 |
512KB | open | closed | closed | closed | closed |
1MB | closed | open | closed | closed | closed |
1.5MB | open | open | closed | closed | closed |
2MB | closed | closed | open | closed | closed |
2MB 1 | closed | closed | open | closed | open |
4MB | open | closed | open | closed | open |
Note 1 :Setting represents (2) 1M x 9 SIPPs installed. |