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. | |||||