TEXT View Source
# 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
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| Speaker | CN1 | Turbo LED | CN5 |
|-------------------+----------+------------------+----------|
| Reset switch | CN2 | Turbo switch | JP4 |
|-------------------+----------+------------------+----------|
| Power LED & | CN3 | External battery | JP5 |
| keylock | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | NPU mode select synchronous with | JP1 | pins 2 & 3 |
| | CPU | | closed |
|---+----------------------------------+--------+------------|
| | NPU mode select synchronous with | JP1 | pins 1 & 2 |
| | oscillator installed at OSC1 | | 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 | P-0 | Bank 1 | P-1 | Bank 0 | Bank 1 |
| | 0(DIP) | | (DIP) | | (SIPP) | (SIPP) |
|-------+--------+-------+--------+-------+---------+--------|
| 512KB | (4) | (2) | NONE | NONE | NONE | NONE |
| | 44256 | 41256 | | | | |
|-------+--------+-------+--------+-------+---------+--------|
| 512KB | NONE | NONE | NONE | NONE | (2) | NONE |
| | | | | | 256K x | |
| | | | | | 9 | |
|-------+--------+-------+--------+-------+---------+--------|
| 1MB | (4) | (2) | (4) | (2) | NONE | NONE |
| | 44256 | 41256 | 44256 | 41256 | | |
|-------+--------+-------+--------+-------+---------+--------|
| 1MB | NONE | NONE | NONE | NONE | (2) | (2) |
| | | | | | 256K x | 256K x |
| | | | | | 9 | 9 |
|-------+--------+-------+--------+-------+---------+--------|
| 1.5MB | (4) | (2) | (4) | (2) | (2) | NONE |
| | 44256 | 41256 | 44256 | 41256 | 256K x | |
| | | | | | 9 | |
|-------+--------+-------+--------+-------+---------+--------|
| 2MB | (4) | (2) | (4) | (2) | NONE | NONE |
| | 44256 | 41256 | 44256 | 41256 | | |
|-------+--------+-------+--------+-------+---------+--------|
| 2MB | NONE | NONE | NONE | NONE | (2) 1M | NONE |
| | | | | | x 9 | |
|-------+--------+-------+--------+-------+---------+--------|
| 4MB | NONE | NONE | NONE | NONE | (2) 1M | (2) 1M |
| | | | | | x 9 | x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | Jumper | Jumper | Jumper | Jumper | Jumper |
| | JP8 | JP9 | JP10 | JP11 | 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. |
+------------------------------------------------------------+