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# DECISION COMPUTER INTERNATIONAL CO., LTD.
PCDISK/512KB
Card Type Memory-based disk
Maximum Onboard Memory 256KB SRAM/512KB EPROM
I/O Options Auto-reset function
Data Bus 8-bit ISA
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label |
|-----------------------------------------+------------------|
| Auto-reset connector (see pinout below) | JP5 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| JP5 PINOUT |
|------------------------------------------------------------|
| Function | Pin | Function | Pin |
|--------------------+-----+---------------------------+-----|
| To reset switch on | 1 | To reset function on | 3 |
| case | | mainboard | |
|--------------------+-----+---------------------------+-----|
| To reset switch on | 2 | To reset function on | 4 |
| case | | mainboard | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Setting | Label | Position |
|----------------------------------------+-------+-----------|
| » | Set auto-reset check time to 4.5 | JP3 | Pins 1 & |
| | seconds | | 2 closed |
|---+------------------------------------+-------+-----------|
| | Set auto-reset check time to 9 | JP3 | Pins 2 & |
| | seconds | | 3 closed |
|---+------------------------------------+-------+-----------|
| » | Battery charge enabled | JP4 | Closed |
|---+------------------------------------+-------+-----------|
| | Battery charge disabled | JP4 | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM/EPROM |
|------------------------------------------------------------|
| EPROM | SRAM | U1 | U2 | U3 | U4 |
| Size | Size | | | | |
|-------+--------+-------------+---------+---------+---------|
| None | 32KB | (1) 32K x 8 | None | None | None |
|-------+--------+-------------+---------+---------+---------|
| None | 64KB | (1) 32K x 8 | (1) 32K | None | None |
| | | | x 8 | | |
|-------+--------+-------------+---------+---------+---------|
| None | 96KB | (1) 32K x 8 | (1) 32K | (1) 32K | None |
| | | | x 8 | x 8 | |
|-------+--------+-------------+---------+---------+---------|
| None | 128KB | (1) 32K x 8 | (1) 32K | (1) 32K | (1) 32K |
| | | | x 8 | x 8 | x 8 |
|-------+--------+-------------+---------+---------+---------|
| None | 160KB | (1) 32K x 8 | (1) 32K | (1) 32K | (1) 32K |
| | | | x 8 | x 8 | x 8 |
|-------+--------+-------------+---------+---------+---------|
| None | 192KB | (1) 32K x 8 | (1) 32K | (1) 32K | (1) 32K |
| | | | x 8 | x 8 | x 8 |
|-------+--------+-------------+---------+---------+---------|
| None | 224KB | (1) 32K x 8 | (1) 32K | (1) 32K | (1) 32K |
| | | | x 8 | x 8 | x 8 |
|-------+--------+-------------+---------+---------+---------|
| None | 256KB | (1) 32K x 8 | (1) 32K | (1) 32K | (1) 32K |
| | | | x 8 | x 8 | x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM/EPROM (CON’T) |
|------------------------------------------------------------|
| EPROM | SRAM | U1 | U2 | U3 | U4 |
| Size | Size | | | | |
|----------+---------+---------+---------+---------+---------|
| 64KB | None | (1) | None | None | None |
| | | 27512 | | | |
|----------+---------+---------+---------+---------+---------|
| 64KB | 32KB | (1) | None | None | None |
| | | 27512 | | | |
|----------+---------+---------+---------+---------+---------|
| 64KB | 64KB | (1) | None | None | None |
| | | 27512 | | | |
|----------+---------+---------+---------+---------+---------|
| 64KB | 96KB | (1) | None | None | None |
| | | 27512 | | | |
|----------+---------+---------+---------+---------+---------|
| 64KB | 128KB | (1) | None | None | None |
| | | 27512 | | | |
|----------+---------+---------+---------+---------+---------|
| 128KB | None | (1) | (1) | None | None |
| | | 27512 | 27512 | | |
|----------+---------+---------+---------+---------+---------|
| 128KB | 32KB | (1) | (1) | None | None |
| | | 27512 | 27512 | | |
|----------+---------+---------+---------+---------+---------|
| 128KB | 64KB | (1) | (1) | None | None |
| | | 27512 | 27512 | | |
|----------+---------+---------+---------+---------+---------|
| 128KB | 96KB | (1) | (1) | None | None |
| | | 27512 | 27512 | | |
|----------+---------+---------+---------+---------+---------|
| 128KB | 128KB | (1) | (1) | None | None |
| | | 27512 | 27512 | | |
|----------+---------+---------+---------+---------+---------|
| 192KB | None | (1) | (1) | (1) | None |
| | | 27512 | 27512 | 27512 | |
|----------+---------+---------+---------+---------+---------|
| 192KB | 32KB | (1) | (1) | (1) | None |
| | | 27512 | 27512 | 27512 | |
|----------+---------+---------+---------+---------+---------|
| 192KB | 64KB | (1) | (1) | (1) | None |
| | | 27512 | 27512 | 27512 | |
|----------+---------+---------+---------+---------+---------|
| 192KB | 96KB | (1) | (1) | (1) | None |
| | | 27512 | 27512 | 27512 | |
|----------+---------+---------+---------+---------+---------|
| 192KB | 128KB | (1) | (1) | (1) | None |
| | | 27512 | 27512 | 27512 | |
|----------+---------+---------+---------+---------+---------|
| 256KB | None | (1) | (1) | (1) | (1) |
| | | 27512 | 27512 | 27512 | 27512 |
|----------+---------+---------+---------+---------+---------|
| 256KB | 32KB | (1) | (1) | (1) | (1) |
| | | 27512 | 27512 | 27512 | 27512 |
|----------+---------+---------+---------+---------+---------|
| 256KB | 64KB | (1) | (1) | (1) | (1) |
| | | 27512 | 27512 | 27512 | 27512 |
|----------+---------+---------+---------+---------+---------|
| 256KB | 96KB | (1) | (1) | (1) | (1) |
| | | 27512 | 27512 | 27512 | 27512 |
|----------+---------+---------+---------+---------+---------|
| 256KB | 128KB | (1) | (1) | (1) | (1) |
| | | 27512 | 27512 | 27512 | 27512 |
|----------+---------+---------+---------+---------+---------|
| 320KB | None | (1) | (1) | (1) | (1) |
| | | 27512 | 27512 | 27512 | 27512 |
|----------+---------+---------+---------+---------+---------|
| 384KB | None | (1) | (1) | (1) | (1) |
| | | 27512 | 27512 | 27512 | 27512 |
|----------+---------+---------+---------+---------+---------|
| 448KB | None | (1) | (1) | (1) | (1) |
| | | 27512 | 27512 | 27512 | 27512 |
|----------+---------+---------+---------+---------+---------|
| 512KB | None | (1) | (1) | (1) | (1) |
| | | 27512 | 27512 | 27512 | 27512 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM/EPROM (CON’T) |
|------------------------------------------------------------|
| EPROM | SRAM | U5 | U6 | U7 | U8 |
| Size | Size | | | | |
|----------+----------+---------+---------+---------+--------|
| None | 32KB | None | None | None | None |
|----------+----------+---------+---------+---------+--------|
| None | 64KB | None | None | None | None |
|----------+----------+---------+---------+---------+--------|
| None | 96KB | None | None | None | None |
|----------+----------+---------+---------+---------+--------|
| None | 128KB | None | None | None | None |
|----------+----------+---------+---------+---------+--------|
| None | 160KB | (1) 32K | None | None | None |
| | | x 8 | | | |
|----------+----------+---------+---------+---------+--------|
| None | 192KB | (1) 32K | (1) 32K | None | None |
| | | x 8 | x 8 | | |
|----------+----------+---------+---------+---------+--------|
| None | 224KB | (1) 32K | (1) 32K | (1) 32K | None |
| | | x 8 | x 8 | x 8 | |
|----------+----------+---------+---------+---------+--------|
| None | 256KB | (1) 32K | (1) 32K | (1) 32K | (1) |
| | | x 8 | x 8 | x 8 | 32K x |
| | | | | | 8 |
|----------+----------+---------+---------+---------+--------|
| 64KB | None | None | None | None | None |
|----------+----------+---------+---------+---------+--------|
| 64KB | 32KB | (1) 32K | None | None | None |
| | | x 8 | | | |
|----------+----------+---------+---------+---------+--------|
| 64KB | 64KB | (1) 32K | (1) 32K | None | None |
| | | x 8 | x 8 | | |
|----------+----------+---------+---------+---------+--------|
| 64KB | 96KB | (1) 32K | (1) 32K | (1) 32K | None |
| | | x 8 | x 8 | x 8 | |
|----------+----------+---------+---------+---------+--------|
| 64KB | 128KB | (1) 32K | (1) 32K | (1) 32K | (1) |
| | | x 8 | x 8 | x 8 | 32K x |
| | | | | | 8 |
|----------+----------+---------+---------+---------+--------|
| 128KB | None | None | None | None | None |
|----------+----------+---------+---------+---------+--------|
| 128KB | 32KB | (1) 32K | None | None | None |
| | | x 8 | | | |
|----------+----------+---------+---------+---------+--------|
| 128KB | 64KB | (1) 32K | (1) 32K | None | None |
| | | x 8 | x 8 | | |
|----------+----------+---------+---------+---------+--------|
| 128KB | 96KB | (1) 32K | (1) 32K | (1) 32K | None |
| | | x 8 | x 8 | x 8 | |
|----------+----------+---------+---------+---------+--------|
| 128KB | 128KB | (1) 32K | (1) 32K | (1) 32K | (1) |
| | | x 8 | x 8 | x 8 | 32K x |
| | | | | | 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM/EPROM (CON’T) |
|------------------------------------------------------------|
| EPROM | SRAM | U5 | U6 | U7 | U8 |
| Size | Size | | | | |
|--------+--------+------------+---------+---------+---------|
| 192KB | None | None | None | None | None |
|--------+--------+------------+---------+---------+---------|
| 192KB | 32KB | (1) 32K x | None | None | None |
| | | 8 | | | |
|--------+--------+------------+---------+---------+---------|
| 192KB | 64KB | (1) 32K x | (1) 32K | None | None |
| | | 8 | x 8 | | |
|--------+--------+------------+---------+---------+---------|
| 192KB | 96KB | (1) 32K x | (1) 32K | (1) 32K | None |
| | | 8 | x 8 | x 8 | |
|--------+--------+------------+---------+---------+---------|
| 192KB | 128KB | (1) 32K x | (1) 32K | (1) 32K | (1) 32K |
| | | 8 | x 8 | x 8 | x 8 |
|--------+--------+------------+---------+---------+---------|
| 256KB | None | None | None | None | None |
|--------+--------+------------+---------+---------+---------|
| 256KB | 32KB | (1) 32K x | None | None | None |
| | | 8 | | | |
|--------+--------+------------+---------+---------+---------|
| 256KB | 64KB | (1) 32K x | (1) 32K | None | None |
| | | 8 | x 8 | | |
|--------+--------+------------+---------+---------+---------|
| 256KB | 96KB | (1) 32K x | (1) 32K | (1) 32K | None |
| | | 8 | x 8 | x 8 | |
|--------+--------+------------+---------+---------+---------|
| 256KB | 128KB | (1) 32K x | (1) 32K | (1) 32K | (1) 32K |
| | | 8 | x 8 | x 8 | x 8 |
|--------+--------+------------+---------+---------+---------|
| 320KB | None | (1) 27512 | None | None | None |
|--------+--------+------------+---------+---------+---------|
| 384KB | None | (1) 27512 | (1) | None | None |
| | | | 27512 | | |
|--------+--------+------------+---------+---------+---------|
| 448KB | None | (1) 27512 | (1) | (1) | None |
| | | | 27512 | 27512 | |
|--------+--------+------------+---------+---------+---------|
| 512KB | None | (1) 27512 | (1) | (1) | (1) |
| | | | 27512 | 27512 | 27512 |
|------------------------------------------------------------|
| Note:The 27512 parts are EPROMs, while the 32K x 8 |
| parts are SRAMs. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SRAM/EPROM SETTINGS |
|------------------------------------------------------------|
| U1-U4 | U5-U8 | JP1 | JP2 | SW1/7 | SW1/8 |
|-------+-------+---------------+------------+-------+-------|
| EPROM | EPROM | Pins 1 & 2 | Pins 1 & 2 | Off | Off |
| | | closed | closed | | |
|-------+-------+---------------+------------+-------+-------|
| EPROM | None | Pins 1 & 2 | N/A | Off | N/A |
| | | closed | | | |
|-------+-------+---------------+------------+-------+-------|
| EPROM | SRAM | Pins 1 & 2 | Pins 2 & 3 | Off | On |
| | | closed | closed | | |
|-------+-------+---------------+------------+-------+-------|
| SRAM | SRAM | Pins 2 & 3 | Pins 2 & 3 | On | Off |
| | | closed | closed | | |
|-------+-------+---------------+------------+-------+-------|
| SRAM | None | Pins 2 & 3 | N/A | On | N/A |
| | | closed | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BASE I/O ADDRESS |
|------------------------------------------------------------|
| Setting | SW1/1 | SW1/2 | SW1/3 |
|-----------------+--------------+-------------+-------------|
| » | 1CCh | On | On | On |
|---+-------------+--------------+-------------+-------------|
| | 1DCh | Off | On | On |
|---+-------------+--------------+-------------+-------------|
| | 1ECh | On | Off | On |
|---+-------------+--------------+-------------+-------------|
| | 2CCh | Off | Off | On |
|---+-------------+--------------+-------------+-------------|
| | 2DCh | On | On | Off |
|---+-------------+--------------+-------------+-------------|
| | 2ECh | Off | On | Off |
|---+-------------+--------------+-------------+-------------|
| | 3CCh | On | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS ADDRESS |
|------------------------------------------------------------|
| Setting | SW1/4 | SW1/5 | SW1/6 |
|------------------+-------------+-------------+-------------|
| | C0000h | On | On | On |
|---+--------------+-------------+-------------+-------------|
| | C4000h | Off | On | On |
|---+--------------+-------------+-------------+-------------|
| | C8000h | On | Off | On |
|---+--------------+-------------+-------------+-------------|
| | CC000h | Off | Off | On |
|---+--------------+-------------+-------------+-------------|
| » | D0000h | On | On | Off |
|---+--------------+-------------+-------------+-------------|
| | D4000h | Off | On | Off |
|---+--------------+-------------+-------------+-------------|
| | D8000h | On | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| The function of the LED is unidentified. |
+------------------------------------------------------------+