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# ZEOS INTERNATIONAL, LTD.
UPGRADABLE SYSTEMS MAINBOARD
Processor 80386/80486SX/80487SX/80486DX (On proprietary CPU
cards)
Processor 20/25/33MHz
Speed
Chip Set Unidentified
Max. Onboard 32MB
DRAM
Cache 128KB
BIOS Award
Dimensions 330mm x 218mm
I/O Options floppy drive interface, game port, IDE interface,
parallel port, serial ports (2),
proprietary CPU card slot
NPU Options 80387
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| External battery | J1 | Turbo switch | J10 |
|------------------+----------+-------------------+----------|
| Game port | J3 | Reset switch | J11 |
|------------------+----------+-------------------+----------|
| Parallel port | J5 | Turbo LED | J12 |
|------------------+----------+-------------------+----------|
| Serial port 2 | J6 | Power LED & | J13 |
| | | keylock | |
|------------------+----------+-------------------+----------|
| Serial port 1 | J7 | Speaker | J14 |
|------------------+----------+-------------------+----------|
| Floppy drive | J8 | IDE interface LED | J15 |
| interface | | | |
|------------------+----------+-------------------+----------|
| IDE interface | J9 | Proprietary CPU | CPU1 & |
| | | card slot | CPU2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Monitor type select CGA | J4 | Closed |
|---+----------------------------------+--------+------------|
| | Monitor type select Mono/EGA/VGA | J4 | Open |
|---+----------------------------------+--------+------------|
| » | Game port enabled | P1 | Closed |
|---+----------------------------------+--------+------------|
| | Game port disabled | P1 | Open |
|---+----------------------------------+--------+------------|
| » | Parallel port interupt select | PIRQ | pins 1 & 2 |
| | IRQ7 | | closed |
|---+----------------------------------+--------+------------|
| | Parallel port interupt select | PIRQ | pins 2 & 3 |
| | IRQ5 | | closed |
|---+----------------------------------+--------+------------|
| | Parallel port interupt disabled | PIRQ | all open |
|---+----------------------------------+--------+------------|
| » | Serial port 1 (COM1) interupt | SIRQ1 | pins 2 & 3 |
| | select IRQ4 | | closed |
|---+----------------------------------+--------+------------|
| | Serial port 1 (COM1) interupt | SIRQ1 | pins 1 & 2 |
| | select IRQ3 | | closed |
|---+----------------------------------+--------+------------|
| | Serial port 1 (COM1) interupt | SIRQ1 | all open |
| | disabled | | |
|---+----------------------------------+--------+------------|
| » | Serial port 2 (COM2) interupt | SIRQ2 | pins 1 & 2 |
| | select IRQ3 | | closed |
|---+----------------------------------+--------+------------|
| | Serial port 2 (COM2) interupt | SIRQ2 | pins 2 & 3 |
| | select IRQ4 | | closed |
|---+----------------------------------+--------+------------|
| | Serial port 2 (COM2) interupt | SIRQ2 | all open |
| | disabled | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (4) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (4) 256K x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 4MB | (4) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 5MB | (4) 1M x 9 | (4) 256K x 9 |
|------------------+--------------------+--------------------|
| 8MB | (4) 1M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (4) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 20MB | (4) 4M x 9 | (4) 1M x 9 |
|------------------+--------------------+--------------------|
| 32MB | (4) 4M x 9 | (4) 4M x 9 |
+------------------------------------------------------------+