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# ICL
VALUEPLUS MD-SERIES
Processor 80486SX/80487SX/80486DX/80486DX2
Processor 25/33/50(internal)/66(internal)MHz
Speed
Chip Set VIA
Max. Onboard 64MB
DRAM
Cache 64/128/256KB
BIOS AMI/Award
Dimensions 330mm x 218mm
I/O Options Parallel port, serial port, VGA port, PS/2 mouse
port, VGA feature connector, 32-bit VESA local
bus slots (2), floppy drive interface, IDE
interface
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|----------------+----------+---------------------+----------|
| Serial port 1 | CN1 | PS/2 mouse port | CN9 |
|----------------+----------+---------------------+----------|
| Floppy drive | CN2 | Chassis fan power | J1 |
| interface | | | |
|----------------+----------+---------------------+----------|
| IDE interface | CN3 | Turbo LED | J2 |
|----------------+----------+---------------------+----------|
| Parallel port | CN4 | IDE interface LED | J3 |
|----------------+----------+---------------------+----------|
| VGA feature | CN5 | Power LED & keylock | J4 |
| connector | | | |
|----------------+----------+---------------------+----------|
| PS/2 mouse | CN6 | Reset switch | J5 |
| connector | | | |
|----------------+----------+---------------------+----------|
| VGA port | CN8 | 32-bit VESA local | SL1 & |
| | | bus slots | SL2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | VGA IRQ9 disabled | J9 | Open |
|---+----------------------------------+--------+------------|
| | VGA IRQ9 enabled | J9 | Closed |
|---+----------------------------------+--------+------------|
| » | On board VGA enabled | J10 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | On board VGA disabled | J10 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J11 | Open |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JC7 | pins 2 & 3 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JK1 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JK2 | pins 1 & 2 |
| | alter | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP1 | pins 1 & 2 |
| | alter | | closed |
|------------------------------------------------------------|
| Note: The location of J9 is unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|------+-------------+-------------+------------+------------|
| 1MB | (1) 256K x | NONE | NONE | NONE |
| | 36 | | | |
|------+-------------+-------------+------------+------------|
| 2MB | (1) 256K x | (1) 256K x | NONE | NONE |
| | 36 | 36 | | |
|------+-------------+-------------+------------+------------|
| 3MB | (1) 256K x | (1) 256K x | (1) 256K x | NONE |
| | 36 | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 256K x | (1) 256K x | (1) 256K x | (1) 256K x |
| | 36 | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 4MB | (1) 1M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 5MB | (1) 1M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 6MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 7MB | (1) 1M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 8MB | (1) 1M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 12MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 1M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 16MB | (1) 4M x 36 | NONE | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 17MB | (1) 4M x 36 | (1) 256K x | NONE | NONE |
| | | 36 | | |
|------+-------------+-------------+------------+------------|
| 18MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | NONE |
| | | 36 | 36 | |
|------+-------------+-------------+------------+------------|
| 19MB | (1) 4M x 36 | (1) 256K x | (1) 256K x | (1) 256K x |
| | | 36 | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 20MB | (1) 4M x 36 | (1) 1M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 21MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 22MB | (1) 4M x 36 | (1) 1M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 24MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 28MB | (1) 4M x 36 | (1) 1M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 32MB | (1) 4M x 36 | (1) 4M x 36 | NONE | NONE |
|------+-------------+-------------+------------+------------|
| 33MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 34MB | (1) 4M x 36 | (1) 4M x 36 | (1) 256K x | (1) 256K x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 36MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 40MB | (1) 4M x 36 | (1) 4M x 36 | (1) 1M x | (1) 1M x |
| | | | 36 | 36 |
|------+-------------+-------------+------------+------------|
| 48MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | NONE |
| | | | 36 | |
|------+-------------+-------------+------------+------------|
| 64MB | (1) 4M x 36 | (1) 4M x 36 | (1) 4M x | (1) 4M x |
| | | | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 64KB | (4) 8K x 8 | (4) 8K x 8 | (2) 8K x 8 |
|------------+---------------+---------------+---------------|
| 128KB | (4) 32K x 8 | NONE | (2) 8K x 8 |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (2) 32K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JS1 | JS2 | JS3 |
|-------+-----------------+-----------------+----------------|
| 64KB | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 128KB | pins 2 & 3 | pins 1 & 2 | pins 1 & 2 |
| | closed | closed | closed |
|-------+-----------------+-----------------+----------------|
| 256KB | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
| | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE CONFIGURATION |
|------------------------------------------------------------|
| Type | JC1 | JC2 | JC3 | JK5 |
|-------------+-----------+-----------+-----------+----------|
| 80486SX-25 | pins 2 & | pins 2 & | pins 2 & | pins 3 & |
| | 3 closed | 3 closed | 3 closed | 4 closed |
|-------------+-----------+-----------+-----------+----------|
| 80487SX-25 | pins 1 & | pins 1 & | pins 2 & | pins 3 & |
| | 2 closed | 2 closed | 3 closed | 4 closed |
|-------------+-----------+-----------+-----------+----------|
| 80486DX-25 | pins 1 & | pins 1 & | pins 1 & | pins 3 & |
| | 2 closed | 2 closed | 2 closed | 4 closed |
|-------------+-----------+-----------+-----------+----------|
| 80486DX-33 | pins 1 & | pins 1 & | pins 1 & | pins 1 & |
| | 2 closed | 2 closed | 2 closed | 2, 7 & 8 |
| | | | | closed |
|-------------+-----------+-----------+-----------+----------|
| 80486DX2-50 | pins 1 & | pins 1 & | pins 1 & | pins 3 & |
| | 2 closed | 2 closed | 2 closed | 4 closed |
|-------------+-----------+-----------+-----------+----------|
| 80486DX2-66 | pins 1 & | pins 1 & | pins 1 & | pins 1 & |
| | 2 closed | 2 closed | 2 closed | 2, 7 & 8 |
| | | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB | (1) 256K x 16 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (1) 256K x 16 | (1) 256K x 16 |
+------------------------------------------------------------+