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# ICL
AC41644/41647 MODELS E450/X450
Processor Pentium
Processor 75/90/100MHz
Speed
Chip Set OPTI
Max. Onboard 128MB
DRAM
Cache 256KB (on daughterboard)
BIOS ICL
Dimensions 330mm x 200mm
I/O Options PS/2 mouse port, parallel port, serial ports (2),
network adapter, floppy drive interface, IDE
interfaces (2), proprietary riser card slot,
sound in, sound out
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| 3.3V power | E# | IDE interface | J11 |
| connector | | (primary) | |
|-----------------+----------+--------------------+----------|
| Keyboard and | J0 | IDE interface | J12 |
| mouse PTC | | (primary) | |
|-----------------+----------+--------------------+----------|
| Parallel port | J2 | Network adapter | J13 |
|-----------------+----------+--------------------+----------|
| Serial port 1 | J3 | CPU fan | J15 |
|-----------------+----------+--------------------+----------|
| Serial port 2 | J4 | Microphone in | J16 |
|-----------------+----------+--------------------+----------|
| PS/2 mouse port | J5 | Speaker out | J17 |
|-----------------+----------+--------------------+----------|
| Hard drive LED | J6 | Unidentified | J18 |
|-----------------+----------+--------------------+----------|
| Front panel | J7 | Reset switch | JP1 pins |
| LEDs | | | 1 & 2 |
|-----------------+----------+--------------------+----------|
| Chassis fan | J8 | Proprietary riser | SL1 |
| power | | card slot | |
|-----------------+----------+--------------------+----------|
| Power switch | J9 | Cache expansion | SL2 |
| | | slot | |
|-----------------+----------+--------------------+----------|
| Floppy drive | J10 | | |
| interface | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+----------+----------|
| » | Factory configured - do not | JP1 pins | Closed |
| | alter | 9 & 10 | |
|---+----------------------------------+----------+----------|
| » | Password disabled | JP1 pins | Open |
| | | 15 & 16 | |
|---+----------------------------------+----------+----------|
| | Password enabled | JP1 pins | Closed |
| | | 15 & 16 | |
|---+----------------------------------+----------+----------|
| » | Factory configured - do not | JP1 pins | Closed |
| | alter | 17 & 18 | |
|---+----------------------------------+----------+----------|
| » | BIOS write protect enabled | JP1 pins | Open |
| | | 19 & 20 | |
|---+----------------------------------+----------+----------|
| | BIOS write protect disabled | JP1 pins | Closed |
| | | 19 & 20 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 36 | NONE |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 36 | NONE |
|------------------+--------------------+--------------------|
| 24MB | (2) 1M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4M x 36 | NONE |
|------------------+--------------------+--------------------|
| 40MB | (2) 1M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 2M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 1M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 2M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 4M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CMOS MODE CONFIGURATION |
|------------------------------------------------------------|
| Mode | JP1 |
|----------------------------+-------------------------------|
| Normal | pins 11 & 12 closed |
|----------------------------+-------------------------------|
| Clear | pins 13 & 14 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP1 pins 3 & 4 | JP1 pins 5 & 6 | JP1 pins 7 & 8 |
|---------+----------------+----------------+----------------|
| 75MHz | Closed | Closed | Open |
|---------+----------------+----------------+----------------|
| 90MHz | Closed | Open | Closed |
|---------+----------------+----------------+----------------|
| 100MHz | Open | Closed | Open |
+------------------------------------------------------------+