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# IBM CORPORATION
PC 330/350 SERIES (TYPE 65X6)
Processor Pentium
Processor Speed 75/90/100MHz
Chip Set Unidentified
Video Chip Set Unidentified
Maximum Onboard 128MB
Memory
Maximum Video 2MB
Memory
Cache 256/512KB
BIOS Unidentified
Dimensions 254mm x 218mm
I/O Options Floppy drive interface, IDE interfaces (2),
parallel port, PS/2 mouse port, serial ports
(2), VESA feature connector, VGA port, riser
slot
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------------+----------+----------------+----------|
| VGA port | CN1 | IDE interface | CN8 |
|---------------------+----------+----------------+----------|
| Parallel port | CN2 | Floppy drive | CN9 |
| | | interface | |
|---------------------+----------+----------------+----------|
| Serial port | CN3 | Voltage | J1 |
| | | regulator | |
|---------------------+----------+----------------+----------|
| Serial port | CN4 | Front panel | J1D1 |
| | | connector | |
|---------------------+----------+----------------+----------|
| PS/2 mouse port | CN5 | Front panel | J2A2 |
| | | connector | |
|---------------------+----------+----------------+----------|
| VESA feature | CN6 | Riser slot | SL1 |
| connector | | | |
|---------------------+----------+----------------+----------|
| IDE interface | CN7 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+-------+------------|
| » | Flash BIOS normal operation | J5J1 | Pins 1 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | Flash BIOS clear | J5J1 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Password normal operation | SW1/3 | Off |
|---+-----------------------------------+-------+------------|
| | Password clear | SW1/3 | On |
|---+-----------------------------------+-------+------------|
| » | CMOS memory normal operation | SW1/4 | Off |
|---+-----------------------------------+-------+------------|
| | CMOS memory clear | SW1/4 | On |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | SW1/5 | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|----------------+---------------------+---------------------|
| 8MB | (2) 1M x 36 | None |
|----------------+---------------------+---------------------|
| 16MB | (2) 2M x 36 | None |
|----------------+---------------------+---------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|----------------+---------------------+---------------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 |
|----------------+---------------------+---------------------|
| 32MB | (2) 4M x 36 | None |
|----------------+---------------------+---------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|----------------+---------------------+---------------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 |
|----------------+---------------------+---------------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 |
|----------------+---------------------+---------------------|
| 64MB | (2) 8M x 36 | None |
|----------------+---------------------+---------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|----------------+---------------------+---------------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 |
|----------------+---------------------+---------------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 |
|----------------+---------------------+---------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
|------------------------------------------------------------|
| Note: Board also accepts x 32 SIMMs. The location of banks |
| 0 & 1 are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | TAG |
|------------+---------------+---------------+---------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 | (1) 32K x 8 |
|------------+---------------+---------------+---------------|
| 512KB | (4) 64K x 8 | (4) 64K x 8 | (1) 32K x 8 |
|------------------------------------------------------------|
| Note: The location of banks 0 & 1 are unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE SWITCH CONFIGURATION |
|------------------------------------------------------------|
| Size | SW1/1 | SW1/2 |
|--------------------+--------------------+------------------|
| None | On | N/A |
|--------------------+--------------------+------------------|
| 256KB | Off | Off |
|--------------------+--------------------+------------------|
| 512KB | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+---------------------+-------------------|
| 1MB | 1MB | None |
|------------------+---------------------+-------------------|
| 2MB | 1MB | 1MB |
|------------------------------------------------------------|
| Note: Bank 0 is factory installed and is not |
| configurable. The size of the video memory chips are |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| CPU speed | Clock | Multiplier | SW1/6 | SW1/7 | SW1/8 |
| | speed | | | | |
|-----------+-----------+------------+-------+-------+-------|
| 75MHz | 50MHz | 1.5x | Off | Off | Off |
|-----------+-----------+------------+-------+-------+-------|
| 90MHz | 60MHz | 1.5x | Off | On | Off |
|-----------+-----------+------------+-------+-------+-------|
| 100MHz | 66MHz | 1.5x | Off | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU TYPE SELECTION |
|------------------------------------------------------------|
| Type | J9C1 |
|----------------------------+-------------------------------|
| » | VR | Pins 1 & 3 closed |
|---+------------------------+-------------------------------|
| | VRE | Pins 5 & 7 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ISA BUS CLOCK SPEED SELECTION |
|------------------------------------------------------------|
| CPU speed | ISA clock speed | J5J1 |
|-----------------------+-----------------+------------------|
| » | 75MHz (1/6 clock | 8.33MHz | Pins 5 & 7 open |
| | speed) | | |
|---+-------------------+-----------------+------------------|
| | 75MHz (1/8 clock | 6.25MHz | Pins 5 & 7 |
| | speed) | | closed |
|---+-------------------+-----------------+------------------|
| | 90MHz (1/6 clock | 10MHz | Pins 5 & 7 open |
| | speed) | | |
|---+-------------------+-----------------+------------------|
| » | 90MHz (1/8 clock | 7.5MHz | Pins 5 & 7 |
| | speed) | | closed |
|---+-------------------+-----------------+------------------|
| | 100MHz (1/6 clock | 11MHz | Pins 5 & 7 open |
| | speed) | | |
|---+-------------------+-----------------+------------------|
| | 100MHz (1/8 clock | 8.25MHz | Pins 5 & 7 |
| | speed) | | closed |
+------------------------------------------------------------+