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# IBM CORPORATION
PC300 (TYPE 6272, 6282)
Device Type Mainboard
Processor Pentium
Processor Speed 75/90/100/120/133/150/166/200/233MHz
Chip Set Unidentified
Video Chip Set Unidentified
Maximum Onboard 128MB (EDO & SDRAM supported)
Memory
Maximum Video Unidentified
Memory
Cache 256/512KB
BIOS Unidentified
Dimensions 330mm x 218mm
I/O Options Ethernet 10BaseT connector, AUI connector,
floppy drive interface, IDE interfaces (2),
parallel port, PS/2 mouse port, serial ports
(2), VGA feature connector, VGA port, riser
slot, cache slot, USB connectors (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| 5v power | C1 | Serial port 2 | CN8 |
|-------------------+----------+------------------+----------|
| 5v auxiliary | C2 | AUI connector | CN9 |
| power | | | |
|-------------------+----------+------------------+----------|
| LAN LED | C4 | Floppy drive | CN10 |
| | | interface | |
|-------------------+----------+------------------+----------|
| Chassis fan power | C5 | IDE interface 1 | CN11 |
|-------------------+----------+------------------+----------|
| 3.3v power | C6 | IDE interface 2 | CN12 |
|-------------------+----------+------------------+----------|
| VGA port | CN1 | VGA feature | CN13 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Parallel port | CN2 | Power switch | J7 |
| | | connector | |
|-------------------+----------+------------------+----------|
| USB connector 2 | CN3 | Power LED/IDE | J8 |
| | | interface LED | |
|-------------------+----------+------------------+----------|
| USB connector 1 | CN4 | Wake on modem | J27 |
| | | connector | |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | CN5 | Wake on LAN | J28 |
| | | connector | |
|-------------------+----------+------------------+----------|
| Serial port 1 | CN6 | Riser slot | SL1 |
|-------------------+----------+------------------+----------|
| Ethernet 10BaseT | CN7 | Cache slot | SL2 |
| connector | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|---------------------------------------+-------+------------|
| » | CMOS memory normal operation | J6 | Pins 1 & 2 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| | CMOS memory clear | J6 | Pins 2 & 3 |
| | | | closed |
|---+-----------------------------------+-------+------------|
| » | Factory configured - do not alter | SW1/5 | Off |
|---+-----------------------------------+-------+------------|
| » | Floppy drive normal operation | SW1/6 | Off |
|---+-----------------------------------+-------+------------|
| | Floppy drive read only | SW1/6 | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 8MB | (1) 1M x 64 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 2M x 64 | None |
|------------------+--------------------+--------------------|
| 16MB | (1) 1M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 24MB | (1) 2M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 32MB | (1) 4M x 64 | None |
|------------------+--------------------+--------------------|
| 32MB | (1) 2M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 40MB | (1) 4M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 48MB | (1) 4M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 64MB | (1) 8M x 64 | None |
|------------------+--------------------+--------------------|
| 64MB | (1) 4M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 72MB | (1) 8M x 64 | (1) 1M x 64 |
|------------------+--------------------+--------------------|
| 80MB | (1) 8M x 64 | (1) 2M x 64 |
|------------------+--------------------+--------------------|
| 96MB | (1) 8M x 64 | (1) 4M x 64 |
|------------------+--------------------+--------------------|
| 128MB | (1) 8M x 64 | (1) 8M x 64 |
|------------------------------------------------------------|
| Note: Board accepts EDO & SDRAM memory. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | SL2 |
|----------------------------+-------------------------------|
| 256KB | 256KB module installed |
|----------------------------+-------------------------------|
| 512KB | 512KB module installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Note: The size location of the video memory is |
| unidentified. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
|CPU speed|Clock speed|Multiplier|SW1/1 |SW1/2 |SW1/3 |SW1/4 |
|---------+-----------+----------+------+------+------+------|
| 75MHz | 50MHz | 1.5x | Off | Off | On | On |
|---------+-----------+----------+------+------+------+------|
| 90MHz | 60MHz | 1.5x | Off | Off | On | Off |
|---------+-----------+----------+------+------+------+------|
| 100MHz | 66MHz | 1.5x | Off | Off | Off | On |
|---------+-----------+----------+------+------+------+------|
| 120MHz | 60MHz | 2x | On | Off | On | Off |
|---------+-----------+----------+------+------+------+------|
| 133MHz | 66MHz | 2x | On | Off | Off | On |
|---------+-----------+----------+------+------+------+------|
| 150MHz | 60MHz | 2.5x | On | On | On | Off |
|---------+-----------+----------+------+------+------+------|
| 166MHz | 66MHz | 2.5x | On | On | Off | On |
|---------+-----------+----------+------+------+------+------|
| 200MHz | 66MHz | 3x | Off | On | Off | On |
|---------+-----------+----------+------+------+------+------|
| 233MHz | 66MHz | 3.5x | Off | Off | Off | On |
+------------------------------------------------------------+