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# IBM CORPORATION
PC SERVER 520 (TYPE 8641) MODEL EZO, EZV, EZL, EZS, EZE
Processor Pentium
Processor Speed 90/100MHz
Chip Set Unidentified
Video Chip Set None
Maximum Onboard 256MB
Memory
Maximum Video None
Memory
Cache 256/512KB
BIOS Unidentified
Dimensions 355mm x 304mm
I/O Options 32-bit PCI slots (3), floppy drive interface,
IDE interface, parallel port, PS/2 mouse
port, serial ports (2)
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-------------------+----------+------------------+----------|
| PS/2 mouse port | J6 | Speaker | W12 |
|-------------------+----------+------------------+----------|
| Parallel port | J9 | Power LED & | W18 |
| | | keylock | |
|-------------------+----------+------------------+----------|
| Floppy drive | J10 | IDE interface | W24 |
| interface | | LED | |
|-------------------+----------+------------------+----------|
| Serial port 1 | J11 | CPU fan power | W35 |
|-------------------+----------+------------------+----------|
| Serial port 2 | J12 | CPU fan power | W36 |
|-------------------+----------+------------------+----------|
| IDE interface | J13 | 32-bit PCI slots | PC1 – |
| | | | PC3 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-------------------------------------+-------+--------------|
| » | Cache type select write back | W1 | Open |
|---+---------------------------------+-------+--------------|
| | Cache type select write through | W1 | Closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W2 | Open |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W10 | Pins 2 & 3 |
| | alter | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W11 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W13 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W14 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W15 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W16 | Pins 1 & 2 |
| | alter | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W17 | Closed |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Monitor type select color | W20 | Closed |
|---+---------------------------------+-------+--------------|
| | Monitor type select monochrome | W20 | Open |
|---+---------------------------------+-------+--------------|
| » | Keyboard type select PS/2 | W21 | Closed |
|---+---------------------------------+-------+--------------|
| | Keyboard type select AT | W21 | Open |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W22 | Open |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W23 | Open |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | IDE IRQ select IRQ14 | W25 | Pins 1 & 2 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| | IDE IRQ select IRQ15 | W25 | Pins 2 & 3 |
| | | | closed |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W30 | Open |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W32 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W33 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W34 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W37 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | W88 | Unidentified |
| | alter | | |
|---+---------------------------------+-------+--------------|
| » | Factory configured - do not | WU | Unidentified |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SIMM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 | Bank 2 | Bank 3 |
|-------+-------------+------------+------------+------------|
| 8MB | (2) 1M x 36 | None | None | None |
|-------+-------------+------------+------------+------------|
| 16MB | (2) 2M x 36 | None | None | None |
|-------+-------------+------------+------------+------------|
| 16MB | (2) 1M x 36 | (2) 1M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 24MB | (2) 2M x 36 | (2) 1M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 24MB | (2) 1M x 36 | (2) 1M x | (2) 1M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 32MB | (2) 4M x 36 | None | None | None |
|-------+-------------+------------+------------+------------|
| 32MB | (2) 2M x 36 | (2) 2M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 32MB | (2) 1M x 36 | (2) 1M x | (2) 1M x | (2) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 40MB | (2) 4M x 36 | (2) 1M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 48MB | (2) 4M x 36 | (2) 2M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 48MB | (2) 2M x 36 | (2) 2M x | (2) 2M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 64MB | (2) 4M x 36 | (2) 2M x | (2) 2M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 64MB | (2) 8M x 36 | None | None | None |
|-------+-------------+------------+------------+------------|
| 64MB | (2) 4M x 36 | (2) 4M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 64MB | (2) 2M x 36 | (2) 2M x | (2) 2M x | (2) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 72MB | (2) 8M x 36 | (2) 1M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 80MB | (2) 8M x 36 | (2) 1M x | (2) 1M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 80MB | (2) 4M x 36 | (2) 2M x | (2) 2M x | (2) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 80MB | (2) 8M x 36 | (2) 2M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 88MB | (2) 8M x 36 | (2) 1M x | (2) 1M x | (2) 1M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 96MB | (2) 8M x 36 | (2) 2M x | (2) 2M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 96MB | (2) 8M x 36 | (2) 4M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 96MB | (2) 4M x 36 | (2) 4M x | (2) 4M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 112MB | (2) 8M x 36 | (2) 2M x | (2) 2M x | (2) 2M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 128MB | (2) 8M x 36 | (2) 4M x | (2) 4M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 128MB | (2) 8M x 36 | (2) 8M x | None | None |
| | | 36 | | |
|-------+-------------+------------+------------+------------|
| 128MB | (2) 4M x 36 | (2) 4M x | (2) 4M x | (2) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 160MB | (2) 8M x 36 | (2) 4M x | (2) 4M x | (2) 4M x |
| | | 36 | 36 | 36 |
|-------+-------------+------------+------------+------------|
| 192MB | (2) 8M x 36 | (2) 8M x | (2) 8M x | None |
| | | 36 | 36 | |
|-------+-------------+------------+------------+------------|
| 256MB | (2) 8M x 36 | (2) 8M x | (2) 8M x | (2) 8M x |
| | | 36 | 36 | 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 256KB | (4) 32K x 8 | (4) 32K x 8 |
|------------------+--------------------+--------------------|
| 512KB | (4) 64K x 8 | (4) 64K x 8 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | W5 |
|----------------------------+-------------------------------|
| 256KB | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 512KB | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED SELECTION |
|------------------------------------------------------------|
| Speed | W6 |
|----------------------------+-------------------------------|
| 90MHz | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 100MHz | Pins 2 & 3 closed |
+------------------------------------------------------------+