IBM CORPORATION
PC SERVER 520 (TYPE 8641) MODEL MZO, MZV, MZS, MZL, MZE
| 
 Processor  | 
 Pentium  | 
| 
 Processor Speed  | 
 Unidentified  | 
| 
 Chip Set  | 
 Unidentified  | 
| 
 Video Chip Set  | 
 Unidentified  | 
| 
 Maximum Onboard Memory  | 
 256MB  | 
| 
 Maximum Video Memory  | 
 Unidentified  | 
| 
 Cache  | 
 512KB  | 
| 
 BIOS  | 
 Unidentified  | 
| 
 Dimensions  | 
 355mm x 304mm  | 
| 
 I/O Options  | 
 32-bit PCI slots (2), floppy drive interface, IDE interfaces (2), SCSI interface, Wide SCSI interfaces (2), parallel port, PS/2 mouse port, serial ports (2), VGA port, cache slot  | 
| 
 NPU Options  | 
 None  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 SCSI interface LED  | 
 J2  | 
 Serial port 2  | 
 J21  | 
| 
 IDE interface  | 
 J3  | 
 Serial port 1  | 
 J24  | 
| 
 Chassis fan power  | 
 J4  | 
 Reset switch  | 
 J25  | 
| 
 Speaker  | 
 J6  | 
 SCSI interface  | 
 J28  | 
| 
 CPU fan power  | 
 J8  | 
 Wide SCSI interface (internal)  | 
 J35  | 
| 
 CPU fan power  | 
 J9  | 
 Wide SCSI interface (external)  | 
 J39  | 
| 
 Power LED  | 
 J10  | 
 VGA port  | 
 J40  | 
| 
 IDE interface  | 
 J13  | 
 PS/2 mouse port  | 
 J42  | 
| 
 Parallel port  | 
 J19  | 
 32-bit PCI slots  | 
 PC1 -& PC2  | 
| 
 Floppy drive interface  | 
 J20  | 
 Cache slot  | 
 SL1  | 
| 
 USER CONFIGURABLE SETTINGS  | |||
| 
 Function  | 
 Label  | 
 Position  | |
| 
 »  | 
 Factory configured - do not alter  | 
 J3A  | 
 Unidentified  | 
| 
 »  | 
 Factory configured - do not alter  | 
 J12  | 
 Open  | 
| 
 »  | 
 Factory configured - do not alter  | 
 J14  | 
 Unidentified  | 
| 
 »  | 
 Password write enabled  | 
 J15  | 
 Pins 2 & 3 closed  | 
| 
 Password write disabled  | 
 J15  | 
 Pins 1 & 2 closed  | |
| 
 »  | 
 Factory configured - do not alter (C2 cover)  | 
 J16  | 
 Unidentified  | 
| 
 »  | 
 Factory configured - do not alter (C2 keylock)  | 
 J17  | 
 Unidentified  | 
| 
 »  | 
 On board video enabled  | 
 J26  | 
 Pins 1 & 2 closed  | 
| 
 On board video disabled  | 
 J26  | 
 Pins 2 & 3 closed  | |
| 
 »  | 
 On board SCSI enabled  | 
 J27  | 
 Pins 1 & 2 closed  | 
| 
 On board SCSI disabled  | 
 J27  | 
 Pins 2 & 3 closed  | |
| 
 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 36  | 
 None  | 
 None  | 
| 
 24MB  | 
 (2) 2M x 36  | 
 (2) 1M x 36  | 
 None  | 
 None  | 
| 
 24MB  | 
 (2) 1M x 36  | 
 (2) 1M x 36  | 
 (2) 1M x 36  | 
 None  | 
| 
 32MB  | 
 (2) 4M x 36  | 
 None  | 
 None  | 
 None  | 
| 
 32MB  | 
 (2) 2M x 36  | 
 (2) 2M x 36  | 
 None  | 
 None  | 
| 
 32MB  | 
 (2) 1M x 36  | 
 (2) 1M x 36  | 
 (2) 1M x 36  | 
 (2) 1M x 36  | 
| 
 40MB  | 
 (2) 4M x 36  | 
 (2) 1M x 36  | 
 None  | 
 None  | 
| 
 48MB  | 
 (2) 4M x 36  | 
 (2) 2M x 36  | 
 None  | 
 None  | 
| 
 48MB  | 
 (2) 2M x 36  | 
 (2) 2M x 36  | 
 (2) 2M x 36  | 
 None  | 
| 
 64MB  | 
 (2) 4M x 36  | 
 (2) 2M x 36  | 
 (2) 2M x 36  | 
 None  | 
| 
 64MB  | 
 (2) 8M x 36  | 
 None  | 
 None  | 
 None  | 
| 
 SIMM CONFIGURATION (CON’T)  | ||||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 Bank 2  | 
 Bank 3  | 
| 
 64MB  | 
 (2) 4M x 36  | 
 (2) 4M x 36  | 
 None  | 
 None  | 
| 
 64MB  | 
 (2) 2M x 36  | 
 (2) 2M x 36  | 
 (2) 2M x 36  | 
 (2) 2M x 36  | 
| 
 72MB  | 
 (2) 8M x 36  | 
 (2) 1M x 36  | 
 None  | 
 None  | 
| 
 80MB  | 
 (2) 8M x 36  | 
 (2) 1M x 36  | 
 (2) 1M x 36  | 
 None  | 
| 
 80MB  | 
 (2) 4M x 36  | 
 (2) 2M x 36  | 
 (2) 2M x 36  | 
 (2) 2M x 36  | 
| 
 80MB  | 
 (2) 8M x 36  | 
 (2) 2M x 36  | 
 None  | 
 None  | 
| 
 88MB  | 
 (2) 8M x 36  | 
 (2) 1M x 36  | 
 (2) 1M x 36  | 
 (2) 1M x 36  | 
| 
 96MB  | 
 (2) 8M x 36  | 
 (2) 2M x 36  | 
 (2) 2M x 36  | 
 None  | 
| 
 96MB  | 
 (2) 8M x 36  | 
 (2) 4M x 36  | 
 None  | 
 None  | 
| 
 96MB  | 
 (2) 4M x 36  | 
 (2) 4M x 36  | 
 (2) 4M x 36  | 
 None  | 
| 
 112MB  | 
 (2) 8M x 36  | 
 (2) 2M x 36  | 
 (2) 2M x 36  | 
 (2) 2M x 36  | 
| 
 128MB  | 
 (2) 8M x 36  | 
 (2) 4M x 36  | 
 (2) 4M x 36  | 
 None  | 
| 
 128MB  | 
 (2) 8M x 36  | 
 (2) 8M x 36  | 
 None  | 
 None  | 
| 
 128MB  | 
 (2) 4M x 36  | 
 (2) 4M x 36  | 
 (2) 4M x 36  | 
 (2) 4M x 36  | 
| 
 160MB  | 
 (2) 8M x 36  | 
 (2) 4M x 36  | 
 (2) 4M x 36  | 
 (2) 4M x 36  | 
| 
 192MB  | 
 (2) 8M x 36  | 
 (2) 8M x 36  | 
 (2) 8M x 36  | 
 None  | 
| 
 256MB  | 
 (2) 8M x 36  | 
 (2) 8M x 36  | 
 (2) 8M x 36  | 
 (2) 8M x 36  | 
| 
 Note: The locations of the banks are unidentified.  | ||||
| 
 CACHE CONFIGURATION  | |
| 
 Size  | 
 Bank 0  | 
| 
 512KB  | 
 512KB module installed  | 
| 
 VIDEO MEMORY CONFIGURATION  | 
| 
 Note: The size & location of the video memory is unidentified.  | 
| 
 CPU CLOCK SPEED SELECTION  | |
| 
 Speed  | 
 J43  | 
| 
 50MHz  | 
 Pins 2 & 3 closed  | 
| 
 60MHz  | 
 Pins 1 & 2 closed  |