IBM CORPORATION
PS/2 MODEL 25 TYPE 1
| 
 Processor  | 
 8086  | 
| 
 Processor Speed  | 
 8MHz  | 
| 
 Chip Set  | 
 None  | 
| 
 Max. Onboard DRAM  | 
 640KB  | 
| 
 Cache  | 
 None  | 
| 
 BIOS  | 
 IBM  | 
| 
 Dimensions  | 
 355mm x 304mm  | 
| 
 I/O Options  | 
 Serial port, parallel port, pointing device connector, video port, IDE interface, floppy drive interface, earphone connector  | 
| 
 NPU Options  | 
 8087  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Pointing device  | 
 J1  | 
 Fan  | 
 J8  | 
| 
 Keyboard  | 
 J2  | 
 Keylock  | 
 J10  | 
| 
 Parallel port  | 
 J3  | 
 IDE interface  | 
 J11  | 
| 
 Video port  | 
 J4  | 
 Floppy drive interface  | 
 J12  | 
| 
 Serial port  | 
 J5  | 
 Earphone connector  | 
 J13  | 
| 
 Riser card  | 
 J6  | ||
| 
 DRAM CONFIGURATION  | |||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
 Parity (P-1)  | 
| 
 512KB  | 
 (2) 256K x 9  | 
 NONE  | 
 NONE  | 
| 
 640KB  | 
 (2) 256K x 9  | 
 (4) 4464  | 
 (2) 4164  |