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 |