IBM CORPORATION
PS/2 MODEL 80 (8580-A21, A31)
| 
 Processor  | 
 80386DX  | 
| 
 Processor Speed  | 
 16/20/25MHz  | 
| 
 Chip Set  | 
 None  | 
| 
 Max. Onboard DRAM  | 
 8MB  | 
| 
 Cache  | 
 None  | 
| 
 BIOS  | 
 IBM  | 
| 
 Dimensions  | 
 355mm x 254mm  | 
| 
 I/O Options  | 
 Serial port, parallel port, pointing device connector, display connector, video adapter slot, floppy drive connector  | 
| 
 NPU Options  | 
 80387  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Power supply  | 
 J1  | 
 Serial port  | 
 J6  | 
| 
 Floppy drive  | 
 J2  | 
 Parallel port  | 
 J7  | 
| 
 Battery/speaker  | 
 J3  | 
 Pointing device  | 
 J8  | 
| 
 Video adapter slot  | 
 J4  | 
 Keyboard  | 
 J9  | 
| 
 VGA port  | 
 J5  | ||
| 
 DRAM CONFIGURATION  | ||
| 
 Size  | 
 Bank 0  | 
 Bank 1  | 
| 
 1MB  | 
 (1) 256K x 36  | 
 NONE  | 
| 
 2MB  | 
 (1) 256K x 36  | 
 (1) 256K x 36  | 
| 
 4MB  | 
 (1) 1M x 36  | 
 NONE  | 
| 
 8MB  | 
 (1) 1M x 36  | 
 (1) 1M x 36  | 
| 
 Note:SIMMs are a proprietary IBM design, standard 36-bit SIMMs can not be used.  | ||