Appendix A
Specifications
CPU and Memory
| Intel 80486SX/25 microprocessor; |
| upgradable to 486SX/33, 486DX/33, |
| 486DX2/50, or 486DX2/66 |
System speed | Fast and slow speeds available; fast speed |
| is 25 MHz or the speed of your upgraded |
| microprocessor, slow speed is 8 MHz; |
| speed selection through SETUP program |
| and keyboard commands |
Memory | 4MB RAM standard on a SIMM; |
| expandable to 32MB using 1MB, 4MB, |
| 8MB, and 16MB SIMMs; SIMMs must be |
| |
| type with 70ns or faster access speed |
ROM | 512KB system BIOS, video BIOS, and |
| SETUP code located in EPROM on main |
| system board |
Video RAM | 512KB DRAM on main system board; |
| expandable to 1MB using 70ns or 80ns |
| 44256 DIP chips |
Shadow RAM | Supports shadowing of system and video |
| BIOS ROM into RAM |
Cache | 8KB of internal cache (built into the |
| microprocessor); supports 32KB or 128KB |
| of external cache using |
| or 25ns DIP chips or |
| DIP chips |
Specifications