486 BIOS Settings
Jump to navigation
Jump to search
Known working and tested BIOS settings for the 486
BIOS Features Setup
| Setting | Value | Comments |
|---|---|---|
| Virus Warning | Disabled | |
| CPU Internal Cache | Enabled | |
| External Cache | Enabled | |
| Boot Up System Speed | High | |
| IDE HDD Block Mode | Enabled | |
| Video BIOS Shadow | Enabled | |
| C8000-CFFFF Shadow | Disabled | |
| D0000-D7FFF Shadow | Disabled | |
| D8000-DFFFF Shadow | Disabled |
Chipset Features Setup
| Setting | Value | Default | Comments |
|---|---|---|---|
| Auto Configuration | Disabled | Enabled | |
| AT Bus Clock | 1/4 CLKIN | 7.159 MHz | |
| DRAM Speed | Fastest | Slowest | |
| DRAM Write WS | 1 WS | 1 WS | |
| DMAN Write CAS | 1T | 2T | |
| DRAM Write Burst | Disabled | Disabled | |
| Slow Refresh | Enabled | Disabled | |
| Hidden Refresh | Enabled | ||
| L2 Cache Scheme | Write Back | ||
| L1 Cache Scheme | Auto | ||
| Cache Burst Read | 1T | ||
| Cache Write Cycle | 2T | 3T | |
| Video Shadow | Non-Cacheable | ||
| Memory Hole | Disabled | ||
| Fast Reset Emulation | Enabled | ||
| Fast Reset Latency | 2 us | ||
| Latch Local Bus | T3 | ||
| Local Bus Ready | Syncronize |