4825 SX  (250-5141/42)              Settings            Faxback Doc. # 1683

The following tables list the switch settings for your computer. The 
factory (default) settings are marked with an asterisk (*).

CAUTION: Incorrect configuration settings can cause a computer malfunction
         or a decrease in performance.

Configuration Switch (SW1): Video Configuration

   ┌───────────────────────────────────────────────┐
   │Switches 1 and 2 (Maximum Resolution 800 x 600)│
   ├────────┬─────────┬────────────────────────────┤
   │SWITCH 1│ SWITCH 2│ MAXIMUM MONITOR FREQUENCY  │
   ├────────┼─────────┼────────────────────────────┤
   │OFF*    │ OFF*    │ 56 Hz                      │
   │OFF     │ ON      │ 60 Hz                      │
   │ON      │ OFF     │ 72 Hz                      │
   │ON      │ ON      │ 56 Hz (same as OFF, OFF)   │
   └────────┴─────────┴────────────────────────────┘
   ┌─────────────────────────────────────────────────┐
   │Switches 3 and 4 (Maximum Resolution 1024 x 768) │
   ├────────┬─────────┬──────────────────────────────┤
   │SWITCH 3│ SWITCH 4│ MAXIMUM MONITOR FREQUENCY    │
   ├────────┼─────────┼──────────────────────────────┤
   │OFF*    │ OFF*    │ Interlaced                   │
   │OFF     │ ON      │ 60 Hz Non-Interlaced         │
   │ON      │ OFF     │ 70 Hz Non-Interlaced         │
   │ON      │ ON      │ Interlaced (same as OFF, OFF)│
   └────────┴─────────┴──────────────────────────────┘
   ┌────────────────────────────────────────────────┐
   │Switch 5 (Frequency for Standard Modes, 0 to 13)│
   ├────────┬───────────┬───────────────────────────┤
   │SWITCH 5│ FREQUENCY │ VIDEO MODES               │
   ├────────┼───────────┼───────────────────────────┤
   │OFF*    │ 31 KHz    │ Standard (0-13)           │
   │ON      │ 40 KHz    │ Standard (0-13)           │
   └────────┴───────────┴───────────────────────────┘
   ┌─────────────────────────────────────────────────┐
   │Switch 6 (Total Amount of Video Memory Installed)│
   ├────────┬────────────────────────────────────────┤
   │SWITCH 6│ VIDEO MEMORY                           │
   ├────────┼────────────────────────────────────────┤
   │ON*     │ 512 KB                                 │
   │OFF     │ 1024 KB                                │
   └────────┴────────────────────────────────────────┘

Switches 7 and 8 (Enable/Disable On-Board Video to Install Alternate Video)

   ┌───────────┬────────────┬───────────────────────────────┐
   │SWITCH 7   │  SWITCH 8  │ ALTERNATE VIDEO INSTALLED     │
   ├───────────┼────────────┼───────────────────────────────┤ 
   │ON*        │  OFF*      │ Enable On-Board Video System  │
   │OFF        │  ON        │ Disable On-Board Video System │
   └───────────┴────────────┴───────────────────────────────┘

* Default switch setting.

Switch Block 2 (SW2): Monochrome Monitor Select

   ┌───────────────────────────────────────────┐
   │Switch 3 (Monochrome Monitor Select)       │
   ├───────────┬───────────────────────────────┤
   │SWITCH 3   │  MONITOR TYPE INSTALLED       │
   │           │                               │
   │OFF*       │  Color Monitor Installed      │
   │ON         │  Monochrome Monitor Installed │
   └───────────┴───────────────────────────────┘

Processor Type

SW2-1 OFF  SW2-2 OFF 486SX*                 * Factory Configuration

SW2-1 ON   SW2-2 OFF 486DX/DX2 50/DX4 75/ODPR "Retrofit"

SW2-1 ON   SW2-2 ON  487SX/DX2 50/DX4 75/ODP  "Overdrive"

NOTE: The CMOS Jumper Pins E2 and E3 are located in front of the printer
      port.

(jlc/jjs-11/04/94)