2500 XL (250-4074)               SETTINGS               Faxback Doc. # 1143

Jumpers are shown for reference. They should not have to be changed for 
normal operation. Default (factory) jumper settings are listed in 
"Configuration Settings."

A jumper is a clip that contains metal contacts. To install a jumper, place 
it over two adjacent pins to connect or bypass a circuit. A jumper can be 
installed, removed, or parked.

In most cases, it will not be necessary to change any jumper settings. 
Default (factory) jumper settings are shown in "Configuration Settings." 
Refer to your option documentation to determine whether any jumpers must be
changed. If so, refer to "Configuration Settings: to determine the 
appropriate jumper setting to match the configuration required by your 
hardware option.

CONFIGURATION SETTINGS

This chart lists the valid jumper settings for the 2500XL. Factory default 
settings are marked with an asterisk (*).
┌────────────────────────────────────────────────────────────────┐
│   JUMPER SETTINGS                                              │
├───────────────┬───────────────────┬────────────────────────────┤
│   FUNCTION    │ DESCRIPTION       │ JUMPER SETTING             │
├───────────────┼───────────────────┼────────────────────────────┤
│   Video       │ Standard*         │ E12 and E13--No connection │
│   Interrupt   │ IRQ9              │ E12 and E13--installed     │
├───────────────┼───────────────────┼────────────────────────────┤
│   On-Board    │ Enabled*          │ E15 and E16--installed     │
│   Video       │ Disabled          │ E14 and E15--installed     │
├───────────────┼───────────────────┼────────────────────────────┤
│   BIOS ROM    │ 4MB or 8MB        │ E10 and E11--installed     │
│   Location    │ ROM*              │                            │
│               │                   │                            │
│               │ Two 32KBx8        │ E9 and E10--installed      │
│               │ EEPROMS           │                            │
│               │ U17 and U18)      │                            │
├───────────────┼───────────────────┼────────────────────────────┤
│     Clear     │                   │ E1 and E3--installed       │
│    CMOS RAM   │                   │                            │
├───────────────┼───────────────────┼────────────────────────────┤
│   Expansion   │ Same as Fast      │ E2 and E4--installed       │
│   Bus Speed   │ System Clock      │                            │
│               │ Speed*            │                            │
├───────────────┼───────────────────┼────────────────────────────┤
│               │ 1/2 Fast System   │ E4 and E8--installed       │
│               │ Clock Speed       │                            │
├───────────────┼───────────────────┼────────────────────────────┤
│   Input Source│ Microphone*       │ E18 and E19--installed     │
│               │ Line Audio        │ E17 and E18--installed     │
├───────────────┼───────────────────┼────────────────────────────┤
│   Memory      │ Enabled*          │ E5 and E6--installed       │
│   Parity Check│ Disabled          │ E6 and E7--installed       │
├───────────────┴───────────────────┴────────────────────────────┤
│   * Indicates default (factory) setting.                       │
└────────────────────────────────────────────────────────────────┘

(/tmc-04/23/95)