4100 MT (250-5160) Setting Faxback Doc. # 2776 The following are the jumper and switch settings available for the 4100MT: Switch Settings Off On Switch 1 - Built in VGA * Enabled Disabled Switch 2 - Reserved * Off Switch 3 - Reserved * Off Switch 4 - Password * Enabled Disabled Switch 5 - Primary Display Mono * Color Adapter Switch 6 - Reserved * Off Switch 7 - Reserved * Off Switch 8 - Disable System * Enabled Disabled Setup * = default Jumpers Cache Jumper Settings 64-KB Cache 256-KB E7 Off (Open) On (Closed) E8 Off (Open) > On (Closed) Microprocessor Types Jumper 486SX 487SX 486DX/ OverDrive OverDrive 486DX-2 for 486SX for DX2 E9 Off (Open) 1-2 2-3 1-2 1-2 E10 2-3 1-2 1-2 1-2 1-2 E11 1-2 2-3 1-2 2-3 2-3 E12 Off (Open) On (Closed) On(Closed) On(Closed) On(Closed) E13 2-3 2-3 2-3 2-3 1-2 Parallel Port Jumper Default Optional Setting Function E15 1-2 (IRQ 7) 2-3 (IRQ 5)> LPT1 Video Memory Clock Frequency Jumper 55Mhz 45Mhz(Default) 60Mhz 50Mhz E800 1-2 1-2 2-3 2-3 E801 1-2 2-3 1-2 2-3 Monitor Interface Control Jumper E802 Function 1-2 Monitor interface control enabled. This is to enable powerdown mode on AST 15" Compal monitors. Pin 9 of the VGA connector is used to signal a power down command to the monitor. Most monitors do not follow this power down mode. Most newer monitors support VESA powerdown specifications. 2-3 Monitor interface control disabled. This (default) should be the default condition unless it is an AST 15" Compal monitor. Video Memory Type R8 E803 E804 Video Memory Type Installed 1-2 1-2 Asymetric DRAM (Default Setting) Installed 2-3 2-3 Symmetric DRAM Removed 2-3 2-3 Graphic DRAM Your computer comes ready for you to use a color VGA or SVGA monitor, set passwords, and use the System Setup program. If you prefer to disable the built-in video connector, disable the password feature, specify the type of add-in display adapter, or deny access to the System Setup program, you need to set switches on the system board. Warnings: Altering switch setting while the computer is on can permanently damage the computer and its components. To avoid accidental discharge of static electricity as you handle components or switches, you can use a grounding wrist strap. Static electricity can damage computer components. To avoid the possibility of being shocked, do not use an object make of conductive material, such as the graphite in a pencil, to slide the switch. To set one or more system switches, do the following: 1. Turn the computer off, unplug the power and phone cords, and disconnect all peripheral devices. Remove the system-unit cover, and move the internal drive bay. 2. Locate the switch bank (figure 10). by default, all the switches are off, except switch 5. Leave them as they are unless you want to do the following: * If you have plugged your monitor into the built-in VGA connector, you should of course leave the built-in VGA enabled. Because your computer includes a video autosense feature that detects the presence of many add-in video adapters, you should usually leave the built-in VGA enabled even if you are installing an add- in video adapter. Disable built-in VGA only if you install a CGA or monochrome video board, or if the system does not recognize a video adapter you are installing. If you need to disable built-in VGA, set switch 1 on. * If you have disabled the built-in video connector and intend to install a monochrome, rather than color, display adapter as the primary display adapter, set system board switch 5 off. * To prevent the computer from using passwords, set switch 4 on. (The system does not have a password until you establish one in the System Setup program.) * If you intend to disable the System Setup program, set switch 8 to on. Table 1. Switch Definitions Number Definition Switch 1 - Built-in VGA. Off - enabled, on - disabled Switch 2 - Reserved (leave off) Switch 3 - Reserved (leave off) Switch 4 - Password. Off - enabled, on - disabled Switch 5 - Primary display adapter. Off - mono, on-color Switch 6 - Reserved (leave off) Switch 7 - Reserved (leave off) Switch 8 - Disable System Setup. Off - enabled, on - disabled (ALL/all-06/16/94)