LS Pro (Caracal) Motherboard Layout (Rev 1.5.1)

RAM Configurations

Memory Expansion Note

For the correct operation of this device in Caracal and to gain the best system performance, this device is to be ONLY used in Caracal systems with a Cache Module installed. Its use in cacheless machines is NOT recommended.

Ethernet Options

Disk Drives

Switch Settings

PL6 CMOS Jumper

PL7 Speaker

PL10 BIOS Protection

PL12 IR Receive

PL14 Fan

PL18 Ethernet Selection

PL19 / 20 Speed Selection Jumper

PL21 Processor Voltage

 Do not alter from default position

PL23 Processor Voltage

 Do not alter from default position

PL24 Processor Voltage

 Do not alter from default position

PL25 Processor Jumper

Additional Options

Rear Panel

CMOS Discharge

To enter CMOS SETUP press ALT-S key combination when invited to do so at boot up. 

Basic Configuration Options

Hard Disk

The disk 1 information box shows the type and capacity of the computer's fixed hard disk drive, where known. Beneath this are three option buttons:

To define a Third-party hard disk drive:

User Defined Hard Disks

In the User-defined Hard Disks dialog box, choose the Detect button to see if BIOS Setup can detect what type of drive is fitted. If it can, then the characteristics of the drive appear in the dialog.

If BIOS Setup cannot detect the drive type, you must manually enter the drive's number of cylinders, heads and sectors, and its capacity, in the text boxes provided.

Choose the Save button.

Floppy Disk

The information box shows the type and capacity of the computer's diskette drive. Beneath it are two option buttons:

Memory

These information boxes show the total amount of system memory (motherboard memory plus any additional memory modules, minus the 384 Kbytes upper memory area) and the amount of extended memory (total memory minus the 640 Kbytes of conventional memory).

Power-on Sound

When this option is enabled a tone will sound whenever the computer is turned on.

To set the power-on sound:

1. In the Power-on Sound group, select the Enable check box.
2. Choose the Test button to audition the Power-on sound.
3. Use the scroll bar to adjust the volume of the Power-on sound as required.

Power-on Password

If this option is enabled a password must be entered every time the computer is turned on.

To set a power-on password:

1. In the Power-on Password group, select Enable check box.
2. Select the text box, and type a password of up to seven characters using A-Z and 0-9. The password is not case-sensitive and cannot include space characters. To preserve security, the password is not displayed as you type but is shown as a string of asterisks.

The power-on password operates in addition to the security system features, if enabled.

Monitor Type

These three options alter the timings of the video signals provided by the computer to suit a variety of different types of monitor.

It is important that you make the correct selection for your monitor. See the Apricot Help on the on-board EVGA controller for up-to-date advise on the choices to make for Apricot monitors.

Startup

The Startup options control how the display looks during POST, when BIOS sign-on and hardware configuration messages are displayed.

Boot Device

These options allow you to select where you want the computer to look for an operating system when it boots.

Remote or network booting using Ethernet RPL won't work unless there's an RPL server somewhere in your network. Don't attempt to boot your computer in this way without first checking with the network administrator.

Advanced Configuration Options

Parallel Port

These three options allow you to set the mode of the parallel port.

Disable Floppy Disk

Disables the diskette drive controller.

Disable Floppy Write

Disables the computer's ability to write to the diskette drive.

Disable Floppy Boot

Disables the computer's ability to boot from a system diskette in the diskette drive.

Disable Parallel Port

Disables the parallel port, freeing interrupt IRQ7 and I/O ports 3BCh-3BFh. However, IRQ7 can usually be "double-booked" without affecting the operation of the parallel port.

Disable Serial Port 1

Disables serial port 1, freeing interrupt IRQ4 and I/O ports 3F8h-3FFh.

Disable Serial Port 2

Disables serial port 2, freeing interrupt IRQ3 and I/O ports 2F8h-2FFh.

Disable Hard Disk Controller

Disables the hard disk controller, freeing I/O ports 1F0h-1F8h and 3F6h-3F7h.

Ethernet

Disables the on-board network adapter, freeing interrupt IRQ5 and I/O ports 300h-317h. (However, interrupt IRQ5, even if free, cannot be used by the PCMCIA interface.)

Disable BIOS Copy at 16MB

Disables the "copy" of the computer's BIOS ROM which normally appears in the computer's address space just below 16Mbytes (between FE0000h and FFFFFFh). This is not a real copy, just the same ROM addressed through a different (higher) set of memory addresses. This copy must be disabled if your computer actually has 16Mbytes (or more) system memory, or the two will conflict.

Disable i486 Cache

Disables the memory cache inside the system processor.

Disable External Cache

Disables the external, or second-level memory cache, outside the system processor.

Disable BIOS Shadowing

Disables the scheme whereby the contents of the computer's BIOS ROM are copied into system memory, where they can be accessed more quickly.

Disable Large HD Translation

Disables the scheme (known as Extended CHS) whereby the BIOS is able to access hard disk drives of greater than 504 Mbytes capacity. You might need to do this if your operating system does not support Extended CHS, in which case the drive will appear to have less than its full capacity.

Energy Conservation

Currently Unavailable

CPU Power Management

Currently Unavailable