Connecting A Floppy Disk Drive; Connecting A Hard Disk Drive; Connecting A Cd-Rom (Ide Type); Using The Compact Flash Socket - Arcom SBC-GX1 Technical Manual

J643 SBC-GX1 2192-10757-000-000
the socket will automatically latch over the module and secure it in place. Removal of the
memory is achieved by gently pulling the two tabs side ways. The module will release and can
be removed easily.
Once power is applied to the board the BIOS will automatically configure the memory, and
during the memory check a message will be printed on the display to show the amount of
DRAM found.

Connecting a Floppy disk drive

The SBC-GX1 supports up to two standard floppy disk drives. These can be connected to PL17
via a 34 way twisted ribbon cable. Both disk drives should be configured to use drive select 1,
Drive A: should be connected via a twisted cable and DRIVE B: via a straight cable. The BIOS
default configuration assumes that a 1.44MB floppy disk is connected as drive A:. If you require
a different configuration you must configure the BIOS using the set-up screen.
Note:- In order to support two floppy disk drives at the same time the 34 way cable should be
fitted with three connectors. The board connector and one of the drive connectors should be
fitted 1:1 and the third connector should have a twist in the cable which swaps pins 10 to 16 on
this connector.

Connecting a Hard disk drive

Up to two IDE hard disk drives can be supported by the SBC-GX1 board. Both drives should be
connected to PL2 via a 40 way 1:1 ribbon cable. The primary drive should be set-up as a
'MASTER' and the secondary drive as a 'SLAVE'. The BIOS will automatically detect the hard
disk drive during the POST processes and configure the hardware correctly. The BIOS will
attempt to load an operating system from the primary disk drive. This drive will become DRIVE
C: once the operating system has loaded. If the board is fitted with flash memory and this has
been formatted as a silicon disk drive then it will be allocated as DRIVE D:. The secondary drive
will be allocated the next available drive letter.

Connecting a CD-ROM (IDE Type)

If a CD-ROM drive is required in the system, it may be connected in place of the secondary
drive detailed above. The CD-ROM should be configured as a 'SLAVE' device. Drivers will be
required to support the drive under DOS. If a bootable CD is inserted in the drive the BIOS can
be configured to automatically boot from this CD (Please refer to the BIOS Set-up section for
details).

Using the Compact Flash Socket

The SBC-GX1 has a Type II compact flash socket mounted on the underside of the board. This
socket is connected to the secondary IDE controller. The socket supports both Type I and Type
II compact flash cards. If a compact flash card is plugged into the socket it will act as a normal
hard disk drive and will be detected by the BIOS during the POST process. If the card has an
operating system loaded and there are no standard hard disk drives connected. The board will
boot form the compact flash card and this will become drive C: drive.
The compact flash card can only be inserted into the socket one way up. The correct orientation
is for the top of the card i.e. the normal printed side to be closest to the PCB.
Page 9
C O N T R OL S Y S T E M S