Chapter 7: CompactFlash, SDRAM, and battery backup
Description
The XE–800 SBC is shipped with a 512 KB Surface Mount (SMT) flash. It is
soldered directly onto the PCB board. This flash contains the BIOS.
The memory socket can accept up to 256 MB capacity SO-DIMM modules.
A battery backup connector is provided at J10 for an AT battery to back up the real
time clock.
CompactFlash
The CompactFlash socket supports 3.3 V devices. The CompactFlash appears to the
system as an IDE device. It is automatically detected and configured as a hard
drive during bootup. To configure the XE–800 SBC to boot from a CompactFlash,
refer to the following section “Creating a Bootable CompactFlash.”
The CompactFlash socket is connected to the Primary IDE channel. This channel is
configured for a Master device only. Therefore, if a CompactFlash device is
installed, it will show up as a Master on the Primary IDE channel. Any additional
IDE devices will show up as Secondary IDE devices.
Note
Octagon Systems only recommends Industrial Grade CompactFlash (NAND
technology) that implements ECC error code correction, and wear level technology.
Creating a bootable CompactFlash
A CompactFlash as shipped from the factory may or may not be formatted; even if
formatted, it may or may not be bootable. The following sequence shows how to
create a bootable CompactFlash, and how to configure the XE–800 SBC to boot
from the CompactFlash.
CAUTION
You must use an external drive such as a hard drive or CD to sys the
CompactFlash. See step 5.
1. Create a bootable external device.
Note
Octagon offers OS Embedders that include a CD boot disk for a variety of operating
systems. Contact your Octagon representative for additional information.
2. Change the boot sequence in BIOS Setup so the XE–800 SBC boots from the
external drive first. Reboot from the external device.
3. Use FDISK to create partitions on the CompactFlash. Refer to your operating
system manual for the appropriate parameters for using FDISK. You might
also have to refresh the MBR (Master Boot Record).
4. Reboot, using the external device.
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Содержание XE-800
Страница 18: ...Figure 2 1 XE 800 SBC component diagram top 18 ...
Страница 19: ...Figure 2 2 XE 800 SBC component diagram bottom 19 ...
Страница 20: ...Figure 2 3 XE 800 SBC dimensions 20 ...
Страница 89: ...MOV AX 0fb0bh MOV DX 0ffffh INT 17h MOV aData AL if aData 1 printf U1 jumper is ON n 89 ...