MAG-200 Operator Guide Rev 1.05.
Definitions
Bootloader
– Bootloader allows loading and starting the basic program.
Basic program
– the complex of software and hardware, which allows rendering
services to the user.
Bootstrap
– Specially prepared image for the basic program upgrade. It consists of the
Linux core and RAM root file system signed with a digital signature.
Core
– Linux core.
Cyclic multicast group
– multicast group with cyclic broadcast of data.
Bootloader of the device
The bootloader is used for loading and starting the basic program. The
bootloader allows loading the basic program from the network and from nand-flash with
further check of the loaded image integrity. The basic program can be loaded from the
network using tftp protocol or from the multicast group. The loading stages are
reflected on TV screen and on the front panel indicator. The bootloader menu can be
used to change the loading mode, to set logo and operator key.
After the device is switched on the bootloader sets the following modes of video
outputs:
•
HDMI, Component ( YPrPb), SCART – 576p;
•
CVBS, S-Video – 576i
Some menu items set the variables of the bootloader. Sometimes there may
arise the necessity to know the values of these variables. This can be achieved with
the help of the utility
fw_printenv
. For example, the command “
fw_printenv tvsystem
”
shows the current value of the variable tvsystem.
Bootloader menu
To enter the bootloader menu press and keep the key “menu” on the remote
control or the key “On/Off” on the front panel and switch on the device.
Navigation in the bootloader menu is ensured with remote control and front
panel keys. The keys Up/Down allow moving between the menu items. The key “to the
right” allows entering a menu item or changes the item value. The key “to the left”
provides exit to the previous menu or confirms the performance of the operation (“OK”).
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