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The BIOS
The BIOS (Basic Input/Output System) is software that interfaces hardware-specific features of the
cpuModule to an operating system (OS). Physically, the BIOS software is stored in a Flash EPROM
on the cpuModule. Functions of the BIOS are divided into two parts:
The first part of the BIOS is known as POST (Power-On Self-Test) software, and it is active from
the time power is applied until an OS boots (begins execution). POST software performs a series of
hardware tests, sets up the machine as defined in Setup, and begins the boot of the OS;
The second part of the BIOS is known as the CORE BIOS. It is the normal interface between cpu-
Module hardware and the operating system which is in control. It is active from the time the OS
boots until the cpuModule is turned off. The CORE BIOS provides the system with a series of soft-
ware interrupts to control various hardware devices.
The following sections discuss the sections of the BIOS in more detail and describe features of the
BIOS which may be useful to you in developing applications.
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Страница 48: ...48 Configuring Hardware...
Страница 74: ...74 An example BASIC program illustrating EEPROM access is in the file CMV_EE BAS on the cpu Module utility disk...
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Страница 118: ...118 RTD Embedded Technologies Inc 103 Innovation Blvd State College PA 16803 0906 USA Our website www rtd com...