User's Manual

Programming—Chapter 7
277700 Series Color Mobile Computer User’s Manual
IOCTL_HAL_GET_BOOT_DEVICE
This IOCTL code allows software to check which device CE booted from.
Usage
#include “oemioctl.h”
Syntax
BOOL KernelIoControl( IOCTL_HAL_GET_BOOT_DEVICE,LPVOID
lpInBuf,DWORD nInBufSize,LPVOID lpOutBuf,DWORD
nOutBufSize,LPDWORD lpBytesReturned );
Parameters
lpInBuf Should be set to NULL.
lpInBufSize Should be set to zero.
lpOutBuf Must point to a buffer large enough to hold a DWORD
(4 bytes) that contains the boot device. The following
boot devices are supported:
#define HAL_BOOT_DEVICE_UNKNOWN 0
#define HAL_BOOT_DEVICE_ROM_XIP 1
#define HAL_BOOT_DEVICE_ROM 2
#define HAL_BOOT_DEVICE_PCMCIA_ATA 3
#define HAL_BOOT_DEVICE_PCMCIA_LINEAR 4
#define HAL_BOOT_DEVICE_IDE_ATA 5
#define HAL_BOOT_DEVICE_IDE_ATAPI 6
nOutBufSize The size of lpOutBuf in bytes (4).
lpBytesReturned The number of bytes returned by the function.
Return Values
Returns TRUE if function succeeds. Returns FALSE if the function fails.
GetLastError() may be used to get the extended error value.