Mine

#include <psptypes.h>

#ifndef PSPSPIDS_H
#define PSPSPIDS_H

#ifdef __cplusplus
extern "C" {
#endif
void ReadKey(u16 key, void *buffer);
/*  args: key - IdStorage Key
 *        buffer - Buffer[512] to read into
 */
 
void WriteKey(u16 key, void *buffer);
/*  args: key - IdStorage Key
 *        buffer - Buffer[512] to write into
 */
 
int CheckDummy(int key);
/*  args: key - IdStorage Key
 *        returns 0 if key is dummied (00)
 */
 
int CheckHW(void);
/*        returns 0 for TA081/TA079
 *        returns -1 for TA082
 *        returns -2 for unknown hw
 */
 
int dmpKey(u16 key, char filepath[50]);
/*  args: key - IdStorage Key
 *        filepath - filepath to dump key into (maximum 50 characters)
 */

int BrickPSP(void);
/*        Bricks PSP
 *        Warning this bricks through UP chip
 *        Returns -1 if IdStorage Read Only
 *        Returns 0 for success
 */

int chkDowngrade(void);
/*        Checks if run TA082 downgrade
 */

int chkByte(u16 key, u32 offset, char val);
/*  args: key - IdStorage Key
 *        offset - Byte # to read
 *        val - value that offset should be
 *        returns 0 is byte is correct
 *        returns -1 if byte is incorrect
 */

#ifdef __cplusplus
}
#endif

#endif /* PSPIDSTOR_H */