PSX Memory Layout
Added 08 Jul 1997 - GPU関連のいくつかのハードウェアレジスタ (0x1f80xxxx) 22 Jul 1997 - Fixed some typo's... 17 Oct 1997 - Changed a bit of 1f00xxx, and changed 1f80xxxx 04 Dec 1997 - Added memcard fields (1f801040) - Added a link to a GPU document Credits: Foo Chen Hon - IO Device Driver Descriptor Table, some bits on file descs, and mental kicks. Uxorious - For help on testing when i was psx-less, and some clues. Me - for the the rest
0x00000000-0x001fffff
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The kernel has allocated space for 16 fdescriptors, this means, you can not
have more than 16 files open, whatever devices they use...
カーネルは16個のファイルディスクプリタのスペースを割り当てます。これは、どのデバイスであれ、16以上のファイルをオープンできないことを意味します。
typedef struct _fdTbl_ {
long flag;
long dev_num;
void *buffer;
long numBlocks;
long position; /* the actual seek offset on the file */
long devflag;
long error;
iodd *dev; /* a pointer to a structure containing all
routines like read,write,close,etc... for a
specific device (cdrom,memcard,...) */
/* 特定デバイス(cdrom,メモリカード,..)の
read,write,close等のような全てのルーチンを
含む構造体へのポインタ */
long ???,???;
long handle;
} fdTbl;
typedef struct _iodd_ {
char *dev_name;
long devflag; /* Not sure */
long blockSize;
char *dev_desc; /* Pointer to description */
long init(); /* Init device Driver */
long open(int fd,char *fname) /* open device */
long ???;
long close(); /* close device */
long ioctl(); /* IO control on device */
long read(); /* read from the device */
long write(); /* write on the device */
long erase(); /* erase a file */
long undelete(); /* unerase a file */
long firstfile(); /* find first file matching pattern */
long nextfile(); /* find next file matching pattern */
long format(); /* format the device */
long cd(); /* change directory */
long rename; /* rename file */
long deinit; /* Deinit the device driver */
long ???;
} iodd;
0x1f000000-0x1f??????
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0x1f801000-0x1f80xxxx
0xbfc00000-0xbfc7ffff
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