使用BIOS 扩展 Int 13H 中断对硬盘进行读写（国外英文资料）.docVIP

使用BIOS 扩展 Int 13H 中断对硬盘进行读写（国外英文资料） Using the BIOS extension Int 13H interrupts the hard drive to read and write The 2009-08-20 20:09 To load the operating system and other code into memory, you have to read and write the hard drive. Now that the hard drive is large, use the extended INT 13H to read and write the hard drive. The following USES the NASM assembly language, the ALINK linker, to compile the links. Test in real mode DOS for virtual machines. Assembler: A.a sm Segment _TEXT. Code segment .. Start: Application entry point Mov ax, _DATA while forming Mov ds, ax Mov ax, stack Mov ss, ax Mov sp, stacktop Call CheckInt13H; Call this function to verify that the extension 13H function exists Call ExInt13H; This is a function of reading and writing ; System calls ended in DOS Programend: Mov ax, 0 x4c00 Int 0 x21 CheckInt13H:; This is a function of verifying that the extension 13H function exists. Mov ah, 0 x41; Function number is 41 h Mov bx, 55 aah; Entry parameter Mov dl, 81 h; The second parameter indicates the drive to test, 80H is the first hard disk, and 81H is the second block... Int h; CMP bx, 0 xaa55; If there is an extension of 13H, then bx = = AA55H JNZ NotSupport; ; The test results are not supported, and skip to the following information that is not supported. Push SupportEx13hMsg; The test results are supported and display supported information. ^_^ The call display The add sp, 2 ret NotSupport: Push NotSupportEx13hMsg The call display The add sp, 2 ret ExInt13H:; This function is a read (ah = 42H) or write (ah = 43H) ; Here is the address package Mov byte [PacketSize], 10h; The size of the address packet, the rule is 10h, and there may be other versions Mov byte [Reserved], 0; This is the reservation is equal to 0 Mov word [BlockCount] 1; Number of blocks to transfer (sector number). Test one sector here Mov word [BufferOff]. The offset of the buffer is 2B Mov word [BufferSeg]. Buffer zone: 2B Mov. The disk starts absolute block address (sector) 8