CN100382027C - Method for storing and operating high-capacity Boot ROM mirror - Google Patents

Abstract

The aim of the present invention is to provide a large-capacity Boot ROM mirror image storing and operating method with simple realization and low cost. The present invention has the basic principle that firstly, the content of a non initialization code part in a Boot ROM mirror image is stored in an additional storage medium such as a hard disk; then, the content of the non initialization code part is read and processed as required when initialization codes in the Boot ROM mirror image are operated to realize the support for a large-capacity Boot ROM mirror image program.

Description

The method of a kind of storage and operation high capacity PCI expansion ROM

Technical field

The invention relates to the method for a kind of storage and operation high capacity PCI expansion ROM.

Background technology

People are more and more higher to the requirement of the every function of computing machine, impelled the complexity of computer software constantly to increase, this directly makes software become more and more huger, this problem perhaps is nothing for the storage mediums such as hard disk that calculate with 10G, 100G at present, but for some more special application scenarios, as be stored in program in the PCI expansion ROM (as remote activation card, encrypted card, hard disk reduction card etc.), still stubborn problem relatively.With regard to this series products of hard disk reduction card; manufacturer wants to take advantage in intense market competition; means and strategy are a lot; wherein increase product function; to realize the differentiation of product, give prominence to the advantage of self, be a kind of very feasible way; the hard disk reduction that adds network function (being used for management, backup etc.) as the hard disk data protection that occurs on the market blocks, and is exactly a kind of relatively more successful representative.Yet owing to be subjected to the restriction of PCI expansion ROM capacity (generally all in the 64K byte) and price, some good ideas implement difficult.

The object of the present invention is to provide a kind of method that realizes storage simple, that cost is low and operation high capacity PCI expansion ROM.Knowledge according to the PCI expansion ROM in " PCI local bus standard ", the way of realization of PCI expansion ROM program, its structure (as Fig. 1) is mainly divided initialization (Initialization) code and non-setup code part, wherein setup code must be loaded and move in the start-up course of computing machine, and its non-setup code partly can be realized flexibly.According to these characteristics, we just can size of code is bigger the PCI expansion ROM in non-setup code partial content independent, it is stored in earlier in the secondary storage medium (as hard disk), in setup code in this PCI expansion ROM when operation, as required then, read this non-setup code partial content again and handle, to realize support high capacity PCI expansion ROM.

Summary of the invention

Be above purpose, the invention provides the method for a kind of storage and operation high capacity PCI expansion ROM, this method comprises:

1.. when writing PCI expansion ROM program, in as PCI expansion ROM setup code, add the function that reads and handle data in the secondary storage medium, generate initialization section and non-initialization section binary result file by normal PCI expansion ROM development process respectively again, this setup code part still is cured in the storage medium of PCI expansion ROM, and this non-setup code content is partly write in the secondary storage medium;

2.. the setup code in this PCI expansion ROM is called when operation, reads as required to be stored in the content in the secondary storage medium and to handle, to finish the support to high capacity PCI expansion ROM.

Description of drawings

With reference to following detailed description and accompanying drawing, relevant structure that can better understand the present invention and implementation method with and purpose, feature and advantage.

Fig. 1 is typical PCI expansion ROM layout.

The PCI expansion ROM layout that Fig. 2 uses for this method.

Specific implementation method

In the following detailed description, having described specific details comprehensively understands the present invention so that provide.Yet the professional and technical personnel will appreciate that the present invention also can implement with other similar details.

Although the invention is not restricted to this,, a kind of that hard disk is as follows as the implementation step of storage and operation high capacity PCI expansion ROM secondary storage medium as a specific embodiment of the present invention:

Knowledge according to fdisk, in 63 sectors of the 0th cylinder the 0th magnetic track of hard disk, except that the 1st sector is used for MBR (Main Boot Record), remaining 62 sector all keeps need not, for simple process, we can use these 62 sectors (about 32K byte), are used for storing the non-setup code partial content of PCI expansion ROM.

1. described set by step, when writing PCI expansion ROM program, in this PCI expansion ROM setup code, add the function of interrupting reading and handling hard disc data by standard BIOS, with visit and the processing capacity of reality to non-setup code partial content in this PCI expansion ROM in the hard disk, initialization section content with the PCI expansion ROM mirror image that generates is cured in the PCI expansion ROM again, and the content of non-setup code part is write in 62 sectors of hard disk.

2. described set by step, when the initialize routine in this PCI expansion ROM is loaded and moves by computing machine, just can read as required and be stored in the content in the hard disk sector and handle, finish support to high capacity PCI expansion ROM.

Interrupt int 13h by BIOS, directly the partial function code of access hard disk sector is with reference to as follows:

Mov ax, 0202h; 2 expressions are read in the high byte, and 3 expressions are write; Represent sector number in the low byte; 202 just represent to read No. 2 the sector

Mov bx, 1000h; The memory address that is used for the storage read-write data

Mov cx, 1; Sector number

Mov dx, 80h; 80 expression Primary Hard Drives, 81 expressions are from hard disk, and 0 represents floppy disk etc.

Int 13h; Standard BIOS disk funcall

Though herein declarative description certain this feature of the present invention and a kind of implementation method, for the professional and technical personnel, many modifications, replacement, variation and equivalent substitution will appear.Therefore, protection scope of the present invention is as the criterion by the scope of appended claim.

Claims (1)

1. the method for storage and operation high capacity PCI expansion ROM, this method may further comprise the steps:

1.. when writing PCI expansion ROM program, in as PCI expansion ROM setup code, add and read and handle the function of data in the hard disk and the information of Data Position, and be used for storing the information of hard disk the 0th cylinder the 0th magnetic track 2-63 sector position of the non-setup code partial content of PCI expansion ROM mirror image, generate initialization section and non-initialization section binary result file by normal PCI expansion ROM development process respectively again, this setup code part still is cured in the storage medium of PCI expansion ROM, and this non-setup code content is partly write in the secondary storage medium;

2.. the setup code in this PCI expansion ROM is called when operation, reads as required to be stored in the content in the secondary storage medium and to handle, to finish the support to high capacity PCI expansion ROM.

Images