Appendix F: Jida Standard; Obtaining Information About Boards That Use The Jida Standard - Kontron MOPSlcdGX1 Product Manual

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MOPSlcdGX1 Product Manual

25. APPENDIX F: JIDA STANDARD

Every board with an on-board BIOS extension supports the following function calls,

which supply information about the board. Jumptec Intelligent Device Architecture

(JIDA) functions are called via Interrupt 15h. Functions include:

• AH=Eah

• AL=function number

• DX=4648h (security word)

• CL=board number (starting with 1)

The interrupt returns a CL≠0 if a board with the number specified in CL does not exist.

CL will equal 0 if the board number exists. In this case, the content of DX determines if

the operation was successful. DX=6B6Fh indicates success; other values indicate an

error.

To obtain information about the installed boards that follow the JIDA standard, use the

following procedure.

1. Call Get BIOS ID with CL=1.

The name of the first device installed will be returned. If you see the result Board

exists (CL=0), increment CL, and call Get BIOS ID again.

2. Repeat until you see Board not present (CL≠0).

You now know the names of boards that follow the JIDA standard.

3. You can find out more information about a specific board by calling the appropriate

inquiry function with the board's number in CL.

Note: Association between board and board number may change because of configuration

changes. Do not rely on associations between board and board number. Use the

above procedure to determine the association between board and board number.

Refer to the JIDA manual in the

implementing and using JIDA calls with C sample code.

Kontron Embedded Modules

jidai110.zip

folder for further information on

Appendix F: JIDA Standard

Revision 1.3

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