## Physical Device Driver Reference

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### Category 80h, Function 04h - Remarks

Various types and categories of data are returned by the Read Function Configuration Information call. The information returned includes the following data types:

Return code
Return code flags
Four-byte Compressed ID
Memory Configuration
ID and Slot Information
Interrupt Configuration
CFG File Extension Revision Level
DMA Channel Description
Function Information
Port I/O Information
Type and Subtype ASCII String
Initialization Data

The data returned by the Read Function Configuration Information call includes an EISA-defined 320-byte block. The format of this EISA-defined 320-byte block is dependent on both the EISA revision level of the hardware installed on your personal computer and the value of the returned Function Information byte. Refer to the technical reference documentation for your personal computer hardware for details of this 320-byte block. The Register column in the table indicates the register that contains the data if the EISA BIOS was accessed directly and not through OEMHLP.