Re: [Etherboot-developers] NIC file and ROM images

[<ke...@us...>]

>A.2  PnP Option ROM Header
Offset    Size     Value    Description
>-----------------------------------------------------
>00h       BYTE     55h       Signature byte 1.
>01h       BYTE     AAh       Signature byte 2.
>02h       BYTE     Varies    Option ROM length in 512-byte blocks.
>03h       4 BYTES  Varies    Initialization entry point.
>07h       17 BYTES Varies    Reserved.
>18h       WORD     Varies    Offset to PCI data structure.
>1Ah       WORD     Varies    Offset to expansion header structure.
>
>So my question is, can we have something like:
>
>PnP option ROM Header size 64K
>512 bytes later, PnP option ROM Header size 64K - 512 bytes
>512 bytes later, PnP option ROM header size 64K - 1024 bytes.
>etc.

Interesting. How about this variation:

PnP option ROM Header size 512 bytes, jump to start
PnP option ROM Header size 512 bytes, jump to start
...
PnP option ROM Header size 512+x bytes, jump to start
start of code (x bytes)

Problem is the BIOS might be entitled to map in only as much of the ROM
as the header declares.