Re: [Etherboot-developers] eepro/100 problems

[Alexei A.R. <A.A...@in...>]

On Wed, 4 Apr 2001, Marty Connor wrote:

> On 4/4/01 3:08 AM Alexei A.Romanenko A.A...@in... wrote:
> >I compile ROM image using etherboot-4.6.12 for my network card
> >and place it as binary data into  AM27c512-120JI chip (eprom, 512 
> >Kbit, 64Kx8, 120ns)
> 
> I would try a 27C256-100, which is a smaller, faster EPROM.  It could be 
> that your card is not capable of seeing that size/speed of EPROM.
  
   Intel declare, that ROM for the card must be 150ns, or faster.
So, i don't think the reason in speed of EPROM

> 
> >when i turn pc on it says nothing refered to booting via LAN
> >(first boot from LAN is set in BIOS), although after installing
> >bootstrap for LILO, computer boots well.
> 
> Get the DOS debug program, and search for the contents of the ROM in 
> memory.
> 
> (by the way, could someone please send an actual DOS debugging session 
> showing how to find EPROM contents in memory?  I am writing documentation 
> for Etherboot, and would like to give an example for novices.  I guess I 
> could define LPT to COM1 with some DOS mode command and capture the 
> output of the serial port in a buffer, but if anyone knows a better way, 
> I'd sure appreciate it.)

Where can I find that DOS debug program?
how it is possible to find contents of the ROM in memory? It will
be rewriten by something else (by command.com for example) 

> 
> Anyway, I generally find problems with having ROMs recognized these days 
> seems often to have to do with speed.  If the card doesn't insert enough 
> wait states, then the CPU may try to read the ROM too fast, and think it 
> is not there.
> 
> Maybe someone who knows more intimate details can be of more assistance.
> 
> Marty
> 
> ---
>     Try: http://rom-o-matic.net/ to make Etherboot images instantly.
> 
>    Name: Marty Connor
> US Mail: Entity Cyber, Inc.; P.O. Box 391827; Cambridge, MA 02139; USA
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> 
> 
> 
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    Alex
-------------------
    A.A...@in...