Re: EPROM speed question

[markus@infoscape.com]

Vlad Lungu writes:
 > On Sun, 22 Feb 1998, Georg Hager wrote:
 > > I have managed to get a 16k boot image run from a floopy -- everything
 > > works fine. After burning the image.rom into a 27128 EPROM and plugging it
 > > into my NE2000 clone (yes, it allows 16k), the client didn't recognize the
 > > presence of the PROM and booted from the local disk. With DEBUG I found
 > > out that the PROM did not appear at the memory location I had specified in
 > > the NE2000 setup (D8000); all it reads there is 0xFF. If I remove the PROM
 > > from the card, DEBUG reads 0x80 from those locations.
 > I've had the same problem with an el cheapo NE2000 clone. I was burning an
 > 8k image into an 2764, and since the card didn't supported 8k proms I've
 > set the card to 16k PROM size. After 2 days of hair pulling, I 've
 > configured by mistake the cord for 64k PROM's and voila! everything was
 > OK. It seems that some clones doesn't actually support 16k PROMs, so you
 > should try setting the card for 32k or 64k PROMs even you have a smaller
 > one. Anyway, it worked for me. BTW, the PROM was 200ns.

As a quick way of testing whether the ROM was installed properly, you
should consider running romscan.c It comes with the "etherboot"
distribution.


Markus

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Markus Gutschke                         Internet: markus@infoscape.com
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