I modify the image used in the eprom because i am using a wrong oneThat's easy. You get a 16k image and want it to appear as 64kjust 4times in a row:
the correct I identify by booting de lzdisk image in a diskette
BUt the flash eprom not boot in the card in despite off i enable the eprom in the card using diag.exe program
The card is a Via Rhine 6105
and the pc is an old P120 without LAN boot option in setup.
I think part of the problem is the size of the eprom ( 64 K) flash 29f2008
and may be too the type of eprom , I use one taken off an old socket7 mother
I heard in a mail in this list that somebody grab 4 times( 16k x 4 ) in the eprom
the image, in this way the card work.
But I dont know how to do this..
# cat eb-via.zrom eb-via.zrom eb-via.zrom eb-via.zrom > eb-via-4times.zrom
You are not going to have success with a 29... flash rom probably with any cheapo via NIC. At least some cheapo NICs I tried with flash ROMs did not work.
Those are better. You first take off the sticker above the UV window. Then place them about 30 cm from the UV tube (else they get really hot, I assume that's not too good for the plastic casing of those ROMs). Take off any filter the tube could have (which could filter out the "interesting" parts of light spectrum). Care not to look into the lamp after that. No idea wether that causes cancer or so. Let it alone for some hours (3-4). You should before beginning read out the chip. If after some hours, at least part of the chip was erased, you know it needs some more time.I am using a Willem PCB3 eprom programmer (www.willem.org) and works fine , but how i grab an eprom 4 times secuentially ?
I have 2 more eproms to try , but I don 't know how to erase them one 27c512 an a 27c4001 , i try with a UV tube and 2 or three hours
but nothing happens it's still have his programming old data.
The 27c512 should be the right size, 64k. That's fine for most NICs. As described above, you can write the etherboot image four times into the ROM which should work in case the NIC is some dumbass one that only has 14 address lines to the ROM socket (which was the case with some of my cheapo NICs). If the NIC claims to support 64k ROMs, you probably can just burn it once and let the remaining 48k free.
HTH
Anselm
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