On Thu, Mar 14, 2019 at 12:28 AM Michael Brown <mc...@ipxe.org> wrote:
> On 13/03/2019 17:26, Quinn Plattel wrote: > > Thanks for the quick response. Here is the banner message: > > > > iPXE (http://ipxe.org) 04:04.0 6800 PCI3.00 PnP PMM+00106D80+00000000 > CE00 > > Press Ctrl-B to configure iPXE (PCI 04:04.0)... > > Thanks; that explains the root cause of the problem. > > The BIOS is allocating a PMM block at 0x106d80 to hold a copy of the raw > ROM image, but failing the second PMM allocation for the temporary > decompression area. > > The default temporary decompression area used by iPXE if PMM allocation > fails is at 0x100000 (i.e. the start of high memory). The decompressed > ROM image is therefore overwriting the copy of the raw ROM image, which > leads to the CRC32 checksum failure. > > What banner line did you get on this system with the (working) DFE-530TX? > > Thanks, > > Michael > Hi Michael, I did another type of test now: I disabled AUTOBOOT_ROM_FILTER in config/general.h and recompiled the 905b rom file. I then flashed it to the 29C512 chip but this time I installed this chip into the DFE-530TX D-Link card. I put both cards into the same machine with the 3com card installed without a bootrom chip. When I started the machine, the 3com code in the d-link card executed successfully this time and found the 3Com pci card and did a successful dhcp connection. Interestingly both roms report 00000000 on the second address of there banner pages. Quinn
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