Hello, On Thu, 25 Sep 2003 03:31:22 +0200, Florian Zumbiehl wrote: > when trying to use a 32 kB ROM on a 3com 509b I noticed that only 16 kB of > the ROM were accessible. A bit of research showed that the ROM on these > cards is paged in 16 k chunks. > > Do you think that it is (easily) possible to change netboot so that it can > be used with such a paged ROM? Of course this is possible. I also do have the documentation for the 3C509B, and actually this page switching already works for older 3C905B (which do have a bug which requires switching) and also for Intel cards with a 595 chipset (which can only access 8kB in one chunk). It is fairly easy to implement a flash routine into makerom which allows page-switching (the 3C509B allows using Flash EPROMs - for normal EPROMs there is currently no provision for supporting page switching). All necessary functions are already there, so it's just a matter of calling a couple of subroutines. However, I don't have the necessary hardware to test it, so it never got into the distri- bution. I do have a 3C509B, but unfortunately it lacks a ROM socket. gero. -- Gero Kuhlmann Tollenbrink 18 Groote Gracht 33 gero@gkminix.han.de 30659 Hannover 26723 Emden gero.kuhlmann@arcor.de 04921/997561 =========================================================================== This Mail was sent to netboot mailing list by: "Gero Kuhlmann" <gero@gkminix.han.de> To get help about this list, send a mail with 'help' as the only string in it's body to majordomo@baghira.han.de. If you have problems with this list, send a mail to netboot-owner@baghira.han.de.
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