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Rockbox mail archiveSubject: Re: Survey: who has a non-V1 boot ROM?Re: Survey: who has a non-V1 boot ROM?
From: jmp <jdon_at_wanadoo.fr>
Date: Mon, 22 Sep 2003 13:05:16 +0200 On Mon, 22 Sep 2003 11:40:47 +0200 (MEST), [IDC]Dragon wrote: > Hello Rockboxers, > > since a while the hardware info screen (Debug->HW Info) computes a CRC > across the boot ROM, to identify it. This ROM is built into the CPU and is really > permanent, not to be confused with Flash. > > The majority has what I called V1 for version 1. This bootcode is identical > to Players, Recorders, FMs. I exploit its features for my Flash bootloader > and the UART boot mod. So if you have flashed already, you for shure have V1 > and can stop reading here. > > However, some boxes are different, have what I call a V2 boot ROM which > expects a different Flash layout. This is the reason why I have no Flash support > for those yet. > > So, even if you don't like flashing, can you please check if your ROM CRC > value is different from 0x222F, the V1 value? In that case please post here, > tell us which model you have. V2 users will find 0x8C1E. I'd like to find out > how many there are, if it's worth spending effort on it. If you discover a > value different than these two, I'd say "oh no" but be highly interested and > want a dump from you. > > My current status on V2: > - I have looked into the bootrom, found it has the Archos flash monitor > already in there, versus the V1 boxes have in flash. See my old post for details: > > http://rockbox.haxx.se/mail/archive/rockbox-archive-2003-06/0287.shtml > > - There is no UART boot mode like the one I exploited for my mod, but > something better (requires no further mod than serial): > > - I analyzed how this monitor works, know how to operate it. It indeed has > the capability to reflash within certain areas, but can also be used to > download and start arbitrary code over the serial link. > > - I have modified my UART boot mode tool to work with the Archos monitor > instead, use it to transfer and start my "minimon". With V2, this again allows > to fully reprogram from scratch, even if completely messed up, it is the > safety net. I like to have that first, before any flashing experiments. > > The follow up question would be: Is there somebody with a V2 bootrom who > has/can do the serial mod to verify this? We can start easy, first blink the > LED, more as you like. > > Jörg Studio 6000: ROM: 5.06 USB: neg ATA: 0x300 MASK: 0000 Flash: BF,D6 Regards, Jean. Received on 2003-09-22 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |