Rockbox mail archive
Subject: Re: Survey: who has a non-V1 boot ROM?
From: Klaus Heerlein (Klaus.Heerlein_at_online.de)
Just bought another JBR10 for my girlfriend -
Rom type V2 0x8C1E
A collegue bought another one .
We would be glad if you would manage to make it possible to
flash those also. On my older JBR20 its working like a charm
- so anyway big big thanks for all your work !
On one hand I am a bit anxious ... - but I have the tools
for the serial mod so if no one has done it already I could
do it with your help.
> 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.
> 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.
Page was last modified "Jan 10 2012" The Rockbox Crew