[s1mp3-dev] Building Firmware

[Legolas]

A Geek ha scritto:

> hello ppl,
>
> I read about firmware and BREC from wiki and i have few questions
>
> 1. Is the BREC written in z80 assembly language ???

Yes

>
> 2. If so , can i write a z80 program and replace in place of BREC???

Consider that BREC is an EEPROM (read about it), so we do not want to 
use it for testing; luckly now we have loadram to make tests on the 
ZRAM. We could anyway write to BROM (read about it if you havent) if we 
had ICE, since with it we would be able to write any number of times 
(with the current USB driver we can't)

>
> 3.Since mp3 update tool recognize for correct BREC how can i burn my 
> test BREC ???

You would be able to write it only once...I do not suggest you to do 
this, unless you want to kill your player. (and, before ICE age, it is 
not advised)

>
> Main moto for which i am asking is to write a small program which is 
> not dependent on all the resources and other stuff
> and run it on player.

So, use loadram! Your small program would be useful to better understand 
the hardware, when you get some research post on the mailing list, soon 
we will create a /research/ team, maybe with Jeroen too.

--
  Legolas

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