[jornada] Re: Jornada Flashboard

Mark Gollahon <golly <at> stellarwerx.com> writes:
> All:

Hi there !

i'm a new J680 + J720 owner and want to *play* with it :-)
so i'm googling around...

> Thank you for all of your thoughts for my new addition! This is actually our
second - our first is now four
> years old.
>
> Anyway, to answer some of your questions: Yes, I am pretty sure that I can
"squeeze" 64Megs of RAM onto the
> flashboards. All I need to do is to read the part numbers off of the chips on
my fried daughtercard as the J728
> has 64Megs RAM. Actually, I am going to try and get as much RAM and flash on
it as I can, barring any problems
> with the Jornada's memory map (i.e. what is RAM and what is flash, etc.).
Also, I want to put at least 32Megs
> of flash on it, but I need to review the memory map and be sure I'm not
clobbering anything.
>
> The hardest part of the whole process is figuring out how to program the flash
for the first time. There are
> two possiblities:
>
> 1. program the flash, then solder it to the board, or
> 2. solder it to the board, then program the flash.
>
> Programming the flash first makes logistics a little easier as I can simply
find the nearest standard flash
> programmer and have at it. However, if I (or anyone else for that matter)
bricks a board, the board is pretty
> much dead unless the flash chips are removed and reprogrammed - and removing
SMT chips is *not* fun.
>
> Programming the flash after the chips are on the board means that I need to
design and build a special
> programmer, but makes the whole process easier and bricking a board is "no big
deal". This is the option I am
> currently exploring. I am fairly certain I can use a USB interface to a PIC
microcontroller and let the PIC
> handle the programming. However, I don't have any PIC experience, but I do
know someone who does.

'I' have a PIC experience :-P

look at the guy with the red pullover, that's me :
http://whygee.club.fr/drosephylia/index.html
and i have done all the electronics there.

oh, and now i know how to solder 0.5mm pitch components :-)

> Anyway, that is where I am currently. Any and all ideas are welcome.
>
> Regards,
> -Mark Gollahon
Received on Fri Jul 01 2005 - 04:13:47 EDT