Casio CZ/ VZ/ FZ - Pro Series

So now that my old dead RA500 RAM card has been replaced, I decided to cut the old one open to have a look inside. If it wasn't too different to the reasonably common and cheap RC100 it might be possible to convert a ROM card into an RA500 by pulling out the ROM chip and putting in the RAM chip used in the RA500.

After opening it up, I found that it does look reasonably possible. There are only 2 extra components in there more than the ROM - a small logic chip and a diode. The RAM chip is the same size as the ROM chip and has almost the same pin layout to the ROM, so it would not be hard to re-rout the circuit board tracks to compensate for this. I wrote up my findings and posted them here at Steve's EZ-VZ website if anyone is interested in the possibility of DIY RA-500 RAM cards:

http://www.chatpage.co.uk/easyveezee/

(The most recent posts start at the bottom of the page)

Cheers, Graham

I've also put the card internal photos and parts list and info here on my band's website:

http://www.warningwillrobinson.com.au/index_files/RA500.htm

Cheers, graham




--- In CZsynth@yahoogroups.com, "Graham" <gmeredith1@...> wrote:

>
> So now that my old dead RA500 RAM card has been replaced, I decided to cut the old one open to have a look inside. If it wasn't too different to the reasonably common and cheap RC100 it might be possible to convert a ROM card into an RA500 by pulling out the ROM chip and putting in the RAM chip used in the RA500.
> 
> After opening it up, I found that it does look reasonably possible. There are only 2 extra components in there more than the ROM - a small logic chip and a diode. The RAM chip is the same size as the ROM chip and has almost the same pin layout to the ROM, so it would not be hard to re-rout the circuit board tracks to compensate for this. I wrote up my findings and posted them here at Steve's EZ-VZ website if anyone is interested in the possibility of DIY RA-500 RAM cards:
> 
> http://www.chatpage.co.uk/easyveezee/
> 
> (The most recent posts start at the bottom of the page)
> 
> Cheers, Graham
>