RML380Z ROM images
ard at p850ug1.demon.co.uk
Tue Jun 28 12:48:27 CDT 2005
> On Mon, 2005-06-27 at 23:16 +0100, Tony Duell wrote:
> > >
> > >
> > > Does anyone happen to have ROM dumps of from the RML 380Z CPU board?
> > I cna;'t help you, alas. IIRC, some RMLs used the TI 3-rail 2716s that
> > most programmers can't handle. I assume you've checked for this...
> Aha no I hadn't - and you were spot on! :) I didn't realise that TI's
> 2716 was a three rail device and their 2516 was equivalent to everyone
> else's 2716. You learn something new every day and all that :-)
Don't worry, that caught me out <mumble> years ago. And I am still making
equally stupid mistakes...
> The CPU board ROMs in both this 380Z and my own one are TMS2716's as it
> happens (yet the 80 col board character ROM in the one machine uses a
As I mentioned, that's what hte infomration file (which is what RML
called the technical manual) shows.
> I wonder if I can modify my programmer to at least read three-rail
> devices (it'd be handy to be able to read 2708's on it anyway). Maybe
> via a little carrier that supplied the other two rails to the chip. I'll
> have to grab the relevant datasheets...
It will deepnd on your programmer. If it does something clever (like
tries to read at non-standard Vcc levels to check the data is reliably
programmed, or if it chacks the device's Vcc current), it may not work.
Otherwise it should be fine.
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