Analogue-sequencer

Folks,

I've had bad news and good news this week...
Bad news was the CPU used in P3, the T89C51RD2 has been discontinued 
and my suppliers have no further stock. That was a shock, I can tell 
you...
The good news is that it has been superseded by a new part, the 
AT89C51ED2.
However there are changes to the way the in-system programming works 
on this CPU that means I'm going to have to write a new bootloader 
for the new processor. So shipping of PCB/CPU only kits will be 
delayed until I can get that done and thoroughly tested.
This is likely to mean a new bootloader will also be required for 
existing units so I don't have to generate different firmware 
images for old and new processor versions.
Hopefully this work will be complete before the cases arrive, so 
wont delay full kits or ready built units.
I'll keep you posted.

Cheers,
Colin f

--- In analogue-sequencer@yahoogroups.com, "colinfraser_com"
<colin@c...> wrote:
> 
> Folks,
> 
> I've had bad news and good news this week...
> Bad news was the CPU used in P3, the T89C51RD2 has been discontinued 
> and my suppliers have no further stock. That was a shock, I can tell 
> you...
> The good news is that it has been superseded by a new part, the 
> AT89C51ED2.
> However there are changes to the way the in-system programming works 
> on this CPU that means I'm going to have to write a new bootloader 
> for the new processor. So shipping of PCB/CPU only kits will be 
> delayed until I can get that done and thoroughly tested.
> This is likely to mean a new bootloader will also be required for 
> existing units so I don't have to generate different firmware 
> images for old and new processor versions.
> Hopefully this work will be complete before the cases arrive, so 
> wont delay full kits or ready built units.
> I'll keep you posted.
> 
> Cheers,
> Colin f

Poor Colin!
Hopefully this will work out (2 diffrent bootloader)...
Stefan

Hi Colin

> The good news is that it has been superseded by a new part, the 
> AT89C51ED2.

Talk about last minute surprises !!!!! :-(

I guess its pin compatible with the old part then ?
Apart from the hassle its giving you right now, are there any 
potential benefits ... new and more powerful instructions in the 
instruction set perhaps ?

I'll take it that the priority on the info I asked for has gone down 
a couple of notches then. ;-) ;-) ;-) ;-) ;-) ;-)


Dave