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IBM PowerPC 740 port


Follow eCosians:

I have a custom 5 board CompactPCI system (every 
board built custom, right down to the backplane).
This system is just SBC w/FLASH&SDRAM, 
2GB of SDRAM mass buffer, and some exotic 
interfaces (1553, funky fiber, a proprietary serial 
interface, CAN bus, ...).   No disk, no network, 
no user interface -   Its  a main data computer 
for an experiment on the International Space Station.

Right now we are running a fairly recent LINUX on
this system, wringing out the wiring bugs. 
 
I am interested in exploring the use of a lighter 
weight OS to implement the application when 
we are done with this testing phase. To get up to 
speed on eCos I have played a fair amount with 
eCos on a ARM platform so I know it is up to 
snuff for what I need.  

I have not however learned much about the 
internals of eCos and have no feeling about 
the level of difficulty of doing a hal port.

I have seen some chatter in the archives about
how easy it would be to cobble up an eCos for
the PowerPC 740 based on the eCos 860 code:

> From: Kevin Hester KHester@opticalnetworks.com 
 >Date: Thu, 22 Apr 1999 14:11:47 -0700 
>
> Yep.  I used the eCos 860 code (and I contributed the 860 FADS support).
> The total setup is only a couple of pages of assembly, I suspect minor
> tweaking would be required for the 821/740.  I think the 740 has BAT
> registers.

Does anyone have suggestions or comments?

Is the 860 port still the place to start?

Anyone have a better starting point they would like
to share?

I know there is plenty of for pay support available,
this is an option, but a distant one.  This is an
academic project and there is more sweat than
cash.

Peter Dennett                     Email: pdennett@padsoft.com
61 Harbor Lane                  Web:  www.padsoft.com
Kemah, TX 77565               Web: www.boatbrains.com
Voice: 281 334 3800         Cell: 713 899 6100    



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