[E3-hacking] Re: [E2 hacking] E2 monitor v0.24 ;)

Matt Evans matt at axio.ms
Fri May 27 11:44:13 BST 2005

Hi Adam,

On 27 May 2005, at 08:02, Adam Coventry wrote:
> I had assumed the rapid light flashing was driven by
> an active pbl and that the absence of those lights
> meant that I had somehow trashed pbl.  I assume what
> actually happens is that the lights flash as pbl scans
> the NAND for headers.  Since the monitor was loaded
> into address 0 and did not chain other blocks there
> was no searching to do and therefore no reassuring
> light show.

Ah yes, I think that's what happens.  (Or, it's flashing when it's 
loading the first splashscreen thing - which is much larger.  Maybe it 
currently does flash but only once, really quickly, so you don't see it 
or something... my E2 is out of the case so I don't have LEDs wired 

> I _did_ manage to interrupt my (failed?) monitor
> program with pblq and reloaded a 57600 version (to
> overcome my flaky serial).  Now I am presented with a
> proper monitor prompt, and all is well!

Good stuff!  I forgot to upload the other night, but there's a new 
version of the monitor that you may find more useful:

..contained in..

This version boots other stuff from flash (so is actually useful (he 
says - my biggest test program so far splats a big image on the 
screen...)).  The XMODEM stuff should be slightly more 
resilient/well-behaved but still isn't perfect.



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