Analogue-sequencer

Hi Tom, 

> At first all was OK, but than it went all crazy.
> I turned it off, rebooted, only to receive a CHK FAIL = 2681 (BOOT -
> FLASH) message.
> 
> So what does this mean?

It means the boot-time checksum calculated from the main program is
incorrect - one or more bytes in the flash ROM must have become corrupt.
So long as the bootloader code is unaffected, re-loading the OS by sysex
should fix it.
If the bootloader is affected (not very likely), I can usually erase the
whole chip and re-flash it.
That would mean brief holiday for your CPU in Scotland.

Best regards,
Colin Fraser
Sequentix Music Systems Ltd
http://www.sequentix.com