On 2006-11-13 16:48 -0000, Steve Wiseman wrote: > On Mon, 13 Nov 2006 15:50:38 +0000, Wookey wrote: > > >>So, fundamentally I have two significant problems: > >> > >>1) the lart dongle works on xios for bootldr, but neither of the CPLD > >>ones do, on either of the parallel ports, so I can't bringup a board > >>on that box - I have to get my laptop out. Any clues as to why this > >>might be would be appreciated. > > Have you stuck a 'scope on it? No. Our scope blew up :-( clearly a PSU problem. It is now in bits but I don't know how to fix it. Fancy a tektronics-fettling session? > Running LPT ports down cables longer than, wild guess, a foot, is enough > to make me worry about termination issues. > Any extension cable on the port is brave - are you running longer cables > fro the desktops than the laptop? Hmm. good guess. Yes, normally. I'm sure I have used extensions form the laptop too OK, but may not have tried direct-connection to xios. (the programming has always been done down extension cables on previous machines OK, so I kind of expected it to work...) > It's also possible that the laptop has nice low-power drivers on its > ports, slewing slower and causing less pain. OK. I'll try a direct-connection and see if it helps at all. > I detest LPT JTAG with a passion. However, it does sound like you ought to > come round for a debug session. That would be useful. I've just been peering at bflash to see why it doesn't work on balloon2 - this reminds me that my JYTAG understanding is weak at best. Wookey -- Aleph One Ltd, Bottisham, CAMBRIDGE, CB5 9BA, UK Tel +44 (0) 1223 811679 work: http://www.aleph1.co.uk/ play: http://wookware.org/