Re: Q-bus I/O project

2015-10-12 Thread John Wilson
On Mon, Oct 12, 2015 at 11:30:39AM -0400, Paul Koning wrote: >> ... but I'd rather go RoHS. > >I would recommend against that. Not unless you are trying to create a >commercial product where you *must* be RoHS to conform to the requirements >of the bureaucrats. Use real solder -- the job will be

Re: Q-bus I/O project

2015-10-12 Thread Jon Elson
On 10/12/2015 10:30 AM, Paul Koning wrote: On Oct 11, 2015, at 12:53 AM, John Wilson wrote: ... but I'd rather go RoHS. I would recommend against that. Not unless you are trying to create a commercial product where you *must* be RoHS to conform to the requirements of the bureaucrats. Use r

Re: Q-bus I/O project

2015-10-12 Thread Paul Koning
> On Oct 11, 2015, at 12:53 AM, John Wilson wrote: > > ... but I'd rather go RoHS. I would recommend against that. Not unless you are trying to create a commercial product where you *must* be RoHS to conform to the requirements of the bureaucrats. Use real solder -- the job will be much eas

Re: Q-bus I/O project

2015-10-10 Thread John Wilson
On Sat, Oct 10, 2015 at 11:38:45AM -0400, Paul Koning wrote: >Did you check the PHY latency for GigE? I know it's insanely large for >10G-BaseT, but I don't remember if GigE is still reasonable. I was worried about that, since other PHY data sheets list high-ish numbers (hundreds of nsec) as if t

Re: Q-bus I/O project

2015-10-10 Thread Toby Thain
On 2015-10-10 2:10 PM, David Bridgham wrote: Wow. A pretty board indeed. Thanks for showing it off. This is also interesting to me since a friend and I have been talking about building something rather similar (and entirely different at the same time, we're just focusing on the mass storage f

Re: Q-bus I/O project

2015-10-10 Thread Paul Koning
> On Oct 9, 2015, at 9:38 PM, John Wilson wrote: > > ... it's > supposed to be a Q-bus bridge that connects over Ethernet), but I wanted to > still be able to do something fun in the very likely case that the Ethernet > port doesn't work (no idea if my PCB layout is kosher for something as fast

Re: Q-bus I/O project

2015-10-10 Thread Tothwolf
On Fri, 9 Oct 2015, John Wilson wrote: On Fri, Oct 09, 2015 at 09:48:18PM -0500, Jay Jaeger wrote: Do U17,U15,U10,U6 perhaps have some solder bridges, or is that just some flux hanging around? It's flux, but thanks for the heads-up! I went over everything with liquid-flux-soaked solder-wick

Re: Q-bus I/O project

2015-10-10 Thread Johnny Billquist
On 2015-10-10 03:38, John Wilson wrote: This may never see the light of day (if the prototype turns out to be stillborn) but it's pretty and I can't resist posting a pic before I've powered it on and proven its uselessness: http://www.dbit.com/wilson/projects/qba.jpg Crazy amounts of p

Re: Q-bus I/O project

2015-10-09 Thread Jay Jaeger
On 10/9/2015 9:58 PM, John Wilson wrote: > On Fri, Oct 09, 2015 at 09:48:18PM -0500, Jay Jaeger wrote: >> Do U17,U15,U10,U6 perhaps have some solder bridges, or is that just some >> flux hanging around? > > It's flux, but thanks for the heads-up! I went over everything with > liquid-flux-soaked

Re: Q-bus I/O project

2015-10-09 Thread John Wilson
On Fri, Oct 09, 2015 at 09:48:18PM -0500, Jay Jaeger wrote: >Do U17,U15,U10,U6 perhaps have some solder bridges, or is that just some >flux hanging around? It's flux, but thanks for the heads-up! I went over everything with liquid-flux-soaked solder-wick and a stereo microscope ... there were a t

Re: Q-bus I/O project

2015-10-09 Thread Jay Jaeger
Do U17,U15,U10,U6 perhaps have some solder bridges, or is that just some flux hanging around? JRJ On 10/9/2015 8:38 PM, John Wilson wrote: > This may never see the light of day (if the prototype turns out to be > stillborn) but it's pretty and I can't resist posting a pic before I've > powered it

Re: Q-bus I/O project

2015-10-09 Thread Jay Jaeger
Quite a piece of work. I hope you can continue to plug away at it. I get that bit about mistakes. Even my simple PIC-based Documation card reader interface board had a mistake (fortunately, one I could easily fix without having to create a new board). Fortunately, my Mark-8 boards ended up mist