Re: Q-bus I/O project

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

Re: Q-bus I/O project

> 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

Re: Q-bus I/O project

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

> 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

Re: Q-bus I/O project

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

Q-bus I/O project

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 function and using an FPGA). I'm curious about

Re: Q-bus I/O project

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

Re: Q-bus I/O project

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

Re: Q-bus I/O project

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

Re: Q-bus I/O project

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

Q-bus I/O project

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 Officially it's for my morally repugnant attempts to earn a

Re: Q-bus I/O project

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

Re: Q-bus I/O project

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