Yep, 2x is probably better. Having one handy really helps following the traces. Printing the layout is good too, but a physical board is better.
Do we have an idea on the target price for the protos? On 30/04/14 19:46, David Fry wrote: > Hi Dave, > > I'll go to a local print shop and have A2 sized printouts of the CAD > drawings done, > > are you sure you want two PCB's Dave ? > > How about you Fabio ? > > regards > > David Fry > > On Saturday, April 26, 2014 5:56:07 PM UTC+1, monahanz wrote: > > I think we need to do a prototype run on that board first. While > it contains elements of 3 previous boards we did, it is the first > time they are all put together in one place. Also as a few of us > know, we had real problems with that BT478 chip on the VDP board > (which itself BTW needs to have another prototype run). > > > > On the 7220 I will help out with the hardware, the thing to > remember about the 7220 is you have to do quite a bit of software > writing to get it to be of any use. Is somebody prepared to do > that. Because without software that chip/board is useless. > > > > John > > > > > > *From:*[email protected] <javascript:> > [mailto:[email protected] <javascript:>] *On Behalf Of > *David Fry > *Sent:* Saturday, April 26, 2014 7:40 AM > *To:* [email protected] <javascript:> > *Subject:* Re: [N8VEM-S100:3295] S-100 boards in work > > > > Hi Ed, > > > > Andrew has uploaded the EDA files for the uPD7220 GDC this > afternoon, if you feel inclined to do a production run then put me > down for 1 board > > just for curiosity value. It might be worth considering a smaller > run of 5 to 10 boards as this board has failed to spark sufficient > interest for a production run > > before. looking a previous forum posts for the uPD7220 GDC it > would appear to be a descendant of the ECB uPD7220 graphics board > interfaced to the S100 bus and is ripe for testing. > > > > > https://groups.google.com/forum/#!searchin/n8vem-s100/upd7220/n8vem-s100/KNTuzzAdKbU/XIY-yZTK4dUJ > > <https://groups.google.com/forum/#%21searchin/n8vem-s100/upd7220/n8vem-s100/KNTuzzAdKbU/XIY-yZTK4dUJ> > > > > Regards > > > > David Fry > > > On Friday, April 25, 2014 11:19:04 PM UTC+1, Edward Snider wrote: > > It does seem like it would be an interesting board for an S100 > system. > > With almost all of the work done it would be a shame not to go > through to completion. > > > > Unfortunately I don't have enough of a system together to help > in testing, but I can chip in a bit > > for prototypes. I'd also be willing to handle the production > run if we can get takers for at least > > 20 boards, if that would be helpful. > > > > Ed > > > > > On Tuesday, September 24, 2013 1:45:38 AM UTC-5, nekonoko wrote: > > Hi Andrew, > > I can definitely see chipping in at least some of the cost. I > find the uPD7220 GDC interesting as several business class > CP/M systems used it for graphics (DEC Rainbow, QX-10 etc.). > > Thanks much, > > Pete > > -- > You received this message because you are subscribed to the Google > Groups "N8VEM-S100" group. > To unsubscribe from this group and stop receiving emails from it, > send an email to [email protected] <javascript:>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. > > -- > You received this message because you are subscribed to the Google > Groups "N8VEM-S100" group. > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected] > <mailto:[email protected]>. > For more options, visit https://groups.google.com/d/optout. -- Dott. Fabio Battaglia -- You received this message because you are subscribed to the Google Groups "N8VEM-S100" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
