On Tuesday, October 17, 2017, 4:28:37 AM MDT, andy pugh <bodge...@gmail.com> wrote: On 17 October 2017 at 07:47, Greg Bentzinger via Emc-users <emc-users@lists.sourceforge.net> wrote:
> Ideally it would be great if someone could design a cape/hat/shield/ whatever > that mates to the Rpi/BBB and could approximate a EPP parallel port. The hardware part exists. https://photos.app.goo.gl/SGKipu5XFvjNscfy2 (The chip is a level-shifter) I made 20 but I think I gave them all away. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 So the big question is - does the PC type EPP communication require an x86 architecture type interrupt and is there a way to write a driver that can provide that function. Using the external FPGA cards offloads much of the traffic from the unit running LCNC and hopefully will allow acceptable GUI performance. Using these boards Ethernet port as a dedicated port is an option, but then you need to add a second network connection via USB if I understand correctly. When USB started getting really popular with scanners and printers I was working help desk. We defined USB to mean Unilaterally Sucks Bad. The other little item I have been looking for is a small mega-capacitor mini-UPS that can be wired in to handle boot and power off but otherwise keep the unit alive during minor disruptions. Greg Bentzinger--- ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
