Thanks Dan! Yep, I created two versions: one capturing READS + interpreting the video address, and another one capturing the 6502 writes. With the latter was much easier to tune the timings, so that's what I'm doing.
I use 8 bits in parallel, hooking the BBB to the Apple II peripherals bus. I need 24 bits in total, so I use some electronics (a multiplexer and 3 buffers), and time everything to capture each byte at the right time (ADDRESS LOW, ADDRESS HIGH, DATA). It's a pity that HDMI on the BBB steel so many pins from the PRU, otherwise I could write to the bus, emulate audio on hdmi, etc... PRU are amazing! On Thu, Nov 21, 2019 at 5:24 PM Dan Julio <[email protected]> wrote: > Very neat Tomas! > > A PRU is capturing the write to the video memory? Are you reading the > data in via a parallel interface or serializing it? > > Cheers, Dan > > On Wednesday, November 20, 2019 at 9:19:44 AM UTC-7, Tomas Espeleta wrote: >> >> Helllo Guys, >> I just wanted to share the first steps of my project: take a look to my >> facebook post: >> >> https://www.facebook.com/groups/5251478676/permalink/10159148656378677/ >> >> Best, >> Tomas >> > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/040e4533-bba5-4ee7-8fd8-3ff776e8db63%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/040e4533-bba5-4ee7-8fd8-3ff776e8db63%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALNrYmvc6rFSpxC3kNbODw%2B%3DU-Zhvj1TqCck%3D_3bx5Wmz7fXkw%40mail.gmail.com.
