This stuff is moving so fast that it is hard to keep up with all the refinements :^)
But that also means that for new ULX3S users it can be confusing. Even examples, projects and discussion threads from just 6 months ago can already be out of date. Kinda like Linux around 1997.
- v = tvp->tm_year; v -= 100; v = (((v/10)<<4) + (v%10)); + v = tvp->tm_year; v %= 100; v = (((v/10)<<4) + (v%10));
date -s "2020-10-03 11:23
@emard thanks for i2c info. I think my 12F board is skriptarnica from the early 2019 run, so I will check. My 85F is a blue Wattenrott.
My current ping time is 600ms, but I think I have a reasonable chance to get that down to 300ms. This is better than the Arpanet backbone from 1980, which had 1 second ping times (although "ping" did not exist yet). However, back then on a LAN ping times of about 50ms were achieved, using dedicated boards, that often had their own buffer memory and DMA circuits.
I'm thinking about using a ENC28J60 PMOD. This is available in a 28 pin 0.1" pin-through-hole package for a future retro board and the TI990 chips have a "cru" I/O bus that is pretty similar to SPI. Another route could be to run the ESP32 PPP link at 115K2 or something like that and use a sram (bram) buffer. I am too fond of the self-contained aspect of the ESP32 solution to let it go easily.