Johnny's homebuilt 8080 CPU corner (and other stuff, maybe)
XBUS RTC - Real Time Clock
Of course can't a seriusly 8080 be without a RTC, so I had to make one.
This was my first version, oddly named 1.1, but once again I fell on the parallel interfacing an ATmega processor to the 8080.
Version 101 uses a ATmega328P to "talk" to the clock ship using I2C and where intended to simplify it all for the 8080 by exposing a simpel parallel interface.
Version 2.0 instead uses an Epson RTC-72421 chip that are parallel, making a child play to interface
to the 8080. So far I haven't got time to test it, but it's there on the table, waiting.
To join the Homebuilt CPUs ring, drop Warren a line, mentioning your page's URL. He'll then add it to the list.
You will need to copy this code fragment into your page (or reference it.)
Note: The ring is chartered for projects that include a home-built CPU. It can emulate a commercial part, that′s OK.
But actually using that commercial CPU doesn′t rate. Likewise, the project must have been at least partially built: pure paper designs don′t rate either.
It can be built using any technology you like, from relays to FPGAs.