7 Commits

Author	SHA1	Message	Date
Thomas Harte	ff62eb6dce	The ACIA actually has two clocks, though on an ST they're both 500,000 Hz.	2019-10-20 20:38:55 -04:00
Thomas Harte	374439693e	Ensures serial lines know their writer's clock rate.	2019-10-20 20:38:55 -04:00
Thomas Harte	a7ed357569	Attempts to implement transmission interrupts and ClockingHint::Source.	2019-10-20 20:38:55 -04:00
Thomas Harte	4e5b440145	Attempts mostly to implement 6850 output.	2019-10-20 20:38:55 -04:00
Thomas Harte	2bd7be13b5	Decodes the 6850 control register, and starts working on standardised serial ports.	2019-10-20 20:38:55 -04:00
Thomas Harte	4b09d7c41d	Nudges 6850 towards coherence.	2019-10-20 20:38:55 -04:00
Thomas Harte	4ead905c3c	Adds an empty shell for the ACIA.	2019-10-20 20:38:55 -04:00