collapseos/blk/350
Virgil Dupras a19376df6c Copy ACIA driver to blkfs
We can get rid of acia.z80, but not of acia.fs yet, we still need it.
2020-04-23 12:42:41 -04:00

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ACIA driver
Manage I/O from an asynchronous communication interface adapter
(ACIA). provides "EMIT" to put c char on the ACIA as well as
an input buffer. You have to call "~ACIA" on interrupt for
this module to work well.
CONFIGURATION
ACIA_CTL: IO port for the ACIA's control registers
ACIA_IO: IO port for the ACIA's data registers
ACIA_MEM: Address in memory that can be used variables shared
with ACIA's native words. 8 bytes used.
Load z80 words with "352 LOAD" and Forth words with "357 LOAD".