The CCS Model 2830
Six Channel Serial I/O Board employed
three Z-80 DARTs (Dual
Asynchronous Receiver/Transmitters) and a Z-80 CTC
to provide six programmable serial ports with programmable baud rates. Designed
to conform to the IEEE 696/D2 specifications for the S-100 bus, the 2830 also
featured the unique
Z-80 Mode 2 Interrupt Daisy Chain look-ahead scheme
which significantly reduced the ripple time for long daisy chains, alleviating
the need for wait states during Interrupt Acknowledge cycles. The base address
of the CTC and the three DARTs were hardware-selectable at any multiple of 16
between 0 and 255. The serial port interfaces, configured for DCE but easily
reconfigured for DTE, meet EIA RS-232-C specifications.
The manual for this board can be
obtained
here.
There is also an earlier board (2710).
Here is the manual for that board.
