California Computer Systems -
2718 Serial IO Board
This was an extremely well designed
board. Very useful. Unfortunately I cannot locate a good image. If you have one
please let me know.
The CCS Model 2718 was a highly flexible
I/O interface board featuring two serial ports and two parallel ports, with full
handshaking for each port. Of the serial ports, one is asynchronous (a UART),
while the other can be programmed to be synchronous or asynchronous (a USART).
Both provide considerable format selectability, the UART through hardware, the
USART through software. The interface for each serial port conformed to the EIA
RS-232-C specifications, while each parallel port included a full four-line
handshaking scheme, with jumpers allowing selection of the sense polarity of the
individual lines. The base addresses of the serial ports, the parallel ports,
and an optional (user-supplied) 2K ROM were jumper-selectable.
The well written manual for this board
can be obtained
The schematic for the board can be
Other California Computer
Systems S-100 Boards
2065 64K RAM
2066 64K RAM
Serial & Parallel
This page was last modified