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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.

CCS-Parallel-Serial Board-2

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 manual for this board is currently unavailable.  If you would like to donate a copy please let me know.
The schematic for the board can be obtained here

It looks like the was a later upgrade of this board called the CCS  2718A.  Here is a picture of that board.  I is quite a different board.

  CCS 2718A Board

The well written manual for this board can be obtained here.

Other California Computer Systems  S-100 Boards

16K RAM   2065 64K RAM    2066 64K RAM   FDC   Z80 CPU   SIO   Serial & Parallel   Other Boards


This page was last modified on 07/30/2018