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Solid State Music - IO5 Boards
The company was clearly an extension of their earlier IO4 board.   Since it was a late production board by the company it was IEEE-696 compatible. 
Unfortunately the board is quite rare.


The IO5 serial and parallel l/O card provided an extremely flexible interfacing for an S-100 IEEE696 system. Two serial and 3 parallel input/output
ports supported a wide variety of devices such as:-


Serial and parallel printers
Card readers

Multiple boards could be used to support systems requiring a large number of peripherals for a wide variety of multi-user applications:--

Special purpose business applications (word processing, hotel management, banking terminals, training systems)
Real-time control systems (engraving, machine tools, robotics, energy management)
Data collection (quality control, laboratory data acquisition, communications message switching)
Add--in/upgrading of current S-1O0 systems (Northstar, Dynabyte, Cromemco, Ithaca)

Baud rates were individually selectable from 110 to 19,200 baud. Each serial interface was accessible from the bus as 110 in a status/data port pair.
Serial interfaces can be set through software for:-

5 to 8 data bits

1 or 2 stop bits
parity enable
parity even or odd
sending a break character
control the RTS and DTR

Seven standard signals were provided on an RS-232 connector for each serial interface:-

TD    (Transmit Data)
RD    (Receive Data)
RTS   (Request-To-Send)
CTS   (Clear-To-Send)
DTR   (Data Terminal Ready)
DSR   (Data Set Ready)
SG    (Signal Ground)

A 6821B PIA provided two 8-bit bidirectional parallel I/O ports. The 26 pin connector, J3, could be two 8-bit I/O ports or one 16-bit I/O port. Each of the
peripheral data lines could be individually programmed as an input or output. Each of the four control/interrupt lines could be programmed for one of several
control modes. These features allow a high degree of flexibility:-

Two 8-bit bidirectional I/O ports
Two programmable control registers
Two programmable data direction registers

Four individually controlled interrupt lines
Program-controlled interrupt and interrupt disable capability

An optional cable assembly was available for terminal printer or modem interfacing.

The manual for this board can be obtained here.

Other Solid State Music S-100 Boards
8K RAM    VB1B   8080 CPU   Z80 CPU    EPROM   IO4    PB1    VB3    IO5   16K RAM    16K (MB10) RAM


This page was last modified on 05/11/2020