Industrial Micro Systems - 4 Line Communications
The Industrial Micro Systems Model 480 four
line Asynchronous Communication Controller (ACC) interfaced four RS-232C
line to the Series 5000 and 8000 IMS Systems.
The 480 unfortunately required 32 I/O address to
transfer control and data information between the 480 Controller and CPU.
Control is accomplished by the Western Digital WD8250 Asynchronous
Communication Element (ACE). The Model 480
controller requires one slot in the S-100 bus.
Each serial port is brought to a 3M 26 pin header.
The RS-232-C ports are designed as Data Terminal Equipment (DTE) to
connect directly to modems. To
connect to terminals the RS-232 cable wires must be scrambled for Terminal
to Terminal connection.
The manual for this board can be
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