Programmable controller with modular firmware for communication

Details Programmable controller with modular firmware for communication Programmable controller with modular firmware for communication

1976-06-15

1978-03-14

Nusbaum, Mark E.

Boots, shoes, and leggings

364900, G06F 304

Patent

active

040794520

ABSTRACT:
A programmable controller module (PCM) for operably coupling a plurality of peripheral devices (PDs) of various communication disciplines to a data processor (DP) or to remote PCMs through a serial interface adapter (SIA) or parallel interface adapter (PIA). The PCM is comprised of a special purpose computer having a program of subroutines arranged in memory modules which define and implement specific communication protocols (routines) for different communication disciplines. Each PD connected to a PCM by an SIA or PIA is assigned a channel code and is addressed by channel code. A discipline identification (DID) line is connected from each adapter channel to one of a predetermined number of terminals in the PCM. There is one terminal for each communication discipline for which there is stored in a memory module an appropriate protocol. Each channel has its DID line connected to the appropriate terminal according to the communication discipline of the PD connected to it. When a channel is addressed, its DID is activated. The PCM then scans the terminals to determine which is activated to ascertain the discipline of the device.

REFERENCES:
patent: 3409880 (1968-11-01), Galler et al.
patent: 3810105 (1974-05-01), England
patent: 3820079 (1974-06-01), Bergh et al.
patent: 3828325 (1974-08-01), Stafford et al.
patent: 3842405 (1974-10-01), Key et al.

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