发明名称 |
Programmable controller with modular firmware for communication control |
摘要 |
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.
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申请公布号 |
US4079452(A) |
申请公布日期 |
1978.03.14 |
申请号 |
US19760696500 |
申请日期 |
1976.06.15 |
申请人 |
BUNKER RAMO CORPORATION |
发明人 |
LARSON, KENNETH NORMAN;SCARBROUGH, ALFRED DALE;KNUEVEN, JOHN BERNARD |
分类号 |
H04L29/04;G06F13/00;G06F13/12;G06F13/38;(IPC1-7):G06F3/04 |
主分类号 |
H04L29/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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