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RCA Manuals
Computer Hardware
70/700 Series
Reference manual
RCA 70/700 Series Reference Manual
Spectra 70 communication controller-multichannel (ccm) communication buffers
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Contents
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Table of Contents
Table of Contents
General Description
Communication Controller- Multichannel
Buffer Scan
CCM Device Addresses
Coordination Message Line (CML)
Operational Characteristics
Operational Words (Ows)
Processor-CCM Control
Command Codes 0
Table 1-2. Processor Command Codes
Table 1-3. Write Control Bytes
Data Transfer
Channel Coordination
Figure 1-2. Generation of OW Address
Service Requests
Processor Scan
To Buffer
Asynchronous Data Transfer from Processor to Buffer
Data Accuracy Control
Code Modification
Data Timeout
Detection of Pause and Break
Program Notification
Interrupts
Coordination Messages (CM)
CCM Initiated
Processor Initiated
Initialization
CCM Memory Readout
CCM Initialization Considerations
Figure 2-1. Loading of Line Status Words
Delete Characters as Ows
OW Construction Example Number 1 (83-B-X)
Reference Information
Standard Device Byte
Table 3-1. Standard Device Byte
Conditions Requiring Access of Standard Device Byte
Sequential Modification of USASCII to Extended USASCII
Table 3-2. Conditions Requiring Access of Standard Device Byte
Sequential Modification of IBM 1050 Code
Transmission
Sequential Modification of Teletypewriter Baudot Code Transmission
System Functional Capability
Schematic Appearance of CCM Memory Layout
Table 3-3. Remote System Functional Capability
Figure 3-1. Schematic Appearance of CCM Memory Layout
Line Status Words Layout
Table 3-4. Line Status Words (LSW)
Table 3-5. Operational Words
Communication Reporting Byte
Table 3-6. Operational Words OW-2
Buffer Capacity
Physical Characteristics
Buffer Identification
Controls and Indicators
Features
Communication Buffers
CCM - Buffer Sequence
Select
Buffer Responses
CCM Responses
Reports
Causes of MR, ER, and LDR Reports
Data Set, ACU, and VRU Signal Reference List
Data Set to Buffer
Buffer to Data Set
Automatic Calling Unit to Special Feature
Special Feature to Automatic Calling Unit
Voice Response Unit to Parallel Buffer
70/710 Telegraph Buffer
Table 4-1. Model 70/710 Remote Device Characteristics
70/715 Parallel Buffer
Figure 4-1. Parallel Buffer Data Flow
70/720 Asynchronous Data Set Buffer
70/721 Synchronous Data Set Buffer
70/722 Synchronous Transmitter-Receiver Buffer
70/724 EDGE Demodulator/Buffer
70/725 Data Gathering System Buffer
70/780 Time Generator/Buffer
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SPEC I RA. 7u
70/668 eeM AND 70/700 SERIES BUFFERS
Com m u n ication Controller-
Multichannel (CCM)
Communication Buffers
Reference Manual
OO(]3LJ[]
Information
Systems
70-06-668
June 1968
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