Figure 127. data concentrator – Zilog Z08470 User Manual
Page 324
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Serial Input/Output
304
Figure 127. Data Concentrator
Keyboard
Display/
Line
Printer
Z80
Terminal
Bus
Terminal Interfaces
To Remote
High-Speed
Modem
System
Z80
Z80
RDY
RDY
Ch.A
Z80
System Bus
(Data, Address, and Control)
RxCA
TxCA
Z80
CPU
and
Memory
Intelligent
Terminal
SIO Clock
Generator
and
Time Out
Counters
Terminal Interfaces
Processor
Memory
CPU
Receivers
Drivers/
RS 232
Receivers
Drivers/
RS 232
Receivers
Drivers/
RS 232
Console
SIO
Z80
PIO
Z80
CTC
Receivers
Drivers/
RS 232
Receivers
Drivers/
RS 232
SIO #2
Ch.B
DMA
Ch.A
Z80
SIO #1
Ch.B
Communications Link
(SDLC Protocol)