May 2024
Intermediate to advanced
665 pages
23h 2m
English
book
The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
by Lyla B. Das
Content preview from The X86 Microprocessors: Architecture and Programming (8086 to Pentium), 1st Edition
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310 THE x86 MICROPROCESSORS
9.6 | Mode 2 (Strobed Bidirectional Bus I/O)
is functional confi guration provides a means for communicating with a peripheral device or
structure on a single 8-bit bus for both transmitting and receiving data (bidirectional bus I/O).
‘Handshaking’ signals are provided to maintain proper bus fl ow discipline in a similar manner
to Mode 1. Interrupt generation and enable/disable functions are also available.
Mode 2 Basic Functional Defi nitions:
Used in Group A only.i)
One 8-bit, bi-directional bus port (Port A) and a 5-bit control port (Port C).ii)
Both inputs and outputs are latched.iii)
e 5-bit control port (P
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