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1
The HCS12 / 9S12: An Introduction to Software and Hardware ...
The contents of the condition code register are shown in Figure 2.8. The shaded
characters are condition flags that reflect the status of an operation. The
meanings of these condition flags are as follows: S X I 7 6 5 4 3 2 1 0 H N Z V C
Figure ...
4.3.3.1 Condition-Code Registers The condition-code register is 32 bits wide, but
it is actually a collection of eight 4-bit registers (named CR0, CR1, ..., CR7) that
hold the status of a previous computation (e.g., the result of a comparison).
3
Introduction to Microcontrollers: Architecture, Programming, ...
... implemented by combinations of other move instructions. Because there is no
instruction to “load” the condition code register, it can be loaded through
accumulator A or B with the TFR instruction. For example, to put 3 into the
condition code, ...
4
Practical Embedded Controllers: Design and Troubleshooting ...
It is said that the difference between the amateur and professional assembly
language programmer is that the professional programmer pushes the use of the
condition code register to its limits. The 8-bit condition code register is a function
of ...
5
A Practical Introduction to Hardware/Software Codesign
Table 6.3 Effect of the micro-instruction register and condition-code register on
conditional jump instructions Cycle CSAR Micro-instruction register N 3 N+1 4
CSTORE(3) = TEST R0 sets Z-flag N+2 5 CSTORE(4) = JZ 10 N+3 10 CSTORE(5
) ...
6
Thesaurus of Claim Construction
Patentee: A unit used to access a condition code register. Infringer: Component
that determines whether the condition code value is fetched or delivered based
on an instruction field. Condition code register A specialpurpose registerfor ...
Robert C. Kahrl, Stuart B. Soffer, Stuart Soffer,
2010
7
Microprocessor 8085 and Its Interfacing
Condition code register The condition code register is nothing but the flag
register of MC 6800. The condition code register indicates the results of an
arithmetic logic unit operation. The bit pattern of condition code register is shown
in Figure ...
8
Exploitation of Fine-Grain Parallelism
The compare operations write to the condition-code register of the PE they are
executed on. • The main features of VLJW machines can only become evident if
several conditional branch operations can be processed in parallel. The branch ...
9
Single and Multi-Chip Microcontroller Interfacing: For the ...
TAB moves the contents of accumulator A to accumulator B without changing A.
Similarly TBA moves B to A, TAP moves A to the condition code register, and TPA
moves the condition code register to A. TSX moves SP to X, TXS moves X to SP,
...
10
Principles of Computer Hardware
CCR ALU f(A,B) Condition code register The word in the CCR indicates whether
the last operation gave a zero or a negative result or whether a carry was
generated Figure 7.3 Information paths in the CPU and conditional instructions.