Symbols - HP 10312D Operating Manual

Symbols
Analyzing the Intel 80286
1-14
The Symbol Table of the format specification menu is set up with
names to identify values of the status label (see figure 1-5).
Additional. labels have been defined
in
the format specification to make
triggering on specific 80286 cycles easier. Labels that may be of
interest are:
• The "SIZE" label which indicates the size of the transfer on the
DATA bus (byte or word transfer) and which byte of a byte
transfer
is
valid.
• The "HALT" label which differentiates between a halt cycle caused
by executing the HALT instruction and a shutdown cycle caused
by an execution while attempting to process a double fault
exception.
80286
- Symbol Table
C§I')
Symbol
Lebel
CillCJ
Bese letnery
I
view size
[JI]
~
INTERRUPT ACK
)()(000)()(0
HALT /SHUTDOWN
~ )()(010)()(0
MEMORY READ tet tern
)()(011)()(0
MEMORY HRITE
t • t tern XX010XX1
l/O READ
Pet tern
XX101XXO
I/O WRITE
Pet tern
XXlOOX~l
OPCODE F"ETCH
~
XX111XXO
Figure 1-5. Symbol Table for the 80286