參數(shù)資料
型號(hào): intel386 DX
廠商: Intel Corp.
英文描述: 32-Bit CHMOS Microprocessor With Integrated Memory Management(32位CHMOS 微處理器帶集成存儲(chǔ)管理)
中文描述: 32位CHMOS微處理器集成內(nèi)存管理(32位CHMOS微處理器帶集成存儲(chǔ)管理)
文件頁數(shù): 30/139頁
文件大小: 1587K
代理商: INTEL386 DX
Intel386
TM
DX MICROPROCESSOR
31
16 15
0
BREAKPOINT 0 LINEAR ADDRESS
DR0
BREAKPOINT 1 LINEAR ADDRESS
DR1
BREAKPOINT 2 LINEAR ADDRESS
DR2
BREAKPOINT 3 LINEAR ADDRESS
DR3
Intel reserved. Do not define.
Intel reserved. Do not define.
DR4
DR5
0
B B B0 0 0 0 0 0 0 0 0B B B B
DR6
3 2 1 0
LEN
3
R W
3 3
LEN
2
R W
2 2
LEN
1
R W
1 1
LEN
0
R W
0 0
0 0D
E E 3 3 2 2 1 1 0 0
DR7
31
16 15
0
NOTE:
0
indicates Intel reserved: Do not define; SEE SECTION 2.3.10
Figure 2-13. Debug Registers
tion breakpoints must have a length of 1 (LENi
e
00). Encoding of the LENi field is as follows:
Usage of Least
Significant Bits in
Breakpoint Address
Register i, (i
e
0
b
3)
All 32-bits used to
specify a single-byte
breakpoint field.
LENi
Breakpoint
Field Width
Encoding
00
1 byte
01
2 bytes
A1–A31 used to
specify a two-byte,
word-aligned
breakpoint field. A0 in
Breakpoint Address
Register is not used.
10
UndefinedD
do not use
this encoding
11
4 bytes
A2–A31 used to
specify a four-byte,
dword-aligned
breakpoint field. A0
and A1 in Breakpoint
Address Register are
not used.
The LENi field controls the size of breakpoint field i
by controlling whether all low-order linear address
bits in the breakpoint address register are used to
detect the breakpoint event. Therefore, all break-
point fields are aligned; 2-byte breakpoint fields be-
gin on Word boundaries, and 4-byte breakpoint
fields begin on Dword boundaries.
The following is an example of various size break-
point fields. Assume the breakpoint linear address in
DR2 is 00000005H. In that situation, the following
illustration indicates the region of the breakpoint
field for lengths of 1, 2, or 4 bytes.
DR2
e
00000005H;
31
LEN2
e
00B
0
00000008H
bkpt fld2
00000004H
00000000H
DR2
e
00000005H;
31
LEN2
e
01B
0
00000008H
w
bkpt fld2
x
00000004H
00000000H
DR2
e
00000005H;
31
LEN2
e
11B
0
00000008H
w
bkpt fld2
x
00000004H
00000000H
30
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