forked from NJU-ProjectN/i386-manual
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathSTR.htm
68 lines (49 loc) · 1.62 KB
/
STR.htm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<HTML>
<HEAD>
<TITLE>80386 Programmer's Reference Manual -- Opcode STR</TITLE>
</HEAD>
<BODY STYLE="width:80ch">
<B>up:</B> <A HREF="c17.htm">
Chapter 17 -- 80386 Instruction Set</A><BR>
<B>prev:</B><A HREF="STOS.htm"> STOS/STOSB/STOSW/STOSD Store String Data</A><BR>
<B>next:</B><A HREF="SUB.htm"> SUB Integer Subtraction</A>
<P>
<HR>
<P>
<H1>STR -- Store Task Register</H1>
<PRE>
Opcode Instruction Clocks Description
0F 00 /1 STR r/m16 pm=23/27 Load EA word into task register
</PRE>
<H2>Operation</H2>
<PRE>
r/m := task register;
</PRE>
<H2>Description</H2>
The contents of the task register are copied to the two-byte register or
memory location indicated by the effective address operand.
<P>
STR is used only in operating system software. It is not used in application
programs.
<H2>Flags Affected</H2>
None
<H2>Protected Mode Exceptions</H2>
#GP(0) if the result is in a nonwritable segment; #GP(0) for an illegal
memory operand effective address in the CS, DS, ES, FS, or GS segments;
#SS(0) for an illegal address in the SS segment; #PF(fault-code) for a page
fault
<H2>Real Address Mode Exceptions</H2>
Interrupt 6; STR is not recognized in Real Address Mode
<H2>Virtual 8086 Mode Exceptions</H2>
Same exceptions as in Real Address Mode
<H2>Notes</H2>
The operand-size attribute has no effect on this instruction.
<P>
<HR>
<P>
<B>up:</B> <A HREF="c17.htm">
Chapter 17 -- 80386 Instruction Set</A><BR>
<B>prev:</B><A HREF="STOS.htm"> STOS/STOSB/STOSW/STOSD Store String Data</A><BR>
<B>next:</B><A HREF="SUB.htm"> SUB Integer Subtraction</A>
</BODY>