📄 2006-6-10☆[+3]出现了个错误error l121 improper fixup请高手指点.htm
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<P align=center><STRONG>[+3]出现了个错误error L121 IMPROPER
FIXUP请高手指点</STRONG></P></TD></TR></TBODY></TABLE><BR><FONT color=#ff0000>帖子编号：
30404/776766, 发表用户:</FONT><A
href="http://www.daxia.com/bbs/moreinfo.asp?id=63964" target=_blank>51er</A>
<FONT color=#ff0000>发表时间:2005-12-23
11:42:10 访问次数:95 发贴IP:61.149.194.2
</FONT><BR></TD><BR>文章内容: <PRE class=font>请高手帮帮忙，这是什么原因，怎么解决 谢谢<BR><BR>相关帖子>>>：<BR><UL><LI><IMG src="2006-6-10☆[+3]出现了个错误error L121 IMPROPER FIXUP请高手指点.files/note.gif"><B>去看l121错误分析。(0字)zz123[8次]2005-12-23 12:07:40</B><BR><UL><LI><IMG src="2006-6-10☆[+3]出现了个错误error L121 IMPROPER FIXUP请高手指点.files/more.gif"><B>自己先看看(2018字)zz123[18次]2005-12-23 12:09:02</B><BR>L121
IMPROPER FIXUP:
After evaluation of absolute fixups, an address is not accessible. The improper address along with
the specific module name, partial segment, and segment address are displayed. The fixup command is
not processed.
Linker Output:
MODULE: filename (modulename)
SEGMENT: segment-name
OFFSET: segment-address
Symptoms:
In a C source file I have declared a pdata variable called foo. I wish to access this variable in
an assembly module, and I have written the following code to do this:
EXTRN XDATA (foo)
...
MOV R0, #foo
MOV @R0, A
Cause:
This is because when using the EXTRN directive you have specified the variable as xdata. This is
correct since pdata variables are stored in xdata, however the assembler assigns a 16-bit address
to the variable, but only an 8-bit address exists for the pdata variable.
Resotution:
Move the lower byte of the 16-bit address of the variable into R0. The upper byte will be present
on P2 during the memory access.
Example
MOV R0, #LOW (foo)
<UL><LI><IMG src="2006-6-10☆[+3]出现了个错误error L121 IMPROPER FIXUP请高手指点.files/62.gif"><B>珍视白辛苦，楼主看不堪呀！(0字)zz123[5次]2005-12-23 12:32:09</B><BR></LI></UL></LI></UL></LI></UL></PRE>
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