c_fill.htm

mips架构的bootloader,99左右的版本 但源代码现在没人更新了

<title>The fill Command</title>
<h1>fill</h1>

<!--INDEX "fill command" "fill memory" -->

The fill command writes a hexadecimal pattern or string to a block of 
memory.<p>

</dl><h2>Format</h2><dl><dd>

The format for the fill command is:<p>

<pre>
fill from to {val|-s str}-
</pre>

where:<p>

<table><tr><td>
from	</td><td>is the base address for the fill operation.

</td></tr><tr><td>
to	</td><td>is the end address for the fill operation.

</td></tr><tr><td>
val	</td><td>is the hexadecimal value of the byte that is written to the area 
	to be filled.

</td></tr><tr><td>
-s str	</td><td>specifies that the memory block should be filled with an 
ASCII string rather than a particular value. String str is the 
ASCII string to be written to the memory block during the fill 
operation if the -s parameter is specified.
</td></tr></table><p>

</dl><h2>Functional Description</h2><dl><dd>

The fill command fills an area of memory with a specified hexadecimal 
pattern or repeating string. The pattern can be a single byte or multiple 
bytes. For the fill command to work correctly, to must be greater than 
from. If the -s option is specified, the next parameter is interpreted as an 
ASCII string. Multiple-word strings may be specified by enclosing them 
in quotes.<p>

For example, to clear an area of memory from 0xa0020000 to 0xa0021000, 
enter:<p>

<pre>
PMON> fill a0020000 a0021000 0
</pre>

To fill an area of memory from 0xa0020000 to 0xa00210000 with the 
string of values 0x41, 0x42, 0x43, 0x44, and 0x45, enter:<p>

<pre>
PMON> fill a0020000 a00210000 41 42 43 44 45 
</pre>

To fill an area of memory from 0xa0020000 to 0xa00210000 with the 
ASCII string "hello world," enter:<p>

<pre>
PMON> fill a0020000 a0021000 -s "hello world" 
</pre>

</dl><h2>Files</h2><dl><dd>
The fill command is located in <a href="../mon/fill.c">mon/fill.c</a>.

</dl><h2>See Also</h2><dl><dd>
<a href="c_m.htm">m command</a>.

</dl><p><hr>
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