202 lines
12 KiB
HTML
202 lines
12 KiB
HTML
<HTML>
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<TITLE>Int 2F/AX=4A10h/BX=0000h
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</TITLE>
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<META NAME="Description" CONTENT="
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Int 2F/AX=4A10h/BX=0000h - Novell NWCACHE - INSTALLATION CHECK AND STATISTICS -
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AX = 4A10h
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BX = 0000h
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CX = magic value
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0EDCh flush delayed writes
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('EDC' = Novell European Development Center)
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other (use EBABh to avoid SMARTDRV/DBLSPACE interaction)
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Return: (also refer to notes below)
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AX = 6756h ('gV') if installed
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CF clear
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BX = cache memory type
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">
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<center>
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<h2>Int 2F/AX=4A10h/BX=0000h
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</h2>
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<p><img src="rbline.gif" tppabs="http://graphics.ctyme.com/gif/rbline.gif" width="100%" alt="------"><p>
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<h3><font color=#C00040>Novell NWCACHE - INSTALLATION CHECK AND STATISTICS</font></h3>
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<PRE>
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AX = 4A10h
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BX = 0000h
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CX = magic value
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0EDCh flush delayed writes
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('EDC' = Novell European Development Center)
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other (use EBABh to avoid SMARTDRV/DBLSPACE interaction)<br>
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<p><b>Return:</b><br>(also refer to notes below)
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AX = 6756h ('gV') if installed
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CF clear
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BX = cache memory type
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01h conventional memory
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02h extended memory
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03h EMS
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DI:SI = cache misses
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CX:DX = segment:offset address of data area containing statistics
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<a href="rb-4823.htm#Table4095" tppabs="http://www.ctyme.com/intr/rb-4823.htm#Table4095">(see #04095)</a>
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BP = version in BCD
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0100h = 1.00
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0101h = 1.01 & 1.02 (!)
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</PRE>
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<p><b>Notes:</b>
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SMARTDRV 4.0+ uses a similar installation check on this function but
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returns different data. To ensure proper interpretation of
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the returned values, the caller must check the returned magic
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value in AX. Since SMARTDRV may also alter DI:SI (and possibly
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DS), the caller should take care of this, too..
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The Novell DOS / DR-DOS 7.x COMMAND.COM invokes this function with
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CX=0EDCh, which causes NWCACHE to flush any delayed writes before
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returning the normal register values if it is configured to flush
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writes before returning to the DOS prompt (/FLUSH:ON); however, if
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/FLUSH:OFF, this function becomes a NOP with CX=0EDCh..
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Note that for this function the 0EDCh special case may vanish with
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future issues of NWCACHE (2.0+), and the function would then always
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do the normal install check, and not flush the cache.
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<p><b>See Also:</b>
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<a href="rb-4823.htm" tppabs="http://www.ctyme.com/intr/rb-4823.htm">AX=4A10h/BX=0001h"NWCACHE"</a>
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<PRE>
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<p>
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Format of NWCACHE statistics:
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<a name=table4095></a>
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Offset Size Description (Table 04095)
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00h DWORD number of read requests
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04h DWORD number of reads performed
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08h DWORD number of write requests
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0Ch DWORD number of writes performed
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10h WORD number of disk errors
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12h WORD number of cache memory errors
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</PRE>
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<p>
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<b>Category: <a href="cat-004.htm" tppabs="http://www.ctyme.com/intr/cat-004.htm">
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Caches/Spoolers</a>
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- <a href="int-2f-1.htm" tppabs="http://www.ctyme.com/intr/int-2F.htm">
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Int 2Fh</a>
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N</a>
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<td><a href="alpha.htm" tppabs="http://www.ctyme.com/intr/alpha.htm">Contents</a></td>
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