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Int 21/AX=4405h - COMBI-disk v1.13 - CONTROL COMBI-disk -
AX = 4405h
BL = drive number (00h = default, 01h = A:, etc) for RAM disk
CX = number of bytes to write
DS:DX - buffer containing command packet (see #01539)
Return: CF clear if successful
AX = number of bytes actually transferred
CF set on error
AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
SeeAlso: AX=4404hCOMBI
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<h2>Int 21/AX=4405h
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<h3><font color=#C00040>COMBI-disk v1.13 - CONTROL COMBI-disk</font></h3>
<PRE>
AX = 4405h
BL = drive number (00h = default, 01h = A:, etc) for RAM disk
CX = number of bytes to write
DS:DX -> buffer containing command packet <a href="rb-2885.htm#Table1539" tppabs="http://www.ctyme.com/intr/rb-2885.htm#Table1539">(see #01539)</a><br>
<p><b>Return:</b><br>CF clear if successful
AX = number of bytes actually transferred
CF set on error
AX = error code (01h,05h,06h,0Dh) <a href="javascript:if(confirm('http://www.ctyme.com/intr/rb-0000.htm \n\nThis file was not retrieved by Teleport Pro, because it was unavailable, or its retrieval was aborted, or the project was stopped too soon. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/intr/rb-0000.htm#Table0'" tppabs="http://www.ctyme.com/intr/rb-0000.htm#Table0"></a>(see #01680 at AH=59h/BX=0000h)
</PRE>
<p><b>See Also:</b>
<a href="rb-2879.htm" tppabs="http://www.ctyme.com/intr/rb-2879.htm">AX=4404h"COMBI"</a>
<PRE>
<p>
<a name=table1538></a>
(Table 01538)
Values for COMBI-disk command code:
80h flush cache
81h change options byte
82h shrink memory
83h expand memory
84h get dirty block information
85h reset write errors
86h reset counters
<p>
Format of COMBI-disk command packet:
<a name=table1539></a>
Offset Size Description (Table 01539)
00h WORD version
02h BYTE command code <a href="rb-2885.htm#Table1538" tppabs="http://www.ctyme.com/intr/rb-2885.htm#Table1538">(see #01538)</a>
---command code 80h---
no additional fields
---command code 81h---
03h BYTE new options byte <a href="rb-2885.htm#Table1540" tppabs="http://www.ctyme.com/intr/rb-2885.htm#Table1540">(see #01540)</a>
---command code 82h---
03h WORD number of KB to release
---command code 83h---
03h WORD number of KB to expand
---command code 84h---
03h DWORD -> buffer for block info <a href="rb-2885.htm#Table1541" tppabs="http://www.ctyme.com/intr/rb-2885.htm#Table1541">(see #01541)</a>
---command code 85h---
03h DWORD block ID
---command code 86h---
03h BYTE which counters to reset
<p><b>bit 0:</b><br>Hard disk read counts
<p><b>bit 1:</b><br>Hard disk write counts
<p><b>bit 2:</b><br>RAM disk read/write counts
</PRE>
<p><b>Note:</b>
Multiple commands may be placed in a single packet by stringing
together as many command/argument pairs as desired
<PRE>
<p>
Bitfields for COMBI-disk options byte:
<a name=table1540></a>
Bit(s) Description (Table 01540)
0 cache off
1 cache frozen
2 write caching enabled
3 delayed writing disabled
5 fix memory allocation (no XMS lending)
6 no 'sector not found' error
<p>
Format of COMBI-disk block info:
<a name=table1541></a>
Offset Size Description (Table 01541)
00h DWORD block ID
04h BYTE bitmask of valid sectors in block
05h BYTE bitmask of dirty sectors in block
06h BYTE last error returned by BIOS
07h BYTE number of errors
</PRE>
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<b>Category: <a href="cat-008.htm" tppabs="http://www.ctyme.com/intr/cat-008.htm">
Disk I/O Enhancements</a>
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Int 21h</a>
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