230 lines
13 KiB
HTML
230 lines
13 KiB
HTML
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<TITLE>Int 21/AX=4402h
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<META NAME="Description" CONTENT="
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Int 21/AX=4402h - HIGHUMM.SYS v1.17+ - IOCTL - GET API ADDRESS -
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AX = 4402h
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BX = handle for device KSP$UMM
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CX = 0004h
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DS:DX - DWORD to hold entry point (see #01446)
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Return: CF set on error
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AX = error code (see #01680 at AH=59h/BX=0000h)
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CF clear if successful
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AX = number of bytes read
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Program: HIGHUMM.SYS is part of the shareware The Last Byte memory
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management package by Key Software Products
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">
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<h2>Int 21/AX=4402h
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</h2>
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<p><img src="rbline.gif" tppabs="http://graphics.ctyme.com/gif/rbline.gif" width="100%" alt="------"><p>
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<h3><font color=#C00040>HIGHUMM.SYS v1.17+ - IOCTL - GET API ADDRESS</font></h3>
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<PRE>
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AX = 4402h
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BX = handle for device "KSP$UMM"
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CX = 0004h
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DS:DX -> DWORD to hold entry point <a href="rb-2827.htm#Table1446" tppabs="http://www.ctyme.com/intr/rb-2827.htm#Table1446">(see #01446)</a><br>
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<p><b>Return:</b><br>CF set on error
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AX = error code <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)
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CF clear if successful
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AX = number of bytes read
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</PRE>
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<p><b>Program:</b>
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HIGHUMM.SYS is part of the shareware "The Last Byte" memory
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management package by Key Software Products
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<p><b>See Also:</b>
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<a href="rb-2826.htm" tppabs="http://www.ctyme.com/intr/rb-2826.htm">AX=4402h"LASTBYTE"</a>
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<PRE>
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<p>
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<a name=table1446></a>
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(Table 01446)
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Call HIGHUMM.SYS entry point with:.
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AH = 00h allocate UMB (same as XMS function 10h) (see INT 2F/AX=4310h)
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DX = size in paragraphs
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<p><b>Return:</b><br>BX = segment number (if successful)
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DX = size of requested block/size of largest block.
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AH = 01h deallocate UMB (same as XMS func 11h) (see INT 2F/AX=4310h)
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DX = segment number of UMB.
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AH = 02h request a bank-switched memory block
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DX = size in paragraphs
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<p><b>Return:</b><br>BX = segment number (if successful)
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DX = size of requested block/size of largest block.
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AH = 03h release a bank-switched memory block
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DX = segment number.
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AH = 04h transfer data to/from high memory
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DS:SI -> source
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ES:DI -> destination
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CX = length in bytes
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</PRE>
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<p><b>Note:</b>
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Enables bank-switched memory, does the copy, then disables
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bank-switched memory.
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AH = 05h get a word from bank-switched memory
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ES:DI -> word to read
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<PRE>
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<p><b>Return:</b><br>DX = word.
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AH = 06h put a word to bank-switched memory
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ES:DI -> word to write
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DX = word.
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AH = 07h put a byte to bank-switched memory
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ES:DI -> byte to write
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DL = byte.
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AH = 08h enable bank-switched memory
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DS:SI -> 6-byte status save area.
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AH = 09h disable bank-switched memory
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DS:SI -> 6-byte save area from enable call (AH=08h).
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AH = 0Ah assign name to UMB or high bank-switched block
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DX = segment number
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DS:SI -> 8-byte blank-padded name.
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AH = 0Bh locate UMB block by name
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DS:SI -> 8-byte blank-padded name
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<p><b>Return:</b><br>BX = segment number (if successful)
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DX = size of block.
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AH = 0Ch locate bank-switched block by name
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DS:SI -> 8-byte blank-padded name
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<p><b>Return:</b><br>BX = segment number (if successful)
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DX = size of block<br>
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<p><b>Return:</b><br>AX = status code
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0001h successful
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0000h failed
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BL = error code
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80h not implemented
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B0h insufficient memory, smaller block available
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B1h insufficient memory, no blocks available
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B2h invalid segment number
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</PRE>
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<p><b>Note:</b>
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Only functions 00h and 01h are always available; the remaining
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functions are only enabled if the proper commandline switch is given
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<p>
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<b>Category: <a href="cat-024.htm" tppabs="http://www.ctyme.com/intr/cat-024.htm">
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Memory Management</a>
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- <a href="int-21.htm" tppabs="http://www.ctyme.com/intr/int-21.htm">
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Int 21h</a>
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- <a href="alpha-h.htm" tppabs="http://www.ctyme.com/intr/alpha-h.htm">
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H</a>
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