233 lines
13 KiB
HTML
233 lines
13 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>Int 31/AX=FF24h
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</TITLE>
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<META NAME="Description" CONTENT="
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Int 31/AX=FF24h - CauseWay - ExecOverlay - LOAD AND OPTIONALLY EXECUTE APP CODE -
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AX = FF24h
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EBX = flags
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bit 0: don't execute (overlay only)
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bit 1: don't preserve relocation information
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ES:EDX - filename (see also #03163)
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FS:ESI - commandline (ESI = 00000000h if no commandline)
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GS:EDI - name (CW's /o option)
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Return: CF clear if successful
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---EBX bit 0 set---
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CX:EDX = program entry point (CS:EIP)
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">
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</HEAD>
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<BODY BGCOLOR="#FFD0A0">
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<center>
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<h2>Int 31/AX=FF24h
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</h2>
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</center><p>
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<td>
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<td><a href="alpha.htm" tppabs="http://www.ctyme.com/intr/alpha.htm">Contents</a></td>
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</td></table><p>
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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>CauseWay - ExecOverlay - LOAD AND OPTIONALLY EXECUTE APP CODE</font></h3>
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<PRE>
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AX = FF24h
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EBX = flags
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<p><b>bit 0:</b><br>Don't execute (overlay only)
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<p><b>bit 1:</b><br>Don't preserve relocation information.
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ES:EDX -> filename (see also #03163).
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FS:ESI -> commandline (ESI = 00000000h if no commandline).
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GS:EDI -> name (CW's /o option)<br>
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<p><b>Return:</b><br>CF clear if successful
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---EBX bit 0 set---
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CX:EDX = program entry point (CS:EIP)
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SI = segment of PSP
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---EBX bit 1 set---
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BX:EAX = initial SS:ESP
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EDI high word = base segment
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EDI low word = number of segments
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EBP = start of segment definitions
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CF set on error
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AX = error code
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0001h DOS file access error
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0002h not a CuaseWay 3P file
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0003h not enough memory
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</PRE>
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<p><b>See Also:</b>
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<a href="rb-5933.htm" tppabs="http://www.ctyme.com/intr/rb-5933.htm">AX=FF2Ah</a> - <a href="rb-2939.htm" tppabs="http://www.ctyme.com/intr/rb-2939.htm">INT 21/AH=4Bh</a>
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<PRE>
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<p>
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Format of CauseWay executable:
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<a name=table3163></a>
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Offset Size Description (Table 03163)
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00h 2 BYTEs signature "3P"
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02h DWORD size of header data in bytes
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06h DWORD size of EXE image data in bytes
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0Ah DWORD number of bytes of program memory required
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0Eh WORD number of segment definitions <a href="rb-5927.htm#Table3165" tppabs="http://www.ctyme.com/intr/rb-5927.htm#Table3165">(see #03165)</a>
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10h DWORD number of relocation table entries
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14h DWORD offset of program entry point
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18h WORD segment list entry number for entry point's CS
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1Ah DWORD initial ESP
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1Eh WORD segment list entry number for initial SS
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20h DWORD control flags <a href="rb-5927.htm#Table3164" tppabs="http://www.ctyme.com/intr/rb-5927.htm#Table3164">(see #03164)</a>
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24h DWORD automatic stack size in bytes if ESP entry = 00000000h
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28h BYTE length of name (name follows program image)
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29h 23 BYTEs reserved
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</PRE>
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<p><b>See Also:</b>
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#01594 - #01609 at INT 21/AH=4Bh
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<PRE>
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<p>
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Bitfields for CauseWay executable control flags:
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<a name=table3164></a>
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Bit(s) Description (Table 03164)
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0 16-bit interrupt stack frame
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7 descriptor table type (0 = GDT, 1 = LDT)
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14 16-bit default data size
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31 compressed EXE image
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</PRE>
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<p><b>Note:</b>
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Bits 0 and 14 should always be equal
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<p><b>See Also:</b>
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#03163
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<PRE>
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<p>
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Format of CauseWay segment definition [array]:
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<a name=table3165></a>
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Offset Size Description (Table 03165)
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00h DWORD start offset within program image
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04h DWORD length and type
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<p><b>bits 0-19:</b><br>Length
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<p><b>bit 20:</b><br>Granularity (if set, length is in 4K pages)
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<p><b>bits 21-24:</b><br>Type
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0000 code
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0001 read/write data
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0010 stack
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0011 read-only data
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<p><b>bit 25:</b><br>Force segment descriptor's D bit to 0
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<p><b>bit 26:</b><br>Force segmetn descriptor's D bit to 1
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</PRE>
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<p><b>See Also:</b>
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#03163
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<p>
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<b>Category: <a href="cat-009.htm" tppabs="http://www.ctyme.com/intr/cat-009.htm">
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DOS Extenders</a>
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- <a href="int-31.htm" tppabs="http://www.ctyme.com/intr/int-31.htm">
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Int 31h</a>
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- <a href="alpha-c.htm" tppabs="http://www.ctyme.com/intr/alpha-c.htm">
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C</a>
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<td><a href="int.htm" tppabs="http://www.ctyme.com/intr/int.htm">Interrups</a></td>
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<td><a href="cat.htm" tppabs="http://www.ctyme.com/intr/cat.htm">Categories</a></td>
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<td><a href="alpha.htm" tppabs="http://www.ctyme.com/intr/alpha.htm">Contents</a></td>
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</td></table><p>
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<INPUT TYPE="hidden" NAME="business" VALUE="marc@perkel.com">
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