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<TITLE>Int 10/AX=4F14h
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Int 10/AX=4F14h - VESA OEM Extensions - Matrox Millenium (BIOS v2.1) -
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AX = 4F14h
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BL = function
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00h installation check / get capabilities
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ES:DI - 256-byte buffer for Matrox-specific information
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(see #00125)
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Return: ES:DI buffer filled
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01h read/write MGA indexed data register
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BH = direction (00h = write, else read)
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CL = register number (80h for most-recently used register)
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CH = new value, if writing
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<h2>Int 10/AX=4F14h
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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>VESA OEM Extensions - Matrox Millenium (BIOS v2.1)</font></h3>
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<PRE>
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AX = 4F14h
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BL = function
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00h installation check / get capabilities
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ES:DI -> 256-byte buffer for Matrox-specific information
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<a href="rb-0306.htm#Table125" tppabs="http://www.ctyme.com/intr/rb-0306.htm#Table125">(see #00125)</a>
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<p><b>Return:</b><br>ES:DI buffer filled
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01h read/write MGA indexed data register
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BH = direction (00h = write, else read)
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CL = register number (80h for most-recently used register)
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CH = new value, if writing
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<p><b>Return:</b><br>CH = current value, if reading
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02h read/write register in MGA control space
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BH = direction and size
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<p><b>bit 4:</b><br>Read register instead of writing
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<p><b>bits 1-0:</b><br>Data size (00 = BYTE, 01 = WORD, 10 = DWORD)
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SI = register address
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CL/CX/ECX = new value if writing
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<p><b>Return:</b><br>CL/CX/ECX = current value if reading
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03h read PINS byte
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SI = offset of byte within PINS data <a href="rb-0306.htm#Table126" tppabs="http://www.ctyme.com/intr/rb-0306.htm#Table126">(see #00126)</a>
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<p><b>Return:</b><br>CL = value of specified PINS byte
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04h ??? (related to PLL programming)
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DX = ???
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<p><b>Return:</b><br>CL,EDX destroyed
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05h read BIOS byte
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SI = offset of byte relative to start of BIOS image
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<p><b>Return:</b><br>CL = specified byte
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else
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<p><b>Return:</b><br>AX = FFFFh<br>
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<p><b>Return:</b><br>AL = 4Fh if function supported
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AH = status
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00h successful
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01h failed
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</PRE>
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<p><b>Note:</b>
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Most of this info is from http:\\grafi.ii.pw.edu.pl\gbm\matrox
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<p><b>See Also:</b>
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<a href="rb-0306.htm" tppabs="http://www.ctyme.com/intr/rb-0306.htm">MEM C000h:7FFCh"Matrox"</a>
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<PRE>
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<p>
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Format of Matrox-specific VESA extensions information:
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<a name=table125></a>
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Offset Size Description (Table 00125)
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00h 7 BYTEs signature "VBE/MGA"
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07h 10 BYTEs ??? (01h 01h 00h 00h 00h 00h 00h 00h 00h 07h)
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11h WORD BIOS version (high byte = major, low byte = one-digit minor)
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13h DWORD -> manufacturer name (ASCIZ "Matrox")
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17h DWORD -> ASCIZ card name
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1Bh DWORD -> ??? ASCIZ string (empty string on card examined)
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1Fh DWORD -> ASCIZ vendor name
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23h DWORD -> ASCIZ BIOS file base name
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27h DWORD -> PINS
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2Bh WORD video memory size in 64K units
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2Dh DWORD linear address of linear frame buffer
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31h DWORD linear address of MGA control aperture
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35h WORD PCI bus/device for card???
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37h 201 BYTEs unused??? (cleared to 00h)
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<p>
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Format of Matrox PINS data (version 3.0):
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<a name=table126></a>
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Offset Size Description (Table 00126)
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00h 2 BYTEs signature ".A" (2Eh 41h)
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02h BYTE structure length (40h for v3.0)
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03h BYTE ???
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04h WORD PINS version (high byte = major, low byte = minor)
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06h WORD date last programmed
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08h WORD number of times programmed
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0Ah WORD flags
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0Ch 8 BYTEs ASCII serial number, three letters + five digits
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14h 8 BYTEs ???
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1Ch 4 BYTEs ASCII card version
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20h DWORD PCB revision
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24h BYTE maximum RAMDAC frequency in MHz (less 100)
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25h BYTE maximum RAMDAC frequency???
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26h BYTE maximum RAMDAc frequency???
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27h BYTE ???
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28h BYTE ??? timing data?
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29h BYTE ???
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2Ah BYTE ???
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2Bh BYTE ???
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2Ch BYTE ???
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2Dh BYTE ???
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2Eh BYTE ???
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2Fh BYTE ???
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30h 4 BYTEs ???
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34h BYTE ???
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35h BYTE ???
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36h BYTE ???
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37h BYTE memory size in 64K units
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38h BYTE ???
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39h BYTE ???
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3Ah BYTE ???
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3Bh BYTE ???
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3Ch BYTE ???
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3Dh BYTE ???
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3Eh BYTE ???
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3Fh BYTE checksum (to make sum of all bytes MOD 256 == 00h)
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</PRE>
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