339 lines
17 KiB
HTML
339 lines
17 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>Int 10/AH=1Bh
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</TITLE>
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<META NAME="Description" CONTENT="
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Int 10/AH=1Bh - VIDEO - FUNCTIONALITY/STATE INFORMATION (PS,VGA/MCGA) -
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AH = 1Bh
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BX = implementation type
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0000h return funtionality/state information
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ES:DI - 64-byte buffer for state information (see #00040)
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Return: AL = 1Bh if function supported
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ES:DI buffer filled with state information
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BUG: Trident 8900 (BIOS D3.0 1991/11/12) and Trident 9000 (C3.0 1991/10/25)
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do not correctly set the fields at offsets 27h and 29h of the
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state information
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SeeAlso: AH=15h,AX=1A00h,AX=1F01h
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">
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<META NAME="robots" CONTENT="none">
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</HEAD>
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<BODY BGCOLOR="#FFD0A0">
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<center>
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<h2>Int 10/AH=1Bh
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</h2>
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</center><p>
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<table border=1 cellpadding=3 cellspacing=1>
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<td>
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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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<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>VIDEO - FUNCTIONALITY/STATE INFORMATION (PS,VGA/MCGA)</font></h3>
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<PRE>
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AH = 1Bh
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BX = implementation type
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0000h return funtionality/state information
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ES:DI -> 64-byte buffer for state information <a href="rb-0221.htm#Table40" tppabs="http://www.ctyme.com/intr/rb-0221.htm#Table40">(see #00040)</a><br>
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<p><b>Return:</b><br>AL = 1Bh if function supported
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ES:DI buffer filled with state information
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</PRE>
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<p><b>BUG:</b>
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Trident 8900 (BIOS D3.0 1991/11/12) and Trident 9000 (C3.0 1991/10/25)
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do not correctly set the fields at offsets 27h and 29h of the
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state information
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<p><b>See Also:</b>
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<a href="rb-0215.htm" tppabs="http://www.ctyme.com/intr/rb-0215.htm">AH=15h</a> - <a href="rb-0219.htm" tppabs="http://www.ctyme.com/intr/rb-0219.htm">AX=1A00h</a> - <a href="rb-0238.htm" tppabs="http://www.ctyme.com/intr/rb-0238.htm">AX=1F01h</a>
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<PRE>
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<p>
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Format of MCGA+ state information:
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<a name=table40></a>
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Offset Size Description (Table 00040)
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00h DWORD address of static funtionality table <a href="rb-0221.htm#Table45" tppabs="http://www.ctyme.com/intr/rb-0221.htm#Table45">(see #00045)</a>
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04h BYTE video mode in effect
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05h WORD number of columns
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07h WORD length of regen buffer in bytes
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09h WORD starting address of regen buffer
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0Bh WORD cursor position for page 0
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0Dh WORD cursor position for page 1
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0Fh WORD cursor position for page 2
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11h WORD cursor position for page 3
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13h WORD cursor position for page 4
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15h WORD cursor position for page 5
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17h WORD cursor position for page 6
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19h WORD cursor position for page 7
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1Bh WORD cursor "type" (start/stop scan lines)
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1Dh BYTE active display page
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1Eh WORD CRTC port address
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20h BYTE current setting of PORT 03x8h
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21h BYTE current setting of PORT 03x9h
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22h BYTE number of rows - 1
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23h WORD bytes/character
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25h BYTE display combination code of active display
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26h BYTE DCC of alternate display
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27h WORD number of colors supported in current mode (0000h = mono)
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29h BYTE number of pages supported in current mode
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2Ah BYTE number of scan lines active
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(0,1,2,3) = (200,350,400,480)
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<p><b>Tseng ET3000:</b><br>(4,5,6 = 512,600,768)
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2Bh BYTE primary character block
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2Ch BYTE secondary character block
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2Dh BYTE miscellaneous flags <a href="rb-0221.htm#Table41" tppabs="http://www.ctyme.com/intr/rb-0221.htm#Table41">(see #00041)</a>
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2Eh BYTE non-VGA mode support <a href="rb-0221.htm#Table42" tppabs="http://www.ctyme.com/intr/rb-0221.htm#Table42">(see #00042)</a>
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2Fh 2 BYTEs reserved (00h)
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31h BYTE video memory available
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00h = 64K, 01h = 128K, 02h = 192K, 03h = 256K
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32h BYTE save pointer state flags <a href="rb-0221.htm#Table43" tppabs="http://www.ctyme.com/intr/rb-0221.htm#Table43">(see #00043)</a>
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33h BYTE display information and status <a href="rb-0221.htm#Table44" tppabs="http://www.ctyme.com/intr/rb-0221.htm#Table44">(see #00044)</a>
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34h 12 BYTEs reserved (00h)
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<p>
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Bitfields for miscellaneous flags:
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<a name=table41></a>
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Bit(s) Description (Table 00041)
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0 all modes on all displays on
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1 gray summing on
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2 monochrome display attached
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3 default palette loading disabled
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4 cursor emulation enabled
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5 0 = intensity; 1 = blinking
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6 flat-panel display is active
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7 unused (0)
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</PRE>
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<p><b>See Also:</b>
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#00040
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<PRE>
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<p>
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Bitfields for non-VGA mode support:
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<a name=table42></a>
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Bit(s) Description (Table 00042)
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7-5 reserved
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4 132-column mode supported
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3 =1 MFI attributes enabled (see AH=12h/BL=37h).
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=0 VGA attributes
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2 16-bit VGA graphics present
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1 adapter interface driver required
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0 BIOS supports information return for adapter interface
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</PRE>
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<p><b>See Also:</b>
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#00040
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<PRE>
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<p>
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Bitfields for save pointer state flags:
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<a name=table43></a>
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Bit(s) Description (Table 00043)
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0 512 character set active
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1 dynamic save area present
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2 alpha font override active
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3 graphics font override active
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4 palette override active
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5 DCC override active
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6-7 unused (0)
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</PRE>
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<p><b>See Also:</b>
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#00040
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<PRE>
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<p>
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Bitfields for display information and status:
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<a name=table44></a>
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Bit(s) Description (Table 00044)
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7 640x480 flat-panel can be used simultaneously with CRT controller
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6-3 reserved
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2 color display
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1 flat-panel display active
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0 flat-panel display attached
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</PRE>
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<p><b>See Also:</b>
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#00040
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<PRE>
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<p>
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Format of Static Functionality Table:
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<a name=table45></a>
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Offset Size Description (Table 00045)
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00h BYTE modes supported 1
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bit 0 to bit 7 = 1 modes 0,1,2,3,4,5,6,7 supported
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01h BYTE modes supported 2
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bit 0 to bit 7 = 1 modes 8,9,0Ah,0Bh,0Ch,0Dh,0Eh,0Fh supported
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02h BYTE modes supported 3
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bit 0 to bit 3 = 1 modes 10h,11h,12h,13h supported
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bit 4 to bit 7 unused (0)
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03h BYTE (IBM) reserved
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(Tseng ET3000/4000) modes supported 4
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bit 0 to bit 7 = modes 18h-1Fh supported
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04h BYTE (IBM) reserved
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(Tseng ET3000/4000) modes supported 5
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bit 0 to bit 7 = modes 20h-27h supported
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05h BYTE (IBM) reserved
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(Tseng ET3000/4000) modes supported 6
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bit 0 to bit 7 = modes 28h-2Fh supported
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06h BYTE (IBM) reserved
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(Tseng ET3000/4000) modes supported 7
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bit 0 to bit 7 = modes 30h-37h supported
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07h BYTE scan lines supported
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bit 0 to bit 2 = 1 if scan lines 200,350,400 supported
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bits 3-7 = unused (0)
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08h BYTE total number of character blocks available in text modes
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09h BYTE maximum number of active character blocks in text modes
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0Ah WORD miscellaneous function support flags <a href="rb-0221.htm#Table46" tppabs="http://www.ctyme.com/intr/rb-0221.htm#Table46">(see #00046)</a>
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0Ch WORD reserved
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0Eh BYTE save pointer function flags <a href="rb-0221.htm#Table47" tppabs="http://www.ctyme.com/intr/rb-0221.htm#Table47">(see #00047)</a>
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0Fh BYTE reserved
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</PRE>
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<p><b>See Also:</b>
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#00040
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<PRE>
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<p>
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Bitfields for miscellaneous function support flags:
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<a name=table46></a>
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Bit(s) Description (Table 00046)
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0 all modes on all displays function supported
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1 gray summing function supported
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2 character font loading function supported
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3 default palette loading enable/disable supported
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4 cursor emulation function supported
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5 EGA palette present
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6 color palette present
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7 color-register paging function supported
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8 light pen supported (see AH=04h)
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9 save/restore state function 1Ch supported
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10 intensity/blinking function supported (see AX=1003h)
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11 Display Combination Code supported <a href="rb-0219.htm#Table39" tppabs="http://www.ctyme.com/intr/rb-0219.htm#Table39">(see #00039)</a>
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12-15 unused (0)
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</PRE>
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<p><b>See Also:</b>
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#00040
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<PRE>
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<p>
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Bitfields for save pointer function flags:
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<a name=table47></a>
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Bit(s) Description (Table 00047)
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0 512 character set supported
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1 dynamic save area supported
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2 alpha font override supported
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3 graphics font override supported
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4 palette override supported
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5 DCC extension supported
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6-7 unused (0)
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</PRE>
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<p><b>See Also:</b>
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#00040
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<p>
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<b>Category: <a href="cat-046.htm" tppabs="http://www.ctyme.com/intr/cat-046.htm">
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Video</a>
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- <a href="int-10.htm" tppabs="http://www.ctyme.com/intr/int-10.htm">
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Int 10h</a>
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- <a href="alpha-v.htm" tppabs="http://www.ctyme.com/intr/alpha-v.htm">
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V</a>
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</b><p><p><img src="rbline.gif" tppabs="http://graphics.ctyme.com/gif/rbline.gif" width="100%" alt="------"><p>
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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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