Specifications

D:\D\inter61a\INTERRUP.A Saturday, January 08, 2011 11:31 AM
30h WORD KB of offscreen memory
---VBE v3.0 ---
32h WORD bytes per scan line in linear modes
34h BYTE number of images (less one) for banked video modes
35h BYTE number of images (less one) for linear video modes
36h BYTE linear modes: size of direct color red mask (in bits)
37h BYTE linear modes: bit position of red mask LSB (e.g. shift count)
38h BYTE linear modes: size of direct color green mask (in bits)
39h BYTE linear modes: bit position of green mask LSB (e.g. shift count)
3Ah BYTE linear modes: size of direct color blue mask (in bits)
3Bh BYTE linear modes: bit position of blue mask LSB (e.g. shift count)
3Ch BYTE linear modes: size of direct color reserved mask (in bits)
3Dh BYTE linear modes: bit position of reserved mask LSB
3Eh DWORD maximum pixel clock for graphics video mode, in Hz
42h 190 BYTEs reserved (0)
Note: while VBE 1.1 and higher will zero out all unused bytes of the buffer,
v1.0 did not, so applications that want to be backward compatible
should clear the buffer before calling
Bitfields for VESA SuperVGA mode attributes:
Bit(s) Description (Table 00080)
0 mode supported by present hardware configuration
1 optional information available (must be =1 for VBE v1.2+)
2 BIOS output supported
3 set if color, clear if monochrome
4 set if graphics mode, clear if text mode
---VBE v2.0+ ---
5 mode is not VGA-compatible
6 bank-switched mode not supported
7 linear framebuffer mode supported
8 double-scan mode available (e.g. 320x200 and 320x240)
---VBE v3.0 ---
9 interlaced mode available
10 hardware supports triple buffering
11 hardware supports stereoscopic display
12 dual display start address support
13-15 reserved
---VBE/AF v1.0P---
9 application must call EnableDirectAccess before calling bank-switching
functions
SeeAlso: #00079
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