Specifications

D:\D\inter61a\INTERRUP.A Saturday, January 08, 2011 11:31 AM
10-9 reserved for future expansion
8-0 video mode number (0xxh are non-VESA modes, 1xxh are VESA-defined)
Format of VESA SuperVGA mode information:
Offset Size Description (Table 00079)
00h WORD mode attributes (see #00080)
02h BYTE window attributes, window A (see #00081)
03h BYTE window attributes, window B (see #00081)
04h WORD window granularity in KB
06h WORD window size in KB
08h WORD start segment of window A (0000h if not supported)
0Ah WORD start segment of window B (0000h if not supported)
0Ch DWORD -> FAR window positioning function (equivalent to AX=4F05h)
10h WORD bytes per scan line
---remainder is optional for VESA modes in v1.0/1.1, needed for OEM modes---
12h WORD width in pixels (graphics) or characters (text)
14h WORD height in pixels (graphics) or characters (text)
16h BYTE width of character cell in pixels
17h BYTE height of character cell in pixels
18h BYTE number of memory planes
19h BYTE number of bits per pixel
1Ah BYTE number of banks
1Bh BYTE memory model type (see #00082)
1Ch BYTE size of bank in KB
1Dh BYTE number of image pages (less one) that will fit in video RAM
1Eh BYTE reserved (00h for VBE 1.0-2.0, 01h for VBE 3.0)
---VBE v1.2+ ---
1Fh BYTE red mask size
20h BYTE red field position
21h BYTE green mask size
22h BYTE green field size
23h BYTE blue mask size
24h BYTE blue field size
25h BYTE reserved mask size
26h BYTE reserved mask position
27h BYTE direct color mode info
bit 0: color ramp is programmable
bit 1: bytes in reserved field may be used by application
---VBE v2.0+ ---
28h DWORD physical address of linear video buffer
2Ch DWORD pointer to start of offscreen memory
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