1
0
kolibrios/kernel/branches/gfx_kernel/vmode/vmode.txt

53 lines
3.7 KiB
Plaintext
Raw Normal View History

Video Mode Driver ver.1.0 for MenuetOS
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This driver provide of hardware operation of all VGA-compatible videocard
P.S.
It may be added to SYSFUNCS.TXT
21 = SETUP FOR DEVICES
ebx = 13 - videodriver enable
ecx = 1 - Get DriverInfo and Driver Initial Set
edx = offset to 512-bytes area for DriverInfo
RETURN: eax = -1 - errors or driver not installed in system
eax = 'MDAZ' - driver ID => set information in info area
Info Structure:
+0 - Full driver name (ASCII string )
+32 - Driver version (dword)
+36 - Reserved
+64 - List of support videomodes
(max 32 positions) (word)
+128 - List of Support vertical rate
to each present mode (word):
+0 - 1st ver.rate for mode0
+2 - 2st ver.rate for mode0
+4 - 3st ver.rate for mode0
+8 - 4st ver.rate for mode0
+10 - 5st ver.rate for mode0
+12 - 1st ver.rate for mode1
+14 - 2st ver.rate for mode1
+16 - 3st ver.rate for mode1
+18 - 4st ver.rate for mode1
+20 - 5st ver.rate for mode1
ecx = 2 - Get Current Video Mode With Vertical Refresh Rate
RETURN: eax = -1 - errors
eax = X_screen*65536+Y_screen
ebx = current vertical rate
ecx = current video mode (number) [see infostruct]
ecx = 3 - Change Video Mode
edx = VertRate*65536+VideoMode [see infostruct]
RETURN: eax = -1 - errors
eax = 0 - set new videomode
ecx = 4 - Return at Start System Video Mode
RETURN: eax = -1 - errors
eax = 0 - set initial videomode
ecx = 5 - Change vertical and horizontal size of visible screen area
edx = 0/1 - -/+ horizontal size on 1 position
= 2/3 - -/+ vertical size on 1 position (8 pixels) (not complete yet)
RETURN: eax = -1 - errors
eax = 0 - succesfull