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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 129 | mikedld | 1 | Video Mode Driver ver.1.0 for MenuetOS |
| 2 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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| 3 | This driver provide of hardware operation of all VGA-compatible videocard |
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| 4 | |||
| 5 | |||
| 6 | P.S. |
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| 7 | It may be added to SYSFUNCS.TXT |
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| 8 | |||
| 9 | 21 = SETUP FOR DEVICES |
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| 10 | |||
| 11 | ebx = 13 - videodriver enable |
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| 12 | ecx = 1 - Get DriverInfo and Driver Initial Set |
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| 13 | edx = offset to 512-bytes area for DriverInfo |
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| 14 | RETURN: eax = -1 - errors or driver not installed in system |
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| 15 | eax = 'MDAZ' - driver ID => set information in info area |
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| 16 | Info Structure: |
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| 17 | +0 - Full driver name (ASCII string ) |
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| 18 | +32 - Driver version (dword) |
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| 19 | +36 - Reserved |
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| 20 | +64 - List of support videomodes |
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| 21 | (max 32 positions) (word) |
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| 22 | +128 - List of Support vertical rate |
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| 23 | to each present mode (word): |
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| 24 | +0 - 1st ver.rate for mode0 |
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| 25 | +2 - 2st ver.rate for mode0 |
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| 26 | +4 - 3st ver.rate for mode0 |
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| 27 | +8 - 4st ver.rate for mode0 |
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| 28 | +10 - 5st ver.rate for mode0 |
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| 29 | |||
| 30 | +12 - 1st ver.rate for mode1 |
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| 31 | +14 - 2st ver.rate for mode1 |
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| 32 | +16 - 3st ver.rate for mode1 |
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| 33 | +18 - 4st ver.rate for mode1 |
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| 34 | +20 - 5st ver.rate for mode1 |
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| 35 | |||
| 36 | ecx = 2 - Get Current Video Mode With Vertical Refresh Rate |
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| 37 | RETURN: eax = -1 - errors |
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| 38 | eax = X_screen*65536+Y_screen |
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| 39 | ebx = current vertical rate |
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| 40 | ecx = current video mode (number) [see infostruct] |
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| 41 | ecx = 3 - Change Video Mode |
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| 42 | edx = VertRate*65536+VideoMode [see infostruct] |
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| 43 | RETURN: eax = -1 - errors |
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| 44 | eax = 0 - set new videomode |
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| 45 | ecx = 4 - Return at Start System Video Mode |
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| 46 | RETURN: eax = -1 - errors |
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| 47 | eax = 0 - set initial videomode |
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| 48 | ecx = 5 - Change vertical and horizontal size of visible screen area |
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| 49 | edx = 0/1 - -/+ horizontal size on 1 position |
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| 50 | = 2/3 - -/+ vertical size on 1 position (8 pixels) (not complete yet) |
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| 51 | RETURN: eax = -1 - errors |
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| 52 | eax = 0 - succesfull |
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| 53 |