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Rev | Author | Line No. | Line |
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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 |