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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1063 | tullio | 1 | |
| 2 | /* |
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| 3 | * This program is free software; you can redistribute it and/or modify |
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| 4 | * it under the terms of the GNU General Public License as published by |
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| 5 | * the Free Software Foundation; either version 2 of the License, or |
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| 6 | * (at your option) any later version. |
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| 7 | * |
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| 8 | * This program is distributed in the hope that it will be useful, |
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| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 11 | * GNU General Public License for more details. |
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| 12 | * |
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| 13 | * You should have received a copy of the GNU General Public License |
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| 14 | * along with this program; if not, write to the Free Software |
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| 15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 16 | * |
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| 17 | */ |
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| 18 | |||
| 2 | pj | 19 | #include <ll/i386/hw-data.h> |
| 20 | #include <ll/i386/mem.h> |
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| 1621 | fabio | 21 | #include <arch/i386/string.h> |
| 2 | pj | 22 | #include <ll/i386/x-dos.h> |
| 23 | #include <ll/i386/x-dosmem.h> |
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| 24 | #include <ll/i386/cons.h> |
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| 25 | #include <ll/sys/ll/ll-func.h> |
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| 26 | |||
| 27 | #include "vesa.h" |
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| 28 | #include "chips.h" |
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| 29 | |||
| 30 | |||
| 31 | VbeInfoBlock VbeInfo; /* VBE 2.0 Informations */ |
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| 32 | DWORD vbe_screen; /* Frame Linear Buffer Address */ |
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| 33 | |||
| 34 | char VideoModeNames [96][40] = { |
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| 35 | "100 - 640x400 256 colors", "101 - 640x480 256 colors", "102 - 800x600 16 colors", |
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| 36 | "103 - 800x600 256 colors", "104 - 1024x768 16 colors", "105 - 1024x768 256 colors", |
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| 37 | "106 - 1280x1024 16 colors", "107 - 1280x1024 256 colors", "108 - 80x60 Text Mode", |
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| 38 | "109 - 132x25 Text Mode", "10A - 132x43 Text Mode", "10B - 132x50 Text Mode", |
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| 39 | "10C - 132x60 Text Mode", "10D - 320x200 32,768 colors", "10E - 320x200 65,536 colors", |
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| 40 | "10F - 320x200 16m colors", "110 - 640x480 32,768 colors", "111 - 640x480 65,536 colors", |
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| 41 | "112 - 640x480 16m colors", "113 - 800x600 32,768 colors", "114 - 800x600 65,536 colors", |
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| 42 | "115 - 800x600 16m colors", "116 - 1024x768 32,768 colors", "117 - 1024x768 65,536 colors", |
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| 43 | "118 - 1024x768 16m colors", "119 - 1280x1024 32,768 colors", "11A - 1280x1024 65,536 colors", |
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| 44 | "11B - 1280x1024 16m colors", "11C - 640x350 256 colors", "11D - 640x350 32,768 colors", |
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| 45 | "11E - 640x400 32,768 colors", "11F - 640x350 65,536 colors", "120 - 640x400 65,536 colors", |
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| 46 | "121 - 640x350 16m colors", "122 - 640x400 16m colors", "123 - 1600x1200 16 colors", |
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| 47 | "124 - 1600x1200 256 colors", "125 - 1600x1200 32,768 colors", "126 - 1600x1200 65,536 colors", |
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| 48 | "127 - 1600x1200 16m colors", "128 - 640x480 16m colors(*)", "129 - 800x600 16m colors(*)", |
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| 49 | "12A - 1024x768 16m colors(*)", "12B - 1280x1024 16m colors(*)", "12C - 1600x1200 16m colors(*)", |
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| 50 | "12D - 320x240 32,768 colors", "12E - 320x400 32,768 colors", "12F - 360x200 32,768 colors", |
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| 51 | "130 - 360x240 32,768 colors", "131 - 360x400 32,768 colors", "132 - 320x240 65,536 colors", |
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| 52 | "133 - 320x400 65,536 colors", "134 - 360x200 65,536 colors", "135 - 360x240 65,536 colors", |
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| 53 | "136 - 360x400 65,536 colors", "137 - 320x240 16m colors", "138 - 320x400 16m colors", |
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| 54 | "139 - name n/a", "13A - name n/a", "13B - name n/a", |
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| 55 | "13C - name n/a", "13D - name n/a", "13E - name n/a", |
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| 56 | "13F - name n/a", "140 - name n/a", "141 - name n/a", |
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| 57 | "142 - 640x350 16m colors(*)", "143 - 640x400 16m colors(*)", "144 - name n/a", |
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| 58 | "145 - name n/a", "146 - name n/a", "147 - name n/a", |
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| 59 | "148 - name n/a", "149 - name n/a", "14A - name n/a", |
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| 60 | "14B - name n/a", "14C - name n/a", "14D - name n/a", |
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| 61 | "14E - name n/a", "14F - name n/a", "150 - 640x350 16 colors", |
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| 62 | "151 - 640x400 16 colors", "152 - 640x480 16 colors", "153 - 320x200 256 colors", |
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| 63 | "154 - 320x240 256 colors", "155 - 320x400 256 colors", "156 - 360x200 256 colors", |
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| 64 | "157 - 360x240 256 colors", "158 - 360x400 256 colors", "159 - name n/a", |
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| 65 | "15A - name n/a", "15B - name n/a", "15C - name n/a", |
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| 66 | "15D - name n/a", "15E - name n/a", "15F - name n/a" |
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| 67 | }; |
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| 68 | |||
| 69 | int vbe_check_status (WORD vbe_function_result) |
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| 70 | { |
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| 71 | /* |
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| 72 | if (vbe_function_result != 0x004f) { |
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| 73 | cprintf("\nWarning! There was an error: (%x) ", vbe_function_result); |
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| 74 | switch (vbe_function_result) { |
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| 75 | case 0x014f : cprintf("generic."); break; |
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| 76 | case 0x024f : cprintf("hardware incompatibility."); break; |
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| 77 | case 0x034f : cprintf("unvalid function."); break; |
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| 78 | default : cprintf("unknown error %x.\n", vbe_function_result); |
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| 79 | } |
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| 80 | */ |
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| 81 | if (vbe_function_result != 0x004f) { |
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| 82 | switch (vbe_function_result) { |
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| 83 | case 0x014f : return -1; /* VBE Generic error */ |
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| 84 | case 0x024f : return -2; /* Hardware incompatibility error */ |
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| 85 | case 0x034f : return -3; /* Unvalid function requested */ |
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| 86 | default : return -4; /* Unknown error */ |
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| 87 | } |
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| 88 | } |
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| 89 | return 1; |
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| 90 | } |
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| 91 | |||
| 92 | int vbe_getinfo(void) |
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| 93 | { |
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| 94 | BYTE p1,p2; |
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| 95 | X_REGS16 inregs, outregs; /* registri normali */ |
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| 96 | X_SREGS16 sregs; /* registri estesi */ |
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| 97 | LIN_ADDR DOSaddr; |
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| 98 | DWORD linearaddr; |
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| 99 | |||
| 100 | /* Allochiamo mem per il nostro blocco */ |
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| 101 | if ((DOSaddr = DOS_alloc(sizeof(VbeInfoBlock))) == 0) { |
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| 102 | /* set_text_mode ();*/ |
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| 103 | return -1; |
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| 104 | } else { |
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| 105 | /* linearaddr = appl2linear(DOSaddr);*/ |
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| 106 | linearaddr = (DWORD) DOSaddr; |
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| 107 | |||
| 108 | /* 0x00 = Get Vbe2.0 Info */ |
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| 109 | inregs.x.ax = 0x4f00; |
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| 110 | /* Indirizzo reale del nostro blocco */ |
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| 111 | inregs.x.di = linearaddr & 0x000F; |
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| 112 | sregs.es = ((linearaddr & 0xFFFF0) >> 4); |
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| 113 | sregs.ds = ((linearaddr & 0xFFFF0) >> 4); |
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| 114 | |||
| 115 | /* Settiamo il VbeSignature correttamente */ |
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| 116 | VbeInfo.VbeSignature[0] = 'V'; |
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| 117 | VbeInfo.VbeSignature[1] = 'B'; |
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| 118 | VbeInfo.VbeSignature[2] = 'E'; |
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| 119 | VbeInfo.VbeSignature[3] = '2'; |
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| 120 | |||
| 121 | memcpy((void *)linearaddr, &VbeInfo, sizeof(VbeInfo)); |
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| 122 | p1 = inp(0x21); |
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| 123 | p2 = inp(0xA1); |
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| 124 | outp(0x21,0xFF); |
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| 125 | outp(0xA1,0xFF); |
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| 126 | X_callBIOS(0x10, &inregs, &outregs, &sregs); |
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| 127 | outp(0x21,p1); |
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| 128 | outp(0xA1,p2); |
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| 129 | if (vbe_check_status(outregs.x.ax) < 0) |
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| 130 | return -1; |
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| 131 | memcpy(&VbeInfo, (void *)linearaddr, sizeof(VbeInfo)); |
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| 132 | return 1; |
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| 133 | } |
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| 134 | } |
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| 135 | |||
| 136 | int vbe_check(char *key) |
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| 137 | { |
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| 138 | LIN_ADDR VendorNameaddr; |
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| 139 | char VendorName[256]; |
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| 140 | int i, k, len, found; |
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| 141 | |||
| 142 | found = CHIP_NOT_FOUND; |
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| 143 | VendorNameaddr = (void *)((VbeInfo.OemNameSegment<<4) + VbeInfo.OemNameOffset); |
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| 144 | memcpy(VendorName, VendorNameaddr, 256); |
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| 145 | |||
| 146 | len = strlen(key); |
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| 147 | for (i = 0; i <= 512 - len; i++) { |
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| 148 | if (VendorName[i] == key[0]) { |
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| 149 | found = CHIP_FOUND; |
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| 150 | for (k = 1; k < len; k++) { |
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| 151 | if (VendorName[i + k] != key[k]) found = CHIP_NOT_FOUND; |
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| 152 | } |
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| 153 | if (found == CHIP_FOUND) return found; |
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| 154 | } |
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| 155 | } |
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| 156 | return found; |
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| 157 | } |
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| 158 | |||
| 159 | int vbe_check_id(void) |
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| 160 | { |
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| 161 | if (vbe_check("Chips") == CHIP_FOUND) return CHIPS; |
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| 162 | if (vbe_check("Cirrus") == CHIP_FOUND) return CIRRUS; |
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| 163 | if (vbe_check("Diamond") == CHIP_FOUND) return DIAMOND; |
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| 164 | if (vbe_check("ITT") == CHIP_FOUND) return ITT; |
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| 165 | if (vbe_check("Western Digital") == CHIP_FOUND) return WD; |
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| 166 | if (vbe_check("S3") == CHIP_FOUND) return S3; |
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| 167 | if (vbe_check("Trident") == CHIP_FOUND) return TRIDENT; |
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| 168 | if (vbe_check("Tseng") == CHIP_FOUND) return TSENG; |
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| 169 | return UNKNOWN; |
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| 170 | } |
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| 171 | |||
| 172 | void vbe_showinfo(void) |
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| 173 | { |
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| 174 | char Name[256], VendorName[256], ProductName[256], ProductRev[256]; |
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| 175 | LIN_ADDR Nameaddr, VendorNameaddr, ProductNameaddr, ProductRevaddr; |
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| 176 | |||
| 177 | Nameaddr = (LIN_ADDR)((VbeInfo.OemNameSegment<<4) + VbeInfo.OemNameOffset); |
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| 178 | memcpy(Name, Nameaddr, 256); |
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| 179 | |||
| 180 | VendorNameaddr = (LIN_ADDR)((VbeInfo.OemVendorNameSegment<<4) + VbeInfo.OemVendorNameOffset); |
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| 181 | memcpy(VendorName, VendorNameaddr, 256); |
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| 182 | |||
| 183 | ProductNameaddr = (LIN_ADDR)((VbeInfo.OemProductNameSegment<<4) + VbeInfo.OemProductNameOffset); |
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| 184 | memcpy(ProductName, ProductNameaddr, 256); |
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| 185 | |||
| 186 | ProductRevaddr = (LIN_ADDR)((VbeInfo.OemProductRevSegment<<4) + VbeInfo.OemProductRevOffset); |
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| 187 | memcpy(ProductRev, ProductRevaddr, 256); |
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| 188 | |||
| 189 | cprintf ("\n"); |
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| 190 | |||
| 191 | cprintf ("Software ................. %s\n", Name); |
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| 192 | |||
| 193 | if (VendorNameaddr == 0) cprintf ("Vendor Name .............. n/a\n"); |
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| 194 | else cprintf ("Vendor Name .............. %s\n", VendorName); |
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| 195 | |||
| 196 | if (ProductNameaddr == 0) cprintf ("Product Name ............. n/a\n"); |
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| 197 | else cprintf ("Product Name ............. %s\n", ProductName); |
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| 198 | |||
| 199 | if (ProductRevaddr == 0) cprintf ("Product Revision ......... n/a\n"); |
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| 200 | else cprintf ("Product Revision ......... %s\n", ProductRev); |
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| 201 | |||
| 202 | cprintf ("--------------------------------------------------------\n"); |
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| 203 | |||
| 204 | cprintf ("Driver Version............ %d.%d\n", VbeInfo.VbeVersion/100, |
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| 205 | VbeInfo.VbeVersion%100); |
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| 206 | |||
| 207 | cprintf ("Total Memory OnBoard...... %d Kb\n", VbeInfo.TotalMemory<<6); |
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| 208 | |||
| 209 | cprintf ("Capabilities:\n"); |
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| 210 | |||
| 211 | (VbeInfo.Capabilities[0]&1) ? cprintf (" - DAC is fixed width, with 6 bits per primary color\n") |
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| 212 | : cprintf (" - DAC width is switchable to 8 bits per primary color\n"); |
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| 213 | (VbeInfo.Capabilities[0]&2) ? cprintf (" - Controller is VGA compatible\n") |
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| 214 | : cprintf (" - Controller is not VGA compatible\n"); |
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| 215 | (VbeInfo.Capabilities[0]&3) ? cprintf (" - Normal RAMDAC operation\n") |
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| 216 | : cprintf (" - RAMDAC recommends programming during blank period only\n"); |
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| 217 | } |
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| 218 | |||
| 219 | void vbe_showmodes(void) |
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| 220 | { |
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| 221 | short int modec; |
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| 222 | WORD list; |
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| 223 | LIN_ADDR VideoModeaddr; |
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| 224 | |||
| 225 | list=0; |
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| 226 | VideoModeaddr = (LIN_ADDR)((VbeInfo.SupportedModesSegment<<4) + VbeInfo.SupportedModesOffset); |
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| 227 | |||
| 228 | cprintf ("\nList of modes supported:\n"); |
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| 229 | do { |
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| 230 | /*modec = (unsigned char) DOSPeek(VideoModePtr);*/ |
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| 231 | memcpy(&modec, VideoModeaddr, 2); |
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| 232 | VideoModeaddr += 2; |
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| 233 | if (modec != -1) cprintf (" %s ", VideoModeNames[modec - 0x100]); |
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| 234 | /* cprintf("%x/%d ", modec, (modec & 0xFF));*/ |
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| 235 | list++; |
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| 236 | if (list % 2 == 0) cprintf ("\n"); |
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| 237 | } while ((modec != -1) && (list < 40)); |
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| 238 | |||
| 239 | cprintf ("\nToal modes supported: %d", list); |
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| 240 | } |
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| 241 | |||
| 242 | DWORD vbe_getmodeinfo(ModeInfoBlock *ModeInfo, WORD Vbe_Mode) |
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| 243 | { |
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| 244 | BYTE p1,p2; |
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| 245 | X_REGS16 inregs, outregs; |
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| 246 | X_SREGS16 sregs; |
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| 247 | LIN_ADDR dosaddr; |
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| 248 | |||
| 249 | if ((dosaddr = DOS_alloc(sizeof(ModeInfoBlock))) == 0) { |
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| 250 | /* set_text_mode ();*/ |
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| 251 | return(-1); |
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| 252 | } |
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| 253 | /* linearaddr = far2linear(DOSaddr); */ |
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| 254 | |||
| 255 | /* 0x01 = Get Vbe Mode Info */ |
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| 256 | inregs.x.ax = 0x4f01; |
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| 257 | inregs.x.cx = Vbe_Mode; |
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| 258 | |||
| 259 | inregs.x.di = (DWORD)dosaddr & 0x000F; |
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| 260 | sregs.es = (((DWORD)dosaddr & 0xFFFF0) >> 4); |
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| 261 | sregs.ds = (((DWORD)dosaddr & 0xFFFF0) >> 4); |
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| 262 | |||
| 263 | p1 = inp(0x21); |
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| 264 | p2 = inp(0xA1); |
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| 265 | outp(0x21,0xFF); |
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| 266 | outp(0xA1,0xFF); |
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| 267 | X_callBIOS(0x10, &inregs, &outregs, &sregs); |
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| 268 | outp(0x21,p1); |
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| 269 | outp(0xA1,p2); |
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| 270 | if (vbe_check_status (outregs.x.ax) < 0) { |
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| 271 | return -1; |
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| 272 | } |
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| 273 | |||
| 274 | memcpy(ModeInfo, dosaddr, sizeof(ModeInfoBlock)); |
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| 275 | |||
| 276 | vbe_screen = ModeInfo->PhysBasePtr; |
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| 277 | if(vbe_screen == -1) { |
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| 278 | return -1; |
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| 279 | } |
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| 280 | return vbe_screen; |
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| 281 | } |
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| 282 | |||
| 283 | DWORD vbe_getflb(void) |
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| 284 | { |
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| 285 | return vbe_screen; |
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| 286 | } |
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| 287 | |||
| 288 | int vbe_setmode (WORD Vbe_Mode) |
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| 289 | { |
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| 290 | BYTE p1,p2; |
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| 291 | X_REGS16 inregs, outregs; |
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| 292 | X_SREGS16 sregs; |
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| 293 | |||
| 294 | /* Se volessimo il Linear Frame Buffer, dovremmo fare |
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| 295 | Vbe_Mode = Vbe_Mode | 0x4000; |
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| 296 | */ |
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| 297 | memset (&inregs, 0, sizeof(inregs)); |
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| 298 | /* Set Vesa Vbe mode */ |
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| 299 | inregs.x.ax = 0x4f02; |
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| 300 | inregs.x.bx = Vbe_Mode; |
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| 301 | p1 = inp(0x21); |
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| 302 | p2 = inp(0xA1); |
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| 303 | outp(0x21,0xFF); |
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| 304 | outp(0xA1,0xFF); |
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| 305 | X_callBIOS(0x10, &inregs, &outregs, &sregs); |
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| 306 | outp(0x21,p1); |
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| 307 | outp(0xA1,p2); |
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| 308 | |||
| 309 | return vbe_check_status (outregs.x.ax); |
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| 310 | } |
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| 311 | |||
| 312 | WORD vbe_getbpr(ModeInfoBlock *ModeInfo) |
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| 313 | { |
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| 314 | return ModeInfo->BytesPerScanLine; |
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| 315 | } |
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| 316 | |||
| 317 | int vbe_setbank(ModeInfoBlock *ModeInfo, BYTE bank) |
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| 318 | { |
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| 319 | BYTE p1,p2; |
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| 320 | X_REGS16 inregs, outregs; |
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| 321 | X_SREGS16 sregs; |
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| 322 | |||
| 323 | memset (&inregs, 0, sizeof(inregs)); |
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| 324 | memset (&sregs, 0, sizeof(sregs)); |
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| 325 | /* Set Window */ |
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| 326 | inregs.x.ax = 0x4f05; |
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| 327 | inregs.h.bh = 0x00; |
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| 328 | inregs.h.bl = 0x00; |
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| 329 | inregs.x.dx = (64 / ModeInfo->WinGranularity) * bank; |
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| 330 | p1 = inp(0x21); |
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| 331 | p2 = inp(0xA1); |
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| 332 | outp(0x21,0xFF); |
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| 333 | outp(0xA1,0xFF); |
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| 334 | X_callBIOS(0x10, &inregs, &outregs, &sregs); |
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| 335 | outp(0x21,p1); |
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| 336 | outp(0xA1,p2); |
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| 337 | return vbe_check_status (outregs.x.ax); |
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| 338 | } |
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| 339 | |||
| 340 | void vbe_showmodeinfo (ModeInfoBlock *ModeInfo) |
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| 341 | { |
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| 342 | cprintf ("\n Mode: %dx%dx%d (%d bits)", ModeInfo->XResolution, |
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| 343 | ModeInfo->YResolution, |
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| 344 | ModeInfo->BitsPerPixel<<5, |
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| 345 | ModeInfo->BitsPerPixel); |
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| 346 | |||
| 347 | (ModeInfo->ModeAttributes&1)? cprintf ("\n - Mode SUPPORTED in hardware configuration") |
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| 348 | : cprintf ("\n - Mode NOT supported in hardware configuration"); |
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| 349 | (ModeInfo->ModeAttributes&5)? cprintf ("\n - Color Mode") |
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| 350 | : cprintf ("\n - Text Mode"); |
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| 351 | (ModeInfo->ModeAttributes&6)? cprintf ("\n - Not VGA compatible") |
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| 352 | : cprintf ("\n - VGA compatible"); |
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| 353 | (ModeInfo->ModeAttributes&7)? cprintf ("\n - Windowed memory mode available") |
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| 354 | : cprintf ("\n - Windowed memory NOT mode available"); |
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| 355 | (ModeInfo->ModeAttributes&8)? cprintf ("\n - Linear Frame Buffer available :-)") |
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| 356 | : cprintf ("\n - Linear Frame Buffer NOT available :-("); |
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| 357 | |||
| 358 | cprintf ("\n\n Bytes Per ScanLine %d", ModeInfo->BytesPerScanLine); |
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| 359 | |||
| 360 | cprintf ("\n\n Window A Attributes:"); |
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| 361 | (ModeInfo->WinAAttributes&1)? cprintf ("\n - Window is relocatable") |
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| 362 | : cprintf ("\n - Window is not relocatable"); |
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| 363 | (ModeInfo->WinAAttributes&2)? cprintf ("\n - Window is readable") |
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| 364 | : cprintf ("\n - Window is not readable"); |
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| 365 | (ModeInfo->WinAAttributes&3)? cprintf ("\n - Window is writeable") |
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| 366 | : cprintf ("\n - Window is not writeable"); |
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| 367 | |||
| 368 | /* Tolgo x leggere... |
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| 369 | cprintf ("\n\n Window B Attributes:"); |
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| 370 | (ModeInfo->WinBAttributes&1)? cprintf ("\n - Window is relocatable") |
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| 371 | : cprintf ("\n - Window is not relocatable"); |
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| 372 | (ModeInfo->WinBAttributes&2)? cprintf ("\n - Window is readable") |
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| 373 | : cprintf ("\n - Window is not readable"); |
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| 374 | (ModeInfo->WinBAttributes&3)? cprintf ("\n - Window is writeable") |
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| 375 | : cprintf ("\n - Window is not writeable"); |
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| 376 | */ |
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| 377 | cprintf ("\n\n Window granularity %u Kb", ModeInfo->WinGranularity); |
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| 378 | cprintf ("\n Window size %u Kb", ModeInfo->WinSize); |
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| 379 | cprintf ("\n Segment: %x", ModeInfo->WinBSegment); |
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| 380 | cprintf ("\n\n Memory Model is "); |
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| 381 | switch (ModeInfo->MemoryModel) |
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| 382 | { |
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| 383 | case 0x00: cprintf ("Text Mode"); break; |
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| 384 | case 0x01: cprintf ("CGA Graphics"); break; |
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| 385 | case 0x02: cprintf ("Hercules Graphics"); break; |
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| 386 | case 0x03: cprintf ("Planar"); break; |
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| 387 | case 0x04: cprintf ("Packed Pixel"); break; |
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| 388 | case 0x05: cprintf ("Non-chain 4, 256 color"); break; |
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| 389 | case 0x06: cprintf ("Direct Color"); break; |
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| 390 | case 0x07: cprintf ("YUV Color"); break; |
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| 391 | default: cprintf ("to be defined by OEM"); |
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| 392 | } |
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| 393 | |||
| 394 | cprintf ("\n Number of Banks %u", ModeInfo->NumberOfBanks); |
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| 395 | cprintf ("\n Bank Size %u Kb\n", ModeInfo->BankSize); |
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| 396 | |||
| 397 | /* cprintf ("\n Red Mask Size %d (%d)", ModeInfo->RedMaskSize, ModeInfo->RedFieldPosition); |
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| 398 | cprintf ("\n Green Mask Size %d (%d)", ModeInfo->GreenMaskSize, ModeInfo->GreenFieldPosition); |
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| 399 | cprintf ("\n Blue Mask Size %d (%d)", ModeInfo->BlueMaskSize, ModeInfo->BlueFieldPosition); |
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| 400 | |||
| 401 | cprintf ("\n\nColor Mode Info:"); |
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| 402 | (ModeInfo->DirectColorModeInfo&1)? cprintf ("\n - Color ramp is programmable") |
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| 403 | : cprintf ("\n - Color ramp is fixed"); |
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| 404 | (ModeInfo->DirectColorModeInfo&2)? cprintf ("\n - Bits in Rsvd are usable") |
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| 405 | : cprintf ("\n - Bits in Rsvd are reserved");*/ |
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| 406 | } |
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| 407 | |||
| 408 | int vbe_checkmode(WORD mode) |
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| 409 | { |
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| 410 | LIN_ADDR VideoModeaddr; |
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| 411 | short int modec; |
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| 412 | BYTE done; |
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| 413 | |||
| 414 | done = 0; |
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| 415 | VideoModeaddr = (LIN_ADDR)((VbeInfo.SupportedModesSegment<<4) + VbeInfo.SupportedModesOffset); |
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| 416 | do { |
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| 417 | memcpy(&modec, VideoModeaddr, 2); |
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| 418 | VideoModeaddr += 2; |
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| 419 | if ((modec != -1) && (modec == mode)) { |
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| 420 | done = 1; |
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| 421 | } |
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| 422 | } while ((modec != -1) && (!done)); |
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| 423 | if (done == 1) return 1; |
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| 424 | return -1; |
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| 425 | } |
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| 426 | |||
| 427 | DWORD vbe_getmem(void) |
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| 428 | { |
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| 429 | return (VbeInfo.TotalMemory<<6) * 1024; |
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| 430 | } |