+++ /dev/null
-; Catacomb 3-D Source Code\r
-; Copyright (C) 1993-2014 Flat Rock Software\r
-;\r
-; This program is free software; you can redistribute it and/or modify\r
-; it under the terms of the GNU General Public License as published by\r
-; the Free Software Foundation; either version 2 of the License, or\r
-; (at your option) any later version.\r
-;\r
-; This program is distributed in the hope that it will be useful,\r
-; but WITHOUT ANY WARRANTY; without even the implied warranty of\r
-; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
-; GNU General Public License for more details.\r
-;\r
-; You should have received a copy of the GNU General Public License along\r
-; with this program; if not, write to the Free Software Foundation, Inc.,\r
-; 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.\r
-\r
-; ID_VW_A.ASM\r
-\r
-IDEAL\r
-MODEL MEDIUM,C\r
-\r
-INCLUDE "ID_ASM.EQU"\r
-\r
-WAITFORVBL = 1 ; setting to 0 causes setscreen and waitvbl\r
- ; to skip waiting for VBL (for timing things)\r
-\r
-;============================================================================\r
-\r
-DATASEG\r
-\r
-EXTRN screenseg :WORD\r
-EXTRN drawofs :WORD\r
-EXTRN bufferofs :WORD\r
-EXTRN displayofs :WORD\r
-EXTRN drawofs :WORD\r
-EXTRN panadjust :WORD\r
-EXTRN ylookup :WORD\r
-EXTRN linewidth :WORD\r
-EXTRN grsegs :WORD\r
-EXTRN updateptr :WORD\r
-EXTRN blockstarts :WORD ;offsets from drawofs for each update block\r
-EXTRN fontspace :WORD\r
-EXTRN fontnumber :WORD\r
-\r
-\r
-planemask db ?\r
-planenum db ?\r
-screendest dw ?\r
-linedelta dw ?\r
-\r
-LABEL shiftdata0 WORD\r
- dw 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13\r
- dw 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27\r
- dw 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41\r
- dw 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55\r
- dw 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69\r
- dw 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83\r
- dw 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97\r
- dw 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111\r
- dw 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125\r
- dw 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139\r
- dw 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153\r
- dw 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167\r
- dw 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181\r
- dw 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195\r
- dw 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209\r
- dw 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223\r
- dw 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237\r
- dw 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251\r
- dw 252, 253, 254, 255\r
-\r
-LABEL shiftdata1 WORD\r
- dw 0,32768, 1,32769, 2,32770, 3,32771, 4,32772, 5,32773, 6,32774\r
- dw 7,32775, 8,32776, 9,32777, 10,32778, 11,32779, 12,32780, 13,32781\r
- dw 14,32782, 15,32783, 16,32784, 17,32785, 18,32786, 19,32787, 20,32788\r
- dw 21,32789, 22,32790, 23,32791, 24,32792, 25,32793, 26,32794, 27,32795\r
- dw 28,32796, 29,32797, 30,32798, 31,32799, 32,32800, 33,32801, 34,32802\r
- dw 35,32803, 36,32804, 37,32805, 38,32806, 39,32807, 40,32808, 41,32809\r
- dw 42,32810, 43,32811, 44,32812, 45,32813, 46,32814, 47,32815, 48,32816\r
- dw 49,32817, 50,32818, 51,32819, 52,32820, 53,32821, 54,32822, 55,32823\r
- dw 56,32824, 57,32825, 58,32826, 59,32827, 60,32828, 61,32829, 62,32830\r
- dw 63,32831, 64,32832, 65,32833, 66,32834, 67,32835, 68,32836, 69,32837\r
- dw 70,32838, 71,32839, 72,32840, 73,32841, 74,32842, 75,32843, 76,32844\r
- dw 77,32845, 78,32846, 79,32847, 80,32848, 81,32849, 82,32850, 83,32851\r
- dw 84,32852, 85,32853, 86,32854, 87,32855, 88,32856, 89,32857, 90,32858\r
- dw 91,32859, 92,32860, 93,32861, 94,32862, 95,32863, 96,32864, 97,32865\r
- dw 98,32866, 99,32867, 100,32868, 101,32869, 102,32870, 103,32871, 104,32872\r
- dw 105,32873, 106,32874, 107,32875, 108,32876, 109,32877, 110,32878, 111,32879\r
- dw 112,32880, 113,32881, 114,32882, 115,32883, 116,32884, 117,32885, 118,32886\r
- dw 119,32887, 120,32888, 121,32889, 122,32890, 123,32891, 124,32892, 125,32893\r
- dw 126,32894, 127,32895\r
-\r
-LABEL shiftdata2 WORD\r
- dw 0,16384,32768,49152, 1,16385,32769,49153, 2,16386,32770,49154, 3,16387\r
- dw 32771,49155, 4,16388,32772,49156, 5,16389,32773,49157, 6,16390,32774,49158\r
- dw 7,16391,32775,49159, 8,16392,32776,49160, 9,16393,32777,49161, 10,16394\r
- dw 32778,49162, 11,16395,32779,49163, 12,16396,32780,49164, 13,16397,32781,49165\r
- dw 14,16398,32782,49166, 15,16399,32783,49167, 16,16400,32784,49168, 17,16401\r
- dw 32785,49169, 18,16402,32786,49170, 19,16403,32787,49171, 20,16404,32788,49172\r
- dw 21,16405,32789,49173, 22,16406,32790,49174, 23,16407,32791,49175, 24,16408\r
- dw 32792,49176, 25,16409,32793,49177, 26,16410,32794,49178, 27,16411,32795,49179\r
- dw 28,16412,32796,49180, 29,16413,32797,49181, 30,16414,32798,49182, 31,16415\r
- dw 32799,49183, 32,16416,32800,49184, 33,16417,32801,49185, 34,16418,32802,49186\r
- dw 35,16419,32803,49187, 36,16420,32804,49188, 37,16421,32805,49189, 38,16422\r
- dw 32806,49190, 39,16423,32807,49191, 40,16424,32808,49192, 41,16425,32809,49193\r
- dw 42,16426,32810,49194, 43,16427,32811,49195, 44,16428,32812,49196, 45,16429\r
- dw 32813,49197, 46,16430,32814,49198, 47,16431,32815,49199, 48,16432,32816,49200\r
- dw 49,16433,32817,49201, 50,16434,32818,49202, 51,16435,32819,49203, 52,16436\r
- dw 32820,49204, 53,16437,32821,49205, 54,16438,32822,49206, 55,16439,32823,49207\r
- dw 56,16440,32824,49208, 57,16441,32825,49209, 58,16442,32826,49210, 59,16443\r
- dw 32827,49211, 60,16444,32828,49212, 61,16445,32829,49213, 62,16446,32830,49214\r
- dw 63,16447,32831,49215\r
-\r
-LABEL shiftdata3 WORD\r
- dw 0, 8192,16384,24576,32768,40960,49152,57344, 1, 8193,16385,24577,32769,40961\r
- dw 49153,57345, 2, 8194,16386,24578,32770,40962,49154,57346, 3, 8195,16387,24579\r
- dw 32771,40963,49155,57347, 4, 8196,16388,24580,32772,40964,49156,57348, 5, 8197\r
- dw 16389,24581,32773,40965,49157,57349, 6, 8198,16390,24582,32774,40966,49158,57350\r
- dw 7, 8199,16391,24583,32775,40967,49159,57351, 8, 8200,16392,24584,32776,40968\r
- dw 49160,57352, 9, 8201,16393,24585,32777,40969,49161,57353, 10, 8202,16394,24586\r
- dw 32778,40970,49162,57354, 11, 8203,16395,24587,32779,40971,49163,57355, 12, 8204\r
- dw 16396,24588,32780,40972,49164,57356, 13, 8205,16397,24589,32781,40973,49165,57357\r
- dw 14, 8206,16398,24590,32782,40974,49166,57358, 15, 8207,16399,24591,32783,40975\r
- dw 49167,57359, 16, 8208,16400,24592,32784,40976,49168,57360, 17, 8209,16401,24593\r
- dw 32785,40977,49169,57361, 18, 8210,16402,24594,32786,40978,49170,57362, 19, 8211\r
- dw 16403,24595,32787,40979,49171,57363, 20, 8212,16404,24596,32788,40980,49172,57364\r
- dw 21, 8213,16405,24597,32789,40981,49173,57365, 22, 8214,16406,24598,32790,40982\r
- dw 49174,57366, 23, 8215,16407,24599,32791,40983,49175,57367, 24, 8216,16408,24600\r
- dw 32792,40984,49176,57368, 25, 8217,16409,24601,32793,40985,49177,57369, 26, 8218\r
- dw 16410,24602,32794,40986,49178,57370, 27, 8219,16411,24603,32795,40987,49179,57371\r
- dw 28, 8220,16412,24604,32796,40988,49180,57372, 29, 8221,16413,24605,32797,40989\r
- dw 49181,57373, 30, 8222,16414,24606,32798,40990,49182,57374, 31, 8223,16415,24607\r
- dw 32799,40991,49183,57375\r
-\r
-LABEL shiftdata4 WORD\r
- dw 0, 4096, 8192,12288,16384,20480,24576,28672,32768,36864,40960,45056,49152,53248\r
- dw 57344,61440, 1, 4097, 8193,12289,16385,20481,24577,28673,32769,36865,40961,45057\r
- dw 49153,53249,57345,61441, 2, 4098, 8194,12290,16386,20482,24578,28674,32770,36866\r
- dw 40962,45058,49154,53250,57346,61442, 3, 4099, 8195,12291,16387,20483,24579,28675\r
- dw 32771,36867,40963,45059,49155,53251,57347,61443, 4, 4100, 8196,12292,16388,20484\r
- dw 24580,28676,32772,36868,40964,45060,49156,53252,57348,61444, 5, 4101, 8197,12293\r
- dw 16389,20485,24581,28677,32773,36869,40965,45061,49157,53253,57349,61445, 6, 4102\r
- dw 8198,12294,16390,20486,24582,28678,32774,36870,40966,45062,49158,53254,57350,61446\r
- dw 7, 4103, 8199,12295,16391,20487,24583,28679,32775,36871,40967,45063,49159,53255\r
- dw 57351,61447, 8, 4104, 8200,12296,16392,20488,24584,28680,32776,36872,40968,45064\r
- dw 49160,53256,57352,61448, 9, 4105, 8201,12297,16393,20489,24585,28681,32777,36873\r
- dw 40969,45065,49161,53257,57353,61449, 10, 4106, 8202,12298,16394,20490,24586,28682\r
- dw 32778,36874,40970,45066,49162,53258,57354,61450, 11, 4107, 8203,12299,16395,20491\r
- dw 24587,28683,32779,36875,40971,45067,49163,53259,57355,61451, 12, 4108, 8204,12300\r
- dw 16396,20492,24588,28684,32780,36876,40972,45068,49164,53260,57356,61452, 13, 4109\r
- dw 8205,12301,16397,20493,24589,28685,32781,36877,40973,45069,49165,53261,57357,61453\r
- dw 14, 4110, 8206,12302,16398,20494,24590,28686,32782,36878,40974,45070,49166,53262\r
- dw 57358,61454, 15, 4111, 8207,12303,16399,20495,24591,28687,32783,36879,40975,45071\r
- dw 49167,53263,57359,61455\r
-\r
-LABEL shiftdata5 WORD\r
- dw 0, 2048, 4096, 6144, 8192,10240,12288,14336,16384,18432,20480,22528,24576,26624\r
- dw 28672,30720,32768,34816,36864,38912,40960,43008,45056,47104,49152,51200,53248,55296\r
- dw 57344,59392,61440,63488, 1, 2049, 4097, 6145, 8193,10241,12289,14337,16385,18433\r
- dw 20481,22529,24577,26625,28673,30721,32769,34817,36865,38913,40961,43009,45057,47105\r
- dw 49153,51201,53249,55297,57345,59393,61441,63489, 2, 2050, 4098, 6146, 8194,10242\r
- dw 12290,14338,16386,18434,20482,22530,24578,26626,28674,30722,32770,34818,36866,38914\r
- dw 40962,43010,45058,47106,49154,51202,53250,55298,57346,59394,61442,63490, 3, 2051\r
- dw 4099, 6147, 8195,10243,12291,14339,16387,18435,20483,22531,24579,26627,28675,30723\r
- dw 32771,34819,36867,38915,40963,43011,45059,47107,49155,51203,53251,55299,57347,59395\r
- dw 61443,63491, 4, 2052, 4100, 6148, 8196,10244,12292,14340,16388,18436,20484,22532\r
- dw 24580,26628,28676,30724,32772,34820,36868,38916,40964,43012,45060,47108,49156,51204\r
- dw 53252,55300,57348,59396,61444,63492, 5, 2053, 4101, 6149, 8197,10245,12293,14341\r
- dw 16389,18437,20485,22533,24581,26629,28677,30725,32773,34821,36869,38917,40965,43013\r
- dw 45061,47109,49157,51205,53253,55301,57349,59397,61445,63493, 6, 2054, 4102, 6150\r
- dw 8198,10246,12294,14342,16390,18438,20486,22534,24582,26630,28678,30726,32774,34822\r
- dw 36870,38918,40966,43014,45062,47110,49158,51206,53254,55302,57350,59398,61446,63494\r
- dw 7, 2055, 4103, 6151, 8199,10247,12295,14343,16391,18439,20487,22535,24583,26631\r
- dw 28679,30727,32775,34823,36871,38919,40967,43015,45063,47111,49159,51207,53255,55303\r
- dw 57351,59399,61447,63495\r
-\r
-LABEL shiftdata6 WORD\r
- dw 0, 1024, 2048, 3072, 4096, 5120, 6144, 7168, 8192, 9216,10240,11264,12288,13312\r
- dw 14336,15360,16384,17408,18432,19456,20480,21504,22528,23552,24576,25600,26624,27648\r
- dw 28672,29696,30720,31744,32768,33792,34816,35840,36864,37888,38912,39936,40960,41984\r
- dw 43008,44032,45056,46080,47104,48128,49152,50176,51200,52224,53248,54272,55296,56320\r
- dw 57344,58368,59392,60416,61440,62464,63488,64512, 1, 1025, 2049, 3073, 4097, 5121\r
- dw 6145, 7169, 8193, 9217,10241,11265,12289,13313,14337,15361,16385,17409,18433,19457\r
- dw 20481,21505,22529,23553,24577,25601,26625,27649,28673,29697,30721,31745,32769,33793\r
- dw 34817,35841,36865,37889,38913,39937,40961,41985,43009,44033,45057,46081,47105,48129\r
- dw 49153,50177,51201,52225,53249,54273,55297,56321,57345,58369,59393,60417,61441,62465\r
- dw 63489,64513, 2, 1026, 2050, 3074, 4098, 5122, 6146, 7170, 8194, 9218,10242,11266\r
- dw 12290,13314,14338,15362,16386,17410,18434,19458,20482,21506,22530,23554,24578,25602\r
- dw 26626,27650,28674,29698,30722,31746,32770,33794,34818,35842,36866,37890,38914,39938\r
- dw 40962,41986,43010,44034,45058,46082,47106,48130,49154,50178,51202,52226,53250,54274\r
- dw 55298,56322,57346,58370,59394,60418,61442,62466,63490,64514, 3, 1027, 2051, 3075\r
- dw 4099, 5123, 6147, 7171, 8195, 9219,10243,11267,12291,13315,14339,15363,16387,17411\r
- dw 18435,19459,20483,21507,22531,23555,24579,25603,26627,27651,28675,29699,30723,31747\r
- dw 32771,33795,34819,35843,36867,37891,38915,39939,40963,41987,43011,44035,45059,46083\r
- dw 47107,48131,49155,50179,51203,52227,53251,54275,55299,56323,57347,58371,59395,60419\r
- dw 61443,62467,63491,64515\r
-\r
-LABEL shiftdata7 WORD\r
- dw 0, 512, 1024, 1536, 2048, 2560, 3072, 3584, 4096, 4608, 5120, 5632, 6144, 6656\r
- dw 7168, 7680, 8192, 8704, 9216, 9728,10240,10752,11264,11776,12288,12800,13312,13824\r
- dw 14336,14848,15360,15872,16384,16896,17408,17920,18432,18944,19456,19968,20480,20992\r
- dw 21504,22016,22528,23040,23552,24064,24576,25088,25600,26112,26624,27136,27648,28160\r
- dw 28672,29184,29696,30208,30720,31232,31744,32256,32768,33280,33792,34304,34816,35328\r
- dw 35840,36352,36864,37376,37888,38400,38912,39424,39936,40448,40960,41472,41984,42496\r
- dw 43008,43520,44032,44544,45056,45568,46080,46592,47104,47616,48128,48640,49152,49664\r
- dw 50176,50688,51200,51712,52224,52736,53248,53760,54272,54784,55296,55808,56320,56832\r
- dw 57344,57856,58368,58880,59392,59904,60416,60928,61440,61952,62464,62976,63488,64000\r
- dw 64512,65024, 1, 513, 1025, 1537, 2049, 2561, 3073, 3585, 4097, 4609, 5121, 5633\r
- dw 6145, 6657, 7169, 7681, 8193, 8705, 9217, 9729,10241,10753,11265,11777,12289,12801\r
- dw 13313,13825,14337,14849,15361,15873,16385,16897,17409,17921,18433,18945,19457,19969\r
- dw 20481,20993,21505,22017,22529,23041,23553,24065,24577,25089,25601,26113,26625,27137\r
- dw 27649,28161,28673,29185,29697,30209,30721,31233,31745,32257,32769,33281,33793,34305\r
- dw 34817,35329,35841,36353,36865,37377,37889,38401,38913,39425,39937,40449,40961,41473\r
- dw 41985,42497,43009,43521,44033,44545,45057,45569,46081,46593,47105,47617,48129,48641\r
- dw 49153,49665,50177,50689,51201,51713,52225,52737,53249,53761,54273,54785,55297,55809\r
- dw 56321,56833,57345,57857,58369,58881,59393,59905,60417,60929,61441,61953,62465,62977\r
- dw 63489,64001,64513,65025\r
-\r
-shifttabletable dw shiftdata0,shiftdata1,shiftdata2,shiftdata3\r
- dw shiftdata4,shiftdata5,shiftdata6,shiftdata7\r
-\r
-PUBLIC shifttabletable\r
-\r
-\r
-;============================================================================\r
-\r
-CODESEG\r
-\r
-IFE GRMODE-CGAGR\r
-INCLUDE "ID_VW_AC.ASM"\r
-ENDIF\r
-\r
-IFE GRMODE-EGAGR\r
-INCLUDE "ID_VW_AE.ASM"\r
-ENDIF\r
-\r
-IFE GRMODE-VGAGR\r
-INCLUDE "ID_VW_AV.ASM"\r
-ENDIF\r
-\r
-;============================================================================\r
-;\r
-; MISC VIDEO ROUTINES\r
-;\r
-;============================================================================\r
-\r
-;========\r
-;\r
-; VW_WaitVBL (int number)\r
-;\r
-;========\r
-\r
-PROC VW_WaitVBL number:WORD\r
-PUBLIC VW_WaitVBL\r
-\r
-if WAITFORVBL ; skip wait if profiling\r
-\r
- mov dx,STATUS_REGISTER_1\r
-\r
- mov cx,[number]\r
-\r
-waitvbl1:\r
- in al,dx\r
- test al,00001000b ;look for vbl\r
- jnz waitvbl1\r
-\r
-waitvbl2:\r
- in al,dx\r
- test al,00001000b ;look for vbl\r
- jz waitvbl2\r
-\r
- loop waitvbl1\r
-\r
-endif\r
-\r
- ret\r
-\r
-ENDP\r
-\r
-\r
-;===========================================================================\r
-\r
-\r
- MASM\r
-;ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ\r
-;\r
-; Name: VW_VideoID\r
-;\r
-; Function: Detects the presence of various video subsystems\r
-;\r
-; int VideoID;\r
-;\r
-; Subsystem ID values:\r
-; 0 = (none)\r
-; 1 = MDA\r
-; 2 = CGA\r
-; 3 = EGA\r
-; 4 = MCGA\r
-; 5 = VGA\r
-; 80h = HGC\r
-; 81h = HGC+\r
-; 82h = Hercules InColor\r
-;\r
-;ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ\r
-\r
-;ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ\r
-;\r
-; Equates\r
-;\r
-;ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ\r
-VIDstruct STRUC ; corresponds to C data structure\r
-\r
-Video0Type DB ? ; first subsystem type\r
-Display0Type DB ? ; display attached to first subsystem\r
-\r
-Video1Type DB ? ; second subsystem type\r
-Display1Type DB ? ; display attached to second subsystem\r
-\r
-VIDstruct ENDS\r
-\r
-\r
-Device0 EQU word ptr Video0Type[di]\r
-Device1 EQU word ptr Video1Type[di]\r
-\r
-\r
-MDA EQU 1 ; subsystem types\r
-CGA EQU 2\r
-EGA EQU 3\r
-MCGA EQU 4\r
-VGA EQU 5\r
-HGC EQU 80h\r
-HGCPlus EQU 81h\r
-InColor EQU 82h\r
-\r
-MDADisplay EQU 1 ; display types\r
-CGADisplay EQU 2\r
-EGAColorDisplay EQU 3\r
-PS2MonoDisplay EQU 4\r
-PS2ColorDisplay EQU 5\r
-\r
-TRUE EQU 1\r
-FALSE EQU 0\r
-\r
-;ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ\r
-;\r
-; Program\r
-;\r
-;ÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ\r
-\r
-Results VIDstruct <> ;results go here!\r
-\r
-EGADisplays DB CGADisplay ; 0000b, 0001b (EGA switch values)\r
- DB EGAColorDisplay ; 0010b, 0011b\r
- DB MDADisplay ; 0100b, 0101b\r
- DB CGADisplay ; 0110b, 0111b\r
- DB EGAColorDisplay ; 1000b, 1001b\r
- DB MDADisplay ; 1010b, 1011b\r
-\r
-DCCtable DB 0,0 ; translate table for INT 10h func 1Ah\r
- DB MDA,MDADisplay\r
- DB CGA,CGADisplay\r
- DB 0,0\r
- DB EGA,EGAColorDisplay\r
- DB EGA,MDADisplay\r
- DB 0,0\r
- DB VGA,PS2MonoDisplay\r
- DB VGA,PS2ColorDisplay\r
- DB 0,0\r
- DB MCGA,EGAColorDisplay\r
- DB MCGA,PS2MonoDisplay\r
- DB MCGA,PS2ColorDisplay\r
-\r
-TestSequence DB TRUE ; this list of flags and addresses\r
- DW FindPS2 ; determines the order in which this\r
- ; program looks for the various\r
-EGAflag DB ? ; subsystems\r
- DW FindEGA\r
-\r
-CGAflag DB ?\r
- DW FindCGA\r
-\r
-Monoflag DB ?\r
- DW FindMono\r
-\r
-NumberOfTests EQU ($-TestSequence)/3\r
-\r
-\r
-PUBLIC VW_VideoID\r
-VW_VideoID PROC\r
-\r
- push bp ; preserve caller registers\r
- mov bp,sp\r
- push ds\r
- push si\r
- push di\r
-\r
- push cs\r
- pop ds\r
- ASSUME DS:@Code\r
-\r
-; initialize the data structure that will contain the results\r
-\r
- lea di,Results ; DS:DI -> start of data structure\r
-\r
- mov Device0,0 ; zero these variables\r
- mov Device1,0\r
-\r
-; look for the various subsystems using the subroutines whose addresses are\r
-; tabulated in TestSequence; each subroutine sets flags in TestSequence\r
-; to indicate whether subsequent subroutines need to be called\r
-\r
- mov byte ptr CGAflag,TRUE\r
- mov byte ptr EGAflag,TRUE\r
- mov byte ptr Monoflag,TRUE\r
-\r
- mov cx,NumberOfTests\r
- mov si,offset TestSequence\r
-\r
-@@L01: lodsb ; AL := flag\r
- test al,al\r
- lodsw ; AX := subroutine address\r
- jz @@L02 ; skip subroutine if flag is false\r
-\r
- push si\r
- push cx\r
- call ax ; call subroutine to detect subsystem\r
- pop cx\r
- pop si\r
-\r
-@@L02: loop @@L01\r
-\r
-; determine which subsystem is active\r
-\r
- call FindActive\r
-\r
- mov al,Results.Video0Type\r
- mov ah,0 ; was: Results.Display0Type\r
-\r
- pop di ; restore caller registers and return\r
- pop si\r
- pop ds\r
- mov sp,bp\r
- pop bp\r
- ret\r
-\r
-VW_VideoID ENDP\r
-\r
-\r
-;\r
-; FindPS2\r
-;\r
-; This subroutine uses INT 10H function 1Ah to determine the video BIOS\r
-; Display Combination Code (DCC) for each video subsystem present.\r
-;\r
-\r
-FindPS2 PROC near\r
-\r
- mov ax,1A00h\r
- int 10h ; call video BIOS for info\r
-\r
- cmp al,1Ah\r
- jne @@L13 ; exit if function not supported (i.e.,\r
- ; no MCGA or VGA in system)\r
-\r
-; convert BIOS DCCs into specific subsystems & displays\r
-\r
- mov cx,bx\r
- xor bh,bh ; BX := DCC for active subsystem\r
-\r
- or ch,ch\r
- jz @@L11 ; jump if only one subsystem present\r
-\r
- mov bl,ch ; BX := inactive DCC\r
- add bx,bx\r
- mov ax,[bx+offset DCCtable]\r
-\r
- mov Device1,ax\r
-\r
- mov bl,cl\r
- xor bh,bh ; BX := active DCC\r
-\r
-@@L11: add bx,bx\r
- mov ax,[bx+offset DCCtable]\r
-\r
- mov Device0,ax\r
-\r
-; reset flags for subsystems that have been ruled out\r
-\r
- mov byte ptr CGAflag,FALSE\r
- mov byte ptr EGAflag,FALSE\r
- mov byte ptr Monoflag,FALSE\r
-\r
- lea bx,Video0Type[di] ; if the BIOS reported an MDA ...\r
- cmp byte ptr [bx],MDA\r
- je @@L12\r
-\r
- lea bx,Video1Type[di]\r
- cmp byte ptr [bx],MDA\r
- jne @@L13\r
-\r
-@@L12: mov word ptr [bx],0 ; ... Hercules can't be ruled out\r
- mov byte ptr Monoflag,TRUE\r
-\r
-@@L13: ret\r
-\r
-FindPS2 ENDP\r
-\r
-\r
-;\r
-; FindEGA\r
-;\r
-; Look for an EGA. This is done by making a call to an EGA BIOS function\r
-; which doesn't exist in the default (MDA, CGA) BIOS.\r
-\r
-FindEGA PROC near ; Caller: AH = flags\r
- ; Returns: AH = flags\r
- ; Video0Type and\r
- ; Display0Type updated\r
-\r
- mov bl,10h ; BL := 10h (return EGA info)\r
- mov ah,12h ; AH := INT 10H function number\r
- int 10h ; call EGA BIOS for info\r
- ; if EGA BIOS is present,\r
- ; BL <> 10H\r
- ; CL = switch setting\r
- cmp bl,10h\r
- je @@L22 ; jump if EGA BIOS not present\r
-\r
- mov al,cl\r
- shr al,1 ; AL := switches/2\r
- mov bx,offset EGADisplays\r
- xlat ; determine display type from switches\r
- mov ah,al ; AH := display type\r
- mov al,EGA ; AL := subystem type\r
- call FoundDevice\r
-\r
- cmp ah,MDADisplay\r
- je @@L21 ; jump if EGA has a monochrome display\r
-\r
- mov CGAflag,FALSE ; no CGA if EGA has color display\r
- jmp short @@L22\r
-\r
-@@L21: mov Monoflag,FALSE ; EGA has a mono display, so MDA and\r
- ; Hercules are ruled out\r
-@@L22: ret\r
-\r
-FindEGA ENDP\r
-\r
-;\r
-; FindCGA\r
-;\r
-; This is done by looking for the CGA's 6845 CRTC at I/O port 3D4H.\r
-;\r
-FindCGA PROC near ; Returns: VIDstruct updated\r
-\r
- mov dx,3D4h ; DX := CRTC address port\r
- call Find6845\r
- jc @@L31 ; jump if not present\r
-\r
- mov al,CGA\r
- mov ah,CGADisplay\r
- call FoundDevice\r
-\r
-@@L31: ret\r
-\r
-FindCGA ENDP\r
-\r
-;\r
-; FindMono\r
-;\r
-; This is done by looking for the MDA's 6845 CRTC at I/O port 3B4H. If\r
-; a 6845 is found, the subroutine distinguishes between an MDA\r
-; and a Hercules adapter by monitoring bit 7 of the CRT Status byte.\r
-; This bit changes on Hercules adapters but does not change on an MDA.\r
-;\r
-; The various Hercules adapters are identified by bits 4 through 6 of\r
-; the CRT Status value:\r
-;\r
-; 000b = HGC\r
-; 001b = HGC+\r
-; 101b = InColor card\r
-;\r
-\r
-FindMono PROC near ; Returns: VIDstruct updated\r
-\r
- mov dx,3B4h ; DX := CRTC address port\r
- call Find6845\r
- jc @@L44 ; jump if not present\r
-\r
- mov dl,0BAh ; DX := 3BAh (status port)\r
- in al,dx\r
- and al,80h\r
- mov ah,al ; AH := bit 7 (vertical sync on HGC)\r
-\r
- mov cx,8000h ; do this 32768 times\r
-@@L41: in al,dx\r
- and al,80h ; isolate bit 7\r
- cmp ah,al\r
- loope @@L41 ; wait for bit 7 to change\r
- jne @@L42 ; if bit 7 changed, it's a Hercules\r
-\r
- mov al,MDA ; if bit 7 didn't change, it's an MDA\r
- mov ah,MDADisplay\r
- call FoundDevice\r
- jmp short @@L44\r
-\r
-@@L42: in al,dx\r
- mov dl,al ; DL := value from status port\r
- and dl,01110000b ; mask bits 4 thru 6\r
-\r
- mov ah,MDADisplay ; assume it's a monochrome display\r
-\r
- mov al,HGCPlus ; look for an HGC+\r
- cmp dl,00010000b\r
- je @@L43 ; jump if it's an HGC+\r
-\r
- mov al,HGC ; look for an InColor card or HGC\r
- cmp dl,01010000b\r
- jne @@L43 ; jump if it's not an InColor card\r
-\r
- mov al,InColor ; it's an InColor card\r
- mov ah,EGAColorDisplay\r
-\r
-@@L43: call FoundDevice\r
-\r
-@@L44: ret\r
-\r
-FindMono ENDP\r
-\r
-;\r
-; Find6845\r
-;\r
-; This routine detects the presence of the CRTC on a MDA, CGA or HGC.\r
-; The technique is to write and read register 0Fh of the chip (cursor\r
-; low). If the same value is read as written, assume the chip is\r
-; present at the specified port addr.\r
-;\r
-\r
-Find6845 PROC near ; Caller: DX = port addr\r
- ; Returns: cf set if not present\r
- mov al,0Fh\r
- out dx,al ; select 6845 reg 0Fh (Cursor Low)\r
- inc dx\r
- in al,dx ; AL := current Cursor Low value\r
- mov ah,al ; preserve in AH\r
- mov al,66h ; AL := arbitrary value\r
- out dx,al ; try to write to 6845\r
-\r
- mov cx,100h\r
-@@L51: loop @@L51 ; wait for 6845 to respond\r
-\r
- in al,dx\r
- xchg ah,al ; AH := returned value\r
- ; AL := original value\r
- out dx,al ; restore original value\r
-\r
- cmp ah,66h ; test whether 6845 responded\r
- je @@L52 ; jump if it did (cf is reset)\r
-\r
- stc ; set carry flag if no 6845 present\r
-\r
-@@L52: ret\r
-\r
-Find6845 ENDP\r
-\r
-\r
-;\r
-; FindActive\r
-;\r
-; This subroutine stores the currently active device as Device0. The\r
-; current video mode determines which subsystem is active.\r
-;\r
-\r
-FindActive PROC near\r
-\r
- cmp word ptr Device1,0\r
- je @@L63 ; exit if only one subsystem\r
-\r
- cmp Video0Type[di],4 ; exit if MCGA or VGA present\r
- jge @@L63 ; (INT 10H function 1AH\r
- cmp Video1Type[di],4 ; already did the work)\r
- jge @@L63\r
-\r
- mov ah,0Fh\r
- int 10h ; AL := current BIOS video mode\r
-\r
- and al,7\r
- cmp al,7 ; jump if monochrome\r
- je @@L61 ; (mode 7 or 0Fh)\r
-\r
- cmp Display0Type[di],MDADisplay\r
- jne @@L63 ; exit if Display0 is color\r
- jmp short @@L62\r
-\r
-@@L61: cmp Display0Type[di],MDADisplay\r
- je @@L63 ; exit if Display0 is monochrome\r
-\r
-@@L62: mov ax,Device0 ; make Device0 currently active\r
- xchg ax,Device1\r
- mov Device0,ax\r
-\r
-@@L63: ret\r
-\r
-FindActive ENDP\r
-\r
-\r
-;\r
-; FoundDevice\r
-;\r
-; This routine updates the list of subsystems.\r
-;\r
-\r
-FoundDevice PROC near ; Caller: AH = display #\r
- ; AL = subsystem #\r
- ; Destroys: BX\r
- lea bx,Video0Type[di]\r
- cmp byte ptr [bx],0\r
- je @@L71 ; jump if 1st subsystem\r
-\r
- lea bx,Video1Type[di] ; must be 2nd subsystem\r
-\r
-@@L71: mov [bx],ax ; update list entry\r
- ret\r
-\r
-FoundDevice ENDP\r
-\r
-IDEAL\r
-\r
-\r
-\r
-END\r
projects / 16.git / blobdiff