Hỏi về truy cập ROM 4mb 29sf040

[ngocdq]

Chào các mod, qua hướng dẫn của các bạn mình đã tập tọe làm được một chút đề tài của mình, tuy nhiên mình còn vướng một số cái, xin nhờ các mod giúp mình solve nó :
- Chương trình của mình phải dùng đến cơ sở dữ liệu, và mình đã làm tốt với nó khi dư liệu chưa mở rộng (để test), với dung lượng khoảng 15- 20k (dùng con 89C55 là được). Tuy nhiên, thực tế đề tài của mình phải làm việc với dữ liệu khoảng trên dưới 3MB, vì thế mình phải làm việc với ROM ngoài là con 29sf040 (4M). Nhưng đến đây mình thực sự gặp trục trặc :
+ Khi mình nạp tất cả chương trình và dữ liệu vào ROM và để vi xử lý (89c52) hoạt động với chế độ bộ nhớ chương trình ngoài (nối chân 31 với VCC), nó không chạy. --> ứ hiểu tại sao

+ Mình định chuyển phương án : chương trình nạp vào VXL, còn dữ liệu nạp vào ROM, và khi thực hiện thuật toán phải thao tác thêm một số bước để đọc dữ liệu từ ROM vào. Tuy nhiên đến đây mình cũng gặp khó khăn tiếp đó là : Địa chỉ để đọc dữ liệu chỉ có 2 byte (từ A0 đến A16), làm sao để đọc được dữ liệu lên đến 4MB??.
Mình thực sự bị luẩn quẩn chỗ này, Vì mình cũng chỉ mới bắt đầu học lập trình VXL thôi, nên còn nhiều non nớt, mong các mod giúp mình với nhá...

Dữ liệu làm cho mình cầu sử dụng ROM có dụng lượng lớn như sau:

const int code Vung1_Data[0X1606] = {
//Toa do tai (0,0):
//Vi do:         6410464 
//106           do            50.464        phut  N

//Kinh do:       1247356 
//20            do            47.356        phut  E
//x             y1            y2

1094,
1091,1098,
1088,1101,
1086,1105,
1083,1108,
1080,1112,
1077,1115,
1074,1119,
1071,1122,
1069,1126,
1066,1130,
1063,1133,
1060,1137,
1057,1140,
1055,1144,
1052,1147,
1049,1151,
1046,1154,
1043,1158,
1040,1162,
1038,1165,
1035,1169,
1032,1172,
1029,1176,
1026,1179,
1024,1183,
1021,1186,
1018,1190,
1015,1194,
1012,1197,
1009,1201,
1007,1204,
1004,1208,
1001,1211,
998,1215,
995,1218,
993,1222,
990,1226,
987,1229,
984,1233,
981,1236,
978,1240,
976,1243,
973,1247,
970,1250,
967,1254,
964,1258,
962,1261,
959,1265,
956,1268,
953,1272,
950,1275,
947,1279,
945,1282,
942,1286,
939,1290,
936,1293,
933,1297,
931,1300,
928,1304,
925,1307,
922,1311,
919,1314,
917,1318,
914,1322,
911,1325,
908,1329,
905,1332,
902,1336,
900,1339,
897,1343,
894,1346,
891,1350,
888,1354,
886,1357,
883,1361,
880,1364,
877,1368,
874,1371,
871,1375,
869,1378,
866,1382,
863,1386,
860,1389,
857,1393,
855,1396,
852,1400,
849,1403,
846,1407,
843,1410,
840,1414,
838,1418,
835,1421,
832,1425,
829,1428,
826,1432,
824,1435,
821,1439,
818,1442,
815,1446,
812,1450,
809,1453,
807,1457,
804,1460,
801,1464,
798,1467,
795,1471,
793,1474,
790,1478,
787,1482,
784,1485,
781,1489,
778,1492,
776,1496,
773,1499,
770,1503,
767,1506,
764,1510,
762,1514,
759,1517,
756,1521,
753,1524,
750,1528,
747,1531,
745,1535,
742,1538,
739,1542,
736,1546,
733,1549,
731,1553,
728,1556,
725,1560,
722,1563,
719,1567,
716,1570,
714,1574,
711,1578,
708,1581,
705,1585,
702,1588,
700,1592,
697,1595,
694,1599,
691,1602,
688,1606,
685,1610,
683,1613,
680,1617,
677,1620,
674,1624,
671,1627,
669,1631,
666,1634,
663,1638,
660,1642,
657,1645,
654,1649,
652,1652,
649,1656,
646,1659,
643,1663,
640,1666,
638,1670,
635,1674,
632,1677,
629,1681,
626,1684,
623,1688,
621,1691,
618,1695,
615,1698,
612,1702,
609,1706,
607,1709,
604,1713,
601,1716,
598,1720,
595,1723,
592,1727,
590,1730,
587,1734,
584,1738,2492,
581,2492,1741,2495,
578,2492,1745,2497,
576,2492,1748,2500,
573,2492,1752,2503,
570,2491,1755,2505,
567,2491,1759,2508,
564,2491,1762,2510,
562,2491,1766,2513,
559,2491,1770,2516,
556,2491,1773,2518,
553,2491,1777,2521,
550,2491,1780,2524,
547,2491,1784,2526,
545,2491,1787,2529,
542,2490,1791,2532,
539,2490,1794,2534,
536,2490,1798,2537,
533,2490,1802,2540,
531,2490,1805,2542,
528,2490,1809,2545,
525,2490,1812,2547,
522,2490,1816,2550,
519,2490,1819,2553,
516,2489,1823,2555,
514,2489,1826,2558,
511,2489,1830,2561,
508,2489,1834,2563,
505,2489,1837,2566,
502,2489,1841,2569,
500,2489,1844,2571,
497,2489,1848,2574,
494,2489,1851,2577,
491,2488,1855,2579,
488,2488,1858,2582,
485,2488,1862,2584,
483,2488,1866,2587,
480,2488,1869,2590,
477,2488,1873,2592,
474,2488,1876,2595,
471,2488,1880,2598,
469,2488,1883,2600,
466,2488,1887,2603,
463,2487,1890,2606,
460,2487,1894,2608,
457,2487,1898,2611,
454,2487,1901,2613,
452,2487,1905,2616,
449,2487,1908,2619,
446,2487,1912,2621,
443,2487,1915,2624,
440,2487,1919,2627,
438,2486,1922,2629,
435,2486,1926,2632,
432,2486,1930,2635,
429,2486,1933,2637,
426,2486,1937,2640,
423,2486,1940,2643,
421,2486,1944,2645,
418,2486,1947,2648,
415,2486,1951,2650,
415,2485,1954,2653,
415,2485,1958,2656,
414,2485,1962,2658,
414,2485,1965,2661,
414,2485,1969,2664,
414,2485,1972,2666,
413,2485,1976,2669,
413,2485,1979,2672,
413,2485,1983,2674,
413,2485,1986,2677,
412,2484,1990,2680,
412,2484,1994,2682,
412,2484,1997,2685,
412,2484,2001,2687,
411,2484,2004,2690,
411,2484,2008,2693,
411,2484,2011,2695,
411,2484,2015,2698,
410,2484,2018,2701,
410,2483,2022,2703,
410,2483,2026,2706,
410,2483,2029,2709,
410,2483,2033,2711,
409,2483,2036,2714,
409,2483,2040,2717,
409,2483,2043,2719,
409,2483,2047,2722,
408,2483,2050,2724,
408,2482,2054,2727,
408,2482,2058,2730,
408,2482,2061,2732,
407,2482,2065,2735,
407,2482,2068,2738,
407,2482,2072,2740,
407,2482,2075,2743,
406,2482,2079,2746,
406,2482,2082,2748,
406,2482,2086,2751,
406,2481,2090,2753,
405,2481,2093,2756,
405,2481,2097,2759,
405,2481,2100,2761,
405,2481,2104,2764,
404,2481,2107,2767,
404,2481,2111,2769,
404,2481,2114,2772,
404,2481,2118,2775,
404,2480,2122,2777,
403,2480,2125,2780,
403,2480,2129,2783,
403,2480,2132,2785,
403,2480,2136,2788,
402,2480,2139,2790,
402,2480,2143,2793,
402,2480,2146,2796,
402,2480,2150,2798,
401,2480,2154,2801,
401,2479,2157,2804,
401,2479,2161,2806,
401,2479,2164,2809,
400,2479,2168,2812,
400,2479,2171,2814,
400,2479,2175,2817,
400,2479,2178,2820,
399,2479,2182,2822,
399,2479,2186,2825,
399,2478,2189,2827,
399,2478,2193,2830,
399,2478,2196,2833,
398,2478,2200,2835,
398,2478,2203,2838,
398,2478,2207,2841,
398,2478,2210,2843,
397,2478,2214,2846,
397,2478,2218,2849,
397,2477,2221,2851,
397,2477,2225,2854,
396,2477,2228,2856,
396,2477,2232,2859,
396,2477,2235,2862,
396,2477,2239,2864,
395,2477,2242,2867,
395,2477,2246,2870,
395,2477,2250,2872,
395,2477,2253,2875,
394,2476,2257,2878,
394,2476,2260,2880,
394,2476,2264,2883,
394,2476,2267,2886,
393,2476,2271,2888,
393,2476,2274,2891,
393,2476,2278,2893,
393,2476,2282,2896,
393,2476,2285,2899,
392,2475,2289,2901,
392,2475,2292,2904,
392,2475,2296,2907,
392,2475,2299,2909,
391,2475,2303,2912,
391,2475,2306,2915,
391,2475,2310,2917,
391,2475,2314,2920,
390,2475,2317,2923,
390,2474,2321,2925,
390,2474,2324,2928,
390,2474,2328,2930,
389,2474,2331,2933,
389,2474,2335,2936,
389,2474,2338,2938,
389,2474,2342,2941,
388,2474,2346,2944,
388,2474,2349,2946,
388,2474,2353,2949,
388,2473,2356,2952,
388,2473,2360,2954,
387,2473,2363,2957,
387,2473,2367,2960,
387,2473,2370,2962,
387,2473,2374,2965,
386,2473,2378,2967,
386,2473,2381,2970,
386,2473,2385,2973,
386,2472,2388,2975,
385,2472,2392,2978,
385,2472,2395,2981,
385,2472,2399,2983,
385,2472,2402,2986,
384,2472,2406,2989,
384,2472,2410,2991,
384,2472,2413,2994,
384,2472,2417,2996,
383,2471,2420,2999,
383,2471,2424,3002,
383,2471,2427,3004,
383,2471,2431,3007,
382,2471,2434,3010,
382,2471,2438,3012,
382,2471,2442,3015,
382,2471,2445,3018,
382,2471,2449,3020,
381,2471,2452,3023,
381,2470,2456,3026,
381,2470,2459,3028,
381,2470,2463,3031,
380,2470,2466,3033,
380,2470,3036,
380,3039,
380,3041,
379,3044,
379,3047,
379,3049,
379,3052,
378,3055,
378,3057,
378,3060,
378,3063,
377,3065,
377,3068,
377,3070,
377,3073,
377,3076,
376,3078,
376,3081,
376,3084,
376,3086,
375,3089,
375,3092,
375,3094,
375,3097,
374,3099,
374,3102,
374,3105,
374,3107,
373,3110,
373,3113,
373,3115,
373,3118,
372,3121,
372,3123,
372,3126,
372,3129,
371,3131,
371,3134,
371,3136,
371,3139,
371,3142,
370,3144,
370,3147,
370,3150,
370,3152,
369,3155,
369,3158,
369,3160,
369,3163,
368,3166,
368,3168,
368,3171,
368,3173,
367,3176,
367,3179,
367,3181,
367,3184,
366,3187,
366,3189,
366,3192,
366,3195,
366,3197,
365,3200,
365,3203,
365,3205,
365,3208,
364,3210,
364,3213,
364,3216,
364,3218,
363,3221,
363,3224,
363,3226,
363,3229,
362,3232,
362,3234,
362,3237,
362,3239,
361,3242,
361,3245,
361,3247,
361,3250,
360,3253,
360,3255,
360,3258,
360,3261,
360,3263,
359,3266,
359,3269,
359,3271,
359,3274,
358,3276,
358,3279,
358,3282,
358,3284,
357,3287,
357,3290,
357,3292,
357,3295,
356,3298,
356,3300,
356,3303,
356,3306,
355,3308,
355,3311,
355,3313,
355,3316,
355,3319,
354,3321,
354,3324,
354,3327,
354,3329,
353,3332,
353,3335,
353,3337,
353,3340,
352,3342,
352,3345,
352,3348,
352,3350,
351,3353,
351,3356,
351,3358,
351,3361,
350,3364,
350,3366,
350,3369,
350,3372,
349,3374,
349,3377,
349,3379,
349,3382,
349,3385,
348,3387,
348,3390,
348,3393,
348,3395,
347,3398,
347,3401,
347,3403,
347,3406,
346,3409,
346,3411,
346,3414,
346,3416,
345,3419,
345,3422,
345,3424,
345,3427,
344,3430,
344,3432,
344,3435,
344,3438,
344,3440,
343,3443,
343,3446,
343,3448,
343,3451,
342,3453,
342,3456,
342,3459,
342,3461,
341,3464,
341,3467,
341,3469,
341,3472,
340,3475,
340,3477,
340,3480,
340,3482,
339,3485,
339,3488,
339,3490,
339,3493,
338,3496,
338,3498,
338,3501,
338,3504,
338,3506,
337,3509,
337,3512,
337,3514,
337,3517,
336,3519,
336,3522,
336,3525,
336,3527,
335,3530,
335,3533,
335,3535,
335,3538,
334,3541,
334,3543,
334,3546,
334,3549,
333,3551,
333,3554,
333,3556,
333,3559,
333,3562,
332,3564,
332,3567,
332,3570,
332,3572,
331,3575,
331,3578,
331,3580,
331,3583,
330,3585,
330,3588,
330,3591,
330,3593,
329,3596,
329,3599,
329,3601,
329,3604,
328,3607,
328,3609,
328,3612,
328,3615,
327,3617,
327,3620,
327,3622,
327,3625,
327,3628,
326,3630,
326,3633,
326,3636,
326,3638,
325,3641,
325,3644,
325,3646,
325,3649,
324,3652,
324,3654,
324,3657,
324,3659,
323,3662,
323,3665,
323,3667,
323,3670,
322,3673,
322,3675,
322,3678,
322,3681,
322,3683,
321,3686,
321,3689,
321,3691,
321,3694,
320,3696,
320,3699,
320,3702,
320,3704,
319,3707,
319,3710,
319,3712,
319,3715,
318,3718,
318,3720,
318,3723,
318,3725,
317,3728,
317,3731,
317,3733,
317,3736,
316,3739,
316,3741,
316,3744,
316,3747,
316,3749,
315,3752,
315,3755,
315,3757,
315,3760,
314,3762,
314,3765,
314,3768,
314,3770,
313,3773,
313,3776,
313,3778,
313,3781,
312,3784,
312,3786,
312,3789,
312,3792,
311,3794,
311,3797,
311,3799,
311,3802,
311,3805,
310,3807,
310,3810,
310,3810,
310,3810,
309,3810,
309,3810,
309,3810,
309,3810,
308,3810,
308,3810,
308,3810,
308,3810,
307,3810,
307,3810,
307,3810,
307,3810,
306,3810,
306,3810,
306,3810,
306,3810,
306,3810,
305,3810,
305,3810,
305,3810,
305,3810,
304,3810,
304,3810,
304,3810,
304,3810,
303,3810,
303,3810,
303,3810,
303,3810,
302,3810,
302,3810,
302,3810,
302,3810,
301,3810,
301,3810,
301,3810,
301,3809,
300,3809,
300,3809,
300,3809,
300,3809,
300,3809,
299,3809,
299,3809,
299,3809,
299,3809,
298,3809,
298,3809,
298,3809,
298,3809,
297,3809,
297,3809,
297,3809,
297,3809,
296,3809,
296,3809,
296,3809,
296,3809,
295,3809,
295,3809,
295,3809,
295,3809,
295,3809,
294,3809,
294,3809,
294,3809,
294,3809,
293,3809,
293,3809,
293,3809,
293,3809,
292,3809,
292,3809,
292,3809,
292,3809,
291,3809,
291,3809,
291,3809,
291,3809,
290,3809,
290,3809,
290,3809,
290,3809,
289,3809,
289,3809,
289,3809,
289,3809,
289,3809,
288,3809,
288,3809,
288,3809,
288,3809,
287,3809,
287,3809,
287,3809,
287,3809,
286,3809,
286,3809,
286,3809,
286,3809,
285,3809,
285,3809,
285,3809,
285,3809,
284,3809,
284,3809,
284,3809,
284,3809,
284,3809,
283,3809,
283,3809,
283,3808,
283,3808,
282,3808,
282,3808,
282,3808,
282,3808,
281,3808,
281,3808,
281,3808,
281,3808,
280,3808,
280,3808,
280,3808,
280,3808,
279,3808,
279,3808,
279,3808,
279,3808,
278,3808,
278,3808,
278,3808,
278,3808,
278,3808,
277,3808,
277,3808,
277,3808,
277,3808,
276,3808,
276,3808,
276,3808,
276,3808,
275,3808,
275,3808,
275,3808,
275,3808,
274,3808,
274,3808,
274,3808,
274,3808,
273,3808,
273,3808,
273,3808,
273,3808,
273,3808,
272,3808,
272,3808,
272,3808,
272,3808,
271,3808,
271,3808,
271,3808,
271,3808,
270,3808,
270,3808,
270,3808,
270,3808,
269,3808,
269,3808,
269,3808,
269,3808,
268,3808,
268,3808,
268,3808,
268,3808,
267,3808,
267,3808,
267,3808,
267,3808,
267,3808,
266,3808,
266,3808,
266,3808,
266,3808,
265,3808,
265,3808,
265,3808,
265,3808,
264,3807,
264,3807,
264,3807,
264,3807,
263,3807,
263,3807,
263,3807,
263,3807,
262,3807,
262,3807,
262,3807,
262,3807,
262,3807,
261,3807,
261,3807,
261,3807,
261,3807,
260,3807,
260,3807,
260,3807,
260,3807,
259,3807,
259,3807,
259,3807,
259,3807,
258,3807,
258,3807,
258,3807,
258,3807,
257,3807,
257,3807,
257,3807,
257,3807,
256,3807,
256,3465,3807,
256,3464,3469,3807,
256,3464,3474,3807,
256,3463,3478,3807,
255,3462,3482,3807,
255,3461,3487,3807,
255,3461,3491,3807,
255,3460,3495,3807,
254,3459,3500,3807,
254,3459,3504,3807,
254,3458,3508,3807,
254,3457,3512,3807,
253,3456,3517,3807,
253,3456,3521,3807,
253,3455,3525,3807,
253,3454,3530,3807,
252,3454,3534,3807,
252,3453,3538,3807,
252,3452,3543,3807,
252,3451,3547,3807,
251,3451,3551,3807,
251,3450,3556,3807,
251,3449,3560,3807,
251,3449,3564,3807,
251,3448,3569,3807,
250,3447,3573,3807,
250,3446,3577,3807,
250,3446,3582,3807,
250,3445,3586,3807,
249,3444,3590,3807,
249,3444,3594,3807,
249,3443,3599,3807,
249,3442,3603,3807,
248,3442,3607,3807,
248,3441,3612,3807,
248,3440,3616,3807,
248,3439,3620,3807,
247,3439,3625,3807,
247,3438,3629,3807,
247,3437,3633,3807,
247,3437,3638,3807,
246,3436,3642,3806,
246,3435,3646,3806,
246,3434,3651,3806,
246,3434,3655,3806,
245,3433,3659,3806,
245,3432,3664,3806,
245,3432,3668,3806,
245,3431,3672,3806,
245,3430,3677,3806,
244,3429,3681,3806,
244,3429,3685,3806,
244,3428,3689,3806,
244,3427,3694,3806,
243,3427,3698,3806,
243,3426,3702,3806,
243,3425,3707,3806,
243,3424,3711,3806,
242,3424,3715,3806,
242,3423,3720,3806,
242,3422,3724,3806,
242,3422,3728,3806,
241,3421,3733,3806,
241,3420,3737,3806,
241,3419,3741,3806,
241,3419,3746,3806,
240,3418,3750,3806,
240,3417,3754,3806,
240,3417,3759,3806,
240,3416,3763,3806,
240,3415,3767,3806,
239,3414,3771,3806,
239,3414,3776,3806,
239,3413,3780,3806,
239,3412,3784,3806,
238,3412,3789,3806,
238,3411,3793,3806,
238,3410,3797,3806,
238,3409,3802,3806,
237,3409,3806,
237,3408,
237,3407,
237,3407,
236,3406,
236,3405,
236,3404,
236,3404,
235,3403,
235,3402,
235,3402,
235,3401,
234,3400,
234,3400,
234,3399,
234,3398,
234,3397,
233,3397,
233,3396,
233,3395,
233,3395,
232,3394,
232,3393,
232,3392,
232,3392,
231,3391,
231,3390,
231,3390,
231,3389,
230,3388,
230,3387,
230,3387,
230,3386,
229,3385,
229,3385,
229,3384,
229,3383,
229,3382,
228,3382,
228,3381,
228,3380,
228,3380,
227,3379,
227,3378,
227,3377,
227,3377,
226,3376,
226,3375,
226,3375,
226,3374,
225,3373,
225,3372,
225,3372,
225,3371,
224,3370,
224,3370,
224,3369,
224,3368,
223,3367,
223,3367,
223,3366,
223,3365,
223,3365,
222,3364,
222,3363,
222,3362,
222,3362,
221,3361,
221,3360,
221,3360,
221,3359,
220,3358,
220,3357,
220,3357,
220,3356,
219,3355,
219,3355,
219,3354,
219,3353,
218,3353,
218,3352,
218,3351,
218,3350,
218,3350,
217,3349,
217,3348,
217,3348,
217,3347,
216,3346,
216,3345,
216,3345,
216,3344,
215,3343,
215,3343,
215,3342,
215,3341,
214,3340,
214,3340,
214,3339,
214,3338,
213,3338,
213,3337,
213,3336,
213,3335,
212,3335,
212,3334,
212,3333,
212,3333,
212,3332,
211,3331,
211,3330,
211,3330,
211,3329,
210,3328,
210,3328,
210,3327,
210,3326,
209,3325,
209,3325,
209,3324,
209,3323,
208,3323,
208,3322,
208,3321,
208,3320,
207,3320,
207,3319,
207,3318,
207,3318,
207,3317,
206,3316,
206,3315,
206,3315,
206,3314,
205,3313,
205,3313,
205,3312,
205,3311,
204,3311,
204,3310,
204,3309,
204,3195,3308,
203,3195,3199,3308,
203,3195,3203,3307,
203,3194,3208,3306,
203,3194,3212,3306,
202,3194,3216,3305,
202,3194,3220,3304,
202,3193,3225,3303,
202,3193,3229,3303,
201,3193,3233,3302,
201,3193,3237,3301,
201,3192,3241,3301,
201,3192,3246,3300,
201,3192,3250,3299,
200,3192,3254,3298,
200,3191,3258,3298,
200,3191,3262,3297,
200,3191,3267,3296,
199,3191,3271,3296,
199,3190,3275,3295,
199,3190,3279,3294,
199,3190,3284,3293,
198,3190,3288,3293,
198,3189,3292,
198,3189,
198,3189,
197,3189,
197,3188,
197,3188,
197,3188,
196,3188,
196,3187,
196,3187,
196,3187,
196,3187,
195,3186,
195,3186,
195,3186,
195,3186,
194,3185,
194,3185,
194,3185,
194,3185,
193,3184,
193,3184,
193,3184,
193,3184,
192,3183,
192,3183,
192,3183,
192,3183,
191,3182,
191,3182,
191,3182,
191,3182,
191,3181,
190,3181,
190,3181,
190,3181,
190,3180,
189,3180,
189,3180,
189,3180,
189,3179,
188,3179,
188,3179,
188,3179,
188,3178,
187,3178,
187,3178,
187,3178,
187,3177,
186,3177,
186,3177,
186,3177,
186,3176,
185,3176,
185,3176,
185,3176,
185,3175,
185,3175,
184,3175,
184,3175,
184,3174,
184,3174,
183,3174,
183,3174,
183,3173,
183,3173,
182,3173,
182,3173,
182,3172,
182,3172,
181,3172,
181,3172,
181,3171,
181,3171,
180,3171,
180,3171,
180,3170,
180,3170,
180,3170,
179,3170,
179,3169,
179,3169,
179,3169,
178,3169,
178,3168,
178,3168,
178,3168,
177,3168,
177,3167,
177,3167,
177,3167,
176,3167,
176,3166,
176,3166,
176,3166,
175,3166,
175,3165,
175,3165,
175,3165,
174,3165,
174,3164,
174,3164,
174,3164,
174,3164,
173,3164,
173,3163,
173,3163,
173,3163,
172,3163,
172,3162,
172,3162,
172,3162,
171,3162,
171,3161,
171,3161,
171,3161,
170,3161,
170,3160,
170,3160,
170,3160,
169,3160,
169,3159,
169,3159,
169,3159,
169,3159,
168,3158,
168,3158,
168,3158,
168,3158,
167,3157,
167,3157,
167,3157,
167,3157,
166,3156,
166,3156,
166,3156,
166,3156,
165,3155,
165,3155,
165,3155,
165,3155,
164,3154,
164,3154,
164,3154,
164,3154,
163,3153,
163,3153,
163,3153,
163,3153,
163,3152,
162,3152,
162,3152,
162,3152,
162,3151,
161,3151,
161,3151,
161,3151,
161,3150,
160,3150,
160,3150,
160,3150,
160,3149,
159,3149,
159,3149,
159,3149,
159,3148,
158,3148,
158,3148,
158,3148,
158,3147,
158,3147,
157,3147,
157,3147,
157,3146,
157,3146,
156,3146,
156,3146,
156,3145,
156,3145,
155,3145,
155,3145,
155,3144,
155,3144,
154,3144,
154,3144,
154,3143,
154,3143,
153,3143,
153,3143,
153,3142,
153,3142,
152,3142,
152,3142,
152,3141,
152,3141,
152,3141,
151,3141,
151,3140,
151,3140,
151,3140,
150,3140,
150,3139,
150,3139,
150,3139,
149,3139,
149,3138,
149,3138,
149,3138,
148,3138,
148,3137,
148,3137,
148,3137,
147,3137,
147,3136,
147,3136,
147,3136,
147,3136,
146,3135,
146,3135,
146,3135,
146,3135,
145,3134,
145,3134,
145,3134,
145,3133,
144,3132,
144,3131,
144,3129,
144,3128,
143,3127,
143,3126,
143,3125,
143,3124,
142,3123,
142,3122,
142,3120,
142,3119,
141,3118,
141,3117,
141,3116,
141,3115,
141,3114,
140,3112,
140,3111,
140,3110,
140,3109,
139,3108,
139,3107,
139,3106,
139,3105,
138,3103,
138,3102,
138,3101,
138,3100,
137,3099,
137,3098,
137,3097,
137,3095,
136,3094,
136,3093,
136,3092,
136,3091,
136,3090,
135,3089,
135,3088,
135,3086,
135,3085,
134,3084,
134,3083,
134,3082,
134,3081,
133,3080,
133,3078,
133,3077,
133,3076,
132,3075,
132,3074,
132,3073,
132,3072,
131,3071,
131,3069,
131,3068,
131,3067,
130,3066,
130,3065,
130,3064,
130,3063,
130,3061,
129,3060,
129,3059,
129,3058,
129,3057,
128,3056,
128,3055,
128,3054,
128,3052,
127,3051,
127,3050,
127,3049,
127,3048,
126,3047,
126,3046,
126,3044,
126,3043,
125,3042,
125,3041,
125,3040,
125,3039,
125,3038,
124,3037,
124,3035,
124,3034,
124,3033,
123,3032,
123,3031,
123,3030,
123,3029,
122,3027,
122,3026,
122,3025,
122,3024,
121,3023,
121,3022,
121,3021,
121,3020,
120,3018,
120,3017,
120,3016,
120,3015,
119,3014,
119,3013,
119,3012,
119,3010,
119,3009,
118,3008,
118,3007,
118,3006,
118,3005,
117,3004,
117,3003,
117,3001,
117,3000,
116,2999,
116,2998,
116,2997,
116,2996,
115,2995,
115,2993,
115,2992,
115,2991,
114,2990,
114,2989,
114,2988,
114,2987,
114,2986,
113,2984,
113,2983,
113,2982,
113,2981,
112,2980,
112,2979,
112,2978,
112,2976,
111,2975,
111,2974,
111,2973,
111,2972,
110,2971,
110,2970,
110,2969,
110,2967,
109,2966,
109,2965,
109,2964,
109,2963,
108,2962,
108,2961,
108,2959,
108,2958,
108,2957,
107,2956,
107,2955,
107,2954,
107,2953,
106,2952,
106,2950,
106,2949,
106,2948,
105,2947,
105,2946,
105,2945,
105,2944,
104,2942,
104,2941,
104,2940,
104,2939,
103,2938,
103,2937,
103,2936,
103,2935,
103,2933,
102,2932,
102,2931,
102,2930,
102,2929,
101,2928,
101,2927,
101,2926,
101,2924,
100,2923,
100,2922,
100,2921,
100,2920,
99,2919,
99,2918,
99,2916,
99,2915,
98,2914,
98,2913,
98,2912,
98,2911,
97,2910,
97,2909,
97,2907,
97,2906,
97,2905,
96,2904,
96,2903,
96,2902,
96,2901,
95,2899,
95,2898,
95,2897,
95,2896,
94,2895,
94,2894,
94,2893,
0,94,2892,
13,2,93,2890,
26,4,93,2889,
39,6,93,2888,
53,8,93,2887,
66,10,92,2886,
79,12,92,2885,
14,92,2884,
16,2882,
18,2881,
20,2880,
22,2879,
24,2878,
26,2877,
28,2876,
30,2875,
32,2873,
34,2872,
36,2871,
38,2870,
40,2869,
42,2868,
44,2867,
46,2865,
48,2864,
50,2863,
52,2862,
54,2861,
56,2860,
58,2859,
60,2858,
62,2856,
64,2855,
66,2854,
68,2853,
70,2852,
72,2851,
74,2850,
76,2848,
78,2847,
80,2846,
82,2845,
83,2844,
85,2843,
87,2842,
89,2841,
91,2839,
93,2838,
95,2837,
97,2836,
99,2835,
101,2834,
103,2833,
105,2831,
107,2830,
109,2829,
111,2828,
113,2827,
115,2826,
117,2825,
119,2824,
121,2822,
123,2821,
125,2820,
127,2819,
129,2818,
131,2817,
133,2816,
135,2814,
137,2813,
139,2812,
141,2811,
143,2810,
145,2809,
147,2808,
149,2807,
151,2805,
153,2804,
155,2803,
157,2802,
159,2801,
161,2800,
163,2799,
165,2797,
167,2796,
169,2795,
171,2794,
173,2793,
175,2792,
177,2791,
179,2790,
181,2788,
183,2787,
185,2786,
187,2785,
189,2784,
191,2783,
193,2782,
195,2780,
197,2779,
199,2778,
201,2777,
203,2776,
205,2775,
207,2774,
209,2773,
211,2771,
213,2770,
215,2769,
217,2768,
219,2767,
221,2766,
223,2765,
225,2763,
227,2762,
229,2761,
231,2760,
233,2759,
235,2758,
237,2757,
239,2756,
241,2754,
243,2753,
245,2752,
247,2751,
249,2750,
250,2749,
252,2748,
254,2746,
256,2745,
258,2744,
260,2743,
262,2742,
264,2741,
266,2740,
268,2739,
270,2737,
272,2736,
274,2735,
276,2734,
278,2733,
280,2732,
282,2731,
284,2729,
286,2728,
288,2727,
290,2726,
292,2725,
294,2724,
296,2723,
298,2722,
300,2720,
302,2719,
304,2718,
306,2717,
308,2716,
310,2715,
312,2714,
314,2712,
316,2711,
318,2710,
320,2709,
322,2708,
324,2707,
326,2706,
328,2705,
330,2703,
332,2702,
334,2701,
336,2700,
338,2699,
340,2698,
342,2697,
344,2695,
346,2694,
348,2693,
350,2692,
352,2691,
354,2690,
356,2689,
358,2688,
360,2686,
362,2685,
364,2684,
366,2683,
368,2682,
370,2681,
372,2680,
374,2678,
376,2677,
378,2676,
380,2675,
382,2674,
384,2673,
386,2672,
388,2671,
390,2669,
392,2668,
394,2667,
396,2666,
398,2665,
400,2664,
402,2663,
404,2661,
406,2660,
408,2659,
410,2658,
412,2657,
414,2656,
415,2655,
417,2654,
419,2652,
421,2651,
423,2650,
425,2649,
427,2648,
429,2647,
431,2646,
433,2644,
435,2643,
437,2642,
439,2641,
441,2640,
443,2639,
445,2638,
447,2637,
449,2635,
451,2634,
453,2633,
455,2632,
457,2631,
459,2630,
461,2629,
463,2627,
465,2626,
467,2625,
469,2624,
471,2623,
473,2622,
475,2621,
477,2620,
479,2618,
481,2617,
483,2616,
485,2615,
487,2614,
489,2613,
491,2612,
493,2610,
495,2609,
497,2608,
499,2607,
501,2606,
503,2605,
505,2604,
507,2603,
509,2601,
511,2600,
513,2599,
515,2598,
517,2597,
519,2596,
521,2595,
523,2593,
525,2592,
527,2591,
529,2590,
531,2589,
533,2588,
535,2587,
537,2586,
539,2584,
541,2583,
543,2582,
545,2581,
547,2580,
549,2579,
551,2578,
553,2576,
555,2575,
557,2574,
559,2573,
561,2572,
563,2571,
565,2570,
567,2569,
569,2567,
571,2566,
573,2565,
575,2564,
577,2563,
579,2562,
581,2561,
582,2559,
584,2558,
586,2557,
588,2556,
590,2555,
592,2554,
594,2553,
596,2552,
598,2550,
600,2549,
602,2548,
604,2547,
606,2546,
608,2545,
610,2544,
612,2543,
614,2541,
616,2540,
618,2539,
620,2538,
622,2537,
624,2536,
626,2535,
628,2533,
630,2532,
632,2531,
634,2530,
636,2529,
638,2528,
640,2527,
642,2526,
644,2524,
646,2523,
648,2522,
650,2521,
652,2520,
654,2519,
656,2518,
658,2516,
660,2515,
662,2514,
664,2513,
666,2512,
668,2511,
670,2510,
672,2509,
674,2507,
676,2506,
678,2505,
680,2504,
682,2503,
684,2502,
686,2501,
688,2499,
690,2498,
692,2497,
694,2496,
696,2495,
698,2494,
700,2493,
702,2492,
704,2490,
706,2489,
708,2488,
710,2487,
712,2486,
714,2485,
716,2484,
718,2482,
720,2481,
722,2480,
724,2479,
726,2478,
728,2477,
730,2476,
732,2475,
734,2473,
736,2472,
738,2471,
740,2470,
742,2469,
744,2468,
746,2467,
747,2465,
749,2464,
751,2463,
753,2462,
755,2461,
757,2460,
759,2459,
761,2458,
763,2456,
765,2455,
767,2454,
769,2453,
771,2452,
773,2451,
775,2450,
777,2448,
779,2447,
781,2446,
783,2445,
785,2444,
787,2443,
789,2442,
791,2441,
793,2439,
795,2438,
797,2437,
799,2436,
801,2435,
803,2434,
805,2433,
807,2431,
809,2430,
811,2429,
813,2428,
815,2427,
817,2426,
819,2425,
821,2424,
823,2422,
825,2421,
827,2420,
829,2419,
831,2418,
833,2417,
835,2416,
837,2414,
839,2413,
841,2412,
843,2411,
845,2410,
847,2409,
849,2408,
851,2407,
853,2405,
855,2404,
857,2403,
859,2402,
861,2401,
863,2400,
865,2399,
867,2397,
869,2396,
871,2395,
873,2394,
875,2393,
877,2392,
879,2391,
881,2390,
883,2388,
885,2387,
887,2386,
889,2385,
891,2384,
893,2383,
895,2382,
897,2380,
899,2379,
901,2378,
903,2377,
905,2376,
907,2375,
909,2374,
911,2373,
913,2371,
914,2370,
916,2369,
918,2368,
920,2367,
922,2366,
924,2365,
926,2363,
928,2362,
930,2361,
932,2360,
934,2359,
936,2358,
938,2357,
940,2356,
942,2354,
944,2353,
946,2352,
948,2351,
950,2347,
952,2344,
954,2340,
956,2337,
958,2333,
960,2330,
962,2326,
964,2323,
966,2319,
968,2316,
970,2312,
972,2309,
974,2305,
976,2302,
978,2298,
980,2295,
982,2291,
984,2288,
986,2284,
988,2281,
990,2277,
992,2274,
994,2270,
996,2267,
998,2263,
1000,2260,
1002,2256,
1004,2253,
1006,2249,
1008,2246,
1010,2242,
1012,2239,
1014,2235,
1016,2232,
1018,2228,
1020,2225,
1022,2221,
1024,2218,
1026,2214,
1028,2211,
1030,2207,
1032,2204,
1034,2200,
1036,2197,
1038,2193,
1040,2190,
1042,2186,
1044,2183,
1046,2179,
1048,2176,
1050,2172,
1052,2169,
1054,2165,
1056,2162,
1058,2158,
1060,2155,
1062,2151,
1064,2148,
1066,2144,
1068,2141,
1070,2137,
1072,2134,
1074,2130,
1076,2127,
1078,2123,
1080,2120,
1081,2116,
1083,2113,
1085,2109,
1087,2106,
1089,2102,
1091,2099,
1093,2095,
1095,2092,
1097,2088,
1099,2085,
1101,2081,
1103,2078,
1105,2074,
1107,2071,
1109,2067,
1111,2064,
1113,2060,
1115,2057,
1117,2053,
1119,2050,
1121,2046,
1123,2043,
1125,2039,
1127,2036,
1129,2032,
1131,2029,
1133,2025,
1135,2022,
1137,2018,
1139,2015,
1141,2011,
1143,2008,
1145,2004,
1147,2001,
1149,1997,
1151,1997,
1153,1996,
1155,1996,
1157,1995,
1159,1995,
1161,1994,
1163,1994,
1165,1993,
1167,1993,
1169,1992,
1171,1992,
1173,1991,
1175,1991,
1177,1990,
1179,1990,
1181,1989,
1183,1989,
1185,1988,
1187,1988,
1189,1987,
1191,1987,
1193,1986,
1195,1986,
1197,1985,
1199,1985,
1201,1984,
1203,1984,
1205,1983,
1207,1983,
1209,1982,
1211,1982,
1213,1981,
1215,1981,
1217,1980,
1219,1980,
1221,1979,
1223,1979,
1225,1978,
1227,1978,
1229,1977,
1231,1977,
1233,1976,
1235,1976,
1237,1975,
1239,1975,
1241,1974,
1243,1974,
1245,1973,
1246,1973,
1248,1972,
1250,1972,
1252,1971,
1254,1971,
1256,1970,
1258,1970,
1260,1969,
1262,1969,
1264,1968,
1266,1968,
1268,1967,
1270,1967,
1272,1966,
1274,1966,
1276,1965,
1278,1965,
1280,1964,
1282,1964,
1284,1963,
1286,1963,
1288,1962,
1290,1962,
1292,1961,
1294,1961,
1296,1960,
1298,1960,
1300,1959,
1302,1959,
1304,1958,
1306,1958,
1308,1957,
1310,1957,
1312,1956,
1314,1956,
1316,1955,
1318,1955,
1320,1954,
1322,1954,
1324,1953,
1326,1953,
1328,1952,
1330,1952,
1332,1951,
1334,1951,
1336,1950,
1338,1950,
1340,1949,
1342,1949,
1344,1948,
1346,1948,
1348,1947,
1350,1947,
1352,1946,
1354,1946,
1356,1945,
1358,1945,
1360,1944,
1362,1944,
1364,1943,
1366,1943,
1368,1942,
1370,1942,
1372,1941,
1374,1941,
1376,1940,
1378,1940,
1380,1939,
1382,1939,
1384,1938,
1386,1938,
1388,1937,
1390,1937,
1392,1936,
1394,1936,
1396,1935,
1398,1935,
1400,1934,
1402,1934,
1404,1933,
1406,1933,
1408,1932,
1410,1932,
1412,1931,
1413,1931,
1415,1930,
1417,1930,
1419,1929,
1421,1929,
1423,1928,
1425,1928,
1427,1927,
1429,1927,
1431,1926,
1433,1926,
1435,1925,
1437,1925,
1439,1924,
1441,1924,
1443,1923,
1445,1923,
1447,1922,
1449,1922,
1451,1921,
1453,1921,
1455,1920,
1457,1920,
1459,1919,
1461,1919,
1463,1918,
1465,1918,
1467,1917,
1469,1917,
1471,1916,
1473,1916,
1475,1915,
1477,1915,
1479,1914,
1481,1914,
1483,1913,
1485,1913,
1487,1912,
1489,1912,
1491,1911,
1493,1911,
1495,1910,
1497,1910,
1499,1909,
1501,1909,
1503,1908,
1505,1908,
1507,1907,
1509,1907,
1511,1906,
1513,1906,
1515,1905,
1517,1905,
1519,1904,
1521,1904,
1523,1903,
1525,1903,
1527,1902,
1529,1902,
1531,1901,
1533,1901,
1535,1900,
1537,1900,
1539,1899,
1541,1899,
1543,1898,
1545,1898,
1547,1897,
1549,1897,
1551,1896,
1553,1896,
1555,1895,
1557,1895,
1559,1894,
1561,1894,
1563,1893,
1565,1893,
1567,1892,
1569,1892,
1571,1891,
1573,1891,
1575,1890,
1577,1890,
1578,1889,
1580,1889,
1582,1888,
1584,1888,
1586,1887,
1588,1887,
1590,1886,
1592,1886,
1594,1885,
1596,1885,
1598,1884,
1600,1884,
1602,1883,
1604,1883,
1606,1882,
1608,1882,
1610,1881,
1612,1881,
1614,1880,
1616,1880,
1618,1879,
1620,1879,
1622,1878,
1624,1878,
1626,1877,
1628,1877,
1630,1876,
1632,1876,
1634,1875,
1636,1875,
1638,1874,
1640,1874,
1642,1873,
1644,1873,
1646,1872,
1648,1872,
1650,1871,
1652,1871,
1654,1870,
1656,1870,
1658,1869,
1660,1869,
1662,1868,
1664,1868,
1666,1867,
1668,1867,
1670,1866,
1672,1866,
1674,1865,
1676,1865,
1678,1864,
1680,1864,
1682,1863,
1684,1863,
1686,1862,
1688,1862,
1690,1861,
1692,1861,
1694,1860,
1696,1860,
1698,1859,
1700,1859,
1702,1858,
1704,1858,
1706,1857,
1708,1857,
1710,1856,
1712,1856,
1714,1855,
1716,1855,
1718,1854,
1720,1854,
1722,1853,
1724,1853,
1726,1852,
1728,1852,
1730,1851,
1732,1851,
1734,1850,
1736,1850,
1738,1849,
1740,1849,
1742,1848,
1744,1848,
1745,1847,
1747,1847,
1749,1846,
1751,1846,
1753,1845,
1755,1845,
1757,1844,
1759,1844,
1761,1843,
1763,1843,
1765,1842,
1767,1842,
1769,1841,
1771,1841,
1773,1840,
1775,1840,
1777,1839,
1779,1839,
1781,1838,
1783,1838,
1785,1837,
1787,1837,
1789,1836,
1791,1836,
1793,1835,
1795,1835,
1797,1834,
1799,1834,
1801,1833,
1803,1833,
1805,1832,
1807,1832,
1809,1831,
1811,1831,
1813,1830,
1815,1830,
1817,1829,
1819,1829,
1821,1828,
1823,1828,
1825,1827,
};

Đó là dữ liệu nhỏ để test, chỉ khoảng > 10k để minh nạp vào con 89c55. CÒn dữ liệu yêu cầu là kiểu long, và số phần tử lên đến vài trăm nghìn --> dung luơng lên đến vài MB. Dữ liệu này là để lưu dữ liệu cho vùng bản đồ, mình đang làm đề tài về định vị trên vùng bản đồ nào đó.

[quoc_thaibk]

trường hợp này của cậu phải dùng software thôi.Vì 8051 hỗ trợ bus dữ liệu ở mức là 16bit->64KB max.
Nếu muốn lên đến 4MB thì phải thực hiện soft core nhưng lúc đó thì tốn hầu hết các chân cho viẹc đọc rom:26 chân cho dữ liệu 4MB.8 chân cho data nếu như dùng cách đơn giản.-->34 chân.
Nếu không cần tốt độ quá cao mình đề xuất bạn dùng máy tính làm host chứa cơ sỡ dữ liệu còn VĐK là người truy vấn dữ liệu như vậy thì có thể tốc độ không như rom nhưng có thể làm việc với dữ liệu cực lớn.

[ngocdq]

Cám ơn Quốc Thái, tuy nhiên yêu cầu của đề tài là toàn bộ phải tích hợp trên một thiết bị đơn, để có thể mang đi mang lại được.
Bạn thử xem có cách nào giúp mình ko, mình thấy nếu nạp được toàn bộ trên ROM mà chạy được thì quá Ok, TUy nhiên khi mình nạp vào ROm và để cho VXL chạy ở chế độ bộ nhớ chương trình ngoài (chân 31 nối với VCC) thì chẳng thấy chạy gì sất. Khi mình hỏi mấy ông bạn cũng lơ mơ về cái này, họ nói địa chỉ bắt đầu gì đó... ko xác định được nên ko chạy, ---> mình cũng ko hiểu nốt,

Còn cách lưu dữ liệu ở ROm ngoài, còn chương trình nạp vào ROM trong thì, Mình nghĩ có ROM 4MB thì chắc phải có cách đọc được 4MB chứ nhỉ, Xin các bạn chỉ dẫn mình với. THực sự lửa đang cháy dưới mông rồi nên ko còn bình tĩnh để nghiên cứu nữa ....

[thelam]

Theo mình nghĩ bạn có 2 lựa chọn: USB và Serial EEPROM/Flash. USB thì đắt và phải đổi hardware lẫn design, nên trong trường hợp này không khả thi. Bạn thử dùng Serial EEPROM hoặc serial Flash xem. Không biết speed có bị hạn chế trong application của bạn không, phần lớn serial EEPROM và flash interface theo SPI hoặc I2C standard, nếu hardware của bạn không hổ trợ thì phải bit-banging SPI thôi.
Google search key word: Serial flash memory. Ở Việt Nam có thể khó mua serial flash thì kiếm mấy con MMC của digital camera hay MP3 dùng thử.
Here are links for references:
http://www.silabs.com/public/documen...B/en/an189.pdf
http://pdfserv.maxim-ic.com/en/an/AN802.pdf
http://www.atmel.com/dyn/resources/p...ts/doc3595.pdf