1 // Cut this out as emm.c
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4 * Module: All Modules
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5 * Author(s): Chris Somers
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6 * Date: December 1, 1992
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9 minor mods by Alex Russell to simplify
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11 Must use memory model with FAR code
13 Open Watcom patch by sparky4~
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24 void TransformData(char *pEmmData, unsigned int len)
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35 int main(int argc, char *argv[])
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41 if(OpenEMM() != SUCCESS)
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42 { // make sure we got EMM
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43 printf("EMM unavailable.\n");
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48 printf("Emm %x available\n", EMVer());
49 printf("EMS pages available are %lu\n", EMMCoreLeft());
50 //printf("EMM Hardware Information %lu\n", EMInfo());
53 printf("b4 EMS pEmmData=%p\n", pEmmData);
54 //printf("b4 EMS *pEmmData=%s\n", *pEmmData);
55 advi=EMMCoreLeft()*EMMPAGESIZE;
56 printf("advi=%lu\n", advi);
58 pEmmData = (byte *)EMMalloc(&hEData, EMMCoreLeft()); // get 6 * 16K bytes - 96K
59 if(pEmmData == NULL/* || pEmmData0 == NULL*/)
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61 printf("Not enough EMM or out of handles.\n");
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65 printf("EMM allocate OK\n");
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67 printf("EMS pages available are %lu\n", EMMCoreLeft());
69 printf("Map 1st 4 pages\n");
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70 //MapEMM(hEData, 0, 4); // load 1st 4 pages into page frame: 0-3
71 MapEMM(hEData, 0, 4); // load 1st 4 pages into page frame: 0-3
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72 //memset(pEmmData, 0x0e, 64000u);
73 printf("(advi*EMMPAGESIZE)=%lu\n", advi);
74 memset(pEmmData, atoi(argv[1]), 65536u);//sizeof(atoi(argv[1])));//((EMMCoreLeft())*EMMPAGESIZE));
75 //---- UnmapEMM(hEData, 0, 4); // not absolutely necessary
76 printf("*pEmmData=%c\n", *pEmmData);
78 /*printf("Map next 2 pages\n");
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79 MapEMM(hEData, 4, 2); // map last 2 pages: 4-5
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80 memset(pEmmData, 0x04, 32768u);
81 // memset(pEmmData, atoi(argv[0]), 32768u);
82 printf("*pEmmData=%c\n", *pEmmData);
83 printf(" pEmmData=%p\n", pEmmData);*/
85 /*MapEMM(hEData, 0, 4);
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86 // do some stuff with the first 64K of file data.
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87 printf("Transform data\n");
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88 TransformData(pEmmData, 64000UL);
89 printf("*pEmmData=%lu\n", *pEmmData);
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90 MapEMM(hEData, 4, 2); // only unmaps 1st two pages of prior 64k mapping
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91 // do stuff with remaining 32K of data
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92 TransformData(pEmmData, 32768UL);
93 printf("*pEmmData=%lu\n", *pEmmData);*/
96 UnmapEMM(hEData, 0, 4); // should unmap before freeing
97 //printf("after EMS *pEmmData=%c\n", *pEmmData);
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98 printf("Close emm\n");
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99 EMMFree(hEData); // finished with the file data
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102 printf("after EMS pEmmData=%p\n", pEmmData);
103 printf("EMS pages available are %lu\n", EMMCoreLeft());
104 //printf("EMMPAGESIZE=%d\n", EMMPAGESIZE);