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0
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1 /* makerom.c
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2 build ROM image file os9.rom from module list
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3 */
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4
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5 #include <stdio.h>
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6 #include <stdlib.h>
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7 #include <strings.h>
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8 #include <sys/stat.h>
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9
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6
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10 int IOBASE = 0xe000;
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11 int IOSIZE = 0x100;
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12 char * outfile ;
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0
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13
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14 typedef struct os9module {
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15 int size;
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16 int location;
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17 int ioflag;
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18 unsigned char *mod;
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19 char *name;
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20 struct os9module *next;
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21 } *MPTR ;
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22
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23 struct os9module *
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24 readOS9module(char *filename)
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25 {
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26 FILE *fp = fopen(filename,"rb");
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27 if (fp==0) {
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28 fprintf(stderr,"cannot read %s\n",filename);
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29 exit(1);
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30 }
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31 struct stat st;
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32 fstat(fileno(fp),&st);
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33 int size = st.st_size;
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34 struct os9module *m = malloc(size + sizeof(struct os9module));
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35 m->size = size;
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36 m->next = 0;
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37 m->ioflag = 0;
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38 m->mod = (unsigned char*)m + sizeof(struct os9module);
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39 fread(m->mod , size, 1, fp);
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40 m->name = (char*) (m->mod + (m->mod[4]*256 + m->mod[5]) );
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41 fclose(fp);
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42 return m;
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43 }
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44
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45 void
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46 fputword(unsigned short x, FILE *fp)
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47 {
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48 fputc((x>>8)&0xff,fp);
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49 fputc(x&0xff,fp);
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50 }
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51
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52 void printOs9Str(char *p)
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53 {
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54 while((*p & 0x80)==0) {
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55 putchar(*p);
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56 p++;
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57 }
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58 putchar(*p & 0x7f);
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59 }
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60
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1
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61 // calcurate position from the botton
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62 // avoid v09 IO map on 0xe000-0xe800
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63 // os9p1 have to be last and at 0xf800
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0
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64 int findLocation(MPTR m, int loc) {
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65 if (m==0) return loc;
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66 int top = findLocation(m->next, loc) - m->size;
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67 if (m->next==0) top = 0xf800; // OS9p1
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68 if (!(( top+m->size < IOBASE ) || ( IOBASE+IOSIZE < top)) ) {
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69 top = IOBASE-m->size-1;
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70 m->ioflag = 1;
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71 // printf("*");
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72 }
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73 m->location = top;
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74 // printf("mod ");
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75 // printOs9Str(m->name);
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76 // printf(" \t: 0x%x - 0x%x\n",top, top + m->size);
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77 return top;
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78 }
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79
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80 int
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81 main(int ac, char *av[])
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82 {
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83 int vectable = 0;
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84 struct os9module *m = 0, root ;
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85 root.size = 0;
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86 root.mod = 0;
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87 m = &root;
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88
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6
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89 for(int i = 1 ; i<ac ; i++ ) {
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90 if (*av[i]=='-') {
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91 if (av[i][1] =='i') {
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92 IOBASE = strtol(av[i],(char**)0,0);
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93 i += 1;
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94 } else if (av[i][1] =='o') {
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95 outfile = av[i+1];
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96 i += 1;
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97 } else {
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98 return 1;
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99 }
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100 continue;
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101 }
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0
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102 struct os9module *cur;
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103 cur = readOS9module(av[i]);
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104 m->next = cur;
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105 m = cur;
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106 }
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107
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108 FILE *romfile;
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109 unsigned pos;
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6
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110 if (outfile==0) return 1;
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0
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111
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6
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112 romfile=fopen(outfile,"wb");
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0
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113 if(!romfile) {
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114 fprintf(stderr,"Cannot create file %s\n",av[1]);
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115 exit(1);
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116 }
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117
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118
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119 int start = findLocation(root.next,0);
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120 start = start&0xf800;
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121 printf("\n\n");
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122
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123 pos = start;
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124 for(struct os9module *cur = root.next; cur ; cur = cur->next ) {
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6
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125 // last module have to os9p1
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126 if ( cur->next == 0 ) { // cur->size && (cur->name[0]=='O' && cur->name[1]=='S' && cur->name[2]== -71)) {
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1
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127 for(; pos < 0xf800 ; pos++) { // os9p1 begins at 0xf800
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0
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128 fputc(0xff,romfile);
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129 }
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130 }
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131 printf("mod ");
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132 printOs9Str(cur->name);
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133 fwrite(cur->mod, cur->size, 1, romfile);
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134 printf(" \t: 0x%x - 0x%x\n",pos, pos + cur->size);
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135 // printf(" \t: 0x%x - 0x%x : 0x%lx \n",pos, pos + cur->size, ftell(romfile)+start);
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136 pos = pos+cur->size;
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137 if (cur->ioflag) {
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138 for(; pos < IOBASE + IOSIZE; pos++) {
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139 fputc(0xff,romfile);
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140 }
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141 printf("*");
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142 }
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143 }
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144 printf("os9 end %x\n",pos);
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145 vectable = 0x10000 - 2*7;
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146 for( ; pos<vectable; pos++) fputc(0xff,romfile);
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147 printf("vectbl %x\n",pos);
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148 fputword(0xF82d,romfile);
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149 fputword(0xF831,romfile);
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150 fputword(0xF835,romfile);
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151 fputword(0xF839,romfile);
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152 fputword(0xF83d,romfile);
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153 fputword(0xF841,romfile);
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154 fputword(0xF876,romfile);
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155
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156 printf("boot rom from 0x%lx\n",0x10000-ftell(romfile));
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157 fclose(romfile);
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158 return 0;
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159 }
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