src/testemm.c

   1 /* testemm.c
   2  *
   3  * Test program: Expanded Memory Manager functions
   4  * (C) 2011-2012 Jonathan Campbell.
   5  * Hackipedia DOS library.
   6  *
   7  * This code is licensed under the LGPL.
   8  * <insert LGPL legal text here>
   9  */
  10
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <stdint.h>
  14 #include <assert.h>
  15 #include <stdio.h>
  16 #include <conio.h>
  17 #include <dos.h>
  18
  19 //#include "src/lib/doslib/cpu.h"
  20 #include "src/lib/doslib/dos.h"
  21 #include "src/lib/doslib/emm.h"
  22 //#include <hw/dos/doswin.h>
  23
  24 static const char *message = "Hello world. How are you?";
  25 static const char *message2 = "Pingas. Sup dawg. Hello world. Dork. Hahahajajaja.";
  26 static char tmp[128],tmp2[128];
  27 extern int probe_emm0();
  28
  29 #if 1
  30 # define x_memcpy(a,b,c) memcpy(a,b,c)
  31 #else
  32 /* what have we come to when friggin' memcpy() causes a GPF?!? */
  33 static void x_memcpy(unsigned char *dst,const unsigned char *src,size_t c) {
  34         fprintf(stderr,"memcpy %p -> %p (%lu)\n",
  35                 dst,src,(unsigned long)c);
  36
  37         while (c != 0) {
  38             *dst++ = *src++;
  39             c--;
  40         }
  41 }
  42 #endif
  43
  44 int main() {
  45         size_t message_l = strlen(message),message2_l = strlen(message2);
  46
  47         probe_dos();
  48         printf("DOS version %x.%02u\n",dos_version>>8,dos_version&0xFF);
  49         /*if (detect_windows()) {
  50                 printf("I am running under Windows.\n");
  51                 printf("    Mode: %s\n",windows_mode_str(windows_mode));
  52                 printf("    Ver:  %x.%02u\n",windows_version>>8,windows_version&0xFF);
  53         }
  54         else {
  55                 printf("Not running under Windows or OS/2\n");
  56         }*/
  57
  58         sanity();
  59         if (probe_emm()) {
  60                 int h1,h2,h3;
  61
  62                 sanity();
  63                 printf("Expanded memory manager present. Status = 0x%02x Page frame @0x%04x v%x.%x\n",emm_status,emm_page_frame_segment,emm_version>>4,emm_version&0x0F);
  64                 emm_update_page_count();
  65                 sanity();
  66                 printf("  Unallocated pages:     %u (%luKB)\n",
  67                         emm_unallocated_pages,
  68                         (unsigned long)emm_unallocated_pages << 4UL); /* 2^14 = 16384 */
  69                 printf("  Total pages:           %u (%luKB)\n",
  70                         emm_total_pages,
  71                         (unsigned long)emm_total_pages << 4UL);
  72                 printf("  Physical pages:        %u (%luKB)\n",
  73                         emm_phys_pages,
  74                         (unsigned long)emm_phys_pages << 4UL);
  75
  76                 while (getch() != 13);
  77                 sanity();
  78
  79                 /* print out the mapping table, if available */
  80                 if (emm_phys_map != NULL) {
  81                         struct emm_phys_page_map *me;
  82                         unsigned int i;
  83
  84                         printf("Physical page to segment table\n");
  85                         for (i=0;i < emm_phys_pages;i++) {
  86                                 me = emm_phys_map + i;
  87                                 printf("  %02x: 0x%04x",me->number,me->segment);
  88                                 if ((i%5) == 4) printf("\n");
  89                         }
  90                         printf("\n");
  91                         sanity();
  92                 }
  93
  94                 printf("Allocating EMM pages (1): ");
  95                 h1 = emm_alloc_pages(1);
  96                 sanity();
  97                 if (h1 >= 0) {
  98                         printf("OK, handle=%u\n",h1);
  99                         if (!emm_free_pages(h1)) printf("cannot free\n");
 100                 }
 101                 else printf("FAILED\n");
 102
 103                 printf("Allocating EMM pages (16KB): ");
 104                 h1 = emm_alloc_pages(1);
 105                 sanity();
 106                 if (h1 >= 0) printf("OK, handle=%u\n",h1);
 107                 else printf("FAILED\n");
 108
 109                 printf("Allocating EMM pages (1.6MB): ");
 110                 h2 = emm_alloc_pages(0x19999AUL >> 14UL);
 111                 sanity();
 112                 if (h2 >= 0) printf("OK, handle=%u\n",h2);
 113                 else printf("FAILED\n");
 114
 115                 printf("Allocating EMM pages (12MB): ");
 116                 h3 = emm_alloc_pages(0xC00000UL >> 14UL);
 117                 sanity();
 118                 if (h3 >= 0) printf("OK, handle=%u\n",h3);
 119                 else printf("FAILED\n");
 120
 121                 while (getch() != 13);
 122
 123                 if (h1 >= 0 && !emm_free_pages(h1)) printf("Cannot free\n");
 124                 sanity();
 125                 if (h2 >= 0 && !emm_free_pages(h2)) printf("Cannot free\n");
 126                 sanity();
 127                 if (h3 >= 0 && !emm_free_pages(h3)) printf("Cannot free\n");
 128                 sanity();
 129
 130                 printf("Allocating EMM pages (32KB): ");
 131                 h1 = emm_alloc_pages(2);
 132                 sanity();
 133                 if (h1 >= 0) {
 134                         printf("OK, handle=%u\n",h1);
 135                         if (emm_map_page(h1,/*physical*/0,/*logical*/0)) {
 136                                 unsigned int segm = emm_last_phys_page_segment(0);
 137                                 printf("Seg %04x\n",segm);
 138                                 sanity();
 139                                 if (segm > 0) {
 140 #if TARGET_MSDOS == 16
 141                                         char far *ptr = MK_FP(segm,0);
 142 #else
 143                                         char *ptr = (char*)(segm << 4UL);
 144 #endif
 145
 146 #if TARGET_MSDOS == 16
 147                                         _fmemcpy(ptr,(char far*)message,message_l+1);
 148                                         _fmemcpy((char far*)tmp,ptr,message_l+1);
 149 #else
 150                                         x_memcpy(ptr,message,message_l+1);
 151                                         x_memcpy(tmp,ptr,message_l+1);
 152 #endif
 153                                         printf("After writing message there, I read back: '%s'\n",tmp);
 154
 155                                         if (!emm_map_page(h1,0,1)) printf("Cannot remap\n");
 156
 157 #if TARGET_MSDOS == 16
 158                                         _fmemcpy(ptr,(char far*)message2,message2_l+1);
 159                                         _fmemcpy((char far*)tmp,ptr,message2_l+1);
 160 #else
 161                                         x_memcpy(ptr,message2,message2_l+1);
 162                                         x_memcpy(tmp,ptr,message2_l+1);
 163 #endif
 164                                         printf("After mapping to page 2 and writing there, I read back: '%s'\n",tmp);
 165
 166                                         if (!emm_map_page(h1,0,0)) printf("Cannot remap\n");
 167
 168 #if TARGET_MSDOS == 16
 169                                         _fmemcpy((char far*)tmp,ptr,message_l+1);
 170 #else
 171                                         x_memcpy(tmp,ptr,message_l+1);
 172 #endif
 173                                         printf("After mapping back to 1, I read back: '%s'\n",tmp);
 174
 175                                         if (emm_map_page(h1,0,2)) printf("Whoops, I was able to map logical pages beyond what I allocated\n");
 176                                 }
 177                                 else {
 178                                         printf("Cannot get segment\n");
 179                                 }
 180                                 if (!emm_map_page(h1,0,0xFFFF)) printf("Cannot unmap\n");
 181                         }
 182                         else {
 183                                 printf("Cannot map\n");
 184                         }
 185                         if (!emm_free_pages(h1)) printf("Cannot free\n");
 186                 }
 187                 else printf("FAILED\n");
 188
 189                 printf("Allocating EMM pages (32KB): ");
 190                 h1 = emm_alloc_pages(2);
 191                 if (h1 >= 0) {
 192                         printf("OK, handle=%u\n",h1);
 193                         if (    emm_map_page(h1,/*physical*/0,/*logical*/0) &&
 194                                 emm_map_page(h1,/*physical*/1,/*logical*/1)) {
 195                                 unsigned int seg1 = emm_last_phys_page_segment(0);
 196                                 unsigned int seg2 = emm_last_phys_page_segment(1);
 197                                 printf("Seg %04x,%04x\n",seg1,seg2);
 198                                 if (seg1 > 0 && seg2 > 0) {
 199 #if TARGET_MSDOS == 16
 200                                         char far *ptr1 = MK_FP(seg1,0);
 201                                         char far *ptr2 = MK_FP(seg2,0);
 202 #else
 203                                         char *ptr1 = (char*)(seg1 << 4UL);
 204                                         char *ptr2 = (char*)(seg2 << 4UL);
 205 #endif
 206
 207 #if TARGET_MSDOS == 16
 208                                         _fmemcpy(ptr1,(char far*)message,message_l+1);
 209                                         _fmemcpy(ptr2,(char far*)message2,message2_l+1);
 210 #else
 211                                         memcpy(ptr1,message,message_l+1);
 212                                         memcpy(ptr2,message2,message2_l+1);
 213 #endif
 214
 215 #if TARGET_MSDOS == 16
 216                                         _fmemcpy((char far*)tmp,ptr1,message_l+1);
 217                                         _fmemcpy((char far*)tmp2,ptr2,message2_l+1);
 218 #else
 219                                         memcpy(tmp,ptr1,message_l+1);
 220                                         memcpy(tmp2,ptr2,message2_l+1);
 221 #endif
 222
 223                                         printf("After writing message there, I read back:\n'%s'\n'%s'\n",tmp,tmp2);
 224
 225                                         /* now swap the pages */
 226                                         if (!emm_map_page(h1,1,0)) printf("cannot map log 1 -> phys 0\n");
 227                                         if (!emm_map_page(h1,0,1)) printf("cannot map log 0 -> phys 1\n");
 228
 229 #if TARGET_MSDOS == 16
 230                                         _fmemcpy((char far*)tmp,ptr1,message2_l+1);
 231                                         _fmemcpy((char far*)tmp2,ptr2,message_l+1);
 232 #else
 233                                         memcpy(tmp,ptr1,message2_l+1);
 234                                         memcpy(tmp2,ptr2,message_l+1);
 235 #endif
 236
 237                                         printf("After swapping pages, I read back:\n'%s'\n'%s'\n",tmp,tmp2);
 238                                 }
 239                                 else {
 240                                         printf("Cannot get segment\n");
 241                                 }
 242                                 if (!emm_map_page(h1,0,0xFFFF) || !emm_map_page(h1,1,0xFFFF)) printf("Cannot unmap\n");
 243                         }
 244                         else {
 245                                 printf("Cannot map\n");
 246                         }
 247                         if (!emm_free_pages(h1)) printf("Cannot free\n");
 248                 }
 249                 else printf("FAILED\n");
 250
 251                 getch();
 252
 253                 /* we do this test because Microsoft EMM386.EXE seems to max out at 32MB.
 254                  * the host could have 256MB of total memory and it would still report 32MB in EMS */
 255                 printf("we do this test because Microsoft EMM386.EXE seems to max out at 32MB.\n the host could have 256MB of total memory and it would still report 32MB in EMS");
 256                 printf("Allocating EMM pages (48MB): ");
 257                 h1 = emm_alloc_pages((48UL << 20UL) >> 14UL);
 258                 if (h1 >= 0) {
 259                         printf("OK, handle=%u\n",h1);
 260                         if (!emm_free_pages(h1)) printf("cannot free\n");
 261                 }
 262                 else printf("FAILED\n");
 263
 264                 printf("Allocating EMM pages (96MB): ");
 265                 h1 = emm_alloc_pages((96UL << 20UL) >> 14UL);
 266                 if (h1 >= 0) {
 267                         printf("OK, handle=%u\n",h1);
 268                         if (!emm_free_pages(h1)) printf("cannot free\n");
 269                 }
 270                 else printf("FAILED\n");
 271         }
 272
 273         return 0;
 274 }
 275