src/testemm0.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 (%luKB): ", (dword)emm_unallocated_pages << 4UL);
 104                 h1 = emm_alloc_pages(emm_unallocated_pages);
 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                 /*h2 = emm_alloc_pages(1);
 112                 sanity();
 113                 if (h2 >= 0) printf("OK, handle=%u\n",h2);
 114                 else printf("FAILED\n");
 115
 116                 //printf("Allocating EMM pages (12MB): ");
 117                 //h3 = emm_alloc_pages(0xC00000UL >> 14UL);
 118                 h3 = emm_alloc_pages(1);
 119                 sanity();
 120                 if (h3 >= 0) printf("OK, handle=%u\n",h3);
 121                 else printf("FAILED\n");*/
 122
 123                 while (getch() != 13);
 124
 125                 if (h1 >= 0 && !emm_free_pages(h1)) printf("Cannot free\n");
 126                 sanity();
 127                 /*if (h2 >= 0 && !emm_free_pages(h2)) printf("Cannot free\n");
 128                 sanity();
 129                 if (h3 >= 0 && !emm_free_pages(h3)) printf("Cannot free\n");
 130                 sanity();*/
 131
 132                 printf("Allocating EMM pages (32KB): ");
 133                 h1 = emm_alloc_pages(2);
 134                 sanity();
 135                 if (h1 >= 0) {
 136                         printf("OK, handle=%u\n",h1);
 137                         if (emm_map_page(h1,/*physical*/0,/*logical*/0)) {
 138                                 unsigned int segm = emm_last_phys_page_segment(0);
 139                                 printf("Seg %04x\n",segm);
 140                                 sanity();
 141                                 if (segm > 0) {
 142 #if TARGET_MSDOS == 16
 143                                         char far *ptr = MK_FP(segm,0);
 144 #else
 145                                         char *ptr = (char*)(segm << 4UL);
 146 #endif
 147
 148 #if TARGET_MSDOS == 16
 149                                         _fmemcpy(ptr,(char far*)message,message_l+1);
 150                                         _fmemcpy((char far*)tmp,ptr,message_l+1);
 151 #else
 152                                         x_memcpy(ptr,message,message_l+1);
 153                                         x_memcpy(tmp,ptr,message_l+1);
 154 #endif
 155                                         printf("After writing message there, I read back: '%s'\n",tmp);
 156
 157                                         if (!emm_map_page(h1,0,1)) printf("Cannot remap\n");
 158
 159 #if TARGET_MSDOS == 16
 160                                         _fmemcpy(ptr,(char far*)message2,message2_l+1);
 161                                         _fmemcpy((char far*)tmp,ptr,message2_l+1);
 162 #else
 163                                         x_memcpy(ptr,message2,message2_l+1);
 164                                         x_memcpy(tmp,ptr,message2_l+1);
 165 #endif
 166                                         printf("After mapping to page 2 and writing there, I read back: '%s'\n",tmp);
 167
 168                                         if (!emm_map_page(h1,0,0)) printf("Cannot remap\n");
 169
 170 #if TARGET_MSDOS == 16
 171                                         _fmemcpy((char far*)tmp,ptr,message_l+1);
 172 #else
 173                                         x_memcpy(tmp,ptr,message_l+1);
 174 #endif
 175                                         printf("After mapping back to 1, I read back: '%s'\n",tmp);
 176
 177                                         if (emm_map_page(h1,0,2)) printf("Whoops, I was able to map logical pages beyond what I allocated\n");
 178                                 }
 179                                 else {
 180                                         printf("Cannot get segment\n");
 181                                 }
 182                                 if (!emm_map_page(h1,0,0xFFFF)) printf("Cannot unmap\n");
 183                         }
 184                         else {
 185                                 printf("Cannot map\n");
 186                         }
 187                         if (!emm_free_pages(h1)) printf("Cannot free\n");
 188                 }
 189                 else printf("FAILED\n");
 190
 191                 printf("Allocating EMM pages (32KB): ");
 192                 h1 = emm_alloc_pages(2);
 193                 if (h1 >= 0) {
 194                         printf("OK, handle=%u\n",h1);
 195                         if (    emm_map_page(h1,/*physical*/0,/*logical*/0) &&
 196                                 emm_map_page(h1,/*physical*/1,/*logical*/1)) {
 197                                 unsigned int seg1 = emm_last_phys_page_segment(0);
 198                                 unsigned int seg2 = emm_last_phys_page_segment(1);
 199                                 printf("Seg %04x,%04x\n",seg1,seg2);
 200                                 if (seg1 > 0 && seg2 > 0) {
 201 #if TARGET_MSDOS == 16
 202                                         char far *ptr1 = MK_FP(seg1,0);
 203                                         char far *ptr2 = MK_FP(seg2,0);
 204 #else
 205                                         char *ptr1 = (char*)(seg1 << 4UL);
 206                                         char *ptr2 = (char*)(seg2 << 4UL);
 207 #endif
 208
 209 #if TARGET_MSDOS == 16
 210                                         _fmemcpy(ptr1,(char far*)message,message_l+1);
 211                                         _fmemcpy(ptr2,(char far*)message2,message2_l+1);
 212 #else
 213                                         memcpy(ptr1,message,message_l+1);
 214                                         memcpy(ptr2,message2,message2_l+1);
 215 #endif
 216
 217 #if TARGET_MSDOS == 16
 218                                         _fmemcpy((char far*)tmp,ptr1,message_l+1);
 219                                         _fmemcpy((char far*)tmp2,ptr2,message2_l+1);
 220 #else
 221                                         memcpy(tmp,ptr1,message_l+1);
 222                                         memcpy(tmp2,ptr2,message2_l+1);
 223 #endif
 224
 225                                         printf("After writing message there, I read back:\n'%s'\n'%s'\n",tmp,tmp2);
 226
 227                                         /* now swap the pages */
 228                                         if (!emm_map_page(h1,1,0)) printf("cannot map log 1 -> phys 0\n");
 229                                         if (!emm_map_page(h1,0,1)) printf("cannot map log 0 -> phys 1\n");
 230
 231 #if TARGET_MSDOS == 16
 232                                         _fmemcpy((char far*)tmp,ptr1,message2_l+1);
 233                                         _fmemcpy((char far*)tmp2,ptr2,message_l+1);
 234 #else
 235                                         memcpy(tmp,ptr1,message2_l+1);
 236                                         memcpy(tmp2,ptr2,message_l+1);
 237 #endif
 238
 239                                         printf("After swapping pages, I read back:\n'%s'\n'%s'\n",tmp,tmp2);
 240                                 }
 241                                 else {
 242                                         printf("Cannot get segment\n");
 243                                 }
 244                                 if (!emm_map_page(h1,0,0xFFFF) || !emm_map_page(h1,1,0xFFFF)) printf("Cannot unmap\n");
 245                         }
 246                         else {
 247                                 printf("Cannot map\n");
 248                         }
 249                         if (!emm_free_pages(h1)) printf("Cannot free\n");
 250                 }
 251                 else printf("FAILED\n");
 252
 253                 getch();
 254
 255                 /* we do this test because Microsoft EMM386.EXE seems to max out at 32MB.
 256                  * the host could have 256MB of total memory and it would still report 32MB in EMS */
 257                 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");
 258                 printf("Allocating EMM pages (48MB): ");
 259                 h1 = emm_alloc_pages((48UL << 20UL) >> 14UL);
 260                 if (h1 >= 0) {
 261                         printf("OK, handle=%u\n",h1);
 262                         if (!emm_free_pages(h1)) printf("cannot free\n");
 263                 }
 264                 else printf("FAILED\n");
 265
 266                 printf("Allocating EMM pages (96MB): ");
 267                 h1 = emm_alloc_pages((96UL << 20UL) >> 14UL);
 268                 if (h1 >= 0) {
 269                         printf("OK, handle=%u\n",h1);
 270                         if (!emm_free_pages(h1)) printf("cannot free\n");
 271                 }
 272                 else printf("FAILED\n");
 273         }
 274
 275         return 0;
 276 }