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if a romregion was erased specifically, don't fill it with random data if a rom fails to load (such as missing ROM_LOAD_OPTIONAL or in case of NO_DUMP)

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This commit is contained in:
Michaël Banaan Ananas 2011-09-17 04:38:52 +00:00
parent d2d71f02cf
commit 553a8023b4
1 changed files with 13 additions and 13 deletions
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26
src/emu/romload.c
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@ -709,14 +709,14 @@ static int open_rom_file(rom_load_data *romdata, const char *regiontag, const ro
random data for a NULL file
-------------------------------------------------*/
static int rom_fread(rom_load_data *romdata, UINT8 *buffer, int length)
static int rom_fread(rom_load_data *romdata, UINT8 *buffer, int length, const rom_entry *parent_region)
{
/* files just pass through */
if (romdata->file != NULL)
return romdata->file->read(buffer, length);
/* otherwise, fill with randomness */
else
/* otherwise, fill with randomness unless it was already specifically erased */
else if (!ROMREGION_ISERASE(parent_region))
fill_random(romdata->machine(), buffer, length);
return length;
@ -728,7 +728,7 @@ static int rom_fread(rom_load_data *romdata, UINT8 *buffer, int length)
entry
-------------------------------------------------*/
static int read_rom_data(rom_load_data *romdata, const rom_entry *romp)
static int read_rom_data(rom_load_data *romdata, const rom_entry *parent_region, const rom_entry *romp)
{
int datashift = ROM_GETBITSHIFT(romp);
int datamask = ((1 << ROM_GETBITWIDTH(romp)) - 1) << datashift;
@ -758,7 +758,7 @@ static int read_rom_data(rom_load_data *romdata, const rom_entry *romp)
/* special case for simple loads */
if (datamask == 0xff && (groupsize == 1 || !reversed) && skip == 0)
return rom_fread(romdata, base, numbytes);
return rom_fread(romdata, base, numbytes, parent_region);
/* use a temporary buffer for complex loads */
tempbufsize = MIN(TEMPBUFFER_MAX_SIZE, numbytes);
@ -774,7 +774,7 @@ static int read_rom_data(rom_load_data *romdata, const rom_entry *romp)
/* read as much as we can */
LOG((" Reading %X bytes into buffer\n", bytesleft));
if (rom_fread(romdata, bufptr, bytesleft) != bytesleft)
if (rom_fread(romdata, bufptr, bytesleft, parent_region) != bytesleft)
{
auto_free(romdata->machine(), tempbuf);
return 0;
@ -904,7 +904,7 @@ static void copy_rom_data(rom_load_data *romdata, const rom_entry *romp)
for a region
-------------------------------------------------*/
static void process_rom_entries(rom_load_data *romdata, const char *regiontag, const rom_entry *romp)
static void process_rom_entries(rom_load_data *romdata, const char *regiontag, const rom_entry *parent_region, const rom_entry *romp)
{
UINT32 lastflags = 0;
@ -962,7 +962,7 @@ static void process_rom_entries(rom_load_data *romdata, const char *regiontag, c
/* attempt to read using the modified entry */
if (!ROMENTRY_ISIGNORE(&modified_romp) && !irrelevantbios)
/*readresult = */read_rom_data(romdata, &modified_romp);
/*readresult = */read_rom_data(romdata, parent_region, &modified_romp);
}
while (ROMENTRY_ISCONTINUE(romp) || ROMENTRY_ISIGNORE(romp));
@ -1205,7 +1205,7 @@ done:
for a region
-------------------------------------------------*/
static void process_disk_entries(rom_load_data *romdata, const char *regiontag, const rom_entry *romp, const char *locationtag)
static void process_disk_entries(rom_load_data *romdata, const char *regiontag, const rom_entry *parent_region, const rom_entry *romp, const char *locationtag)
{
/* loop until we hit the end of this region */
for ( ; !ROMENTRY_ISREGIONEND(romp); romp++)
@ -1424,9 +1424,9 @@ void load_software_part_region(device_t *device, char *swlist, char *swname, rom
/* now process the entries in the region */
if (ROMREGION_ISROMDATA(region))
process_rom_entries(romdata, locationtag, region + 1);
process_rom_entries(romdata, locationtag, region, region + 1);
else if (ROMREGION_ISDISKDATA(region))
process_disk_entries(romdata, core_strdup(regiontag.cstr()), region + 1, locationtag);
process_disk_entries(romdata, core_strdup(regiontag.cstr()), region, region + 1, locationtag);
}
/* now go back and post-process all the regions */
@ -1489,10 +1489,10 @@ static void process_region_list(rom_load_data *romdata)
#endif
/* now process the entries in the region */
process_rom_entries(romdata, (source->shortname()!=NULL) ? source->shortname() : NULL, region + 1);
process_rom_entries(romdata, (source->shortname()!=NULL) ? source->shortname() : NULL, region, region + 1);
}
else if (ROMREGION_ISDISKDATA(region))
process_disk_entries(romdata, ROMREGION_GETTAG(region), region + 1, NULL);
process_disk_entries(romdata, ROMREGION_GETTAG(region), region, region + 1, NULL);
}
/* now go back and post-process all the regions */