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(MESS) ibmpcjr: Added support for both 128 and 512 byte dumper headers. (nw)

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This commit is contained in:
Wilbert Pol 2013-08-07 20:35:19 +00:00
parent a3bdcb2f56
commit 075a5d6dba
1 changed files with 24 additions and 8 deletions
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32
src/mess/machine/pc.c
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@ -1559,15 +1559,31 @@ DEVICE_IMAGE_LOAD_MEMBER( pc_state, pcjr_cartridge )
{
UINT8 header[0x200];
unsigned header_size = 0;
unsigned image_size = image.length();
/* Check for supported image sizes */
switch( image_size )
/* Check for supported header sizes */
switch( image_size & 0x3ff )
{
case 0x2200:
case 0x4200:
case 0x8200:
case 0x10200:
case 0x80:
header_size = 0x80;
break;
case 0x200:
header_size = 0x200;
break;
default:
image.seterror(IMAGE_ERROR_UNSUPPORTED, "Invalid header size" );
return IMAGE_INIT_FAIL;
}
/* Check for supported image sizes */
switch( image_size - header_size )
{
case 0x2000:
case 0x4000:
case 0x8000:
case 0xa000:
case 0x10000:
break;
default:
image.seterror(IMAGE_ERROR_UNSUPPORTED, "Invalid rom file size" );
@ -1575,14 +1591,14 @@ DEVICE_IMAGE_LOAD_MEMBER( pc_state, pcjr_cartridge )
}
/* Read and verify the header */
if ( 512 != image.fread( header, 512 ) )
if ( header_size != image.fread( header, header_size ) )
{
image.seterror(IMAGE_ERROR_UNSUPPORTED, "Unable to read header" );
return IMAGE_INIT_FAIL;
}
/* Read the cartridge contents */
if ( ( image_size - 0x200 ) != image.fread(memregion("maincpu")->base() + address, image_size - 0x200 ) )
if ( ( image_size - header_size ) != image.fread(memregion("maincpu")->base() + address, image_size - header_size ) )
{
image.seterror(IMAGE_ERROR_UNSUPPORTED, "Unable to read cartridge contents" );
return IMAGE_INIT_FAIL;