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megacd: support for backup mount/init.

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This commit is contained in:
sorgelig
2019-12-09 07:41:39 +08:00
parent 312873d0cf
commit aedb73aa12
6 changed files with 298 additions and 229 deletions
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48
user_io.cpp
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@@ -1185,6 +1185,14 @@ void user_io_set_index(unsigned char index)
DisableFpga();
}
void user_io_set_download(unsigned char enable)
{
EnableFpga();
spi8(UIO_FILE_TX);
spi8(enable ? 0xff : 0x00);
DisableFpga();
}
int user_io_file_mount(char *name, unsigned char index, char pre)
{
int writable = 0;
@@ -1529,11 +1537,7 @@ static void send_pcolchr(const char* name, unsigned char index, int type)
//hexdump(col_attr, sizeof(col_attr));
user_io_set_index(index);
EnableFpga();
spi8(UIO_FILE_TX);
spi8(0xff);
DisableFpga();
user_io_set_download(1);
EnableFpga();
spi8(UIO_FILE_TX_DAT);
@@ -1541,10 +1545,7 @@ static void send_pcolchr(const char* name, unsigned char index, int type)
DisableFpga();
// signal end of transmission
EnableFpga();
spi8(UIO_FILE_TX);
spi8(0x00);
DisableFpga();
user_io_set_download(0);
}
}
@@ -1638,10 +1639,7 @@ int user_io_file_tx(const char* name, unsigned char index, char opensave, char m
DisableFpga();
// prepare transmission of new file
EnableFpga();
spi8(UIO_FILE_TX);
spi8(0xff);
DisableFpga();
user_io_set_download(1);
if (is_snes_core() && bytes2send)
{
@@ -1714,10 +1712,7 @@ int user_io_file_tx(const char* name, unsigned char index, char opensave, char m
}
// signal end of transmission
EnableFpga();
spi8(UIO_FILE_TX);
spi8(0x00);
DisableFpga();
user_io_set_download(0);
printf("\n");
if (is_zx81_core() && index)
@@ -2518,7 +2513,24 @@ void user_io_poll()
//Even after error we have to provide the block to the core
//Give an empty block.
if (!done) memset(buffer[disk], (sd_image[disk].type == 2) ? -1 : 0, sizeof(buffer[disk]));
if (!done)
{
if (sd_image[disk].type == 2)
{
if (is_megacd_core())
{
mcd_fill_blanksave(buffer[disk], lba);
}
else
{
memset(buffer[disk], -1, sizeof(buffer[disk]));
}
}
else
{
memset(buffer[disk], 0, sizeof(buffer[disk]));
}
}
buffer_lba[disk] = lba;
}