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HDD: handle 0 packet size

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This commit is contained in:
Gyorgy Szombathelyi
2022-08-24 16:24:49 +02:00
parent 532dc5d9cb
commit e2639f45df
1 changed files with 13 additions and 11 deletions
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24
hdd.c
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@@ -337,26 +337,28 @@ static void WriteStatus(unsigned char status)
static void WritePacket(unsigned char unit, const unsigned char *buf, unsigned short bufsize, char lastpacket)
{
unsigned short bytes;
while (bufsize) {
do {
bytes = MIN(bufsize, 2352);
while (!(GetFPGAStatus() & CMD_IDECMD)); // wait for empty sector buffer
WriteTaskFile(0, 0x02, 0, bytes & 0xff, (bytes>>8) & 0xff, 0xa0 | ((unit & 0x01)<<4));
EnableFpga();
SPI(CMD_IDE_DATA_WR); // write data command
SPI(0x00);
SPI(0x00);
SPI(0x00);
SPI(0x00);
SPI(0x00);
spi_write(buf, bytes);
DisableFpga();
if (bytes) {
EnableFpga();
SPI(CMD_IDE_DATA_WR); // write data command
SPI(0x00);
SPI(0x00);
SPI(0x00);
SPI(0x00);
SPI(0x00);
spi_write(buf, bytes);
DisableFpga();
}
buf += bytes;
bufsize -= bytes;
if (lastpacket && !bufsize)
WriteStatus(IDE_STATUS_IRQ | IDE_STATUS_END);
else
WriteStatus(IDE_STATUS_IRQ);
}
} while (bufsize);
}
static void cdrom_setsense(unsigned char key, unsigned char asc, unsigned char ascq)