See Duckstation's CDROM for reference :
https://github.com/stenzek/duckstation/blob/
18241978ea056a81ff9847f0ad89658f886153ea/src/core/cdrom.cpp#L1087
This probably shouldn't make a difference but who knows.
switch (cdr.Cmd) {
case CdlSetloc:
switch (cdr.Cmd) {
case CdlSetloc:
- for (i = 0; i < 3; i++)
- set_loc[i] = btoi(cdr.Param[i]);
+ CDR_LOG("CDROM setloc command (%02X, %02X, %02X)\n", cdr.Param[0], cdr.Param[1], cdr.Param[2]);
- i = msf2sec(cdr.SetSectorPlay);
- i = abs(i - msf2sec(set_loc));
- if (i > 16)
- cdr.Seeked = SEEK_PENDING;
+ // MM must be BCD, SS must be BCD and <0x60, FF must be BCD and <0x75
+ if (((cdr.Param[0] & 0x0F) > 0x09) || (cdr.Param[0] > 0x99) || ((cdr.Param[1] & 0x0F) > 0x09) || (cdr.Param[1] >= 0x60) || ((cdr.Param[2] & 0x0F) > 0x09) || (cdr.Param[2] >= 0x75))
+ {
+ CDR_LOG("Invalid/out of range seek to %02X:%02X:%02X\n", cdr.Param[0], cdr.Param[1], cdr.Param[2]);
+ }
+ else
+ {
+ for (i = 0; i < 3; i++)
+ {
+ set_loc[i] = btoi(cdr.Param[i]);
+ }
- memcpy(cdr.SetSector, set_loc, 3);
- cdr.SetSector[3] = 0;
- cdr.SetlocPending = 1;
+ i = msf2sec(cdr.SetSectorPlay);
+ i = abs(i - msf2sec(set_loc));
+ if (i > 16)
+ cdr.Seeked = SEEK_PENDING;
+
+ memcpy(cdr.SetSector, set_loc, 3);
+ cdr.SetSector[3] = 0;
+ cdr.SetlocPending = 1;
+ }