Check MPEG cartridge status (blocking).
- Parameters
-
| dummy | Reserved parameter - must always be 0 |
- Returns
- Positive value if MPEG cartridge is present and operational, negative value on error or if no MPEG cartridge is installed
Calls the BIOS entry at 0x6000274. This function blocks until the check completes. Must be called after every disc swap (CD door open) and after a CD block soft reset.
- Note
- Do not call during SCU-DMA transfers (A-bus conflict). If the check fails, retry once before treating as a permanent failure.
