PSX: match user_io buffer size to chd hunk size

2024-03-12 19:53:45 -04:00
parent 3a0d20577e
commit 9d7f739e34
3 changed files with 17 additions and 0 deletions
--- a/user_io.cpp
+++ b/user_io.cpp
@@ -3118,6 +3118,13 @@ void user_io_poll()
 			else if (op & 1)
 			{
 				uint32_t buf_n = sizeof(buffer[0]) / blksz;
+				int psx_blksz = 0;
+				if (is_psx() && blksz == 2352)
+				{
+					//returns 0 if the mounted disk is not a chd, otherwise returns the chd hunksize in bytes
+					psx_blksz = psx_chd_hunksize();
+					if (psx_blksz && psx_blksz <= sizeof(buffer[0])) buf_n = psx_blksz / blksz;
+				}
 				//printf("SD RD (%llu,%d) on %d, WIDE=%d\n", lba, blksz, disk, fio_size);

 				int done = 0;