cdrom: mask selector bits correctly

diff --git a/libpcsxcore/cdrom.c b/libpcsxcore/cdrom.c
index fa0e6a9..8785598 100644 (file)
--- a/libpcsxcore/cdrom.c
+++ b/libpcsxcore/cdrom.c
@@ -1450,7 +1450,7 @@ void cdrWrite0(unsigned char rt) {
 #ifdef CDR_LOG
        CDR_LOG("cdrWrite0() Log: CD0 write: %x\n", rt);
 #endif
-       cdr.Ctrl = rt | (cdr.Ctrl & ~0x3);
+       cdr.Ctrl = (rt & 3) | (cdr.Ctrl & ~3);
 
        if (rt == 0) {
                cdr.ParamP = 0;
@@ -1506,7 +1506,7 @@ void cdrWrite1(unsigned char rt) {
        }
 #endif
 
-       if (cdr.Ctrl & 0x1) return;
+       if (cdr.Ctrl & 0x3) return;
 
        switch (cdr.Cmd) {
        case CdlSync:
@@ -1861,7 +1861,7 @@ void cdrWrite2(unsigned char rt) {
                                cdr.Reg2 = rt;
                                break;
                }
-       } else if (!(cdr.Ctrl & 0x1) && cdr.ParamP < 8) {
+       } else if (!(cdr.Ctrl & 0x3) && cdr.ParamP < 8) {
                cdr.Param[cdr.ParamP++] = rt;
                cdr.ParamC++;
        }
@@ -1914,7 +1914,7 @@ void cdrWrite3(unsigned char rt) {
        }
 
 
-       if (rt == 0x07 && cdr.Ctrl & 0x1) {
+       if (rt == 0x07 && (cdr.Ctrl & 3) == 1) {
                cdr.Stat = 0;
 
                if (cdr.Irq == 0xff) {
@@ -1939,7 +1939,7 @@ void cdrWrite3(unsigned char rt) {
                return;
        }
 
-       if (rt == 0x80 && !(cdr.Ctrl & 0x1) && cdr.Readed == 0) {
+       if (rt == 0x80 && !(cdr.Ctrl & 0x3) && cdr.Readed == 0) {
                cdr.Readed = 1;
                cdr.pTransfer = cdr.Transfer;