X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2Fcd%2FPico.c;h=013340cc884f692246193f62d6a9054f31d0e56f;hb=bf098bc53228f6b5016cb4a6126f4466bfba4e00;hp=d98795603a9dda94c3934fb2dd758d3524d2e721;hpb=672ad671130bb662f099b790fdaef4be85e6c146;p=picodrive.git

diff --git a/Pico/cd/Pico.c b/Pico/cd/Pico.c
index d987956..013340c 100644
--- a/Pico/cd/Pico.c
+++ b/Pico/cd/Pico.c
@@ -64,9 +64,22 @@ static __inline void SekRunS68k(int cyc)
 #endif
 }
 
-// TODO: tidy
-extern unsigned char m68k_regs[0x40];
-extern unsigned char s68k_regs[0x200];
+static int Status_CDC;
+
+static __inline void check_cd_dma(void)
+{
+	int ddx;
+
+	if (!(Status_CDC & 0x08)) return;
+
+	ddx = Pico_mcd->s68k_regs[4] & 7;
+	if (ddx <  2) return; // invalid
+	if (ddx <  4) Pico_mcd->s68k_regs[4] |= 0x40; // Data set ready in host port
+	if (ddx == 6) return; // invalid
+
+	Update_CDC_TRansfer(ddx); // now go and do the actual transfer
+}
+
 
 // Accurate but slower frame which does hints
 static int PicoFrameHintsMCD(void)
@@ -115,6 +128,8 @@ static int PicoFrameHintsMCD(void)
       if(Pico.m.padDelay[1]++ > 25) Pico.m.padTHPhase[1]=0;
     }
 
+    check_cd_dma();
+
     // H-Interrupts:
     if(y <= lines_vis && --hint < 0) // y <= lines_vis: Comix Zone, Golden Axe
     {