WORDSYNC all zeros check tweak.

diff --git a/disk.cpp b/disk.cpp
index f2680be467dcb0dadbd65e79d6ecefeeb131d00d..6855bebecacbd97ab0995c5913ad3cc4cd992d2a 100644 (file)
--- a/disk.cpp
+++ b/disk.cpp
@@ -3427,13 +3427,14 @@ static void disk_doupdate_read_nothing (int floppybits)
        }
 }
 
-static void wordsync_detected(void)
+static void wordsync_detected(bool startup)
 {
        dsksync_cycles = get_cycles() + WORDSYNC_TIME * CYCLE_UNIT;
        if (dskdmaen != DSKDMA_OFF) {
                if (disk_debug_logging && dma_enable == 0)
                        write_log(_T("Sync match %04x\n"), dsksync);
-               dma_enable = 1;
+               if (!startup)
+                       dma_enable = 1;
                INTREQ(0x8000 | 0x1000);
        }
        if (adkcon & 0x400) {
@@ -3517,7 +3518,7 @@ static void disk_doupdate_read (drive * drv, int floppybits)
                        dskbytr_val |= 0x8000;
                }
                if (word == dsksync)
-                       wordsync_detected();
+                       wordsync_detected(false);
                bitoffset++;
                bitoffset &= 15;
                floppybits -= drv->trackspeed;
@@ -3605,7 +3606,7 @@ static void DISK_start (void)
        }
        dma_enable = (adkcon & 0x400) ? 0 : 1;
        if (word == dsksync)
-               wordsync_detected();
+               wordsync_detected(true);
 }
 
 static int linecounter;