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diff --git a/hw/display/vga.c b/hw/display/vga.c
index b35d523..78a427c 100644
--- a/hw/display/vga.c
+++ b/hw/display/vga.c
@@ -282,6 +282,42 @@ static void vga_precise_update_retrace_info(VGACommonState *s)
#endif
}
+
+/*
+ * Super budget code to capture the timex data
+ * we configure the timex software to use int 10 mode 12h
+ * which is 640x480x4.
+ *
+ * If windows reads the vertical retrace register, and
+ * gets the answer "1", we then check if the first few
+ * bytes of video ram are zero (indicating the a black screen)
+ * if it is we then dump the first byte of each scan line
+ * to a file.
+ *
+ */
+
+static void
+timex_hook (VGACommonState * s)
+{
+ static FILE *f;
+ unsigned i;
+
+ if (!f)
+ f = fopen ("timex.dat", "w");
+
+ /* If the start of the screen isn't black */
+ for (i = 0; i < 8; ++i)
+ if (s->vram_ptr[i])
+ return;
+
+ fprintf (f, "#\n");
+
+ for (i = 0; i < 480; ++i)
+ fprintf (f, "%d\n", s->vram_ptr[i * 320]);
+
+ fflush (f);
+}
+
static uint8_t vga_precise_retrace(VGACommonState *s)
{
struct vga_precise_retrace *r = &s->retrace_info.precise;
@@ -297,6 +333,7 @@ static uint8_t vga_precise_retrace(VGACommonState *s)
cur_line = cur_char / r->htotal;
if (cur_line >= r->vstart && cur_line <= r->vend) {
+ timex_hook(s);
val |= ST01_V_RETRACE | ST01_DISP_ENABLE;
} else {
cur_line_char = cur_char % r->htotal;
diff --git a/vl.c b/vl.c
index 6b73934..276baa3 100644
--- a/vl.c
+++ b/vl.c
@@ -129,7 +129,7 @@ int main(int argc, char **argv)
static const char *data_dir[16];
static int data_dir_idx;
const char *bios_name = NULL;
-enum vga_retrace_method vga_retrace_method = VGA_RETRACE_DUMB;
+enum vga_retrace_method vga_retrace_method = VGA_RETRACE_PRECISE;
DisplayType display_type = DT_DEFAULT;
int request_opengl = -1;
int display_opengl;
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