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Diffstat (limited to 'src/emu/video/pc_vga.c')
-rw-r--r--src/emu/video/pc_vga.c24
1 files changed, 22 insertions, 2 deletions
diff --git a/src/emu/video/pc_vga.c b/src/emu/video/pc_vga.c
index 54458c9338d..a7b6b935e62 100644
--- a/src/emu/video/pc_vga.c
+++ b/src/emu/video/pc_vga.c
@@ -198,6 +198,27 @@ mach8_device::mach8_device(const machine_config &mconfig, const char *tag, devic
{
}
+// zero everything, keep vtbls
+void vga_device::zero()
+{
+ memset(&vga.svga_intf, 0, sizeof(vga.svga_intf));
+ vga.memory.resize(0);
+ memset(vga.pens, 0, sizeof(vga.pens));
+ vga.miscellaneous_output = 0;
+ vga.feature_control = 0;
+ memset(&vga.sequencer, 0, sizeof(vga.sequencer));
+ memset(&vga.crtc, 0, sizeof(vga.crtc));
+ memset(&vga.gc, 0, sizeof(vga.gc));
+ memset(&vga.attribute, 0, sizeof(vga.attribute));
+ memset(&vga.dac, 0, sizeof(vga.dac));
+ memset(&vga.oak, 0, sizeof(vga.oak));
+}
+
+void svga_device::zero()
+{
+ vga_device::zero();
+ memset(&svga, 0, sizeof(svga));
+}
/* VBLANK callback, start address definitely updates AT vblank, not before. */
TIMER_CALLBACK_MEMBER(vga_device::vblank_timer_cb)
@@ -208,8 +229,7 @@ TIMER_CALLBACK_MEMBER(vga_device::vblank_timer_cb)
void vga_device::device_start()
{
- // FIXME: this kills the vga.memory vptr
- memset(&vga, 0, sizeof(vga));
+ zero();
int i;
for (i = 0; i < 0x100; i++)