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Diffstat (limited to 'src/devices/video/voodoo.cpp')
-rw-r--r--src/devices/video/voodoo.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/devices/video/voodoo.cpp b/src/devices/video/voodoo.cpp
index 180a8d454c3..2b57e67e3de 100644
--- a/src/devices/video/voodoo.cpp
+++ b/src/devices/video/voodoo.cpp
@@ -3129,7 +3129,7 @@ int32_t voodoo_device::register_w(voodoo_device *vd, offs_t offset, uint32_t dat
attoseconds_t refresh = vd->m_screen->frame_period().attoseconds();
attoseconds_t stdperiod, medperiod, vgaperiod;
attoseconds_t stddiff, meddiff, vgadiff;
- rectangle visarea;
+ rectangle visarea;
if (vd->vd_type == TYPE_VOODOO_2)
{
@@ -3151,7 +3151,7 @@ int32_t voodoo_device::register_w(voodoo_device *vd, offs_t offset, uint32_t dat
}
/* create a new visarea */
- visarea.set(hbp, hbp + hvis - 1, vbp, vbp + vvis - 1);
+ visarea.set(hbp, hbp + std::max(hvis - 1, 0), vbp, vbp + std::max(vvis - 1, 0));
/* keep within bounds */
visarea.max_x = (std::min)(visarea.max_x, htotal - 1);