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pc9801: don't crash in 256color mode (nw)

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This commit is contained in:
cracyc 2016-01-02 21:37:08 -06:00
parent 3b50e40101
commit 39bf46219d
1 changed files with 4 additions and 8 deletions
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12
src/mame/drivers/pc9801.cpp
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@ -488,7 +488,7 @@ public:
optional_device<ata_interface_device> m_ide;
required_shared_ptr<UINT16> m_video_ram_1;
required_shared_ptr<UINT16> m_video_ram_2;
optional_shared_ptr<UINT16> m_ext_gvram;
optional_shared_ptr<UINT32> m_ext_gvram;
required_device<beep_device> m_beeper;
optional_device<ram_device> m_ram;
required_device<gfxdecode_device> m_gfxdecode;
@ -781,19 +781,15 @@ UPD7220_DISPLAY_PIXELS_MEMBER( pc9801_state::hgdc_display_pixels )
if(m_ex_video_ff[ANALOG_256_MODE])
{
UINT8 *ext_gvram = (UINT8 *)m_ext_gvram.target();
for(xi=0;xi<16;xi++)
{
res_x = x + xi;
res_y = y;
if(!m_screen->visible_area().contains(res_x, res_y*2+0))
return;
pen = ext_gvram[((address*16+xi)+(m_vram_disp*0x40000)) >> 1];
pen = m_ext_gvram[((address*16+xi)+(m_vram_disp*0x40000)) >> 1];
bitmap.pix32(res_y*2+0, res_x) = palette[pen + 0x20];
if(m_screen->visible_area().contains(res_x, res_y*2+1))
bitmap.pix32(res_y*2+1, res_x) = palette[pen + 0x20];
bitmap.pix32(res_y, res_x) = palette[pen + 0x20];
}
}
else