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pc_vga.cpp: avoid crash in a10cuba (nw)

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This commit is contained in:
angelosa 2017-12-29 13:17:26 +01:00
parent 285af40b9f
commit cd1d561253
1 changed files with 3 additions and 2 deletions
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5
src/devices/video/pc_vga.cpp
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@ -2194,12 +2194,12 @@ WRITE8_MEMBER(vga_device::mem_w)
READ8_MEMBER(vga_device::mem_linear_r)
{
return vga.memory[offset];
return vga.memory[offset % vga.svga_intf.vram_size];
}
WRITE8_MEMBER(vga_device::mem_linear_w)
{
vga.memory[offset] = data;
vga.memory[offset % vga.svga_intf.vram_size] = data;
}
MACHINE_CONFIG_START( pcvideo_vga )
@ -3867,6 +3867,7 @@ WRITE16_MEMBER(ibm8514a_device::ibm8514_cmd_w)
ibm8514.gpbusy = false;
break;
case 0xc000: // BitBLT
// TODO: a10cuba sets up blantantly invalid parameters here, CPU core bug maybe?
if(LOG_8514) logerror("8514/A: Command (%04x) - BitBLT from %i,%i to %i,%i Width: %i Height: %i\n",ibm8514.current_cmd,
ibm8514.curr_x,ibm8514.curr_y,ibm8514.dest_x,ibm8514.dest_y,ibm8514.rect_width,ibm8514.rect_height);
off = 0;