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fb flag fixes

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This commit is contained in:
Angelo Salese 2012-08-24 01:46:20 +00:00
parent 21dae3682c
commit 35dd8a910d
1 changed files with 6 additions and 7 deletions
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13
src/mess/drivers/vboy.c
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@ -758,16 +758,13 @@ READ16_MEMBER( vboy_state::vip_r )
//printf("%d\n",row_num);
res = m_vip_regs.XPSTTS & 0x00f3; // empty ^^'
if(m_vip_regs.XPCTRL & 2 && m_row_num > 224/8) // screen active
res |= m_drawfb << 2;
res |= m_drawfb << 2;
if(m_row_num < 224/8)
{
res |= 0x8000;
res |= m_row_num<<8;
}
//if(m_vip_regs.DPCTRL & 2)
// res |= ((row_num)<<8);
return res;
}
@ -1224,19 +1221,21 @@ void vboy_state::m_scanline_tick(int scanline, UINT8 screen_type)
if(scanline == 224)
{
m_drawfb = 3;
if(m_displayfb)
m_drawfb = 1;
else
m_drawfb = 2;
m_set_irq(0x4000); // XPEND
}
if(scanline == 232)
{
m_drawfb &= ~1;
m_drawfb = 0;
m_set_irq(0x0002); // LFBEND
}
if(scanline == 240)
{
m_drawfb &= ~2;
m_set_irq(0x0004); // RFBEND
}