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apple/dafb.cpp: Minor cleanups. [R. Belmont]

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This commit is contained in:
arbee 2023-07-05 14:40:53 -04:00
parent c48fc350c5
commit c0d2bb5596
1 changed files with 16 additions and 6 deletions
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22
src/mame/apple/dafb.cpp
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@ -179,7 +179,8 @@ u32 dafb_base::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const
auto const vram8 = util::big_endian_cast<u8 const>(&m_vram[0]) + m_base;
const pen_t *pens = m_palette->pens();
if (m_swatch_mode & 1)
// check display disable
if (BIT(m_swatch_mode, 0))
{
return 0;
}
@ -484,13 +485,19 @@ u32 dafb_base::swatch_r(offs_t offset)
return m_int_status;
case 0xc: // clear cursor scanline int
m_int_status &= ~4;
recalc_ints();
if (!machine().side_effects_disabled())
{
m_int_status &= ~4;
recalc_ints();
}
break;
case 0x14: // clear VBL int
m_int_status &= ~1;
recalc_ints();
if (!machine().side_effects_disabled())
{
m_int_status &= ~1;
recalc_ints();
}
break;
case 0x20: // unused register, used by the driver to stash data
@ -596,7 +603,10 @@ u32 dafb_base::ac842_r(offs_t offset)
case 0x10:
{
pen_t entry = m_palette->pen(m_pal_address);
m_pal_idx++;
if (!machine().side_effects_disabled())
{
m_pal_idx++;
}
switch (m_pal_idx - 1)
{
case 0: