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simplify calculation (nw)

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This commit is contained in:
Vas Crabb 2017-11-19 05:08:33 +11:00
parent ed7ef7d1b2
commit 2fdb41658e
1 changed files with 2 additions and 4 deletions
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6
src/mame/drivers/univac.cpp
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@ -92,14 +92,12 @@ WRITE8_MEMBER( univac_state::port43_w )
READ8_MEMBER( univac_state::vram_r )
{
offs_t offs = (offset & 0x1fff) ^ (BIT(offset, 13) ? 0x2000 : 0) ^ (m_screen_num ? 0x2000 : 0);
return m_p_videoram[offs];
return m_p_videoram[offset ^ (m_screen_num ? 0x2000 : 0)];
}
WRITE8_MEMBER( univac_state::vram_w )
{
offs_t offs = (offset & 0x1fff) ^ (BIT(offset, 13) ? 0x2000 : 0) ^ (m_screen_num ? 0x2000 : 0);
m_p_videoram[offs] = data;
m_p_videoram[offset ^ (m_screen_num ? 0x2000 : 0)] = data;
}