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namconb1: Making the clip registers signed, fixes vshoot MT#6789. The underlying issue may be weirder though...

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This commit is contained in:
Olivier Galibert 2021-03-18 15:44:56 +01:00
parent 866a814e9f
commit 1e0c736f53
1 changed files with 5 additions and 4 deletions
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9
src/mame/video/namconb1.cpp
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@ -124,10 +124,11 @@ u32 namconb1_state::screen_update_namconb1(screen_device &screen, bitmap_ind16 &
/* compute window for custom screen blanking */
rectangle clip;
//004a 016a 0021 0101 0144 0020 (nebulas ray)
clip.min_x = m_c116->get_reg(0) - 0x4a;
clip.max_x = m_c116->get_reg(1) - 0x4a - 1;
clip.min_y = m_c116->get_reg(2) - 0x21;
clip.max_y = m_c116->get_reg(3) - 0x21 - 1;
clip.min_x = int16_t(m_c116->get_reg(0)) - 0x4a;
clip.max_x = int16_t(m_c116->get_reg(1)) - 0x4a - 1;
clip.min_y = int16_t(m_c116->get_reg(2)) - 0x21;
clip.max_y = int16_t(m_c116->get_reg(3)) - 0x21 - 1;
/* intersect with master clip rectangle */
clip &= cliprect;