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upd7220: d1 is also signed (nw)

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This commit is contained in:
cracyc 2016-11-21 09:16:38 -06:00
parent 9b2e44723c
commit 96802e527f
1 changed files with 2 additions and 1 deletions
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3
src/devices/video/upd7220.cpp
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@ -816,6 +816,7 @@ void upd7220_device::draw_line(int x, int y)
{ {
int xi, yi; int xi, yi;
int d = (m_figs.m_d & 0x2000) ? (int16_t)(m_figs.m_d | 0xe000) : m_figs.m_d; int d = (m_figs.m_d & 0x2000) ? (int16_t)(m_figs.m_d | 0xe000) : m_figs.m_d;
int d1 = (m_figs.m_d1 & 0x2000) ? (int16_t)(m_figs.m_d1 | 0xe000) : m_figs.m_d1;
int d2 = (m_figs.m_d2 & 0x2000) ? (int16_t)(m_figs.m_d2 | 0xe000) : m_figs.m_d2; int d2 = (m_figs.m_d2 & 0x2000) ? (int16_t)(m_figs.m_d2 | 0xe000) : m_figs.m_d2;
uint16_t pattern = (m_ra[8]) | (m_ra[9]<<8); uint16_t pattern = (m_ra[8]) | (m_ra[9]<<8);
const int dot_dir[4] = {1, -1, -1, 1}; const int dot_dir[4] = {1, -1, -1, 1};
@ -840,7 +841,7 @@ void upd7220_device::draw_line(int x, int y)
d += d2; d += d2;
} }
else else
d += m_figs.m_d1; d += d1;
} }
switch(m_figs.m_dir & 3) switch(m_figs.m_dir & 3)