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specpdq: Fix backwards copy [O. Galibert]

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This commit is contained in:
Olivier Galibert 2019-01-03 22:17:53 +01:00
parent b0b23cb386
commit 2b60795780
1 changed files with 23 additions and 4 deletions
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27
src/devices/bus/nubus/nubus_specpdq.cpp
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@ -431,7 +431,7 @@ WRITE32_MEMBER( nubus_specpdq_device::specpdq_w )
}
}
}
else if ((data == 0x101) || (data == 0x100))
else if (data == 0x100)
{
int x, y;
uint8_t *vram = &m_vram[m_vram_addr & ~3];
@ -440,7 +440,7 @@ WRITE32_MEMBER( nubus_specpdq_device::specpdq_w )
int sdx = m_vram_addr & 3;
int ddx = m_vram_src & 3;
logerror("Copy rectangle, width %d height %d src %x dst %x\n", m_width, m_height, m_vram_addr, m_vram_src);
logerror("Copy rectangle forwards, width %d height %d src %x dst %x mode %03x\n", m_width, m_height, m_vram_addr, m_vram_src, data);
for (y = 0; y < m_height; y++)
{
@ -449,8 +449,27 @@ WRITE32_MEMBER( nubus_specpdq_device::specpdq_w )
vram[(y * 1152)+BYTE4_XOR_BE(x + ddx)] = vramsrc[(y * 1152)+BYTE4_XOR_BE(x + sdx)];
}
}
(void)vramsrc;
(void)sdx;
(void)vramsrc; (void)sdx;
}
else if (data == 0x101)
{
int x, y;
uint8_t *vram = &m_vram[m_vram_addr & ~3];
uint8_t *vramsrc = &m_vram[m_vram_src & ~3];
int sdx = m_vram_addr & 3;
int ddx = m_vram_src & 3;
logerror("Copy rectangle backwards, width %d height %d src %x dst %x mode %03x\n", m_width, m_height, m_vram_addr, m_vram_src, data);
for (y = 0; y < m_height; y++)
{
for (x = 0; x < m_width; x++)
{
vram[(-y * 1152)+BYTE4_XOR_BE(-x + ddx)] = vramsrc[(-y * 1152)+BYTE4_XOR_BE(-x + sdx)];
}
}
(void)vramsrc; (void)sdx;
}
else
{