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sun2_50: Invert endianness for 82586 access (nw)

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This commit is contained in:
AJR 2019-05-04 23:06:51 -04:00
parent 1a5e8e06e1
commit a39d99356b
1 changed files with 35 additions and 8 deletions
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43
src/mame/drivers/sun2.cpp
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@ -174,8 +174,10 @@ private:
virtual void machine_start() override;
virtual void machine_reset() override;
DECLARE_READ16_MEMBER( tl_mmu_r );
DECLARE_WRITE16_MEMBER( tl_mmu_w );
DECLARE_READ16_MEMBER( mmu_r );
DECLARE_WRITE16_MEMBER( mmu_w );
uint16_t tl_mmu_r(uint8_t fc, offs_t offset, uint16_t mem_mask);
void tl_mmu_w(uint8_t fc, offs_t offset, uint16_t data, uint16_t mem_mask);
DECLARE_READ16_MEMBER( video_ctrl_r );
DECLARE_WRITE16_MEMBER( video_ctrl_w );
DECLARE_READ16_MEMBER( ram_r );
@ -183,6 +185,8 @@ private:
uint8_t ethernet_r();
void ethernet_w(uint8_t data);
DECLARE_WRITE_LINE_MEMBER(ethernet_int_w);
uint16_t edlc_mmu_r(offs_t offset, uint16_t mem_mask);
void edlc_mmu_w(offs_t offset, uint16_t data, uint16_t mem_mask);
uint32_t bw2_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
@ -191,6 +195,7 @@ private:
void mbustype2space_map(address_map &map);
void mbustype3space_map(address_map &map);
void sun2_mem(address_map &map);
void edlc_mem(address_map &map);
void vmetype0space_map(address_map &map);
void vmetype1space_map(address_map &map);
void vmetype2space_map(address_map &map);
@ -218,10 +223,13 @@ WRITE16_MEMBER( sun2_state::ram_w )
if (offset < m_ram_size_words) COMBINE_DATA(&m_ram_ptr[offset]);
}
READ16_MEMBER( sun2_state::tl_mmu_r )
READ16_MEMBER( sun2_state::mmu_r )
{
uint8_t fc = m_maincpu->get_fc();
return tl_mmu_r(m_maincpu->get_fc(), offset, mem_mask);
}
uint16_t sun2_state::tl_mmu_r(uint8_t fc, offs_t offset, uint16_t mem_mask)
{
if ((fc == 3) && !machine().side_effects_disabled())
{
if (offset & 0x4) // set for CPU space
@ -352,10 +360,13 @@ READ16_MEMBER( sun2_state::tl_mmu_r )
return 0xffff;
}
WRITE16_MEMBER( sun2_state::tl_mmu_w )
WRITE16_MEMBER( sun2_state::mmu_w )
{
uint8_t fc = m_maincpu->get_fc();
tl_mmu_w(m_maincpu->get_fc(), offset, data, mem_mask);
}
void sun2_state::tl_mmu_w(uint8_t fc, offs_t offset, uint16_t data, uint16_t mem_mask)
{
//printf("sun2: Write %04x (FC %d, mask %04x, PC=%x) to %08x\n", data, fc, mem_mask, m_maincpu->pc(), offset<<1);
if (fc == 3)
@ -521,9 +532,25 @@ WRITE_LINE_MEMBER(sun2_state::ethernet_int_w)
}
}
uint16_t sun2_state::edlc_mmu_r(offs_t offset, uint16_t mem_mask)
{
uint16_t result = tl_mmu_r(M68K_FC_SUPERVISOR_DATA, offset, (mem_mask >> 8) | (mem_mask << 8));
return (result >> 8) | (result << 8);
}
void sun2_state::edlc_mmu_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
tl_mmu_w(M68K_FC_SUPERVISOR_DATA, offset, (data >> 8) | (data << 8), (mem_mask >> 8) | (mem_mask << 8));
}
void sun2_state::sun2_mem(address_map &map)
{
map(0x000000, 0xffffff).rw(FUNC(sun2_state::tl_mmu_r), FUNC(sun2_state::tl_mmu_w));
map(0x000000, 0xffffff).rw(FUNC(sun2_state::mmu_r), FUNC(sun2_state::mmu_w));
}
void sun2_state::edlc_mem(address_map &map)
{
map(0x000000, 0xffffff).rw(FUNC(sun2_state::edlc_mmu_r), FUNC(sun2_state::edlc_mmu_w));
}
// VME memory spaces
@ -678,7 +705,7 @@ void sun2_state::sun2vme(machine_config &config)
bwtwo.set_raw(100_MHz_XTAL, 1600, 0, 1152, 937, 0, 900);
I82586(config, m_edlc, 16_MHz_XTAL / 2);
m_edlc->set_addrmap(0, &sun2_state::sun2_mem);
m_edlc->set_addrmap(0, &sun2_state::edlc_mem);
m_edlc->out_irq_cb().set(FUNC(sun2_state::ethernet_int_w));
am9513a_device &timer(AM9513A(config, "timer", 19.6608_MHz_XTAL / 4));