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z8000: fix m20 word io writes

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This commit is contained in:
cracyc 2023-02-09 12:14:55 -06:00
parent ab56f7de85
commit a924a9a5d5
2 changed files with 4 additions and 4 deletions
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4
src/devices/cpu/z8000/z8000.cpp
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@ -252,7 +252,7 @@ uint16_t z8002_device::RDPORT_W(int mode, uint16_t addr)
{ {
memory_access<16, 1, 0, ENDIANNESS_BIG>::specific &space = (mode == 0) ? m_io : m_sio; memory_access<16, 1, 0, ENDIANNESS_BIG>::specific &space = (mode == 0) ? m_io : m_sio;
if (BIT(addr, 0)) if (BIT(addr, 0))
return swapendian_int16(space.read_word(addr & ~1, 0x00ff)); return swapendian_int16(space.read_word(addr & ~1, 0xffff));
else else
return space.read_word(addr); return space.read_word(addr);
} }
@ -268,7 +268,7 @@ void z8002_device::WRPORT_W(int mode, uint16_t addr, uint16_t value)
{ {
memory_access<16, 1, 0, ENDIANNESS_BIG>::specific &space = (mode == 0) ? m_io : m_sio; memory_access<16, 1, 0, ENDIANNESS_BIG>::specific &space = (mode == 0) ? m_io : m_sio;
if (BIT(addr, 0)) if (BIT(addr, 0))
space.write_word(addr & ~1, swapendian_int16(value), 0x00ff); space.write_word(addr & ~1, swapendian_int16(value), 0xffff);
else else
space.write_word(addr, value, 0xffff); space.write_word(addr, value, 0xffff);
} }

4
src/mame/olivetti/m24_z8000.cpp
View File

@ -158,13 +158,13 @@ void m24_z8000_device::dmem_w(offs_t offset, uint16_t data, uint16_t mem_mask)
uint16_t m24_z8000_device::i86_io_r(offs_t offset, uint16_t mem_mask) uint16_t m24_z8000_device::i86_io_r(offs_t offset, uint16_t mem_mask)
{ {
uint16_t ret = m_maincpu->space(AS_IO).read_word(offset << 1, swapendian_int16(mem_mask)); uint16_t ret = m_maincpu->space(AS_IO).read_word(offset << 1, mem_mask == 0xffff ? 0xff00 : swapendian_int16(mem_mask));
return swapendian_int16(ret); return swapendian_int16(ret);
} }
void m24_z8000_device::i86_io_w(offs_t offset, uint16_t data, uint16_t mem_mask) void m24_z8000_device::i86_io_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{ {
m_maincpu->space(AS_IO).write_word(offset << 1, swapendian_int16(data), swapendian_int16(mem_mask)); m_maincpu->space(AS_IO).write_word(offset << 1, swapendian_int16(data), mem_mask == 0xffff ? 0xff00 : swapendian_int16(mem_mask));
} }
void m24_z8000_device::irqctl_w(uint8_t data) void m24_z8000_device::irqctl_w(uint8_t data)