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/*****************************************************************************
8-bit memory accessors
*****************************************************************************/
#ifdef I8086
#if (HAS_I8088||HAS_I80188)
static UINT16 read_word_8(offs_t addr)
{
UINT16 result = program_read_byte_8(addr);
return result | (program_read_byte_8(addr + 1) << 8);
}
static void write_word_8(offs_t addr, UINT16 data)
{
program_write_byte_8(addr, data);
program_write_byte_8(addr + 1, data >> 8);
}
static UINT16 read_port_word_8(offs_t addr)
{
UINT16 result = io_read_byte_8(addr);
return result | (io_read_byte_8(addr + 1) << 8);
}
static void write_port_word_8(offs_t addr, UINT16 data)
{
io_write_byte_8(addr, data);
io_write_byte_8(addr + 1, data >> 8);
}
static void configure_memory_8bit(void)
{
I.mem.fetch_xor = 0;
I.mem.rbyte = program_read_byte_8;
I.mem.rword = read_word_8;
I.mem.wbyte = program_write_byte_8;
I.mem.wword = write_word_8;
I.mem.rbyte_port = io_read_byte_8;
I.mem.rword_port = read_port_word_8;
I.mem.wbyte_port = io_write_byte_8;
I.mem.wword_port = write_port_word_8;
}
#endif
#endif
/*****************************************************************************
16-bit memory accessors
*****************************************************************************/
static UINT16 read_word_16le(offs_t addr)
{
if (!(addr & 1))
return program_read_word_16le(addr);
else
{
UINT16 result = program_read_byte_16le(addr);
return result | (program_read_byte_16le(addr + 1) << 8);
}
}
static void write_word_16le(offs_t addr, UINT16 data)
{
if (!(addr & 1))
program_write_word_16le(addr, data);
else
{
program_write_byte_16le(addr, data);
program_write_byte_16le(addr + 1, data >> 8);
}
}
static UINT16 read_port_word_16le(offs_t addr)
{
if (!(addr & 1))
return io_read_word_16le(addr);
else
{
UINT16 result = io_read_byte_16le(addr);
return result | (io_read_byte_16le(addr + 1) << 8);
}
}
static void write_port_word_16le(offs_t addr, UINT16 data)
{
if (!(addr & 1))
io_write_word_16le(addr, data);
else
{
io_write_byte_16le(addr, data);
io_write_byte_16le(addr + 1, data >> 8);
}
}
static void configure_memory_16bit(void)
{
I.mem.fetch_xor = BYTE_XOR_LE(0);
I.mem.rbyte = program_read_byte_16le;
I.mem.rword = read_word_16le;
I.mem.wbyte = program_write_byte_16le;
I.mem.wword = write_word_16le;
I.mem.rbyte_port = io_read_byte_16le;
I.mem.rword_port = read_port_word_16le;
I.mem.wbyte_port = io_write_byte_16le;
I.mem.wword_port = write_port_word_16le;
}
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