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i8085: Add opcode space (nw)

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This commit is contained in:
AJR 2017-10-22 21:07:42 -04:00
parent 6387bfd6b0
commit c00cf73900
2 changed files with 10 additions and 2 deletions
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10
src/devices/cpu/i8085/i8085.cpp
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@ -210,6 +210,7 @@ i8085a_cpu_device::i8085a_cpu_device(const machine_config &mconfig, device_type
: cpu_device(mconfig, type, tag, owner, clock)
, m_program_config("program", ENDIANNESS_LITTLE, 8, 16, 0)
, m_io_config("io", ENDIANNESS_LITTLE, 8, 8, 0)
, m_opcode_config("opcodes", ENDIANNESS_LITTLE, 8, 16, 0)
, m_out_status_func(*this)
, m_out_inte_func(*this)
, m_in_sid_func(*this)
@ -230,7 +231,11 @@ i8080a_cpu_device::i8080a_cpu_device(const machine_config &mconfig, const char *
device_memory_interface::space_config_vector i8085a_cpu_device::memory_space_config() const
{
return space_config_vector {
return has_configured_map(AS_OPCODES) ? space_config_vector {
std::make_pair(AS_PROGRAM, &m_program_config),
std::make_pair(AS_IO, &m_io_config),
std::make_pair(AS_OPCODES, &m_opcode_config)
} : space_config_vector {
std::make_pair(AS_PROGRAM, &m_program_config),
std::make_pair(AS_IO, &m_io_config)
};
@ -333,6 +338,7 @@ void i8085a_cpu_device::device_start()
m_program = &space(AS_PROGRAM);
m_direct = &m_program->direct();
m_opcode_direct = has_space(AS_OPCODES) ? &space(AS_OPCODES).direct() : m_direct;
m_io = &space(AS_IO);
/* resolve callbacks */
@ -670,7 +676,7 @@ PAIR i8085a_cpu_device::read_arg16()
u8 i8085a_cpu_device::read_op()
{
set_status(0xa2); // instruction fetch
return m_direct->read_byte(m_PC.w.l++);
return m_opcode_direct->read_byte(m_PC.w.l++);
}
u8 i8085a_cpu_device::read_mem(u32 a)

2
src/devices/cpu/i8085/i8085.h
View File

@ -114,6 +114,7 @@ protected:
private:
address_space_config m_program_config;
address_space_config m_io_config;
address_space_config m_opcode_config;
devcb_write8 m_out_status_func;
devcb_write_line m_out_inte_func;
@ -141,6 +142,7 @@ private:
address_space *m_program;
direct_read_data *m_direct;
direct_read_data *m_opcode_direct;
address_space *m_io;
int m_icount;