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// license:BSD-3-Clause
// copyright-holders:Peter Trauner
/*****************************************************************************
*
* cpustate->h
* portable lh5801 emulator interface
*
*
*****************************************************************************/
#pragma once
#ifndef __LH5801_H__
#define __LH5801_H__
/*
lh5801
little endian
ph, pl p
sh, sl s
xh, xl x
yh, yl y
uh, ul u
a A
0 0 0 H V Z IE C
TM 9bit polynominal?
pu pv disp flipflops
bf flipflop (break key connected)
me0, me1 chip select for 2 64kb memory blocks
in0-in7 input pins
mi maskable interrupt input (fff8/9)
timer fffa/b
nmi non .. (fffc/d)
reset fffe/f
e ?
lh5811 chip
pa 8bit io
pb 8bit io
pc 8bit
*/
// input lines
enum
{
LH5801_LINE_MI //maskable interrupt
};
#define MCFG_LH5801_IN(_devcb) \
lh5801_cpu_device::set_in_func(*device, DEVCB_##_devcb);
class lh5801_cpu_device : public cpu_device
{
public:
// construction/destruction
lh5801_cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// static configuration helpers
template<class _Object> static devcb_base &set_in_func(device_t &device, _Object object) { return downcast<lh5801_cpu_device &>(device).m_in_func.set_callback(object); }
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// device_execute_interface overrides
virtual UINT32 execute_min_cycles() const override { return 2; }
virtual UINT32 execute_max_cycles() const override { return 19; }
virtual UINT32 execute_input_lines() const override { return 2; }
virtual UINT32 execute_default_irq_vector() const override { return 0; }
virtual void execute_run() override;
virtual void execute_set_input(int inputnum, int state) override;
// device_memory_interface overrides
virtual const address_space_config *memory_space_config(address_spacenum spacenum = AS_0) const override { return (spacenum == AS_PROGRAM) ? &m_program_config : ( (spacenum == AS_IO) ? &m_io_config : nullptr ); }
// device_state_interface overrides
virtual void state_string_export(const device_state_entry &entry, std::string &str) override;
// device_disasm_interface overrides
virtual UINT32 disasm_min_opcode_bytes() const override { return 1; }
virtual UINT32 disasm_max_opcode_bytes() const override { return 5; }
virtual offs_t disasm_disassemble(char *buffer, offs_t pc, const UINT8 *oprom, const UINT8 *opram, UINT32 options) override;
private:
address_space_config m_program_config;
address_space_config m_io_config;
devcb_read8 m_in_func;
address_space *m_program; //ME0
address_space *m_io; //ME1
direct_read_data *m_direct;
PAIR m_s;
PAIR m_p;
PAIR m_u;
PAIR m_x;
PAIR m_y;
int m_tm; //9 bit
UINT8 m_t, m_a;
int m_bf;
int m_dp;
int m_pu;
int m_pv;
UINT16 m_oldpc;
int m_irq_state;
UINT8 m_ir_flipflop[3]; //interrupt request flipflop: IR0, IR1, IR2
int m_lines_status[2]; //MI and NMI lines status
int m_idle;
int m_icount;
void check_irq();
void lh5801_instruction_fd();
void lh5801_instruction();
UINT8 lh5801_add_generic(int left, int right, int carry);
UINT16 lh5801_readop_word();
void lh5801_adc(UINT8 data);
void lh5801_add_mem(address_space &space, int addr, UINT8 data);
void lh5801_adr(PAIR *reg);
void lh5801_sbc(UINT8 data);
void lh5801_cpa(UINT8 a, UINT8 b);
UINT8 lh5801_decimaladd_generic(int left, int right, int carry);
void lh5801_dca(UINT8 data);
void lh5801_dcs(UINT8 data);
void lh5801_and(UINT8 data);
void lh5801_and_mem(address_space &space, int addr, UINT8 data);
void lh5801_bit(UINT8 a, UINT8 b);
void lh5801_eor(UINT8 data);
void lh5801_ora(UINT8 data);
void lh5801_ora_mem(address_space &space, int addr, UINT8 data);
void lh5801_lda(UINT8 data);
void lh5801_lde(PAIR *reg);
void lh5801_sde(PAIR *reg);
void lh5801_lin(PAIR *reg);
void lh5801_sin(PAIR *reg);
void lh5801_dec(UINT8 *adr);
void lh5801_inc(UINT8 *adr);
void lh5801_pop();
void lh5801_pop_word(PAIR *reg);
void lh5801_rtn();
void lh5801_rti();
void lh5801_push(UINT8 data);
void lh5801_push_word(UINT16 data);
void lh5801_jmp(UINT16 adr);
void lh5801_branch_plus(int doit);
void lh5801_branch_minus(int doit);
void lh5801_lop();
void lh5801_sjp();
void lh5801_vector(int doit, int nr);
void lh5801_aex();
void lh5801_drl(address_space &space, int adr);
void lh5801_drr(address_space &space, int adr);
void lh5801_rol();
void lh5801_ror();
void lh5801_shl();
void lh5801_shr();
void lh5801_am(int value);
void lh5801_ita();
};
extern const device_type LH5801;
#endif /* __LH5801_H__ */
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