// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
MOS Technology 8722 Memory Management Unit emulation
**********************************************************************
_____ _____
Vdd 1 |* \_/ | 48 SENSE40
_RESET 2 | | 47 (MS3) 128/64
TA15 3 | | 46 _EXROM
TA14 4 | | 45 _GAME
TA13 5 | | 44 FSDIR
TA12 6 | | 43 _Z80EN
TA11 7 | | 42 D7
TA10 8 | | 41 D6
TA9 9 | | 40 D5
TA8 10 | | 39 D4
_CAS1 11 | | 38 D3
_CAS0 12 | MOS8722 | 37 D2
I/O SEL (MS2) 13 | | 36 D1
ROMBANK1 (MS1) 14 | | 35 D0
ROMBANK0 (MS0) 15 | | 34 Vss
AEC 16 | | 33 phi0
MUX 17 | | 32 R/_W
A0 18 | | 31 A15
A1 19 | | 30 A14
A2 20 | | 29 A13
A3 21 | | 28 A12
A4/A5 22 | | 27 A11
A6/A7 23 | | 26 A10
A8 24 |_____________| 25 A9
**********************************************************************/
#pragma once
#ifndef __MOS8722__
#define __MOS8722__
#include "emu.h"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_MOS8722_Z80EN_CALLBACK(_write) \
devcb = &mos8722_device::set_z80en_wr_callback(*device, DEVCB_##_write);
#define MCFG_MOS8722_FSDIR_CALLBACK(_write) \
devcb = &mos8722_device::set_fsdir_wr_callback(*device, DEVCB_##_write);
#define MCFG_MOS8722_GAME_CALLBACK(_read) \
devcb = &mos8722_device::set_game_rd_callback(*device, DEVCB_##_read);
#define MCFG_MOS8722_EXROM_CALLBACK(_read) \
devcb = &mos8722_device::set_exrom_rd_callback(*device, DEVCB_##_read);
#define MCFG_MOS8722_SENSE40_CALLBACK(_read) \
devcb = &mos8722_device::set_sense40_rd_callback(*device, DEVCB_##_read);
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> mos8722_device
class mos8722_device : public device_t
{
public:
// construction/destruction
mos8722_device(const machine_config &mconfig, std::string tag, device_t *owner, UINT32 clock);
template<class _Object> static devcb_base &set_z80en_wr_callback(device_t &device, _Object object) { return downcast<mos8722_device &>(device).m_write_z80en.set_callback(object); }
template<class _Object> static devcb_base &set_fsdir_wr_callback(device_t &device, _Object object) { return downcast<mos8722_device &>(device).m_write_fsdir.set_callback(object); }
template<class _Object> static devcb_base &set_game_rd_callback(device_t &device, _Object object) { return downcast<mos8722_device &>(device).m_read_game.set_callback(object); }
template<class _Object> static devcb_base &set_exrom_rd_callback(device_t &device, _Object object) { return downcast<mos8722_device &>(device).m_read_exrom.set_callback(object); }
template<class _Object> static devcb_base &set_sense40_rd_callback(device_t &device, _Object object) { return downcast<mos8722_device &>(device).m_read_sense40.set_callback(object); }
UINT8 read(offs_t offset, UINT8 data);
DECLARE_WRITE8_MEMBER( write );
DECLARE_READ_LINE_MEMBER( fsdir_r );
offs_t ta_r(offs_t offset, int aec, int *ms0, int *ms1, int *ms2, int *ms3, int *cas0, int *cas1);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
private:
enum
{
CR = 0,
PCRA, LCRA = PCRA,
PCRB, LCRB = PCRB,
PCRC, LCRC = PCRC,
PCRD, LCRD = PCRD,
MCR,
RCR,
P0L,
P0H,
P1L,
P1H,
VR
};
enum
{
CR_IO_SYSTEM_IO = 0,
CR_IO_HI_ROM
};
enum
{
CR_ROM_SYSTEM_ROM = 0,
CR_ROM_INT_FUNC_ROM,
CR_ROM_EXT_FUNC_ROM,
CR_ROM_RAM
};
enum
{
RCR_SHARE_1K = 0,
RCR_SHARE_4K,
RCR_SHARE_8K,
RCR_SHARE_16K
};
devcb_write_line m_write_z80en;
devcb_write_line m_write_fsdir;
devcb_read_line m_read_game;
devcb_read_line m_read_exrom;
devcb_read_line m_read_sense40;
UINT8 m_reg[16];
UINT8 m_p0h_latch;
UINT8 m_p1h_latch;
};
// device type definition
extern const device_type MOS8722;
#endif