// license:BSD-3-Clause
// copyright-holders:hap
/*
Texas Instruments TMS1024/TMS1025 I/O expander
*/
#ifndef _TMS1024_H_
#define _TMS1024_H_
// ports setup
// 4-bit ports (3210 = DCBA)
// valid ports: 4-7 for TMS1024, 1-7 for TMS1025
#define MCFG_TMS1025_READ_PORT_CB(X, _devcb) \
devcb = &tms1024_device::set_read_port_callback(*device, X, DEVCB_##_devcb);
#define MCFG_TMS1025_WRITE_PORT_CB(X, _devcb) \
devcb = &tms1024_device::set_write_port_callback(*device, X, DEVCB_##_devcb);
enum
{
TMS1025_PORT1 = 0,
TMS1025_PORT2,
TMS1025_PORT3,
TMS1025_PORT4,
TMS1025_PORT5,
TMS1025_PORT6,
TMS1025_PORT7
};
// pinout reference
/*
____ ____ ____ ____
Vss 1 |* \_/ | 28 H2 Vss 1 |* \_/ | 40 H2
H3 2 | | 27 H1 H3 2 | | 39 H1
H4 3 | | 26 Vdd H4 3 | | 38 Vdd
CE 4 | | 25 S2 CE 4 | | 37 S2
MS 5 | | 24 S1 MS 5 | | 36 S1
STD 6 | | 23 S0 STD 6 | | 35 S0
A4 7 | TMS1024 | 22 D7 A1 7 | | 34 D3
B4 8 | | 21 C7 B1 8 | | 33 C3
C4 9 | | 20 B7 C1 9 | | 32 B3
D4 10 | | 19 A7 D1 10 | TMS1025 | 31 A3
A5 11 | | 18 D6 A4 11 | | 30 D7
B5 12 | | 17 C6 B4 12 | | 29 C7
C5 13 | | 16 B6 C4 13 | | 28 B7
D5 14 |___________| 15 A6 D4 14 | | 27 A7
A5 15 | | 26 D6
B5 16 | | 25 C6
CE: Chip Enable C5 17 | | 24 B6
MS: Mode Select D5 18 | | 23 A6
STD: STrobe Data A2 19 | | 22 D2
S: Select B2 20 |___________| 21 C2
H: Hold?
*/
class tms1024_device : public device_t
{
public:
tms1024_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
tms1024_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, u32 clock, const char *shortname, const char *source);
// static configuration helpers
template<class _Object> static devcb_base &set_read_port_callback(device_t &device, int port, _Object &&object)
{
assert(port >= TMS1025_PORT1 && port <= TMS1025_PORT7);
return downcast<tms1024_device &>(device).m_read_port[port].set_callback(std::forward<_Object>(object));
}
template<class _Object> static devcb_base &set_write_port_callback(device_t &device, int port, _Object &&object)
{
assert(port >= TMS1025_PORT1 && port <= TMS1025_PORT7);
return downcast<tms1024_device &>(device).m_write_port[port].set_callback(std::forward<_Object>(object));
}
DECLARE_WRITE8_MEMBER(write_h);
DECLARE_READ8_MEMBER(read_h);
DECLARE_WRITE8_MEMBER(write_s);
DECLARE_WRITE_LINE_MEMBER(write_std);
DECLARE_WRITE_LINE_MEMBER(write_ms);
protected:
// device-level overrides
virtual void device_start() override;
u8 m_h; // 4-bit data latch
u8 m_s; // 3-bit port select
u8 m_std; // strobe pin
u8 m_ms; // mode select pin, default to read mode
// callbacks
devcb_read8 m_read_port[7];
devcb_write8 m_write_port[7];
};
class tms1025_device : public tms1024_device
{
public:
tms1025_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
};
extern const device_type TMS1024;
extern const device_type TMS1025;
#endif /* _TMS1024_H_ */