1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
// license:BSD-3-Clause
// copyright-holders:Juergen Buchmueller
/**********************************************************************
Rockwell 10788 General Purpose Keyboard and Display circuit
Juergen Buchmueller <pullmoll@t-online.de>
The device decodes reads/write to a 16 byte I/O range defined
by three wired inputs SC5, SC6 and SC7. The range is one of
80-8f, 90-9f, ..., f0-ff depending on the wiring.
**********************************************************************/
#ifndef __R10788_H__
#define __R10788_H__
#include "device.h"
/*************************************
*
* Device configuration macros
*
*************************************/
/* Set the writer used to update a display digit */
#define MCFG_R10788_UPDATE(_devcb) \
r10788_device::set_update(*device, DEVCB_##_devcb);
class r10788_device : public device_t
{
public:
r10788_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~r10788_device() {}
enum {
KTR = 0xc, //!< Transfer Keyboard Return
KTS = 0xa, //!< Transfer Keyboard Strobe
KLA = 0xe, //!< Load Display Register A
KLB = 0xd, //!< Load Display Register B
KDN = 0x3, //!< Turn On Display
KAF = 0xb, //!< Turn Off A
KBF = 0x7, //!< Turn Off B
KER = 0x6 //!< Reset Keyboard Error
};
DECLARE_READ8_MEMBER ( io_r );
DECLARE_WRITE8_MEMBER( io_w );
template<class _Object> static devcb_base &set_update(device_t &device, _Object object) { return downcast<r10788_device &>(device).m_display.set_callback(object); }
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
private:
static const device_timer_id TIMER_DISPLAY = 0;
UINT8 m_reg[2][16]; //!< display registers
UINT8 m_ktr; //!< transfer keyboard return value
UINT8 m_kts; //!< transfer keyboard strobe value
UINT8 m_kla; //!< display register A value
UINT8 m_klb; //!< display register B value
UINT8 m_mask_a; //!< display enable bits for A
UINT8 m_mask_b; //!< display enable bits for B
UINT8 m_ker; //!< keyboard error value
int m_io_counter; //!< current I/O register index
int m_scan_counter; //!< current display scan
devcb_write8 m_display; //!< display updater
emu_timer* m_timer; //!< timer running at clock / 18 / 36
};
extern const device_type R10788;
#endif /* __R10788_H__ */
|