blob: e3010a0a4e7434de7419449096e0ad183accc1ca (
plain) (
blame)
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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/**********************************************************************
Sinclair ZX8302 emulation
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************
_____ _____
ERASE 1 |* \_/ | 40 Vdd
EXTINTL 2 | | 39 DB4
MDRDWL 3 | | 38 DB5
NETOUT 4 | | 37 DB0
BAUDX4 5 | | 36 DB1
DTR1L 6 | | 35 COMDATA
CTS2L 7 | | 34 MDSELDH
DCSML 8 | | 33 MDSELCKN
ROWL 9 | | 32 VSYNCH
PCENL 10 | ZX8302 | 31 XTAL2
Vdd 11 | ULA | 30 XTAL1
DB2 12 | | 29
TXD1 13 | | 28 RESETOUTL
TXD2 14 | | 27 DB7
A5 15 | | 26 IPL1L
NETIN 16 | | 25 CLKCPU
A1 17 | | 24 DB3
A0 18 | | 23 DB6
RAW2 19 | | 22 COMCTL
GND 20 |_____________| 21 RAW1
**********************************************************************/
#pragma once
#ifndef __ZX8302__
#define __ZX8302__
#include "emu.h"
///*************************************************************************
// MACROS / CONSTANTS
///*************************************************************************
///*************************************************************************
// INTERFACE CONFIGURATION MACROS
///*************************************************************************
#define MCFG_ZX8302_ADD(_tag, _clock, _intrf) \
MCFG_DEVICE_ADD(_tag, ZX8302, _clock) \
MCFG_DEVICE_CONFIG(_intrf)
#define ZX8302_INTERFACE(name) \
const zx8302_interface (name)=
///*************************************************************************
// TYPE DEFINITIONS
///*************************************************************************
// ======================> zx8302_interface
struct zx8302_interface
{
int rtc_clock; // the RTC clock (pin 30) of the chip
// serial
devcb_write_line out_ipl1l_cb;
devcb_write_line out_baudx4_cb;
devcb_write_line out_comdata_cb;
devcb_write_line out_txd1_cb;
devcb_write_line out_txd2_cb;
devcb_read_line in_dtr1_cb;
devcb_read_line in_cts2_cb;
devcb_write_line out_netout_cb;
devcb_read_line in_netin_cb;
// microdrive
devcb_write_line out_mdselck_cb;
devcb_write_line out_mdseld_cb;
devcb_write_line out_mdrdw_cb;
devcb_write_line out_erase_cb;
devcb_write_line out_raw1_cb;
devcb_read_line in_raw1_cb;
devcb_write_line out_raw2_cb;
devcb_read_line in_raw2_cb;
};
// ======================> zx8302_device
class zx8302_device : public device_t,
public zx8302_interface
{
public:
// construction/destruction
zx8302_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
DECLARE_READ8_MEMBER( rtc_r );
DECLARE_WRITE8_MEMBER( rtc_w );
DECLARE_WRITE8_MEMBER( control_w );
DECLARE_READ8_MEMBER( mdv_track_r );
DECLARE_READ8_MEMBER( status_r );
DECLARE_WRITE8_MEMBER( ipc_command_w );
DECLARE_WRITE8_MEMBER( mdv_control_w );
DECLARE_READ8_MEMBER( irq_status_r );
DECLARE_WRITE8_MEMBER( irq_acknowledge_w );
DECLARE_WRITE8_MEMBER( data_w );
DECLARE_WRITE_LINE_MEMBER( vsync_w );
DECLARE_WRITE_LINE_MEMBER( comctl_w );
DECLARE_WRITE_LINE_MEMBER( comdata_w );
DECLARE_WRITE_LINE_MEMBER( extint_w );
protected:
// device-level overrides
virtual void device_start();
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
virtual void device_config_complete();
inline void trigger_interrupt(UINT8 line);
inline void transmit_ipc_data();
inline void transmit_bit(int state);
inline void transmit_serial_data();
private:
static const device_timer_id TIMER_TXD = 0;
static const device_timer_id TIMER_BAUDX4 = 1;
static const device_timer_id TIMER_RTC = 2;
static const device_timer_id TIMER_GAP = 3;
static const device_timer_id TIMER_IPC = 4;
devcb_resolved_write_line m_out_ipl1l_func;
devcb_resolved_write_line m_out_baudx4_func;
devcb_resolved_write_line m_out_comdata_func;
devcb_resolved_write_line m_out_txd1_func;
devcb_resolved_write_line m_out_txd2_func;
devcb_resolved_read_line m_in_dtr1_func;
devcb_resolved_read_line m_in_cts2_func;
devcb_resolved_write_line m_out_netout_func;
devcb_resolved_read_line m_in_netin_func;
devcb_resolved_write_line m_out_mdselck_func;
devcb_resolved_write_line m_out_mdseld_func;
devcb_resolved_write_line m_out_mdrdw_func;
devcb_resolved_write_line m_out_erase_func;
devcb_resolved_write_line m_out_raw1_func;
devcb_resolved_read_line m_in_raw1_func;
devcb_resolved_write_line m_out_raw2_func;
devcb_resolved_read_line m_in_raw2_func;
// registers
UINT8 m_idr; // IPC data register
UINT8 m_tcr; // transfer control register
UINT8 m_tdr; // transfer data register
UINT8 m_irq; // interrupt register
UINT32 m_ctr; // counter register
UINT8 m_status; // status register
// IPC communication state
int m_comdata; // communication data
int m_comctl; // communication control
int m_ipc_state; // communication state
int m_ipc_rx; // receiving data from IPC
int m_ipc_busy; // IPC busy
int m_baudx4; // IPC baud x4
// serial transmit state
int m_tx_bits; // bits transmitted
// microdrive state
UINT8 m_mdv_data[2]; // track data register
int m_track; // current track
// timers
emu_timer *m_txd_timer; // transmit timer
emu_timer *m_baudx4_timer; // baud x4 timer
emu_timer *m_rtc_timer; // real time clock timer
emu_timer *m_gap_timer; // microdrive gap timer
emu_timer *m_ipc_timer; // delayed IPC command timer
};
// device type definition
extern const device_type ZX8302;
#endif
|