blob: 768a29fde7a935b4b689c9d20c03b15f68b495f4 (
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
|
// license:BSD-3-Clause
// copyright-holders:F. Ulivi
/*********************************************************************
hp9825_tape.h
HP9825 tape sub-system
*********************************************************************/
#ifndef MAME_MACHINE_HP9825_TAPE_H
#define MAME_MACHINE_HP9825_TAPE_H
#pragma once
#include "formats/hti_tape.h"
#include "machine/hp_dc100_tape.h"
#include "machine/74123.h"
class hp9825_tape_device : public device_t
{
public:
// construction/destruction
hp9825_tape_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
uint16_t tape_r(offs_t offset);
void tape_w(offs_t offset, uint16_t data);
auto flg() { return m_flg_handler.bind(); }
auto sts() { return m_sts_handler.bind(); }
auto dmar() { return m_dmar_handler.bind(); }
auto led() { return m_led_handler.bind(); }
auto cart_in() { return m_cart_in_handler.bind(); }
DECLARE_WRITE_LINE_MEMBER(short_gap_w);
DECLARE_WRITE_LINE_MEMBER(long_gap_w);
DECLARE_WRITE_LINE_MEMBER(cart_out_w);
DECLARE_WRITE_LINE_MEMBER(hole_w);
DECLARE_WRITE_LINE_MEMBER(tacho_tick_w);
DECLARE_WRITE_LINE_MEMBER(motion_w);
DECLARE_WRITE_LINE_MEMBER(rd_bit_w);
DECLARE_READ_LINE_MEMBER(wr_bit_r);
protected:
// device-level overrides
virtual void device_add_mconfig(machine_config &config) override;
virtual void device_start() override;
virtual void device_reset() override;
private:
devcb_write_line m_flg_handler;
devcb_write_line m_sts_handler;
devcb_write_line m_dmar_handler;
devcb_write_line m_led_handler;
devcb_write_line m_cart_in_handler;
required_device<hp_dc100_tape_device> m_tape;
required_device<ttl74123_device> m_short_gap_timer; // U43a
required_device<ttl74123_device> m_long_gap_timer; // U43b
// Registers
uint8_t m_cmd_reg;
uint8_t m_stat_reg;
// State
bool m_flg;
bool m_sts;
bool m_data_out; // U38-9
bool m_data_in; // U13-6
bool m_exception; // U4-6
bool m_search_complete; // U9-6
bool m_dma_req; // U9-9
bool m_in_gap; // U39-4
bool m_no_go; // U6-3
bool m_valid_bits; // U39-5
uint8_t m_trans_cnt; // U42
bool m_short_gap_out; // U43-13
bool m_long_gap_out; // U43-5
void clear_state();
void set_flg(bool state);
void update_sts();
void update_dmar();
bool is_moving_fwd() const;
bool is_speed_fast() const;
void check_for_speed_change();
void start_rd_wr(bool recalc = false);
};
// device type definition
DECLARE_DEVICE_TYPE(HP9825_TAPE, hp9825_tape_device)
#endif // MAME_MACHINE_HP9825_TAPE_H
|