blob: 769b87a0876427792f5cdb44c6044dce2a99ea04 (
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
|
// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
PEDL Multiform Z80 2nd processor
http://chrisacorns.computinghistory.org.uk/8bit_Upgrades/Technomatic_MultiformZ80.html
**********************************************************************/
#ifndef MAME_BUS_BBC_1MHZBUS_MULTIFORM_H
#define MAME_BUS_BBC_1MHZBUS_MULTIFORM_H
#include "1mhzbus.h"
#include "cpu/z80/z80.h"
#include "machine/gen_latch.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> bbc_multiform_device
class bbc_multiform_device :
public device_t,
public device_bbc_1mhzbus_interface
{
public:
// construction/destruction
bbc_multiform_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
uint8_t mem_r(offs_t offset);
void mem_w(offs_t offset, uint8_t data);
void rom_disable_w(uint8_t data);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// optional information overrides
virtual void device_add_mconfig(machine_config &config) override;
virtual const tiny_rom_entry *device_rom_region() const override;
virtual uint8_t fred_r(offs_t offset) override;
virtual void fred_w(offs_t offset, uint8_t data) override;
private:
IRQ_CALLBACK_MEMBER( irq_callback );
required_device<cpu_device> m_z80;
required_device_array<generic_latch_8_device, 2> m_host_latch;
required_device_array<generic_latch_8_device, 2> m_parasite_latch;
required_memory_region m_osm;
void z80_mem(address_map &map);
void z80_io(address_map &map);
std::unique_ptr<uint8_t[]> m_ram;
bool m_rom_enabled;
};
// device type definition
DECLARE_DEVICE_TYPE(BBC_MULTIFORM, bbc_multiform_device)
#endif /* MAME_BUS_BBC_1MHZBUS_MULTIFORM_H */
|