1 // license:BSD-3-Clause
2 // copyright-holders:Nigel Barnes
3 /**********************************************************************
4
5 BBC Master Internal Modem port
6
7 **********************************************************************/
8
9 #include "emu.h"
10 #include "modem.h"
11
12
13 //**************************************************************************
14 // DEVICE DEFINITIONS
15 //**************************************************************************
16
17 DEFINE_DEVICE_TYPE(BBC_MODEM_SLOT, bbc_modem_slot_device, "bbc_modem_slot", "BBC Master Internal Modem port")
18
19
20
21 //**************************************************************************
22 // DEVICE BBC_MODEM PORT INTERFACE
23 //**************************************************************************
24
25 //-------------------------------------------------
26 // device_bbc_modem_interface - constructor
27 //-------------------------------------------------
28
device_bbc_modem_interface(const machine_config & mconfig,device_t & device)29 device_bbc_modem_interface::device_bbc_modem_interface(const machine_config &mconfig, device_t &device) :
30 device_interface(device, "bbcmodem")
31 {
32 m_slot = dynamic_cast<bbc_modem_slot_device *>(device.owner());
33 }
34
35
36 //**************************************************************************
37 // LIVE DEVICE
38 //**************************************************************************
39
40 //-------------------------------------------------
41 // bbc_modem_slot_device - constructor
42 //-------------------------------------------------
43
bbc_modem_slot_device(const machine_config & mconfig,const char * tag,device_t * owner,uint32_t clock)44 bbc_modem_slot_device::bbc_modem_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
45 : device_t(mconfig, BBC_MODEM_SLOT, tag, owner, clock)
46 , device_single_card_slot_interface<device_bbc_modem_interface>(mconfig, *this)
47 , m_card(nullptr)
48 , m_irq_handler(*this)
49 {
50 }
51
52
53 //-------------------------------------------------
54 // device_start - device-specific startup
55 //-------------------------------------------------
56
device_start()57 void bbc_modem_slot_device::device_start()
58 {
59 m_card = get_card_device();
60
61 // resolve callbacks
62 m_irq_handler.resolve_safe();
63 }
64
65
66 //-------------------------------------------------
67 // read
68 //-------------------------------------------------
69
read(offs_t offset)70 uint8_t bbc_modem_slot_device::read(offs_t offset)
71 {
72 if (m_card)
73 return m_card->read(offset & 0x0f);
74 else
75 return 0xfe;
76 }
77
78 //-------------------------------------------------
79 // write
80 //-------------------------------------------------
81
write(offs_t offset,uint8_t data)82 void bbc_modem_slot_device::write(offs_t offset, uint8_t data)
83 {
84 if (m_card)
85 m_card->write(offset & 0x0f, data);
86 }
87
88 //-------------------------------------------------
89 // SLOT_INTERFACE( bbcm_modem_devices )
90 //-------------------------------------------------
91
92
93 // slot devices
94 #include "scsiaiv.h"
95
96
bbcm_modem_devices(device_slot_interface & device)97 void bbcm_modem_devices(device_slot_interface &device)
98 {
99 //device.option_add("modem", BBC_MODEM); /* Beebug Master Modem */
100 device.option_add("scsiaiv", BBC_SCSIAIV); /* Acorn AIV SCSI Host Adaptor */
101 //device.option_add("vp415", BBC_VP415); /* Philips VP415 */
102 }
103