1 // license:BSD-3-Clause
2 // copyright-holders:Curt Coder
3 /**********************************************************************
4
5 VizaWrite 64 cartridge emulation
6
7 **********************************************************************/
8
9 #include "emu.h"
10 #include "simons_basic.h"
11
12
13
14 //**************************************************************************
15 // DEVICE DEFINITIONS
16 //**************************************************************************
17
18 DEFINE_DEVICE_TYPE(C64_SIMONS_BASIC, c64_simons_basic_cartridge_device, "c64_simons_basic", "C64 Simons' BASIC")
19
20
21
22 //**************************************************************************
23 // LIVE DEVICE
24 //**************************************************************************
25
26 //-------------------------------------------------
27 // c64_simons_basic_cartridge_device - constructor
28 //-------------------------------------------------
29
c64_simons_basic_cartridge_device(const machine_config & mconfig,const char * tag,device_t * owner,uint32_t clock)30 c64_simons_basic_cartridge_device::c64_simons_basic_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
31 device_t(mconfig, C64_SIMONS_BASIC, tag, owner, clock),
32 device_c64_expansion_card_interface(mconfig, *this)
33 {
34 }
35
36
37 //-------------------------------------------------
38 // device_start - device-specific startup
39 //-------------------------------------------------
40
device_start()41 void c64_simons_basic_cartridge_device::device_start()
42 {
43 }
44
45
46 //-------------------------------------------------
47 // device_reset - device-specific reset
48 //-------------------------------------------------
49
device_reset()50 void c64_simons_basic_cartridge_device::device_reset()
51 {
52 m_game = 1;
53 }
54
55
56 //-------------------------------------------------
57 // c64_cd_r - cartridge data read
58 //-------------------------------------------------
59
c64_cd_r(offs_t offset,uint8_t data,int sphi2,int ba,int roml,int romh,int io1,int io2)60 uint8_t c64_simons_basic_cartridge_device::c64_cd_r(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2)
61 {
62 if (!roml)
63 {
64 data = m_roml[offset & 0x1fff];
65 }
66 else if (!romh)
67 {
68 data = m_romh[offset & 0x1fff];
69 }
70
71 return data;
72 }
73
74
75 //-------------------------------------------------
76 // c64_cd_w - cartridge data write
77 //-------------------------------------------------
78
c64_cd_w(offs_t offset,uint8_t data,int sphi2,int ba,int roml,int romh,int io1,int io2)79 void c64_simons_basic_cartridge_device::c64_cd_w(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2)
80 {
81 if (!io1)
82 {
83 m_game = !BIT(data, 0);
84 }
85 }
86