diff options
Diffstat (limited to 'src/devices/bus/plus4/std.c')
-rw-r--r-- | src/devices/bus/plus4/std.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/devices/bus/plus4/std.c b/src/devices/bus/plus4/std.c new file mode 100644 index 00000000000..8627f99cc30 --- /dev/null +++ b/src/devices/bus/plus4/std.c @@ -0,0 +1,69 @@ +// license:BSD-3-Clause +// copyright-holders:Curt Coder +/********************************************************************** + + Commodore Plus/4 standard cartridge emulation + +**********************************************************************/ + +#include "std.h" + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type PLUS4_STD = &device_creator<plus4_standard_cartridge_device>; + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// plus4_standard_cartridge_device - constructor +//------------------------------------------------- + +plus4_standard_cartridge_device::plus4_standard_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : + device_t(mconfig, PLUS4_STD, "Plus/4 standard cartridge", tag, owner, clock, "plus4_standard", __FILE__), + device_plus4_expansion_card_interface(mconfig, *this) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void plus4_standard_cartridge_device::device_start() +{ +} + + +//------------------------------------------------- +// plus4_cd_r - cartridge data read +//------------------------------------------------- + +UINT8 plus4_standard_cartridge_device::plus4_cd_r(address_space &space, offs_t offset, UINT8 data, int ba, int cs0, int c1l, int c2l, int cs1, int c1h, int c2h) +{ + if (!c1l && m_c1l.bytes()) + { + data = m_c1l[offset & m_c1l.mask()]; + } + else if (!c1h && m_c1h.bytes()) + { + data = m_c1h[offset & m_c1h.mask()]; + } + else if (!c2l && m_c2l.bytes()) + { + data = m_c2l[offset & m_c2l.mask()]; + } + else if (!c2h && m_c2h.bytes()) + { + data = m_c2h[offset & m_c2h.mask()]; + } + + return data; +} |