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author | 2013-07-09 09:46:14 +0000 | |
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committer | 2013-07-09 09:46:14 +0000 | |
commit | 2a835a4f2849ac3cf3511926a8cc332d3281381e (patch) | |
tree | 5dc5f7746899aeb4175fafbc3d050d270e2ca219 /src/mess/machine/c64/vic1011.c | |
parent | ba147b636cb1938c466d71df755b02f2897d55ea (diff) |
(MESS) c64: Moved cartridges to their own subdirectory. (nw)
Diffstat (limited to 'src/mess/machine/c64/vic1011.c')
-rw-r--r-- | src/mess/machine/c64/vic1011.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/mess/machine/c64/vic1011.c b/src/mess/machine/c64/vic1011.c new file mode 100644 index 00000000000..fa173674fb0 --- /dev/null +++ b/src/mess/machine/c64/vic1011.c @@ -0,0 +1,164 @@ +/********************************************************************** + + Commodore VIC-1011A/B RS-232C Adapter emulation + + Copyright MESS Team. + Visit http://mamedev.org for licensing and usage restrictions. + +**********************************************************************/ + +#include "vic1011.h" + + + +//************************************************************************** +// MACROS/CONSTANTS +//************************************************************************** + +#define RS232_TAG "rs232" + + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +const device_type C64_VIC1011 = &device_creator<c64_vic1011_device>; + + +//------------------------------------------------- +// rs232_port_interface rs232_intf +//------------------------------------------------- + +static const rs232_port_interface rs232_intf = +{ + DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, c64_vic1011_device, rxd_w), + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL, + DEVCB_NULL +}; + + +//------------------------------------------------- +// MACHINE_DRIVER( vic1011 ) +//------------------------------------------------- + +static MACHINE_CONFIG_FRAGMENT( vic1011 ) + MCFG_RS232_PORT_ADD(RS232_TAG, rs232_intf, default_rs232_devices, NULL) +MACHINE_CONFIG_END + + +//------------------------------------------------- +// machine_config_additions - device-specific +// machine configurations +//------------------------------------------------- + +machine_config_constructor c64_vic1011_device::device_mconfig_additions() const +{ + return MACHINE_CONFIG_NAME( vic1011 ); +} + + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// c64_vic1011_device - constructor +//------------------------------------------------- + +c64_vic1011_device::c64_vic1011_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : device_t(mconfig, C64_VIC1011, "C64 VIC1011", tag, owner, clock, "c64_vic1011", __FILE__), + device_c64_user_port_interface(mconfig, *this), + m_rs232(*this, RS232_TAG) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void c64_vic1011_device::device_start() +{ +} + + +//------------------------------------------------- +// c64_pb_r - port B read +//------------------------------------------------- + +UINT8 c64_vic1011_device::c64_pb_r(address_space &space, offs_t offset) +{ + /* + + bit description + + 0 Sin + 1 + 2 + 3 + 4 DCDin + 5 + 6 CTS + 7 DSR + + */ + + UINT8 data = 0; + + data |= !m_rs232->rx(); + data |= m_rs232->dcd_r() << 4; + data |= m_rs232->cts_r() << 6; + data |= m_rs232->dsr_r() << 7; + + return data; +} + + +//------------------------------------------------- +// c64_pb_w - port B write +//------------------------------------------------- + +void c64_vic1011_device::c64_pb_w(address_space &space, offs_t offset, UINT8 data) +{ + /* + + bit description + + 0 + 1 RTS + 2 DTR + 3 + 4 + 5 DCDout + 6 + 7 + + */ + + m_rs232->rts_w(BIT(data, 1)); + m_rs232->dtr_w(BIT(data, 2)); +} + + +//------------------------------------------------- +// c64_pa2_w - PA2 write +//------------------------------------------------- + +void c64_vic1011_device::c64_pa2_w(int state) +{ + m_rs232->tx(!state); +} + + +//------------------------------------------------- +// rxd_w - +//------------------------------------------------- + +WRITE_LINE_MEMBER( c64_vic1011_device::rxd_w ) +{ + m_slot->cia_flag2_w(!state); +} |