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-rw-r--r--trunk/src/emu/machine/com8116.c135
1 files changed, 135 insertions, 0 deletions
diff --git a/trunk/src/emu/machine/com8116.c b/trunk/src/emu/machine/com8116.c
new file mode 100644
index 00000000000..74623916653
--- /dev/null
+++ b/trunk/src/emu/machine/com8116.c
@@ -0,0 +1,135 @@
+/**********************************************************************
+
+ COM8116 Dual Baud Rate Generator (Programmable Divider) emulation
+
+ Copyright MESS Team.
+ Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#include "emu.h"
+#include "com8116.h"
+#include "machine/devhelpr.h"
+
+
+
+//**************************************************************************
+// MACROS / CONSTANTS
+//**************************************************************************
+
+#define LOG 0
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+// device type definition
+const device_type COM8116 = &device_creator<com8116_device>;
+
+//-------------------------------------------------
+// com8116_device - constructor
+//-------------------------------------------------
+
+com8116_device::com8116_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, COM8116, "COM8116", tag, owner, clock)
+{
+}
+
+
+//-------------------------------------------------
+// device_config_complete - perform any
+// operations now that the configuration is
+// complete
+//-------------------------------------------------
+
+void com8116_device::device_config_complete()
+{
+ // inherit a copy of the static data
+ const com8116_interface *intf = reinterpret_cast<const com8116_interface *>(static_config());
+ if (intf != NULL)
+ *static_cast<com8116_interface *>(this) = *intf;
+
+ // or initialize to defaults if none provided
+ else
+ {
+ memset(&m_out_fx4_cb, 0, sizeof(m_out_fx4_cb));
+ memset(&m_out_fr_cb, 0, sizeof(m_out_fr_cb));
+ memset(&m_out_ft_cb, 0, sizeof(m_out_ft_cb));
+ }
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void com8116_device::device_start()
+{
+ // resolve callbacks
+ m_out_fx4_func.resolve(m_out_fx4_cb, *this);
+ m_out_fr_func.resolve(m_out_fr_cb, *this);
+ m_out_ft_func.resolve(m_out_ft_cb, *this);
+
+ // allocate timers
+ m_fx4_timer = timer_alloc(TIMER_FX4);
+ m_fx4_timer->adjust(attotime::zero, 0, attotime::from_hz(clock() / 4));
+ m_fr_timer = timer_alloc(TIMER_FR);
+ m_ft_timer = timer_alloc(TIMER_FT);
+
+ // register for state saving
+ save_item(NAME(m_fr));
+ save_item(NAME(m_ft));
+}
+
+
+//-------------------------------------------------
+// device_timer - handler timer events
+//-------------------------------------------------
+
+void com8116_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
+{
+ switch (id)
+ {
+ case TIMER_FX4:
+ m_out_fx4_func(1);
+ break;
+
+ case TIMER_FR:
+ m_out_fr_func(1);
+ break;
+
+ case TIMER_FT:
+ m_out_ft_func(1);
+ break;
+ }
+}
+
+
+//-------------------------------------------------
+// str_w -
+//-------------------------------------------------
+
+WRITE8_MEMBER( com8116_device::str_w )
+{
+ if (LOG) logerror("COM8116 '%s' Receiver Divider %01x\n", tag(), data & 0x0f);
+
+ m_fr = data & 0x0f;
+
+ m_fr_timer->adjust(attotime::zero, 0, attotime::from_hz(clock() / m_fr_divisors[m_fr] / 2));
+}
+
+
+//-------------------------------------------------
+// stt_w -
+//-------------------------------------------------
+
+WRITE8_MEMBER( com8116_device::stt_w )
+{
+ if (LOG) logerror("COM8116 '%s' Transmitter Divider %01x\n", tag(), data & 0x0f);
+
+ m_ft = data & 0x0f;
+
+ m_ft_timer->adjust(attotime::zero, 0, attotime::from_hz(clock() / m_ft_divisors[m_ft] / 2));
+}