summaryrefslogtreecommitdiffstatshomepage
path: root/src/devices/machine/com8116.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/devices/machine/com8116.h')
-rw-r--r--src/devices/machine/com8116.h104
1 files changed, 104 insertions, 0 deletions
diff --git a/src/devices/machine/com8116.h b/src/devices/machine/com8116.h
new file mode 100644
index 00000000000..a423f3782d7
--- /dev/null
+++ b/src/devices/machine/com8116.h
@@ -0,0 +1,104 @@
+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ COM8116 Dual Baud Rate Generator (Programmable Divider) emulation
+
+**********************************************************************
+ _____ _____
+ XTAL/EXT1 1 |* \_/ | 18 XTAL/EXT2
+ +5V 2 | | 17 fT
+ fR 3 | | 16 Ta
+ Ra 4 | COM8116 | 15 Tb
+ Rb 5 | COM8116T | 14 Tc
+ Rc 6 | COM8136 | 13 Td
+ Rd 7 | COM8136T | 12 STT
+ STR 8 | | 11 GND
+ NC 9 |_____________| 10 fX/4
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __COM8116__
+#define __COM8116__
+
+#include "emu.h"
+
+
+
+///*************************************************************************
+// INTERFACE CONFIGURATION MACROS
+///*************************************************************************
+
+#define MCFG_COM8116_FX4_HANDLER(_devcb) \
+ devcb = &com8116_device::set_fx4_handler(*device, DEVCB_##_devcb);
+
+#define MCFG_COM8116_FR_HANDLER(_devcb) \
+ devcb = &com8116_device::set_fr_handler(*device, DEVCB_##_devcb);
+
+#define MCFG_COM8116_FT_HANDLER(_devcb) \
+ devcb = &com8116_device::set_ft_handler(*device, DEVCB_##_devcb);
+
+
+///*************************************************************************
+// TYPE DEFINITIONS
+///*************************************************************************
+
+// ======================> com8116_device
+
+class com8116_device : public device_t
+{
+public:
+ // construction/destruction
+ com8116_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ template<class _Object> static devcb_base &set_fx4_handler(device_t &device, _Object object) { return downcast<com8116_device &>(device).m_fx4_handler.set_callback(object); }
+ template<class _Object> static devcb_base &set_fr_handler(device_t &device, _Object object) { return downcast<com8116_device &>(device).m_fr_handler.set_callback(object); }
+ template<class _Object> static devcb_base &set_ft_handler(device_t &device, _Object object) { return downcast<com8116_device &>(device).m_ft_handler.set_callback(object); }
+
+ void str_w(UINT8 data);
+ DECLARE_WRITE8_MEMBER( str_w );
+ void stt_w(UINT8 data);
+ DECLARE_WRITE8_MEMBER( stt_w );
+
+ static const int divisors_16X_5_0688MHz[];
+ static const int divisors_16X_4_9152MHz[];
+ static const int divisors_32X_5_0688MHz[];
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int m_param, void *ptr);
+
+private:
+ enum
+ {
+ TIMER_FX4,
+ TIMER_FR,
+ TIMER_FT
+ };
+
+ devcb_write_line m_fx4_handler;
+ devcb_write_line m_fr_handler;
+ devcb_write_line m_ft_handler;
+
+ int m_fx4;
+ int m_fr;
+ int m_ft;
+
+ const int *m_fr_divisors;
+ const int *m_ft_divisors;
+
+ // timers
+ emu_timer *m_fx4_timer;
+ emu_timer *m_fr_timer;
+ emu_timer *m_ft_timer;
+};
+
+
+// device type definition
+extern const device_type COM8116;
+
+#endif