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-rw-r--r--trunk/src/emu/machine/6532riot.h136
1 files changed, 136 insertions, 0 deletions
diff --git a/trunk/src/emu/machine/6532riot.h b/trunk/src/emu/machine/6532riot.h
new file mode 100644
index 00000000000..88ee8482e93
--- /dev/null
+++ b/trunk/src/emu/machine/6532riot.h
@@ -0,0 +1,136 @@
+/***************************************************************************
+
+ RIOT 6532 emulation
+
+***************************************************************************/
+
+#pragma once
+
+#ifndef __RIOT6532_H__
+#define __RIOT6532_H__
+
+#include "emu.h"
+
+
+
+//**************************************************************************
+// INTERFACE CONFIGURATION MACROS
+//**************************************************************************
+
+#define MCFG_RIOT6532_ADD(_tag, _clock, _intrf) \
+ MCFG_DEVICE_ADD(_tag, RIOT6532, _clock) \
+ MCFG_DEVICE_CONFIG(_intrf)
+
+
+
+/***************************************************************************
+ TYPE DEFINITIONS
+***************************************************************************/
+
+
+// ======================> riot6532_interface
+
+struct riot6532_interface
+{
+ devcb_read8 m_in_a_cb;
+ devcb_read8 m_in_b_cb;
+ devcb_write8 m_out_a_cb;
+ devcb_write8 m_out_b_cb;
+ devcb_write_line m_irq_cb;
+};
+
+
+
+// ======================> riot6532_device
+
+class riot6532_device : public device_t,
+ public riot6532_interface
+{
+public:
+ // construction/destruction
+ riot6532_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ DECLARE_READ8_MEMBER( read );
+ DECLARE_WRITE8_MEMBER( write );
+
+ UINT8 reg_r(UINT8 offset);
+ void reg_w(UINT8 offset, UINT8 data);
+
+ void porta_in_set(UINT8 data, UINT8 mask);
+ void portb_in_set(UINT8 data, UINT8 mask);
+
+ UINT8 porta_in_get();
+ UINT8 portb_in_get();
+
+ UINT8 porta_out_get();
+ UINT8 portb_out_get();
+
+ void timer_end();
+
+protected:
+ class riot6532_port
+ {
+ public:
+ UINT8 m_in;
+ UINT8 m_out;
+ UINT8 m_ddr;
+ devcb_resolved_read8 m_in_func;
+ devcb_resolved_write8 m_out_func;
+ };
+
+ // device-level overrides
+ virtual void device_config_complete();
+ virtual void device_start();
+ virtual void device_reset();
+ virtual void device_post_load() { }
+ virtual void device_clock_changed() { }
+
+ static TIMER_CALLBACK( timer_end_callback );
+
+private:
+ void update_irqstate();
+ UINT8 apply_ddr(const riot6532_port *port);
+ void update_pa7_state();
+ UINT8 get_timer();
+
+ int m_index;
+
+ riot6532_port m_port[2];
+
+ devcb_resolved_write_line m_irq_func;
+
+ UINT8 m_irqstate;
+ UINT8 m_irqenable;
+ int m_irq;
+
+ UINT8 m_pa7dir; /* 0x80 = high-to-low, 0x00 = low-to-high */
+ UINT8 m_pa7prev;
+
+ UINT8 m_timershift;
+ UINT8 m_timerstate;
+ emu_timer * m_timer;
+};
+
+
+// device type definition
+extern const device_type RIOT6532;
+
+
+
+/***************************************************************************
+ PROTOTYPES
+***************************************************************************/
+
+READ8_DEVICE_HANDLER( riot6532_r );
+WRITE8_DEVICE_HANDLER( riot6532_w );
+
+void riot6532_porta_in_set(device_t *device, UINT8 data, UINT8 mask);
+void riot6532_portb_in_set(device_t *device, UINT8 data, UINT8 mask);
+
+UINT8 riot6532_porta_in_get(device_t *device);
+UINT8 riot6532_portb_in_get(device_t *device);
+
+UINT8 riot6532_porta_out_get(device_t *device);
+UINT8 riot6532_portb_out_get(device_t *device);
+
+#endif