99 lines
2.6 KiB
C++
99 lines
2.6 KiB
C++
// Copyright (C) 2001 MandrakeSoft S.A.
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//
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// MandrakeSoft S.A.
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// 43, rue d'Aboukir
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// 75002 Paris - France
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// http://www.linux-mandrake.com/
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// http://www.mandrakesoft.com/
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#ifndef _BX_PIT_H
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#define _BX_PIT_H
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#if BX_USE_PIT_SMF
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# define BX_PIT_SMF static
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# define BX_PIT_THIS bx_pit.
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#else
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# define BX_PIT_SMF
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# define BX_PIT_THIS this->
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#endif
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#ifdef OUT
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# undef OUT
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#endif
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typedef struct {
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Bit8u mode;
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Bit8u latch_mode;
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Bit16u input_latch_value;
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Boolean input_latch_toggle;
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Bit16u output_latch_value;
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Boolean output_latch_toggle;
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Boolean output_latch_full;
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Bit16u counter_max;
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Bit16u counter;
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Boolean bcd_mode;
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Boolean active;
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Boolean GATE; // GATE input pin
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Boolean OUT; // OUT output pin
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} bx_pit_t;
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class bx_pit_c {
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public:
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bx_pit_c( void );
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~bx_pit_c( void );
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BX_PIT_SMF int init( bx_devices_c *);
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BX_PIT_SMF Boolean periodic( Bit32u usec_delta );
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BX_PIT_SMF int SaveState( class state_file *fd );
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BX_PIT_SMF int LoadState( class state_file *fd );
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private:
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static Bit32u read_handler(void *this_ptr, Bit32u address, unsigned io_len);
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static void write_handler(void *this_ptr, Bit32u address, Bit32u value, unsigned io_len);
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#if !BX_USE_PIT_SMF
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Bit32u read( Bit32u addr, unsigned int len );
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void write( Bit32u addr, Bit32u Value, unsigned int len );
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#endif
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struct {
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bx_pit_t timer[3];
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Bit8u speaker_data_on;
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Boolean refresh_clock_div2;
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int timer_handle[3];
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} s;
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bx_devices_c *devices;
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BX_PIT_SMF void write_count_reg( Bit8u value, unsigned timerid );
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BX_PIT_SMF Bit8u read_counter( unsigned timerid );
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BX_PIT_SMF void latch( unsigned timerid );
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BX_PIT_SMF void set_GATE(unsigned pit_id, unsigned value);
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BX_PIT_SMF void start(unsigned timerid);
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};
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#if BX_USE_PIT_SMF
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extern bx_pit_c bx_pit;
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#endif
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#endif // #ifndef _BX_PIT_H
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