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				|  |  | +/*
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				|  |  | +** linux/atarihw.h -- This header defines some macros and pointers for
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				|  |  | +**                    the various Atari custom hardware registers.
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				|  |  | +**
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				|  |  | +** Copyright 1994 by Björn Brauel
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				|  |  | +**
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				|  |  | +** 5/1/94 Roman Hodek:
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				|  |  | +**   Added definitions for TT specific chips.
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				|  |  | +**
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				|  |  | +** 1996-09-13 lars brinkhoff <f93labr@dd.chalmers.se>:
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				|  |  | +**   Finally added definitions for the matrix/codec and the DSP56001 host
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				|  |  | +**   interface.
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				|  |  | +**
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				|  |  | +** This file is subject to the terms and conditions of the GNU General Public
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				|  |  | +** License.  See the file COPYING in the main directory of this archive
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				|  |  | +** for more details.
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				|  |  | +**
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				|  |  | +*/
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				|  |  | +
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				|  |  | +#ifndef _LINUX_ATARIHW_H_
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				|  |  | +#define _LINUX_ATARIHW_H_
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				|  |  | +
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				|  |  | +#include <linux/types.h>
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				|  |  | +#include <asm/bootinfo.h>
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				|  |  | +#include <asm/raw_io.h>
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				|  |  | +
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				|  |  | +extern u_long atari_mch_cookie;
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				|  |  | +extern u_long atari_mch_type;
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				|  |  | +extern u_long atari_switches;
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				|  |  | +extern int atari_rtc_year_offset;
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				|  |  | +extern int atari_dont_touch_floppy_select;
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				|  |  | +
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				|  |  | +extern int atari_SCC_reset_done;
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				|  |  | +
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				|  |  | +/* convenience macros for testing machine type */
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				|  |  | +#define MACH_IS_ST	((atari_mch_cookie >> 16) == ATARI_MCH_ST)
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				|  |  | +#define MACH_IS_STE	((atari_mch_cookie >> 16) == ATARI_MCH_STE && \
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				|  |  | +			 (atari_mch_cookie & 0xffff) == 0)
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				|  |  | +#define MACH_IS_MSTE	((atari_mch_cookie >> 16) == ATARI_MCH_STE && \
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				|  |  | +			 (atari_mch_cookie & 0xffff) == 0x10)
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				|  |  | +#define MACH_IS_TT	((atari_mch_cookie >> 16) == ATARI_MCH_TT)
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				|  |  | +#define MACH_IS_FALCON	((atari_mch_cookie >> 16) == ATARI_MCH_FALCON)
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				|  |  | +#define MACH_IS_MEDUSA	(atari_mch_type == ATARI_MACH_MEDUSA)
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				|  |  | +#define MACH_IS_AB40	(atari_mch_type == ATARI_MACH_AB40)
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				|  |  | +
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				|  |  | +/* values for atari_switches */
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				|  |  | +#define ATARI_SWITCH_IKBD	0x01
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				|  |  | +#define ATARI_SWITCH_MIDI	0x02
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				|  |  | +#define ATARI_SWITCH_SND6	0x04
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				|  |  | +#define ATARI_SWITCH_SND7	0x08
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				|  |  | +#define ATARI_SWITCH_OVSC_SHIFT	16
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				|  |  | +#define ATARI_SWITCH_OVSC_IKBD	(ATARI_SWITCH_IKBD << ATARI_SWITCH_OVSC_SHIFT)
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				|  |  | +#define ATARI_SWITCH_OVSC_MIDI	(ATARI_SWITCH_MIDI << ATARI_SWITCH_OVSC_SHIFT)
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				|  |  | +#define ATARI_SWITCH_OVSC_SND6	(ATARI_SWITCH_SND6 << ATARI_SWITCH_OVSC_SHIFT)
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				|  |  | +#define ATARI_SWITCH_OVSC_SND7	(ATARI_SWITCH_SND7 << ATARI_SWITCH_OVSC_SHIFT)
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				|  |  | +#define ATARI_SWITCH_OVSC_MASK	0xffff0000
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				|  |  | +
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				|  |  | +/*
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				|  |  | + * Define several Hardware-Chips for indication so that for the ATARI we do
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				|  |  | + * no longer decide whether it is a Falcon or other machine . It's just
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				|  |  | + * important what hardware the machine uses
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				|  |  | + */
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				|  |  | +
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				|  |  | +/* ++roman 08/08/95: rewritten from ORing constants to a C bitfield */
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				|  |  | +
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				|  |  | +#define ATARIHW_DECLARE(name)	unsigned name : 1
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				|  |  | +#define ATARIHW_SET(name)	(atari_hw_present.name = 1)
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				|  |  | +#define ATARIHW_PRESENT(name)	(atari_hw_present.name)
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				|  |  | +
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				|  |  | +struct atari_hw_present {
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				|  |  | +    /* video hardware */
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				|  |  | +    ATARIHW_DECLARE(STND_SHIFTER);	/* ST-Shifter - no base low ! */
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				|  |  | +    ATARIHW_DECLARE(EXTD_SHIFTER);	/* STe-Shifter - 24 bit address */
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				|  |  | +    ATARIHW_DECLARE(TT_SHIFTER);	/* TT-Shifter */
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				|  |  | +    ATARIHW_DECLARE(VIDEL_SHIFTER);	/* Falcon-Shifter */
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				|  |  | +    /* sound hardware */
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				|  |  | +    ATARIHW_DECLARE(YM_2149);		/* Yamaha YM 2149 */
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				|  |  | +    ATARIHW_DECLARE(PCM_8BIT);		/* PCM-Sound in STe-ATARI */
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				|  |  | +    ATARIHW_DECLARE(CODEC);		/* CODEC Sound (Falcon) */
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				|  |  | +    /* disk storage interfaces */
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				|  |  | +    ATARIHW_DECLARE(TT_SCSI);		/* Directly mapped NCR5380 */
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				|  |  | +    ATARIHW_DECLARE(ST_SCSI);		/* NCR5380 via ST-DMA (Falcon) */
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				|  |  | +    ATARIHW_DECLARE(ACSI);		/* Standard ACSI like in STs */
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				|  |  | +    ATARIHW_DECLARE(IDE);		/* IDE Interface */
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				|  |  | +    ATARIHW_DECLARE(FDCSPEED);		/* 8/16 MHz switch for FDC */
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				|  |  | +    /* other I/O hardware */
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				|  |  | +    ATARIHW_DECLARE(ST_MFP);		/* The ST-MFP (there should be no Atari
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				|  |  | +					   without it... but who knows?) */
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				|  |  | +    ATARIHW_DECLARE(TT_MFP);		/* 2nd MFP */
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				|  |  | +    ATARIHW_DECLARE(SCC);		/* Serial Communications Contr. */
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				|  |  | +    ATARIHW_DECLARE(ST_ESCC);		/* SCC Z83230 in an ST */
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				|  |  | +    ATARIHW_DECLARE(ANALOG_JOY);	/* Paddle Interface for STe
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				|  |  | +					   and Falcon */
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				|  |  | +    ATARIHW_DECLARE(MICROWIRE);		/* Microwire Interface */
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				|  |  | +    /* DMA */
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				|  |  | +    ATARIHW_DECLARE(STND_DMA);		/* 24 Bit limited ST-DMA */
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				|  |  | +    ATARIHW_DECLARE(EXTD_DMA);		/* 32 Bit ST-DMA */
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				|  |  | +    ATARIHW_DECLARE(SCSI_DMA);		/* DMA for the NCR5380 */
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				|  |  | +    ATARIHW_DECLARE(SCC_DMA);		/* DMA for the SCC */
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				|  |  | +    /* real time clocks */
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				|  |  | +    ATARIHW_DECLARE(TT_CLK);		/* TT compatible clock chip */
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				|  |  | +    ATARIHW_DECLARE(MSTE_CLK);		/* Mega ST(E) clock chip */
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				|  |  | +    /* supporting hardware */
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				|  |  | +    ATARIHW_DECLARE(SCU);		/* System Control Unit */
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				|  |  | +    ATARIHW_DECLARE(BLITTER);		/* Blitter */
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				|  |  | +    ATARIHW_DECLARE(VME);		/* VME Bus */
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				|  |  | +    ATARIHW_DECLARE(DSP56K);		/* DSP56k processor in Falcon */
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				|  |  | +};
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				|  |  | +
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				|  |  | +extern struct atari_hw_present atari_hw_present;
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				|  |  | +
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				|  |  | +
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				|  |  | +/* Reading the MFP port register gives a machine independent delay, since the
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				|  |  | + * MFP always has a 8 MHz clock. This avoids problems with the varying length
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				|  |  | + * of nops on various machines. Somebody claimed that the tstb takes 600 ns.
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				|  |  | + */
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				|  |  | +#define	MFPDELAY() \
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				|  |  | +	__asm__ __volatile__ ( "tstb %0" : : "m" (st_mfp.par_dt_reg) : "cc" );
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				|  |  | +
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				|  |  | +/* Do cache push/invalidate for DMA read/write. This function obeys the
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				|  |  | + * snooping on some machines (Medusa) and processors: The Medusa itself can
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				|  |  | + * snoop, but only the '040 can source data from its cache to DMA writes i.e.,
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				|  |  | + * reads from memory). Both '040 and '060 invalidate cache entries on snooped
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				|  |  | + * DMA reads (i.e., writes to memory).
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				|  |  | + */
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				|  |  | +
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				|  |  | +
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				|  |  | +#define atari_readb   raw_inb
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				|  |  | +#define atari_writeb  raw_outb
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				|  |  | +
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				|  |  | +#define atari_inb_p   raw_inb
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				|  |  | +#define atari_outb_p  raw_outb
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				|  |  | +
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				|  |  | +
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				|  |  | +
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				|  |  | +#include <linux/mm.h>
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				|  |  | +#include <asm/cacheflush.h>
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				|  |  | +
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				|  |  | +static inline void dma_cache_maintenance( unsigned long paddr,
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				|  |  | +					  unsigned long len,
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				|  |  | +					  int writeflag )
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				|  |  | +
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				|  |  | +{
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				|  |  | +	if (writeflag) {
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				|  |  | +		if (!MACH_IS_MEDUSA || CPU_IS_060)
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				|  |  | +			cache_push( paddr, len );
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				|  |  | +	}
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				|  |  | +	else {
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				|  |  | +		if (!MACH_IS_MEDUSA)
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				|  |  | +			cache_clear( paddr, len );
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				|  |  | +	}
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				|  |  | +}
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				|  |  | +
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				|  |  | +
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				|  |  | +/*
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				|  |  | +** Shifter
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				|  |  | + */
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