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/* $XConsortium$ */
/*
* Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Thomas Roell not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Thomas Roell makes no representations
* about the suitability of this software for any purpose. It is provided
* "as is" without express or implied warranty.
*
* THOMAS ROELL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THOMAS ROELL BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*
* Author: Thomas Roell, roell@informatik.tu-muenchen.de
*
*/
#ifndef VGA_BANK_H
#define VGA_BANK_H
extern void *vgaReadBottom;
extern void *vgaReadTop;
extern void *vgaWriteBottom;
extern void *vgaWriteTop;
extern Bool vgaReadFlag, vgaWriteFlag;
extern void *writeseg;
extern void * vgaSetReadWrite();
extern void * vgaReadWriteNext();
extern void * vgaReadWritePrev();
extern void * vgaSetRead();
extern void * vgaReadNext();
extern void * vgaReadPrev();
extern void * vgaSetWrite();
extern void * vgaWriteNext();
extern void * vgaWritePrev();
extern void vgaSaveBank();
extern void vgaRestoreBank();
extern void vgaPushRead();
extern void vgaPopRead();
extern int vgaSegmentMask;
extern void SpeedUpComputeNext(
#if NeedFunctionPrototypes
unsigned,
unsigned
#endif
);
extern void SpeedUpComputePrev(
#if NeedFunctionPrototypes
unsigned,
unsigned
#endif
);
extern unsigned SpeedUpRowsNext[];
extern unsigned SpeedUpRowsPrev[];
#if defined(__386BSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__bsdi__)
#define VGABASE 0xFF000000
#else
#define VGABASE 0xF0000000
#endif
/* Clear these first -- since they are defined in mfbcustom.h */
#undef CHECKSCREEN
#undef SETRWF
#undef CHECKRWOF
#undef CHECKRWUF
#undef BANK_FLAG
#undef BANK_FLAG_BOTH
#undef SETR
#undef SETW
#undef SETRW
#undef CHECKRO
#undef CHECKWO
#undef CHECKRWO
#undef CHECKRU
#undef CHECKWU
#undef CHECKRWU
#undef NEXTR
#undef NEXTW
#undef PREVR
#undef PREVW
#undef SAVE_BANK
#undef RESTORE_BANK
#undef PUSHR
#undef POPR
#define CHECKSCREEN(x) (((unsigned long)x >= VGABASE) ? TRUE : FALSE)
#define SETRWF(f,x) { if(f) x = vgaSetReadWrite(x); }
#define CHECKRWOF(f,x) { if(f && ((void *)x >= vgaWriteTop)) \
x = vgaReadWriteNext(x); }
#define CHECKRWUF(f,x) { if(f && ((void *)x < vgaWriteBottom)) \
x = vgaReadWritePrev(x); }
#define BANK_FLAG(a) \
vgaWriteFlag = (((unsigned long)a >= VGABASE) ? TRUE : FALSE); \
vgaReadFlag = FALSE;
#define BANK_FLAG_BOTH(a,b) \
vgaReadFlag = (((unsigned long)a >= VGABASE) ? TRUE : FALSE); \
vgaWriteFlag = (((unsigned long)b >= VGABASE) ? TRUE : FALSE);
#define SETR(x) { if(vgaReadFlag) x = vgaSetRead(x); }
#define SETW(x) { if(vgaWriteFlag) x = vgaSetWrite(x); }
#define SETRW(x) { if(vgaWriteFlag) x = vgaSetReadWrite(x); }
#define CHECKRO(x) { if(vgaReadFlag && ((void *)x >= vgaReadTop)) \
x = vgaReadNext(x); }
#define CHECKRU(x) { if(vgaReadFlag && ((void *)x < vgaReadBottom)) \
x = vgaReadPrev(x); }
#define CHECKWO(x) { if(vgaWriteFlag && ((void *)x >= vgaWriteTop)) \
x = vgaWriteNext(x); }
#define CHECKWU(x) { if(vgaWriteFlag && ((void *)x < vgaWriteBottom)) \
x = vgaWritePrev(x); }
#define CHECKRWO(x) { if(vgaWriteFlag && ((void *)x >= vgaWriteTop)) \
x = vgaReadWriteNext(x); }
#define CHECKRWU(x) { if(vgaWriteFlag && ((void *)x < vgaWriteBottom)) \
x = vgaReadWritePrev(x); }
#define NEXTR(x) { x = vgaReadNext(x);}
#define NEXTW(x) { x = vgaWriteNext(x); }
#define PREVR(x) { x = vgaReadPrev(x); }
#define PREVW(x) { x = vgaWritePrev(x); }
#define SAVE_BANK() { if (vgaWriteFlag) vgaSaveBank(); }
#define RESTORE_BANK() { if (vgaWriteFlag) vgaRestoreBank(); }
#define PUSHR() { if(vgaWriteFlag) vgaPushRead(); }
#define POPR() { if(vgaWriteFlag) vgaPopRead(); }
#endif /* VGA_BANK_H */
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