mirror of
https://git.code.sf.net/p/fuse-emulator/fuse
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ba77c2ab67
To avoid clashes with any similarly named system files (thanks, BogDan Vatra and Sergio Baldoví).
146 lines
4.8 KiB
C
146 lines
4.8 KiB
C
/* scld.h: Routines for handling the Timex SCLD
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Copyright (c) 2002-2004 Fredrick Meunier, Witold Filipczyk
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Copyright (c) 2015 Fredrick Meunier
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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Author contact information:
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E-mail: fredm@spamcop.net
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*/
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#ifndef FUSE_SCLD_H
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#define FUSE_SCLD_H
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#ifndef FUSE_MEMORY_H
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#include "memory_pages.h"
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#endif /* #ifndef FUSE_MEMORY_H */
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#define STANDARD 0x00 /* standard Spectrum */
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#define ALTDFILE 0x01 /* the same in nature as above, but using second
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display file */
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#define EXTCOLOUR 0x02 /* extended colours (data taken from first screen,
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attributes 1x8 taken from second display. */
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#define EXTCOLALTD 0x03 /* similar to above, but data is taken from second
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screen */
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#define HIRESATTR 0x04 /* hires mode, data in odd columns is taken from
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first screen in standard way, data in even
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columns is made from attributes data (8x8) */
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#define HIRESATTRALTD 0x05 /* similar to above, but data taken from second
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display */
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#define HIRES 0x06 /* true hires mode, odd columns from first screen,
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even columns from second screen. columns
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numbered from 1. */
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#define HIRESDOUBLECOL 0x07 /* data taken only from second screen, columns are
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doubled */
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#define HIRESCOLMASK 0x38
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#define WHITEBLACK 0x00
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#define YELLOWBLUE 0x01
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#define CYANRED 0x02
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#define GREENMAGENTA 0x03
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#define MAGENTAGREEN 0x04
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#define REDCYAN 0x05
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#define BLUEYELLOW 0x06
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#define BLACKWHITE 0x07
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#define ALTDFILE_OFFSET 0x2000
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#ifdef WORDS_BIGENDIAN
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typedef struct
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{
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unsigned altmembank : 1; /* ALTMEMBANK : 0 = cartridge, 1 = exrom */
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unsigned intdisable : 1; /* INTDISABLE */
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unsigned b5 : 1; /* */
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unsigned b4 : 1; /* */
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unsigned b3 : 1; /* */
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unsigned hires : 1; /* SCLD HIRES mode */
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unsigned b1 : 1; /* */
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unsigned altdfile : 1; /* SCLD use ALTDFILE */
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} scld_names;
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typedef struct
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{
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unsigned b7 : 1; /* */
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unsigned b6 : 1; /* */
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unsigned hirescol : 3; /* HIRESCOLMASK */
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unsigned scrnmode : 3; /* SCRNMODEMASK */
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} scld_masks;
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#else /* #ifdef WORDS_BIGENDIAN */
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typedef struct
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{
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unsigned altdfile : 1; /* SCLD use ALTDFILE */
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unsigned b1 : 1; /* */
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unsigned hires : 1; /* SCLD HIRES mode */
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unsigned b3 : 1; /* */
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unsigned b4 : 1; /* */
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unsigned b5 : 1; /* */
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unsigned intdisable : 1; /* INTDISABLE */
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unsigned altmembank : 1; /* ALTMEMBANK : 0 = cartridge, 1 = exrom */
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} scld_names;
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typedef struct
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{
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unsigned scrnmode : 3; /* SCRNMODEMASK */
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unsigned hirescol : 3; /* HIRESCOLMASK */
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unsigned b6 : 1; /* */
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unsigned b7 : 1; /* */
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} scld_masks;
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#endif /* #ifdef WORDS_BIGENDIAN */
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typedef union
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{
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libspectrum_byte byte;
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scld_masks mask;
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scld_names name;
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} scld;
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extern scld scld_last_dec; /* The last byte sent to Timex DEC port */
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extern libspectrum_byte scld_last_hsr; /* Last byte sent to Timex HSR port */
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/* Home map has pointers to the related entries in the RAM array so that the
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dck loading code can locate the associated pages when extracting data from
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its files */
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extern memory_page * timex_home[MEMORY_PAGES_IN_64K];
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extern memory_page timex_exrom[MEMORY_PAGES_IN_64K];
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extern memory_page timex_dock[MEMORY_PAGES_IN_64K];
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void scld_register_startup( void );
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void scld_dec_write( libspectrum_word port, libspectrum_byte b );
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void scld_hsr_write( libspectrum_word port, libspectrum_byte b );
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void scld_memory_map( void );
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/* Initialise the memory map to point to the home bank */
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void scld_memory_map_home( void );
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libspectrum_byte hires_get_attr( void );
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libspectrum_byte hires_convert_dec( libspectrum_byte attr );
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void scld_home_map_16k( libspectrum_word address, memory_page source[],
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int page_num );
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/* Set contention for SCLD, contended in home, Dock and Exrom in the 0x4000 -
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0x7FFF range */
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void scld_set_exrom_dock_contention( void );
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#endif /* #ifndef FUSE_SCLD_H */
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