tiles.c

Go to the documentation of this file.

/*****************************************************************************
 * ugBASIC - an isomorphic BASIC language compiler for retrocomputers        *
 *****************************************************************************
 * Copyright 2021-2026 Marco Spedaletti (asimov@mclink.it)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *----------------------------------------------------------------------------
 * Concesso in licenza secondo i termini della Licenza Apache, versione 2.0
 * (la "Licenza"); è proibito usare questo file se non in conformità alla
 * Licenza. Una copia della Licenza è disponibile all'indirizzo:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Se non richiesto dalla legislazione vigente o concordato per iscritto,
 * il software distribuito nei termini della Licenza è distribuito
 * "COSÌ COM'È", SENZA GARANZIE O CONDIZIONI DI ALCUN TIPO, esplicite o
 * implicite. Consultare la Licenza per il testo specifico che regola le
 * autorizzazioni e le limitazioni previste dalla medesima.
 ****************************************************************************/
 
/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION 
 ****************************************************************************/

/* <usermanual>
@keyword TILES AT
 
@english
Set the starting address, in memory, for the tiles (for textual mode).
The input parameter is decoded and declined according to the hardware 
limits. So it is not said that exactly the given address is set.
 
@italian
Imposta l'indirizzo di partenza, in memoria, per le tile (per 
la modalità testuale). Il parametro di input viene decodificato e 
declinato in base all'hardware. Quindi non è detto che sia impostato
esattamente all'indirizzo specificato.
 
@syntax TILES AT # [integer]
 
@example TILES AT #$8400
 
@target c128
</usermanual> */
void tiles_at( Environment * _environment, int _address ) {
 
    
 
    // Let's define the special variable bitmapAddress, and update
    // it with the requested value.
    // TODO: tile_address should be retrieved via function!
    Variable * tiles_address = variable_retrieve_or_define( _environment, "tiles_address", VT_ADDRESS, _address );
    variable_store( _environment, tiles_address->name, ( ( _address >> 11 ) & 0x07 ) * 0x8400 );
 
    char addressString[MAX_TEMPORARY_STORAGE]; sprintf(addressString, "#$%2.2x", ( _address >> 8 ) & 0xff );
 
    vic2_tiles_at( _environment, addressString );
 
}

/* <usermanual>
@keyword TILES AT
 
@syntax TILES AT [expression]
 
@example TILES AT tilesAddress
 
@target c128
</usermanual> */
void tiles_at_var( Environment * _environment, char * _address ) {
 
    
 
    Variable * address = variable_retrieve( _environment, _address );
 
    Variable * temp = variable_temporary( _environment, VT_ADDRESS, "(temporary storage)" );
 
    // Let's define the special variable bitmapAddress, and update
    // it with the requested value.
    Variable * tiles_address = variable_define( _environment, "tiles_address", VT_ADDRESS, 0x0800 );
    
    char addressString[MAX_TEMPORARY_STORAGE]; sprintf(addressString, "%s", address_displacement(_environment, address->realName, "1") );
 
    vic2_tiles_at( _environment, addressString );
 
}