tiles.c

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/*****************************************************************************
 * 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");
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/****************************************************************************
 * 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 c64
</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 c64
</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 );
 
}