mmove.c

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/*****************************************************************************
 * ugBASIC - an isomorphic BASIC language compiler for retrocomputers        *
 *****************************************************************************
 * Copyright 2021-2026 Marco Spedaletti (asimov@mclink.it)
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/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION 
 ****************************************************************************/
 
extern char DATATYPE_AS_STRING[][16];

/* <usermanual>
@keyword MMOVE
 
@english
 
This command moves a block of memory of ''size'' bytes between two memory 
locations. In particular, it is possible to indicate whether the destination
or source of the movement is the computer's resident memory or the memory 
dedicated to the video card, which on some targets is separate from the 
main memory.
 
@italian
 
Questo comando sposta un blocco di memoria di ''size'' byte tra due posizioni
di memoria. In particolare, è possibile indicare se la destinazione o la 
sorgente dello spostamento è la memoria residente del computer o la memoria 
dedicata alla scheda video, che su alcuni target è separata dalla memoria 
principale.
 
@syntax MMOVE [MEMORY] address1 TO [MEMORY] address2 SIZE size
@syntax MMOVE [MEMORY] address1 TO VIDEO address2 SIZE size
@syntax MMOVE VIDEO address1 TO [MEMORY] address2 SIZE size
 
@example MMOVE MEMORY &Hc000 TO VIDEO &H8000 SIZE 100
 
</usermanual> */
 
void mmove_memory_memory( Environment * _environment, char * _from, char * _to, char * _size ) {
 
    Variable * from = variable_retrieve_or_define( _environment, _from, VT_ADDRESS, 0 );
    Variable * to = variable_retrieve_or_define( _environment, _to, VT_ADDRESS, 0 );
    Variable * size = variable_retrieve_or_define( _environment, _size, VT_WORD, 0 );
 
    if ( VT_BITWIDTH( size->type ) != 16 ) {
        CRITICAL_CANNOT_MMOVE_INVALID_SIZE( _size );
    }
 
    cpu_mem_move_16bit( _environment, from->realName, to->realName, size->realName );
 
}

void mmove_memory_video( Environment * _environment, char * _from, char * _to, char * _size ) {
 
    Variable * from = variable_retrieve_or_define( _environment, _from, VT_ADDRESS, 0 );
    Variable * to = variable_retrieve_or_define( _environment, _to, VT_ADDRESS, 0 );
    Variable * size = variable_retrieve_or_define( _environment, _size, VT_WORD, 0 );
 
    if ( VT_BITWIDTH( size->type ) != 16 ) {
        CRITICAL_CANNOT_MMOVE_INVALID_SIZE( _size );
    }
 
    cpu_mem_move_16bit( _environment, from->realName, to->realName, size->realName );
 
}

void mmove_video_memory( Environment * _environment, char * _from, char * _to, char * _size ) {
 
    Variable * from = variable_retrieve_or_define( _environment, _from, VT_ADDRESS, 0 );
    Variable * to = variable_retrieve_or_define( _environment, _to, VT_ADDRESS, 0 );
    Variable * size = variable_retrieve_or_define( _environment, _size, VT_WORD, 0 );
 
    if ( VT_BITWIDTH( size->type ) != 16 ) {
        CRITICAL_CANNOT_MMOVE_INVALID_SIZE( _size );
    }
 
    cpu_mem_move_16bit( _environment, from->realName, to->realName, size->realName );
 
}