memdef.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 MEMDEF
 
@english
 
The ''MEMDEF'' is a collective command for all expansion memory settings 
required for a transfer. First you specify the number of ''bytes'' to be transferred 
(see ''MEMLEN''), then the ''address'' in the target computer (see ''MEMOR''). This is
followed by the expansion memory address (''eaddress'), including the ''bank'' (''MEMPOS''). 
 
@italian
 
Il comando ''MEMDEF'' è un comando collettivo per tutte le impostazioni di memoria di 
espansione richieste per un trasferimento. Per prima cosa si specifica il numero di ''byte'' 
da trasferire (vedere ''MEMLEN''), quindi l''address'' nel computer di destinazione (vedere 
''MEMOR''). Questo è seguito dall'indirizzo di memoria di espansione (''eaddress'), incluso il
''bank'' (''MEMPOS'').
 
@syntax MEMDEF bytes[, address[, eaddress, bank]]
 
@example MEMDEF 128, &HC000
 
@usedInExample tsb_memload.bas
 
@seeAlso MEMLEN
@seeAlso MEMPOS
@seeAlso MEMCONT
@seeAlso MEMRESTORE
@seeAlso MEMLOAD
@seeAlso MEMSAVE
 
</usermanual> */
 
void memdef( Environment * _environment, char * _size, char * _address, char * _eaddress, char * _bank ) {
 
    Variable * membank = variable_retrieve_or_define( _environment, "MEMBANK", VT_BYTE, 0 );
    Variable * mempos = variable_retrieve_or_define( _environment, "MEMPOS", VT_ADDRESS, 0 );
    Variable * memor = variable_retrieve_or_define( _environment, "MEMOR", VT_ADDRESS, 0 );
    Variable * memlen = variable_retrieve_or_define( _environment, "MEMLEN", VT_WORD, 0 );
 
    Variable * size = variable_retrieve_or_define( _environment, _size, VT_ADDRESS, 0 );
 
    variable_move( _environment, size->name, memlen->name );
 
    if ( _address ) {
        Variable * address = variable_retrieve_or_define( _environment, _address, VT_ADDRESS, 0 );
        variable_move( _environment, address->name, memor->name );
    }
 
    if ( _eaddress ) {
        Variable * eaddress = variable_retrieve_or_define( _environment, _eaddress, VT_ADDRESS, 0 );
        variable_move( _environment, eaddress->name, mempos->name );
    }
 
    if ( _bank ) {
        Variable * bank = variable_retrieve_or_define( _environment, _bank, VT_ADDRESS, 0 );
        variable_move( _environment, bank->name, membank->name );
    }
 
}