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/*
* Copyright 2003 - 2009 ( C ) Raster Software Vigo ( Sergio Costas )
* This file is part of FBZX
*
* FBZX is free software ; you can redistribute it and / or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation ; either version 3 of the License , or
* ( at your option ) any later version .
*
* FBZX is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the
* GNU General Public License for more details .
*
* You should have received a copy of the GNU General Public License
* along with this program . If not , see < http : //www.gnu.org/licenses/>.
*
*/
# include "z80free/Z80free.h"
# include "computer.h"
# include "emulator.h"
# include "cargador.h"
# include <stdio.h>
# include <string.h>
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# ifdef DEBUG
extern FILE * fdebug ;
# define printf(...) fprintf(fdebug,__VA_ARGS__)
# else
# ifdef GEKKO
# define printf(...)
# endif
# endif
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void uncompress_z80 ( FILE * fichero , int length , unsigned char * memo ) {
unsigned char byte_loaded , EDfound , counter ;
int position , retval ;
counter = 0 ;
byte_loaded = 0 ;
EDfound = 0 ;
position = 0 ;
printf ( " Descomprimo de longitud %d \n " , length ) ;
do {
if ( counter ) {
memo [ position + + ] = byte_loaded ;
counter - - ;
continue ;
} else
retval = fread ( & byte_loaded , 1 , 1 , fichero ) ;
if ( EDfound = = 2 ) { // we have two EDs
counter = byte_loaded ;
retval = fread ( & byte_loaded , 1 , 1 , fichero ) ;
EDfound = 0 ;
continue ;
}
if ( byte_loaded = = 0xED ) {
EDfound + + ;
} else {
if ( EDfound = = 1 ) { // we found ED xx. We write ED and xx
memo [ position + + ] = 0xED ;
EDfound = 0 ;
}
if ( position > = length ) {
break ;
}
memo [ position + + ] = byte_loaded ;
}
} while ( position < length ) ;
}
int save_z80 ( char * filename ) {
FILE * fichero ;
unsigned char value , bucle ;
int retval ;
fichero = fopen ( filename , " r " ) ;
if ( fichero ! = NULL ) {
fclose ( fichero ) ;
return - 1 ; // file already exists
}
fichero = fopen ( filename , " w " ) ;
if ( fichero = = NULL )
return - 2 ; // can't create file
fprintf ( fichero , " %c%c%c%c%c%c " , procesador . Rm . br . A , procesador . Rm . br . F , procesador . Rm . br . C , procesador . Rm . br . B , procesador . Rm . br . L , procesador . Rm . br . H ) ; // AF, BC and HL
if ( ordenador . mode128k = = 0 ) // 48K
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fprintf ( fichero , " %c%c " , ( byte ) ( procesador . PC & 0x0FF ) , ( byte ) ( ( procesador . PC > > 8 ) & 0xFF ) ) ; // PC
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else
fprintf ( fichero , " %c%c " , 0 , 0 ) ; // 128K
fprintf ( fichero , " %c%c " , procesador . Rm . br . P , procesador . Rm . br . S ) ; // SP
fprintf ( fichero , " %c%c%c " , procesador . I , procesador . R , ( ( ( procesador . R2 > > 7 ) & 0x01 ) | ( ( ordenador . border < < 1 ) & 0x0E ) ) ) ; // I, R and border color
fprintf ( fichero , " %c%c%c%c%c%c%c%c%c%c%c%c%c%c " , procesador . Rm . br . E , procesador . Rm . br . D , procesador . Ra . br . C , procesador . Ra . br . B , procesador . Ra . br . E , procesador . Ra . br . D , procesador . Ra . br . L , procesador . Ra . br . H , procesador . Ra . br . A , procesador . Ra . br . F , procesador . Rm . br . IYl , procesador . Rm . br . IYh , procesador . Rm . br . IXl , procesador . Rm . br . IXh ) ;
if ( procesador . IFF1 )
value = 1 ;
else
value = 0 ;
fprintf ( fichero , " %c " , value ) ;
if ( procesador . IFF2 )
value = 1 ;
else
value = 0 ;
fprintf ( fichero , " %c " , value ) ;
value = procesador . IM ;
if ( ordenador . issue = = 2 )
value | = 4 ;
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switch ( ordenador . joystick [ 0 ] ) { //Only one Joystick in Z80 file
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case 1 :
value | = 64 ;
break ;
case 2 :
value | = 128 ;
break ;
case 3 :
value | = 192 ;
break ;
}
fprintf ( fichero , " %c " , value ) ;
if ( ordenador . mode128k = = 0 ) { // 48K
retval = fwrite ( ( ordenador . memoria + 147456 ) , 16384 , 1 , fichero ) ; // video memory
retval = fwrite ( ( ordenador . memoria + 98304 ) , 32768 , 1 , fichero ) ; // memory pages 2 & 3
fclose ( fichero ) ;
return 0 ;
}
// 128K
fprintf ( fichero , " %c%c " , 23 , 0 ) ; // Z80 file v2.01
fprintf ( fichero , " %c%c " , ( byte ) ( procesador . PC & 0x0FF ) , ( byte ) ( ( procesador . PC > > 8 ) & 0x0FF ) ) ; // PC
fprintf ( fichero , " %c " , 3 ) ; // hardware mode=3
fprintf ( fichero , " %c " , ordenador . mport1 ) ; // content of 0x7FFD latch
fprintf ( fichero , " %c%c " , 0 , 0 ) ; // no If1, no emulation of any kind
fprintf ( fichero , " %c " , ordenador . ay_latch ) ; // last selected AY register
for ( bucle = 0 ; bucle < 16 ; bucle + + )
fprintf ( fichero , " %c " , ordenador . ay_registers [ bucle ] ) ; // AY registers
for ( bucle = 0 ; bucle < 8 ; bucle + + ) {
fprintf ( fichero , " %c%c " , 0xFF , 0xFF ) ; // length=0xFFFF (uncompressed)
fprintf ( fichero , " %c " , bucle + 3 ) ; // page number
retval = fwrite ( ordenador . memoria + ( 16384 * bucle ) + 65536 , 16384 , 1 , fichero ) ; // store page
}
fclose ( fichero ) ;
return 0 ;
}
int load_z80 ( char * filename ) {
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static struct z80snapshot snap ;
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unsigned char tempo [ 30 ] , tempo2 [ 56 ] , memo [ 49152 ] , type , compressed , page , byte_read [ 3 ] ;
FILE * fichero ;
int longitud = 0 , longitud2 , bucle , retval ;
longitud = strlen ( filename ) ;
if ( ( longitud > 4 ) & & ( 0 = = strcasecmp ( " .sna " , filename + ( longitud - 4 ) ) ) ) {
printf ( " Read SNA file \n " ) ;
return load_sna ( filename ) ;
}
printf ( " Read Z80 file \n " ) ;
for ( bucle = 0 ; bucle < 16 ; bucle + + )
snap . ay_regs [ bucle ] = 0 ;
fichero = fopen ( filename , " r " ) ;
if ( fichero = = NULL )
return - 1 ; // error
printf ( " Read header (first 30 bytes) \n " ) ;
retval = fread ( tempo , 1 , 30 , fichero ) ;
if ( ( tempo [ 6 ] = = 0 ) & & ( tempo [ 7 ] = = 0 ) ) { // extended Z80
printf ( " It's an extended Z80 file \n " ) ;
type = 1 ; // new type
retval = fread ( tempo2 , 1 , 2 , fichero ) ; // read the length of the extension
longitud = ( ( int ) tempo2 [ 0 ] ) + 256 * ( ( int ) tempo2 [ 1 ] ) ;
if ( longitud > 54 ) {
fclose ( fichero ) ;
printf ( " Not suported Z80 file \n " ) ;
return - 3 ; // not a supported Z80 file
}
printf ( " Length: %d \n " , longitud ) ;
retval = fread ( tempo2 + 2 , 1 , longitud , fichero ) ;
if ( longitud = = 23 ) // z80 ver 2.01
switch ( tempo2 [ 4 ] ) {
case 0 :
case 1 :
snap . type = 0 ; // 48K
break ;
case 3 :
case 4 :
snap . type = 1 ; // 128K
break ;
default :
fclose ( fichero ) ;
printf ( " Again not suported Z80 file \n " ) ;
return - 3 ; // not a supported Z80 file
break ;
}
else // z80 ver 3.0x
switch ( tempo2 [ 4 ] ) {
case 0 :
case 1 :
case 3 :
snap . type = 0 ; // 48K
break ;
case 4 :
case 5 :
case 6 :
snap . type = 1 ; // 128K
break ;
default :
fclose ( fichero ) ;
return - 3 ; // not a supported Z80 file
break ;
}
} else {
printf ( " Old type z80 \n " ) ;
type = 0 ; // old type
snap . type = 0 ; // 48k
}
if ( tempo [ 29 ] & 0x04 ) {
printf ( " Issue 2 \n " ) ;
snap . issue = 2 ; // issue2
} else {
printf ( " Issue 3 \n " ) ;
snap . issue = 3 ; // issue3
}
snap . A = tempo [ 0 ] ;
snap . F = tempo [ 1 ] ;
snap . C = tempo [ 2 ] ;
snap . B = tempo [ 3 ] ;
snap . L = tempo [ 4 ] ;
snap . H = tempo [ 5 ] ;
if ( type ) {
snap . PC = ( ( word ) tempo2 [ 2 ] ) + 256 * ( ( word ) tempo2 [ 3 ] ) ;
for ( bucle = 0 ; bucle < 16 ; bucle + + )
snap . ay_regs [ bucle ] = tempo2 [ 9 + bucle ] ;
snap . ay_latch = tempo2 [ 8 ] ;
} else {
snap . PC = ( ( word ) tempo [ 6 ] ) + 256 * ( ( word ) tempo [ 7 ] ) ;
}
snap . SP = ( ( word ) tempo [ 8 ] ) + 256 * ( ( word ) tempo [ 9 ] ) ;
snap . I = tempo [ 10 ] ;
snap . R = ( tempo [ 11 ] & 0x7F ) ;
if ( tempo [ 12 ] = = 255 ) {
printf ( " Byte 12 is 255! doing 1 \n " ) ;
tempo [ 12 ] = 1 ;
}
if ( tempo [ 12 ] & 0x01 )
snap . R | = 0x80 ;
snap . border = ( tempo [ 12 ] > > 1 ) & 0x07 ;
if ( tempo [ 12 ] & 32 )
compressed = 1 ;
else
compressed = 0 ;
snap . E = tempo [ 13 ] ;
snap . D = tempo [ 14 ] ;
snap . CC = tempo [ 15 ] ;
snap . BB = tempo [ 16 ] ;
snap . EE = tempo [ 17 ] ;
snap . DD = tempo [ 18 ] ;
snap . LL = tempo [ 19 ] ;
snap . HH = tempo [ 20 ] ;
snap . AA = tempo [ 21 ] ;
snap . FF = tempo [ 22 ] ;
snap . IY = ( ( word ) tempo [ 23 ] ) + 256 * ( ( word ) tempo [ 24 ] ) ;
snap . IX = ( ( word ) tempo [ 25 ] ) + 256 * ( ( word ) tempo [ 26 ] ) ;
if ( tempo [ 27 ] ! = 0 )
snap . IFF1 = 1 ;
else
snap . IFF1 = 0 ;
if ( tempo [ 28 ] ! = 0 )
snap . IFF2 = 1 ;
else
snap . IFF2 = 0 ;
switch ( tempo [ 29 ] & 0x03 ) {
case 0 :
snap . Imode = 0 ;
break ;
case 1 :
snap . Imode = 1 ;
break ;
case 2 :
snap . Imode = 2 ;
break ;
}
snap . joystick = ( ( tempo [ 29 ] > > 6 ) & 0x03 ) ;
if ( type )
snap . pager = tempo2 [ 5 ] ;
if ( type ) { // extended z80
if ( snap . type = = 1 ) { // 128K snapshot
/* fclose(fichero);
return - 3 ; */ // z80 file not yet supported
while ( ! feof ( fichero ) ) {
retval = fread ( byte_read , 3 , 1 , fichero ) ;
if ( feof ( fichero ) )
break ;
longitud2 = ( ( int ) byte_read [ 0 ] ) + 256 * ( ( int ) byte_read [ 1 ] ) ;
switch ( byte_read [ 2 ] ) {
case 3 :
page = 0 ;
break ;
case 4 :
page = 1 ;
break ;
case 5 :
page = 2 ;
break ;
case 6 :
page = 3 ;
break ;
case 7 :
page = 4 ;
break ;
case 8 :
page = 5 ;
break ;
case 9 :
page = 6 ;
break ;
case 10 :
page = 7 ;
break ;
default :
page = 11 ;
break ;
}
printf ( " Loading page %d of length %d \n " , page , longitud ) ;
if ( longitud2 = = 0xFFFF ) // uncompressed raw data
retval = fread ( snap . page [ page ] , 16384 , 1 , fichero ) ;
else
uncompress_z80 ( fichero , 16384 , snap . page [ page ] ) ;
}
} else {
while ( ! feof ( fichero ) ) {
retval = fread ( byte_read , 3 , 1 , fichero ) ;
if ( feof ( fichero ) )
break ;
longitud2 = ( ( int ) byte_read [ 0 ] ) + 256 * ( ( int ) byte_read [ 1 ] ) ;
switch ( byte_read [ 2 ] ) {
case 8 :
page = 0 ;
break ;
case 4 :
page = 1 ;
break ;
case 5 :
page = 2 ;
break ;
default :
page = 11 ;
break ;
}
if ( longitud2 = = 0xFFFF ) // uncompressed raw data
retval = fread ( snap . page [ page ] , 16384 , 1 , fichero ) ;
else
uncompress_z80 ( fichero , 16384 , snap . page [ page ] ) ;
}
}
} else {
if ( compressed ) {
// 48k compressed z80 loader
// we uncompress first the data
uncompress_z80 ( fichero , 49152 , memo ) ;
memcpy ( snap . page [ 0 ] , memo , 16384 ) ;
memcpy ( snap . page [ 1 ] , memo + 16384 , 16384 ) ;
memcpy ( snap . page [ 2 ] , memo + 32768 , 16384 ) ;
} else {
// 48k uncompressed z80 loader
retval = fread ( snap . page [ 0 ] , 16384 , 1 , fichero ) ;
retval = fread ( snap . page [ 1 ] , 16384 , 1 , fichero ) ;
retval = fread ( snap . page [ 2 ] , 16384 , 1 , fichero ) ;
}
}
load_snap ( & snap ) ;
fclose ( fichero ) ;
return 0 ; // all right
}
int load_sna ( char * filename ) {
unsigned char tempo [ 49179 ] ;
unsigned char tempo2 [ 98308 ] ;
unsigned char type = 0 ;
FILE * fichero ;
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static struct z80snapshot snap ;
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unsigned char v1 , v2 ;
int addr , loop ;
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//Some inits
for ( loop = 0 ; loop < 16 ; loop + + )
snap . ay_regs [ loop ] = 0 ;
snap . ay_latch = 0 ;
snap . issue = 3 ;
snap . joystick = 0 ;
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printf ( " Loading SNA file \n " ) ;
fichero = fopen ( filename , " r " ) ;
if ( fichero = = NULL )
return - 1 ; // error
if ( 1 ! = fread ( tempo , 49179 , 1 , fichero ) ) {
return - 1 ;
}
if ( 0 = = fread ( tempo2 , 1 , 98308 , fichero ) ) {
printf ( " 48K SNA \n " ) ;
type = 0 ;
} else {
printf ( " 128K SNA \n " ) ;
type = 1 ;
}
snap . type = type ;
snap . I = tempo [ 0 ] ;
snap . LL = tempo [ 1 ] ;
snap . HH = tempo [ 2 ] ;
snap . EE = tempo [ 3 ] ;
snap . DD = tempo [ 4 ] ;
snap . CC = tempo [ 5 ] ;
snap . BB = tempo [ 6 ] ;
snap . FF = tempo [ 7 ] ;
snap . AA = tempo [ 8 ] ;
snap . L = tempo [ 9 ] ;
snap . H = tempo [ 10 ] ;
snap . E = tempo [ 11 ] ;
snap . D = tempo [ 12 ] ;
snap . C = tempo [ 13 ] ;
snap . B = tempo [ 14 ] ;
snap . IY = ( ( word ) tempo [ 15 ] ) + 256 * ( ( word ) tempo [ 16 ] ) ;
snap . IX = ( ( word ) tempo [ 17 ] ) + 256 * ( ( word ) tempo [ 18 ] ) ;
if ( tempo [ 19 ] & 0x01 ) {
snap . IFF1 = 1 ;
} else {
snap . IFF1 = 0 ;
}
if ( tempo [ 19 ] & 0x02 ) {
snap . IFF2 = 1 ;
} else {
snap . IFF2 = 0 ;
}
snap . R = tempo [ 20 ] ;
snap . F = tempo [ 21 ] ;
snap . A = tempo [ 22 ] ;
snap . SP = ( ( word ) tempo [ 23 ] ) + 256 * ( ( word ) tempo [ 24 ] ) ;
snap . Imode = tempo [ 25 ] ;
snap . border = tempo [ 26 ] ;
if ( type = = 0 ) {
v1 = tempo [ 23 ] ;
v2 = tempo [ 24 ] ;
addr = ( ( int ) v1 ) + 256 * ( ( int ) v2 ) ;
if ( ( addr < 16384 ) | | ( addr > = 65534 ) ) {
printf ( " Error loading SNA file. Return address in ROM. \n " ) ;
return - 1 ;
}
addr - = 16384 ;
addr + = 27 ;
snap . PC = ( ( word ) tempo [ addr ] ) + 256 * ( ( word ) tempo [ addr + 1 ] ) ;
tempo [ addr ] = 0 ;
tempo [ addr + 1 ] = 0 ;
snap . SP + = 2 ;
snap . IFF1 = snap . IFF2 ;
memcpy ( snap . page [ 0 ] , tempo + 27 , 16384 ) ;
memcpy ( snap . page [ 1 ] , tempo + 16411 , 16384 ) ;
memcpy ( snap . page [ 2 ] , tempo + 32795 , 16384 ) ;
} else {
snap . PC = ( ( word ) tempo2 [ 0 ] ) + 256 * ( ( word ) tempo2 [ 1 ] ) ;
memcpy ( snap . page [ 5 ] , tempo + 27 , 16384 ) ;
memcpy ( snap . page [ 2 ] , tempo + 16411 , 16384 ) ;
v1 = tempo [ 2 ] ;
snap . pager = v1 ;
v1 & = 0x07 ;
memcpy ( snap . page [ v1 ] , tempo + 32795 , 16384 ) ;
addr = 4 ;
for ( loop = 0 ; loop < 7 ; loop + + ) {
if ( ( loop = = 2 ) | | ( loop = = 5 ) | | ( loop = = ( ( int ) v1 ) ) ) {
continue ;
}
memcpy ( snap . page [ loop ] , tempo2 + addr , 16384 ) ;
addr + = 16384 ;
}
}
load_snap ( & snap ) ;
return 0 ;
}
void load_snap ( struct z80snapshot * snap ) {
int bucle ;
printf ( " Loading SnapShot \n " ) ;
switch ( snap - > type ) {
case 0 : // 48k
printf ( " Mode 48K \n " ) ;
ordenador . mode128k = 0 ; // 48K mode
ordenador . issue = snap - > issue ;
ResetComputer ( ) ;
break ;
case 1 : // 128k
printf ( " Mode 128K \n " ) ;
ordenador . mode128k = 2 ; // +2 mode
ordenador . issue = 3 ;
ResetComputer ( ) ;
printf ( " Pager: %X \n " , snap - > pager ) ;
Z80free_Out ( 0x7FFD , snap - > pager ) ;
break ;
default :
break ;
}
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ordenador . joystick [ 0 ] = snap - > joystick ; //Only one Joystick in Z80 file
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procesador . Rm . br . A = snap - > A ;
procesador . Rm . br . F = snap - > F ;
procesador . Rm . br . B = snap - > B ;
procesador . Rm . br . C = snap - > C ;
procesador . Rm . br . D = snap - > D ;
procesador . Rm . br . E = snap - > E ;
procesador . Rm . br . H = snap - > H ;
procesador . Rm . br . L = snap - > L ;
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printf ( " A:%x F:%x B:%x C:%x D:%x E:%x H:%x L:%x \n " , snap - > A , snap - > F , snap - > B , snap - > C , snap - > D , snap - > E , snap - > H , snap - > L ) ;
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procesador . Ra . br . A = snap - > AA ;
procesador . Ra . br . F = snap - > FF ;
procesador . Ra . br . B = snap - > BB ;
procesador . Ra . br . C = snap - > CC ;
procesador . Ra . br . D = snap - > DD ;
procesador . Ra . br . E = snap - > EE ;
procesador . Ra . br . H = snap - > HH ;
procesador . Ra . br . L = snap - > LL ;
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printf ( " A:%x F:%x B:%x C:%x D:%x E:%x H:%x L:%x \n " , snap - > AA , snap - > FF , snap - > BB , snap - > CC , snap - > DD , snap - > EE , snap - > HH , snap - > LL ) ;
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procesador . Rm . wr . IX = snap - > IX ;
procesador . Rm . wr . IY = snap - > IY ;
procesador . Rm . wr . SP = snap - > SP ;
procesador . PC = snap - > PC ;
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printf ( " IX:%x IY:%x SP:%x PC:%x \n " , snap - > IX , snap - > IY , snap - > SP , snap - > PC ) ;
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procesador . I = snap - > I ;
procesador . R = snap - > R ;
procesador . R2 = snap - > R ;
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printf ( " I:%x R:%x \n " , snap - > I , snap - > R ) ;
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if ( snap - > IFF1 ) {
procesador . IFF1 = 1 ;
} else {
procesador . IFF1 = 0 ;
}
if ( snap - > IFF2 ) {
procesador . IFF2 = 1 ;
} else {
procesador . IFF2 = 0 ;
}
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printf ( " IFF1:%x IFF2:%x \n " , snap - > IFF1 , snap - > IFF1 ) ;
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procesador . IM = snap - > Imode ;
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printf ( " IM:%x \n " , snap - > Imode ) ;
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Z80free_Out ( 0xFFFE , ( ( snap - > border & 0x07 ) | 0x10 ) ) ;
switch ( snap - > type ) {
case 0 : // 48K
for ( bucle = 0 ; bucle < 16384 ; bucle + + ) {
ordenador . memoria [ bucle + 147456 ] = snap - > page [ 0 ] [ bucle ] ;
ordenador . memoria [ bucle + 98304 ] = snap - > page [ 1 ] [ bucle ] ;
ordenador . memoria [ bucle + 114688 ] = snap - > page [ 2 ] [ bucle ] ;
}
ordenador . ay_emul = 0 ;
break ;
case 1 : // 128K
for ( bucle = 0 ; bucle < 16384 ; bucle + + ) {
ordenador . memoria [ bucle + 65536 ] = snap - > page [ 0 ] [ bucle ] ;
ordenador . memoria [ bucle + 81920 ] = snap - > page [ 1 ] [ bucle ] ;
ordenador . memoria [ bucle + 98304 ] = snap - > page [ 2 ] [ bucle ] ;
ordenador . memoria [ bucle + 114688 ] = snap - > page [ 3 ] [ bucle ] ;
ordenador . memoria [ bucle + 131072 ] = snap - > page [ 4 ] [ bucle ] ;
ordenador . memoria [ bucle + 147456 ] = snap - > page [ 5 ] [ bucle ] ;
ordenador . memoria [ bucle + 163840 ] = snap - > page [ 6 ] [ bucle ] ;
ordenador . memoria [ bucle + 180224 ] = snap - > page [ 7 ] [ bucle ] ;
}
ordenador . ay_emul = 1 ;
for ( bucle = 0 ; bucle < 16 ; bucle + + )
ordenador . ay_registers [ bucle ] = snap - > ay_regs [ bucle ] ;
ordenador . ay_latch = snap - > ay_latch ;
break ;
default :
break ;
}
}