diff --git a/src/hp48_init.c b/src/hp48_init.c
index ded751c..1eeded9 100644
--- a/src/hp48_init.c
+++ b/src/hp48_init.c
@@ -25,145 +25,6 @@ long port2_size;
 long port2_mask;
 short port2_is_ram;
 
-typedef struct old_keystate_t {
-    int rows[ 9 ];
-} old_keystate_t;
-
-typedef struct old_saturn_t {
-    unsigned char A[ 16 ], B[ 16 ], C[ 16 ], D[ 16 ];
-    long d[ 2 ];
-    int P;
-    long PC;
-    unsigned char R0[ 16 ], R1[ 16 ], R2[ 16 ], R3[ 16 ], R4[ 16 ];
-    unsigned char IN[ 4 ];
-    unsigned char OUT[ 3 ];
-    int CARRY;
-    unsigned char PSTAT[ NR_PSTAT ];
-    unsigned char XM, SB, SR, MP;
-    unsigned char hexmode;
-    long rstk[ NR_RSTK ];
-    short rstkp;
-    old_keystate_t keybuf;
-    unsigned char intenable;
-    unsigned char int_pending;
-    unsigned char kbd_ien;
-    long configs[ NR_CONFIG ];
-    short daisy_state;
-    long ram32k;
-    long devices;
-    unsigned char disp_io;
-    unsigned char contrast_ctrl;
-    unsigned char disp_test;
-    unsigned int crc;
-    unsigned char power_status;
-    unsigned char power_ctrl;
-    unsigned char mode;
-    unsigned char annunc;
-    unsigned char baud;
-    unsigned char card_ctrl;
-    unsigned char card_status;
-    unsigned char io_ctrl;
-    unsigned char rcs;
-    unsigned char tcs;
-    unsigned char rbr;
-    unsigned char tbr;
-    unsigned char sreq;
-    unsigned char ir_ctrl;
-    unsigned char base_off;
-    unsigned char lcr;
-    unsigned char lbr;
-    unsigned char scratch;
-    unsigned char base_nibble;
-    long disp_addr;
-    long line_offset;
-    long line_count;
-    long unknown;
-    unsigned char t1_ctrl;
-    unsigned char t2_ctrl;
-    long menu_addr;
-    long unknown2;
-    int timer1;
-    long timer2;
-    long t1_instr;
-    long t2_instr;
-    unsigned char* rom;
-    unsigned char* ram;
-    unsigned char* port1;
-    unsigned char* port2;
-} old_saturn_t;
-
-old_saturn_t old_saturn;
-
-typedef struct saturn_0_3_0_t {
-    unsigned long magic;
-    char version[ 4 ];
-    unsigned char A[ 16 ], B[ 16 ], C[ 16 ], D[ 16 ];
-    word_20 d[ 2 ];
-    word_4 P;
-    word_20 PC;
-    unsigned char R0[ 16 ], R1[ 16 ], R2[ 16 ], R3[ 16 ], R4[ 16 ];
-    unsigned char IN[ 4 ];
-    unsigned char OUT[ 3 ];
-    word_1 CARRY;
-    unsigned char PSTAT[ NR_PSTAT ];
-    unsigned char XM, SB, SR, MP;
-    word_4 hexmode;
-    word_20 rstk[ NR_RSTK ];
-    short rstkp;
-    keystate_t keybuf;
-    unsigned char intenable;
-    unsigned char int_pending;
-    unsigned char kbd_ien;
-    word_20 configs[ NR_CONFIG ];
-    word_16 daisy_state;
-    word_20 ram32k;
-    word_20 devices;
-    word_4 disp_io;
-    word_4 contrast_ctrl;
-    word_8 disp_test;
-    word_16 crc;
-    word_4 power_status;
-    word_4 power_ctrl;
-    word_4 mode;
-    word_8 annunc;
-    word_4 baud;
-    word_4 card_ctrl;
-    word_4 card_status;
-    word_4 io_ctrl;
-    word_4 rcs;
-    word_4 tcs;
-    word_8 rbr;
-    word_8 tbr;
-    word_8 sreq;
-    word_4 ir_ctrl;
-    word_4 base_off;
-    word_4 lcr;
-    word_4 lbr;
-    word_4 scratch;
-    word_4 base_nibble;
-    word_20 disp_addr;
-    word_12 line_offset;
-    word_8 line_count;
-    word_16 unknown;
-    word_4 t1_ctrl;
-    word_4 t2_ctrl;
-    word_20 menu_addr;
-    word_8 unknown2;
-    char timer1;
-    word_32 timer2;
-    long t1_instr;
-    long t2_instr;
-    short t1_tick;
-    short t2_tick;
-    long i_per_s;
-    unsigned char* rom;
-    unsigned char* ram;
-    unsigned char* port1;
-    unsigned char* port2;
-} saturn_0_3_0_t;
-
-saturn_0_3_0_t saturn_0_3_0;
-
 void saturn_config_init( void ) {
     saturn.version[ 0 ] = VERSION_MAJOR;
     saturn.version[ 1 ] = VERSION_MINOR;
@@ -213,273 +74,6 @@ void init_saturn( void ) {
     dev_memory_init();
 }
 
-void copy_old_saturn( old_saturn_t* old, saturn_t* newt ) {
-    int i;
-
-    memcpy( &( newt->A[ 0 ] ), &( old->A[ 0 ] ), 16 );
-    memcpy( &( newt->B[ 0 ] ), &( old->B[ 0 ] ), 16 );
-    memcpy( &( newt->C[ 0 ] ), &( old->C[ 0 ] ), 16 );
-    memcpy( &( newt->D[ 0 ] ), &( old->D[ 0 ] ), 16 );
-    newt->d[ 0 ] = old->d[ 0 ];
-    newt->d[ 1 ] = old->d[ 1 ];
-    newt->P = old->P;
-    newt->PC = old->PC;
-    memcpy( &( newt->R0[ 0 ] ), &( old->R0[ 0 ] ), 16 );
-    memcpy( &( newt->R1[ 0 ] ), &( old->R1[ 0 ] ), 16 );
-    memcpy( &( newt->R2[ 0 ] ), &( old->R2[ 0 ] ), 16 );
-    memcpy( &( newt->R3[ 0 ] ), &( old->R3[ 0 ] ), 16 );
-    memcpy( &( newt->R4[ 0 ] ), &( old->R4[ 0 ] ), 16 );
-    memcpy( &( newt->IN[ 0 ] ), &( old->IN[ 0 ] ), 4 );
-    memcpy( &( newt->OUT[ 0 ] ), &( old->OUT[ 0 ] ), 3 );
-    newt->CARRY = old->CARRY;
-    memcpy( &( newt->PSTAT[ 0 ] ), &( old->PSTAT[ 0 ] ), NR_PSTAT );
-    newt->XM = old->XM;
-    newt->SB = old->SB;
-    newt->SR = old->SR;
-    newt->MP = old->MP;
-    newt->hexmode = old->hexmode;
-    memcpy( &( newt->rstk[ 0 ] ), &( old->rstk[ 0 ] ),
-            NR_RSTK * sizeof( word_20 ) );
-    newt->rstkp = old->rstkp;
-    for ( i = 0; i < 9; i++ ) {
-        newt->keybuf.rows[ i ] = old->keybuf.rows[ i ];
-    }
-    newt->intenable = old->intenable;
-    newt->int_pending = old->int_pending;
-    newt->kbd_ien = old->kbd_ien;
-    newt->disp_io = old->disp_io;
-    newt->contrast_ctrl = old->contrast_ctrl;
-    newt->disp_test = old->disp_test;
-    newt->crc = old->crc;
-    newt->power_status = old->power_status;
-    newt->power_ctrl = old->power_ctrl;
-    newt->mode = old->mode;
-    newt->annunc = old->annunc;
-    newt->baud = old->baud;
-    newt->card_ctrl = old->card_ctrl;
-    newt->card_status = old->card_status;
-    newt->io_ctrl = old->io_ctrl;
-    newt->rcs = old->rcs;
-    newt->tcs = old->tcs;
-    newt->rbr = old->rbr;
-    newt->tbr = old->tbr;
-    newt->sreq = old->sreq;
-    newt->ir_ctrl = old->ir_ctrl;
-    newt->base_off = old->base_off;
-    newt->lcr = old->lcr;
-    newt->lbr = old->lbr;
-    newt->scratch = old->scratch;
-    newt->base_nibble = old->base_nibble;
-    newt->disp_addr = old->disp_addr;
-    newt->line_offset = old->line_offset;
-    newt->line_count = old->line_count;
-    newt->unknown = old->unknown;
-    newt->t1_ctrl = old->t1_ctrl;
-    newt->t2_ctrl = old->t2_ctrl;
-    newt->menu_addr = old->menu_addr;
-    newt->unknown2 = old->unknown2;
-    newt->timer1 = old->timer1;
-    newt->timer2 = old->timer2;
-    newt->t1_instr = old->t1_instr;
-    newt->t2_instr = old->t2_instr;
-    newt->bank_switch = 0;
-    if ( opt_gx ) {
-        newt->mem_cntl[ 0 ].unconfigured = 0;
-        newt->mem_cntl[ 0 ].config[ 0 ] = 0x00100;
-        newt->mem_cntl[ 1 ].unconfigured = 0;
-        newt->mem_cntl[ 1 ].config[ 0 ] = 0x80000;
-        newt->mem_cntl[ 1 ].config[ 1 ] = 0xc0000;
-        newt->mem_cntl[ 2 ].unconfigured = 0;
-        newt->mem_cntl[ 2 ].config[ 0 ] = 0x7f000;
-        newt->mem_cntl[ 2 ].config[ 1 ] = 0xff000;
-        newt->mem_cntl[ 3 ].unconfigured = 0;
-        newt->mem_cntl[ 3 ].config[ 0 ] = 0xc0000;
-        newt->mem_cntl[ 3 ].config[ 1 ] = 0xc0000;
-        newt->mem_cntl[ 4 ].unconfigured = 0;
-        newt->mem_cntl[ 4 ].config[ 0 ] = 0xc0000;
-        newt->mem_cntl[ 4 ].config[ 1 ] = 0xc0000;
-        newt->mem_cntl[ 5 ].unconfigured = 0;
-        newt->mem_cntl[ 5 ].config[ 0 ] = 0x00000;
-        newt->mem_cntl[ 5 ].config[ 1 ] = 0x00000;
-    } else {
-        if ( old->devices == 0x100 ) {
-            newt->mem_cntl[ 0 ].unconfigured = 0;
-            newt->mem_cntl[ 0 ].config[ 0 ] = old->devices;
-        } else {
-            newt->mem_cntl[ 0 ].unconfigured = 1;
-            newt->mem_cntl[ 0 ].config[ 0 ] = 0x00000;
-        }
-        if ( old->ram32k == 0x70000 ) {
-            newt->mem_cntl[ 1 ].unconfigured = 0;
-            newt->mem_cntl[ 1 ].config[ 0 ] = 0x70000;
-            newt->mem_cntl[ 1 ].config[ 1 ] = 0xf0000;
-        } else if ( old->ram32k == 0xf0000 ) {
-            newt->mem_cntl[ 1 ].unconfigured = 0;
-            newt->mem_cntl[ 1 ].config[ 0 ] = 0xf0000;
-            newt->mem_cntl[ 1 ].config[ 1 ] = 0xf0000;
-        } else if ( old->ram32k == 0xfc000 ) {
-            newt->mem_cntl[ 1 ].unconfigured = 0;
-            newt->mem_cntl[ 1 ].config[ 0 ] = 0x70000;
-            newt->mem_cntl[ 1 ].config[ 1 ] = 0xfc000;
-        } else if ( old->ram32k == 0xfe000 ) {
-            newt->mem_cntl[ 1 ].unconfigured = 0;
-            newt->mem_cntl[ 1 ].config[ 0 ] = 0x70000;
-            newt->mem_cntl[ 1 ].config[ 1 ] = 0xfe000;
-        } else {
-            newt->mem_cntl[ 1 ].unconfigured = 2;
-            newt->mem_cntl[ 1 ].config[ 0 ] = 0x00000;
-            newt->mem_cntl[ 1 ].config[ 1 ] = 0x00000;
-        }
-        newt->mem_cntl[ 2 ].unconfigured = 0;
-        newt->mem_cntl[ 2 ].config[ 0 ] = 0x80000;
-        newt->mem_cntl[ 2 ].config[ 1 ] = 0xc0000;
-        newt->mem_cntl[ 3 ].unconfigured = 0;
-        newt->mem_cntl[ 3 ].config[ 0 ] = 0xc0000;
-        newt->mem_cntl[ 3 ].config[ 1 ] = 0xc0000;
-        newt->mem_cntl[ 4 ].unconfigured = 0;
-        newt->mem_cntl[ 4 ].config[ 0 ] = 0xd0000;
-        newt->mem_cntl[ 4 ].config[ 1 ] = 0xff000;
-        newt->mem_cntl[ 5 ].unconfigured = 0;
-        newt->mem_cntl[ 5 ].config[ 0 ] = 0x00000;
-        newt->mem_cntl[ 5 ].config[ 1 ] = 0x80000;
-    }
-}
-
-void copy_0_3_0_saturn( saturn_0_3_0_t* old, saturn_t* newt ) {
-    int i;
-
-    memcpy( &( newt->A[ 0 ] ), &( old->A[ 0 ] ), 16 );
-    memcpy( &( newt->B[ 0 ] ), &( old->B[ 0 ] ), 16 );
-    memcpy( &( newt->C[ 0 ] ), &( old->C[ 0 ] ), 16 );
-    memcpy( &( newt->D[ 0 ] ), &( old->D[ 0 ] ), 16 );
-    newt->d[ 0 ] = old->d[ 0 ];
-    newt->d[ 1 ] = old->d[ 1 ];
-    newt->P = old->P;
-    newt->PC = old->PC;
-    memcpy( &( newt->R0[ 0 ] ), &( old->R0[ 0 ] ), 16 );
-    memcpy( &( newt->R1[ 0 ] ), &( old->R1[ 0 ] ), 16 );
-    memcpy( &( newt->R2[ 0 ] ), &( old->R2[ 0 ] ), 16 );
-    memcpy( &( newt->R3[ 0 ] ), &( old->R3[ 0 ] ), 16 );
-    memcpy( &( newt->R4[ 0 ] ), &( old->R4[ 0 ] ), 16 );
-    memcpy( &( newt->IN[ 0 ] ), &( old->IN[ 0 ] ), 4 );
-    memcpy( &( newt->OUT[ 0 ] ), &( old->OUT[ 0 ] ), 3 );
-    newt->CARRY = old->CARRY;
-    memcpy( &( newt->PSTAT[ 0 ] ), &( old->PSTAT[ 0 ] ), NR_PSTAT );
-    newt->XM = old->XM;
-    newt->SB = old->SB;
-    newt->SR = old->SR;
-    newt->MP = old->MP;
-    newt->hexmode = old->hexmode;
-    memcpy( &( newt->rstk[ 0 ] ), &( old->rstk[ 0 ] ),
-            NR_RSTK * sizeof( word_20 ) );
-    newt->rstkp = old->rstkp;
-    for ( i = 0; i < 9; i++ ) {
-        newt->keybuf.rows[ i ] = old->keybuf.rows[ i ];
-    }
-    newt->intenable = old->intenable;
-    newt->int_pending = old->int_pending;
-    newt->kbd_ien = old->kbd_ien;
-    newt->disp_io = old->disp_io;
-    newt->contrast_ctrl = old->contrast_ctrl;
-    newt->disp_test = old->disp_test;
-    newt->crc = old->crc;
-    newt->power_status = old->power_status;
-    newt->power_ctrl = old->power_ctrl;
-    newt->mode = old->mode;
-    newt->annunc = old->annunc;
-    newt->baud = old->baud;
-    newt->card_ctrl = old->card_ctrl;
-    newt->card_status = old->card_status;
-    newt->io_ctrl = old->io_ctrl;
-    newt->rcs = old->rcs;
-    newt->tcs = old->tcs;
-    newt->rbr = old->rbr;
-    newt->tbr = old->tbr;
-    newt->sreq = old->sreq;
-    newt->ir_ctrl = old->ir_ctrl;
-    newt->base_off = old->base_off;
-    newt->lcr = old->lcr;
-    newt->lbr = old->lbr;
-    newt->scratch = old->scratch;
-    newt->base_nibble = old->base_nibble;
-    newt->disp_addr = old->disp_addr;
-    newt->line_offset = old->line_offset;
-    newt->line_count = old->line_count;
-    newt->unknown = old->unknown;
-    newt->t1_ctrl = old->t1_ctrl;
-    newt->t2_ctrl = old->t2_ctrl;
-    newt->menu_addr = old->menu_addr;
-    newt->unknown2 = old->unknown2;
-    newt->timer1 = old->timer1;
-    newt->timer2 = old->timer2;
-    newt->t1_instr = old->t1_instr;
-    newt->t2_instr = old->t2_instr;
-    newt->t1_tick = old->t1_tick;
-    newt->t2_tick = old->t2_tick;
-    newt->i_per_s = old->i_per_s;
-    newt->bank_switch = 0;
-    if ( opt_gx ) {
-        newt->mem_cntl[ 0 ].unconfigured = 0;
-        newt->mem_cntl[ 0 ].config[ 0 ] = 0x00100;
-        newt->mem_cntl[ 1 ].unconfigured = 0;
-        newt->mem_cntl[ 1 ].config[ 0 ] = 0x80000;
-        newt->mem_cntl[ 1 ].config[ 1 ] = 0xc0000;
-        newt->mem_cntl[ 2 ].unconfigured = 0;
-        newt->mem_cntl[ 2 ].config[ 0 ] = 0x7f000;
-        newt->mem_cntl[ 2 ].config[ 1 ] = 0xff000;
-        newt->mem_cntl[ 3 ].unconfigured = 0;
-        newt->mem_cntl[ 3 ].config[ 0 ] = 0xc0000;
-        newt->mem_cntl[ 3 ].config[ 1 ] = 0xc0000;
-        newt->mem_cntl[ 4 ].unconfigured = 0;
-        newt->mem_cntl[ 4 ].config[ 0 ] = 0xc0000;
-        newt->mem_cntl[ 4 ].config[ 1 ] = 0xc0000;
-        newt->mem_cntl[ 5 ].unconfigured = 0;
-        newt->mem_cntl[ 5 ].config[ 0 ] = 0x00000;
-        newt->mem_cntl[ 5 ].config[ 1 ] = 0x00000;
-    } else {
-        if ( old->devices == 0x100 ) {
-            newt->mem_cntl[ 0 ].unconfigured = 0;
-            newt->mem_cntl[ 0 ].config[ 0 ] = old->devices;
-        } else {
-            newt->mem_cntl[ 0 ].unconfigured = 1;
-            newt->mem_cntl[ 0 ].config[ 0 ] = 0x00000;
-        }
-        if ( old->ram32k == 0x70000 ) {
-            newt->mem_cntl[ 1 ].unconfigured = 0;
-            newt->mem_cntl[ 1 ].config[ 0 ] = 0x70000;
-            newt->mem_cntl[ 1 ].config[ 1 ] = 0xf0000;
-        } else if ( old->ram32k == 0xf0000 ) {
-            newt->mem_cntl[ 1 ].unconfigured = 0;
-            newt->mem_cntl[ 1 ].config[ 0 ] = 0xf0000;
-            newt->mem_cntl[ 1 ].config[ 1 ] = 0xf0000;
-        } else if ( old->ram32k == 0xfc000 ) {
-            newt->mem_cntl[ 1 ].unconfigured = 0;
-            newt->mem_cntl[ 1 ].config[ 0 ] = 0x70000;
-            newt->mem_cntl[ 1 ].config[ 1 ] = 0xfc000;
-        } else if ( old->ram32k == 0xfe000 ) {
-            newt->mem_cntl[ 1 ].unconfigured = 0;
-            newt->mem_cntl[ 1 ].config[ 0 ] = 0x70000;
-            newt->mem_cntl[ 1 ].config[ 1 ] = 0xfe000;
-        } else {
-            newt->mem_cntl[ 1 ].unconfigured = 2;
-            newt->mem_cntl[ 1 ].config[ 0 ] = 0x00000;
-            newt->mem_cntl[ 1 ].config[ 1 ] = 0x00000;
-        }
-        newt->mem_cntl[ 2 ].unconfigured = 0;
-        newt->mem_cntl[ 2 ].config[ 0 ] = 0x80000;
-        newt->mem_cntl[ 2 ].config[ 1 ] = 0xc0000;
-        newt->mem_cntl[ 3 ].unconfigured = 0;
-        newt->mem_cntl[ 3 ].config[ 0 ] = 0xc0000;
-        newt->mem_cntl[ 3 ].config[ 1 ] = 0xc0000;
-        newt->mem_cntl[ 4 ].unconfigured = 0;
-        newt->mem_cntl[ 4 ].config[ 0 ] = 0xd0000;
-        newt->mem_cntl[ 4 ].config[ 1 ] = 0xff000;
-        newt->mem_cntl[ 5 ].unconfigured = 0;
-        newt->mem_cntl[ 5 ].config[ 0 ] = 0x00000;
-        newt->mem_cntl[ 5 ].config[ 1 ] = 0x80000;
-    }
-}
-
 int read_8( FILE* fp, word_8* var ) {
     unsigned char tmp;
 
@@ -547,171 +141,7 @@ int read_u_long( FILE* fp, unsigned long* var ) {
     return 1;
 }
 
-int read_version_0_3_0_file( FILE* fp ) {
-    int i;
-
-    /*
-     * version 0.3.x, read in the saturn_0_3_0_t struct
-     */
-    for ( i = 0; i < 16; i++ )
-        if ( !read_8( fp, &saturn_0_3_0.A[ i ] ) )
-            return 0;
-    for ( i = 0; i < 16; i++ )
-        if ( !read_8( fp, &saturn_0_3_0.B[ i ] ) )
-            return 0;
-    for ( i = 0; i < 16; i++ )
-        if ( !read_8( fp, &saturn_0_3_0.C[ i ] ) )
-            return 0;
-    for ( i = 0; i < 16; i++ )
-        if ( !read_8( fp, &saturn_0_3_0.D[ i ] ) )
-            return 0;
-    if ( !read_32( fp, &saturn_0_3_0.d[ 0 ] ) )
-        return 0;
-    if ( !read_32( fp, &saturn_0_3_0.d[ 1 ] ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.P ) )
-        return 0;
-    if ( !read_32( fp, &saturn_0_3_0.PC ) )
-        return 0;
-    for ( i = 0; i < 16; i++ )
-        if ( !read_8( fp, &saturn_0_3_0.R0[ i ] ) )
-            return 0;
-    for ( i = 0; i < 16; i++ )
-        if ( !read_8( fp, &saturn_0_3_0.R1[ i ] ) )
-            return 0;
-    for ( i = 0; i < 16; i++ )
-        if ( !read_8( fp, &saturn_0_3_0.R2[ i ] ) )
-            return 0;
-    for ( i = 0; i < 16; i++ )
-        if ( !read_8( fp, &saturn_0_3_0.R3[ i ] ) )
-            return 0;
-    for ( i = 0; i < 16; i++ )
-        if ( !read_8( fp, &saturn_0_3_0.R4[ i ] ) )
-            return 0;
-    for ( i = 0; i < 4; i++ )
-        if ( !read_8( fp, &saturn_0_3_0.IN[ i ] ) )
-            return 0;
-    for ( i = 0; i < 3; i++ )
-        if ( !read_8( fp, &saturn_0_3_0.OUT[ i ] ) )
-            return 0;
-    if ( !read_8( fp, &saturn_0_3_0.CARRY ) )
-        return 0;
-    for ( i = 0; i < NR_PSTAT; i++ )
-        if ( !read_8( fp, &saturn_0_3_0.PSTAT[ i ] ) )
-            return 0;
-    if ( !read_8( fp, &saturn_0_3_0.XM ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.SB ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.SR ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.MP ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.hexmode ) )
-        return 0;
-    for ( i = 0; i < NR_RSTK; i++ )
-        if ( !read_32( fp, &saturn_0_3_0.rstk[ i ] ) )
-            return 0;
-    if ( !read_16( fp, ( word_16* )&saturn_0_3_0.rstkp ) )
-        return 0;
-    for ( i = 0; i < 9; i++ )
-        if ( !read_16( fp, ( word_16* )&saturn_0_3_0.keybuf.rows[ i ] ) )
-            return 0;
-    if ( !read_8( fp, &saturn_0_3_0.intenable ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.int_pending ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.kbd_ien ) )
-        return 0;
-    for ( i = 0; i < NR_CONFIG; i++ )
-        if ( !read_32( fp, &saturn_0_3_0.configs[ i ] ) )
-            return 0;
-    if ( !read_16( fp, ( word_16* )&saturn_0_3_0.daisy_state ) )
-        return 0;
-    if ( !read_32( fp, &saturn_0_3_0.ram32k ) )
-        return 0;
-    if ( !read_32( fp, &saturn_0_3_0.devices ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.disp_io ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.contrast_ctrl ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.disp_test ) )
-        return 0;
-    if ( !read_16( fp, &saturn_0_3_0.crc ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.power_status ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.power_ctrl ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.mode ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.annunc ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.baud ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.card_ctrl ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.card_status ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.io_ctrl ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.rcs ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.tcs ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.rbr ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.tbr ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.sreq ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.ir_ctrl ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.base_off ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.lcr ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.lbr ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.scratch ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.base_nibble ) )
-        return 0;
-    if ( !read_32( fp, &saturn_0_3_0.disp_addr ) )
-        return 0;
-    if ( !read_16( fp, &saturn_0_3_0.line_offset ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.line_count ) )
-        return 0;
-    if ( !read_16( fp, &saturn_0_3_0.unknown ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.t1_ctrl ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.t2_ctrl ) )
-        return 0;
-    if ( !read_32( fp, &saturn_0_3_0.menu_addr ) )
-        return 0;
-    if ( !read_8( fp, &saturn_0_3_0.unknown2 ) )
-        return 0;
-    if ( !read_char( fp, &saturn_0_3_0.timer1 ) )
-        return 0;
-    if ( !read_32( fp, &saturn_0_3_0.timer2 ) )
-        return 0;
-    if ( !read_32( fp, &saturn_0_3_0.t1_instr ) )
-        return 0;
-    if ( !read_32( fp, &saturn_0_3_0.t2_instr ) )
-        return 0;
-    if ( !read_16( fp, ( word_16* )&saturn_0_3_0.t1_tick ) )
-        return 0;
-    if ( !read_16( fp, ( word_16* )&saturn_0_3_0.t2_tick ) )
-        return 0;
-    if ( !read_32( fp, &saturn_0_3_0.i_per_s ) )
-        return 0;
-    return 1;
-}
-
-int read_version_0_4_0_file( FILE* fp ) {
+int read_hp48_file( FILE* fp ) {
     int i;
 
     /*
@@ -1056,34 +486,11 @@ int read_files( void ) {
 
     if ( X48_MAGIC != saturn.magic ) {
         /*
-         * no MAGIC number, try to read old format file
+         * no MAGIC number, exiting
          */
-        fseek( fp, 0, SEEK_SET );
-        if ( fread( ( char* )&old_saturn, 1, sizeof( old_saturn ), fp ) ==
-             sizeof( old_saturn ) ) {
-            /*
-             * seems to work
-             */
-            copy_old_saturn( &old_saturn, &saturn );
-            if ( !quiet )
-                fprintf( stderr, "%s: %s seems to be an old version file\n",
-                         progname, fnam );
-            saturn.magic = X48_MAGIC;
-            saturn.t1_tick = 8192;
-            saturn.t2_tick = 16;
-            saturn.i_per_s = 0;
-            saturn.version[ 0 ] = VERSION_MAJOR;
-            saturn.version[ 1 ] = VERSION_MINOR;
-            saturn.version[ 2 ] = PATCHLEVEL;
-            saturn.version[ 3 ] = COMPILE_VERSION;
-        } else {
-            /*
-             * no, initialize
-             */
-            if ( !quiet )
-                fprintf( stderr, "%s: can\'t handle %s\n", progname, fnam );
-            init_saturn();
-        }
+        fprintf( stderr, "You seem to try to load an old saved state. Try "
+                         "running a recent x48 (0.6.4) before trying x48ng." );
+        exit( 99 );
     } else {
         /*
          * MAGIC ok, read and compare the version
@@ -1107,58 +514,15 @@ int read_files( void ) {
             v2 |= ( ( int )PATCHLEVEL & 0xff ) << 8;
             v2 |= ( ( int )COMPILE_VERSION & 0xff );
 
-            if ( ( v1 & 0xffffff00 ) < ( v2 & 0xffffff00 ) ) {
+            /*
+             * try to read latest version file
+             */
+            if ( !read_hp48_file( fp ) ) {
                 if ( !quiet )
-                    fprintf( stderr,
-                             "%s: %s is a version %d.%d.%d file, converting\n",
-                             progname, fnam, saturn.version[ 0 ],
-                             saturn.version[ 1 ], saturn.version[ 2 ] );
-            } else if ( ( v2 & 0xffffff00 ) < ( v1 & 0xffffff00 ) ) {
-                if ( !quiet )
-                    fprintf( stderr,
-                             "%s: %s is a version %d.%d.%d file, trying ...\n",
-                             progname, fnam, saturn.version[ 0 ],
-                             saturn.version[ 1 ], saturn.version[ 2 ] );
-            }
-
-            if ( v1 < 0x00040000 ) {
-                /*
-                 * read version < 0.4 file
-                 */
-                if ( !read_version_0_3_0_file( fp ) ) {
-                    if ( !quiet )
-                        fprintf( stderr, "%s: can\'t handle %s\n", progname,
-                                 fnam );
-                    init_saturn();
-                } else {
-                    copy_0_3_0_saturn( &saturn_0_3_0, &saturn );
-                    if ( verbose )
-                        printf( "%s: read %s\n", progname, fnam );
-                }
-            } else if ( v1 <= v2 ) {
-                /*
-                 * read latest version file
-                 */
-                if ( !read_version_0_4_0_file( fp ) ) {
-                    if ( !quiet )
-                        fprintf( stderr, "%s: can\'t handle %s\n", progname,
-                                 fnam );
-                    init_saturn();
-                } else if ( verbose ) {
-                    printf( "%s: read %s\n", progname, fnam );
-                }
-            } else {
-                /*
-                 * try to read latest version file
-                 */
-                if ( !read_version_0_4_0_file( fp ) ) {
-                    if ( !quiet )
-                        fprintf( stderr, "%s: can\'t handle %s\n", progname,
-                                 fnam );
-                    init_saturn();
-                } else if ( verbose ) {
-                    printf( "%s: read %s\n", progname, fnam );
-                }
+                    fprintf( stderr, "%s: can\'t handle %s\n", progname, fnam );
+                init_saturn();
+            } else if ( verbose ) {
+                printf( "%s: read %s\n", progname, fnam );
             }
         }
     }