expansion.c

 /*
  * UAE - The Un*x Amiga Emulator
  *
  * AutoConfig (tm) Expansions (ZorroII/III)
  *
  * Copyright 1996,1997 Stefan Reinauer <stepan@linux.de>
  * Copyright 1997 Brian King <Brian_King@Mitel.com>
  *   - added gfxcard code
  *
  */

#include "sysconfig.h"
#include "sysdeps.h"

#include "options.h"
#include "uae.h"
#include "memory.h"
#include "custom.h"
#include "newcpu.h"
#include "autoconf.h"
#include "xwin.h"
#include "savestate.h"
#include "zfile.h"

#define MAX_EXPANSION_BOARDS	8

/* ********************************************************** */
/* 00 / 02 */
/* er_Type */

#define Z2_MEM_8MB	0x00 /* Size of Memory Block */
#define Z2_MEM_4MB	0x07
#define Z2_MEM_2MB	0x06
#define Z2_MEM_1MB	0x05
#define Z2_MEM_512KB	0x04
#define Z2_MEM_256KB	0x03
#define Z2_MEM_128KB	0x02
#define Z2_MEM_64KB	0x01
/* extended definitions */
#define Z2_MEM_16MB	0x00
#define Z2_MEM_32MB	0x01
#define Z2_MEM_64MB	0x02
#define Z2_MEM_128MB	0x03
#define Z2_MEM_256MB	0x04
#define Z2_MEM_512MB	0x05
#define Z2_MEM_1GB	0x06

#define chainedconfig	0x08 /* Next config is part of the same card */
#define rom_card	0x10 /* ROM vector is valid */
#define add_memory	0x20 /* Link RAM into free memory list */

#define zorroII		0xc0 /* Type of Expansion Card */
#define zorroIII	0x80

/* ********************************************************** */
/* 04 - 06 & 10-16 */

/* Manufacturer */
#define commodore_g	 513 /* Commodore Braunschweig (Germany) */
#define commodore	 514 /* Commodore West Chester */
#define gvp		2017 /* GVP */
#define ass		2102 /* Advanced Systems & Software */
#define hackers_id	2011 /* Special ID for test cards */

/* Card Type */
#define commodore_a2091	     3 /* A2091 / A590 Card from C= */
#define commodore_a2091_ram 10 /* A2091 / A590 Ram on HD-Card */
#define commodore_a2232	    70 /* A2232 Multiport Expansion */
#define ass_nexus_scsi	     1 /* Nexus SCSI Controller */

#define gvp_series_2_scsi   11
#define gvp_iv_24_gfx	    32

/* ********************************************************** */
/* 08 - 0A  */
/* er_Flags */
#define Z3_MEM_64KB	0x02
#define Z3_MEM_128KB	0x03
#define Z3_MEM_256KB	0x04
#define Z3_MEM_512KB	0x05
#define Z3_MEM_1MB	0x06 /* Zorro III card subsize */
#define Z3_MEM_2MB	0x07
#define Z3_MEM_4MB	0x08
#define Z3_MEM_6MB	0x09
#define Z3_MEM_8MB	0x0a
#define Z3_MEM_10MB	0x0b
#define Z3_MEM_12MB	0x0c
#define Z3_MEM_14MB	0x0d
#define Z3_MEM_16MB	0x00
#define Z3_MEM_AUTO	0x01
#define Z3_MEM_defunct1	0x0e
#define Z3_MEM_defunct2	0x0f

#define force_z3	0x10 /* *MUST* be set if card is Z3 */
#define ext_size	0x20 /* Use extended size table for bits 0-2 of er_Type */
#define no_shutup	0x40 /* Card cannot receive Shut_up_forever */
#define care_addr	0x80 /* Adress HAS to be $200000-$9fffff */

/* ********************************************************** */
/* 40-42 */
/* ec_interrupt (unused) */

#define enable_irq	0x01 /* enable Interrupt */
#define reset_card	0x04 /* Reset of Expansion Card - must be 0 */
#define card_int2	0x10 /* READ ONLY: IRQ 2 active */
#define card_irq6	0x20 /* READ ONLY: IRQ 6 active */
#define card_irq7	0x40 /* READ ONLY: IRQ 7 active */
#define does_irq	0x80 /* READ ONLY: Card currently throws IRQ */

/* ********************************************************** */

/* ROM defines (DiagVec) */

#define rom_4bit	(0x00<<14) /* ROM width */
#define rom_8bit	(0x01<<14)
#define rom_16bit	(0x02<<14)

#define rom_never	(0x00<<12) /* Never run Boot Code */
#define rom_install	(0x01<<12) /* run code at install time */
#define rom_binddrv	(0x02<<12) /* run code with binddrivers */

uaecptr ROM_filesys_resname, ROM_filesys_resid;
uaecptr ROM_filesys_diagentry;
uaecptr ROM_hardfile_resname, ROM_hardfile_resid;
uaecptr ROM_hardfile_init;

/* ********************************************************** */

static void (*card_init[MAX_EXPANSION_BOARDS]) (void);
static void (*card_map[MAX_EXPANSION_BOARDS]) (void);

static int ecard;

/* ********************************************************** */

/* Please note: ZorroIII implementation seems to work different
 * than described in the HRM. This claims that ZorroIII config
 * address is 0xff000000 while the ZorroII config space starts
 * at 0x00e80000. In reality, both, Z2 and Z3 cards are
 * configured in the ZorroII config space. Kickstart 3.1 doesn't
 * even do a single read or write access to the ZorroIII space.
 * The original Amiga include files tell the same as the HRM.
 * ZorroIII: If you set ext_size in er_Flags and give a Z2-size
 * in er_Type you can very likely add some ZorroII address space
 * to a ZorroIII card on a real Amiga. This is not implemented
 * yet.
 *  -- Stefan
 *
 * Surprising that 0xFF000000 isn't used. Maybe it depends on the
 * ROM. Anyway, the HRM says that Z3 cards may appear in Z2 config
 * space, so what we are doing here is correct.
 *  -- Bernd
 */

/* Autoconfig address space at 0xE80000 */
static uae_u8 expamem[65536];

static uae_u8 expamem_lo;
static uae_u16 expamem_hi;

/*
 *  Dummy entries to show that there's no card in a slot
 */

static void expamem_map_clear (void)
{
    write_log ("expamem_map_clear() got called. Shouldn't happen.\n");
}

static void expamem_init_clear (void)
{
    memset (expamem, 0xff, sizeof expamem);
}
static void expamem_init_clear2 (void)
{
    expamem_init_clear();
    ecard = MAX_EXPANSION_BOARDS - 1;
}

static uae_u32 expamem_lget (uaecptr) REGPARAM;
static uae_u32 expamem_wget (uaecptr) REGPARAM;
static uae_u32 expamem_bget (uaecptr) REGPARAM;
static void expamem_lput (uaecptr, uae_u32) REGPARAM;
static void expamem_wput (uaecptr, uae_u32) REGPARAM;
static void expamem_bput (uaecptr, uae_u32) REGPARAM;

addrbank expamem_bank = {
    expamem_lget, expamem_wget, expamem_bget,
    expamem_lput, expamem_wput, expamem_bput,
    default_xlate, default_check, NULL
};

static uae_u32 REGPARAM2 expamem_lget (uaecptr addr)
{
#ifdef JIT
    special_mem |= S_READ;
#endif
    write_log ("warning: READ.L from address $%lx \n", addr);
    return 0xfffffffful;
}

static uae_u32 REGPARAM2 expamem_wget (uaecptr addr)
{
#ifdef JIT
    special_mem |= S_READ;
#endif
    write_log ("warning: READ.W from address $%lx \n", addr);
    return 0xffff;
}

static uae_u32 REGPARAM2 expamem_bget (uaecptr addr)
{
#ifdef JIT
    special_mem |= S_READ;
#endif
    addr &= 0xFFFF;
    return expamem[addr];
}

static void REGPARAM2 expamem_write (uaecptr addr, uae_u32 value)
{
#ifdef JIT
    special_mem |= S_WRITE;
#endif
    addr &= 0xffff;
    if (addr == 00 || addr == 02 || addr == 0x40 || addr == 0x42) {
	expamem[addr] = (value & 0xf0);
	expamem[addr + 2] = (value & 0x0f) << 4;
    } else {
	expamem[addr] = ~(value & 0xf0);
	expamem[addr + 2] = ~((value & 0x0f) << 4);
    }
}

static int REGPARAM2 expamem_type (void)
{
    return ((expamem[0] | expamem[2] >> 4) & 0xc0);
}

static void REGPARAM2 expamem_lput (uaecptr addr, uae_u32 value)
{
#ifdef JIT
    special_mem |= S_WRITE;
#endif
    write_log ("warning: WRITE.L to address $%lx : value $%lx\n", addr, value);
}

static void REGPARAM2 expamem_wput (uaecptr addr, uae_u32 value)
{
#ifdef JIT
    special_mem |= S_WRITE;
#endif
    if (expamem_type() != zorroIII)
	write_log ("warning: WRITE.W to address $%lx : value $%x\n", addr, value);
    else {
	switch (addr & 0xff) {
	 case 0x44:
	    if (expamem_type() == zorroIII) {
		// +Bernd Roesch
		value = value - 0x3000;  // maps to 0x10000000
		chipmem_wput (regs.regs[11] + 0x20, value);
		chipmem_wput (regs.regs[11] + 0x28, value);
		// -Bernd Roesch
		expamem_hi = value;
		(*card_map[ecard]) ();
		write_log ("   Card %d (Zorro%s) done.\n", ecard + 1, expamem_type() == 0xc0 ? "II" : "III");
		++ecard;
		if (ecard < MAX_EXPANSION_BOARDS)
		    (*card_init[ecard]) ();
		else
		    expamem_init_clear2 ();
	    }
	    break;
	}
    }
}

static void REGPARAM2 expamem_bput (uaecptr addr, uae_u32 value)
{
#ifdef JIT
    special_mem |= S_WRITE;
#endif
    switch (addr & 0xff) {
     case 0x30:
     case 0x32:
	expamem_hi = 0;
	expamem_lo = 0;
	expamem_write (0x48, 0x00);
	break;

     case 0x48:
	if (expamem_type () == zorroII) {
	    expamem_hi = value & 0xFF;
	    (*card_map[ecard]) ();
	    write_log ("   Card %d (Zorro%s) done.\n", ecard + 1, expamem_type() == 0xc0 ? "II" : "III");
	    ++ecard;
	    if (ecard < MAX_EXPANSION_BOARDS)
		(*card_init[ecard]) ();
	    else
		expamem_init_clear2 ();
	} else if (expamem_type() == zorroIII)
	    expamem_lo = value;
	break;

     case 0x4a:
	if (expamem_type () == zorroII)
	    expamem_lo = value;
	break;

     case 0x4c:
	write_log ("   Card %d (Zorro %s) had no success.\n", ecard + 1, expamem_type() == 0xc0 ? "II" : "III");
	++ecard;
	if (ecard < MAX_EXPANSION_BOARDS)
	    (*card_init[ecard]) ();
	else
	    expamem_init_clear2 ();
	break;
    }
}

/* ********************************************************** */

/*
 *  Fast Memory
 */

static uae_u32 fastmem_mask;

static uae_u32 fastmem_lget (uaecptr) REGPARAM;
static uae_u32 fastmem_wget (uaecptr) REGPARAM;
static uae_u32 fastmem_bget (uaecptr) REGPARAM;
static void fastmem_lput (uaecptr, uae_u32) REGPARAM;
static void fastmem_wput (uaecptr, uae_u32) REGPARAM;
static void fastmem_bput (uaecptr, uae_u32) REGPARAM;
static int fastmem_check (uaecptr addr, uae_u32 size) REGPARAM;
static uae_u8 *fastmem_xlate (uaecptr addr) REGPARAM;

static uae_u32 fastmem_start; /* Determined by the OS */
static uae_u8 *fastmemory;

uae_u32 REGPARAM2 fastmem_lget (uaecptr addr)
{
    uae_u8 *m;
    addr -= fastmem_start & fastmem_mask;
    addr &= fastmem_mask;
    m = fastmemory + addr;
    return do_get_mem_long ((uae_u32 *)m);
}

uae_u32 REGPARAM2 fastmem_wget (uaecptr addr)
{
    uae_u8 *m;
    addr -= fastmem_start & fastmem_mask;
    addr &= fastmem_mask;
    m = fastmemory + addr;
    return do_get_mem_word ((uae_u16 *)m);
}

uae_u32 REGPARAM2 fastmem_bget (uaecptr addr)
{
    addr -= fastmem_start & fastmem_mask;
    addr &= fastmem_mask;
    return fastmemory[addr];
}

void REGPARAM2 fastmem_lput (uaecptr addr, uae_u32 l)
{
    uae_u8 *m;
    addr -= fastmem_start & fastmem_mask;
    addr &= fastmem_mask;
    m = fastmemory + addr;
    do_put_mem_long ((uae_u32 *)m, l);
}

void REGPARAM2 fastmem_wput (uaecptr addr, uae_u32 w)
{
    uae_u8 *m;
    addr -= fastmem_start & fastmem_mask;
    addr &= fastmem_mask;
    m = fastmemory + addr;
    do_put_mem_word ((uae_u16 *)m, w);
}

void REGPARAM2 fastmem_bput (uaecptr addr, uae_u32 b)
{
    addr -= fastmem_start & fastmem_mask;
    addr &= fastmem_mask;
    fastmemory[addr] = b;
}

static int REGPARAM2 fastmem_check (uaecptr addr, uae_u32 size)
{
    addr -= fastmem_start & fastmem_mask;
    addr &= fastmem_mask;
    return (addr + size) <= allocated_fastmem;
}

static uae_u8 REGPARAM2 *fastmem_xlate (uaecptr addr)
{
    addr -= fastmem_start & fastmem_mask;
    addr &= fastmem_mask;
    return fastmemory + addr;
}

addrbank fastmem_bank = {
    fastmem_lget, fastmem_wget, fastmem_bget,
    fastmem_lput, fastmem_wput, fastmem_bput,
    fastmem_xlate, fastmem_check, NULL
};


/*
 * Filesystem device ROM
 * This is very simple, the Amiga shouldn't be doing things with it.
 */

#ifdef FILESYS

static uae_u32 filesys_lget (uaecptr) REGPARAM;
static uae_u32 filesys_wget (uaecptr) REGPARAM;
static uae_u32 filesys_bget (uaecptr) REGPARAM;
static void filesys_lput (uaecptr, uae_u32) REGPARAM;
static void filesys_wput (uaecptr, uae_u32) REGPARAM;
static void filesys_bput (uaecptr, uae_u32) REGPARAM;

static uae_u32 filesys_start; /* Determined by the OS */
uae_u8 *filesysory;

uae_u32 REGPARAM2 filesys_lget (uaecptr addr)
{
    uae_u8 *m;
#ifdef JIT
    special_mem |= S_READ;
#endif
    addr -= filesys_start & 65535;
    addr &= 65535;
    m = filesysory + addr;
    return do_get_mem_long ((uae_u32 *)m);
}

uae_u32 REGPARAM2 filesys_wget (uaecptr addr)
{
    uae_u8 *m;
#ifdef JIT
    special_mem |= S_READ;
#endif
    addr -= filesys_start & 65535;
    addr &= 65535;
    m = filesysory + addr;
    return do_get_mem_word ((uae_u16 *)m);
}

uae_u32 REGPARAM2 filesys_bget (uaecptr addr)
{
#ifdef JIT
    special_mem |= S_READ;
#endif
    addr -= filesys_start & 65535;
    addr &= 65535;
    return filesysory[addr];
}

static void REGPARAM2 filesys_lput (uaecptr addr, uae_u32 l)
{
#ifdef JIT
    special_mem |= S_WRITE;
#endif
    write_log ("filesys_lput called PC=%p\n", m68k_getpc (&regs));
}

static void REGPARAM2 filesys_wput (uaecptr addr, uae_u32 w)
{
#ifdef JIT
    special_mem |= S_WRITE;
#endif
    write_log ("filesys_wput called PC=%p\n", m68k_getpc (&regs));
}

static void REGPARAM2 filesys_bput (uaecptr addr, uae_u32 b)
{
#ifdef JIT
    special_mem |= S_WRITE;
#endif
    write_log ("filesys_bput called. This usually means that you are using\n");
    write_log ("Kickstart 1.2. Please give UAE the \"-a\" option next time\n");
    write_log ("you start it. If you are _not_ using Kickstart 1.2, then\n");
    write_log ("there's a bug somewhere.\n");
    write_log ("Exiting...\n");
    uae_quit ();
}

static addrbank filesys_bank = {
    filesys_lget, filesys_wget, filesys_bget,
    filesys_lput, filesys_wput, filesys_bput,
    default_xlate, default_check, NULL
};

#endif // FILESYS

/* ********************************************************** */

/*
 *     Expansion Card (ZORRO II) for 1/2/4/8 MB of Fast Memory
 */

static void expamem_map_fastcard (void)
{
    fastmem_start = ((expamem_hi | (expamem_lo >> 4)) << 16);
    map_banks (&fastmem_bank, fastmem_start >> 16, allocated_fastmem >> 16, allocated_fastmem);
    write_log ("Fastcard: mapped @$%lx: %dMB fast memory\n", fastmem_start, allocated_fastmem >> 20);
}

static void expamem_init_fastcard (void)
{
    expamem_init_clear();
    if (allocated_fastmem == 0x100000)
	expamem_write (0x00, Z2_MEM_1MB + add_memory + zorroII);
    else if (allocated_fastmem == 0x200000)
	expamem_write (0x00, Z2_MEM_2MB + add_memory + zorroII);
    else if (allocated_fastmem == 0x400000)
	expamem_write (0x00, Z2_MEM_4MB + add_memory + zorroII);
    else if (allocated_fastmem == 0x800000)
	expamem_write (0x00, Z2_MEM_8MB + add_memory + zorroII);

    expamem_write (0x08, care_addr);

    expamem_write (0x04, 1);

    expamem_write (0x10, hackers_id >> 8);
    expamem_write (0x14, hackers_id & 0xff);

    expamem_write (0x18, 0x00); /* ser.no. Byte 0 */
    expamem_write (0x1c, 0x00); /* ser.no. Byte 1 */
    expamem_write (0x20, 0x00); /* ser.no. Byte 2 */
    expamem_write (0x24, 0x01); /* ser.no. Byte 3 */

    expamem_write (0x28, 0x00); /* Rom-Offset hi */
    expamem_write (0x2c, 0x00); /* ROM-Offset lo */

    expamem_write (0x40, 0x00); /* Ctrl/Statusreg.*/
}

/* ********************************************************** */

#ifdef FILESYS

/*
 * Filesystem device
 */

static void expamem_map_filesys (void)
{
    uaecptr a;

    filesys_start = ((expamem_hi | (expamem_lo >> 4)) << 16);
    map_banks (&filesys_bank, filesys_start >> 16, 1, 0);
    write_log ("Filesystem: mapped memory @$%lx.\n", filesys_start);
    /* 68k code needs to know this. */
    a = here ();
    org (RTAREA_BASE+0xFFFC);
    dl (filesys_start + 0x2000);
    org (a);
}

static void expamem_init_filesys (void)
{
    /* struct DiagArea - the size has to be large enough to store several device ROMTags */
    uae_u8 diagarea[] = { 0x90, 0x00, /* da_Config, da_Flags */
                          0x02, 0x00, /* da_Size */
                          0x01, 0x00, /* da_DiagPoint */
                          0x01, 0x06  /* da_BootPoint */
    };

    expamem_init_clear();
    expamem_write (0x00, Z2_MEM_64KB | rom_card | zorroII);

    expamem_write (0x08, no_shutup);

    expamem_write (0x04, 2);
    expamem_write (0x10, hackers_id >> 8);
    expamem_write (0x14, hackers_id & 0xff);

    expamem_write (0x18, 0x00); /* ser.no. Byte 0 */
    expamem_write (0x1c, 0x00); /* ser.no. Byte 1 */
    expamem_write (0x20, 0x00); /* ser.no. Byte 2 */
    expamem_write (0x24, 0x01); /* ser.no. Byte 3 */

    /* er_InitDiagVec */
    expamem_write (0x28, 0x10); /* Rom-Offset hi */
    expamem_write (0x2c, 0x00); /* ROM-Offset lo */

    expamem_write (0x40, 0x00); /* Ctrl/Statusreg.*/

    /* Build a DiagArea */
    memcpy (expamem + 0x1000, diagarea, sizeof diagarea);

    /* Call DiagEntry */
    do_put_mem_word ((uae_u16 *)(expamem + 0x1100), 0x4EF9); /* JMP */
    do_put_mem_long ((uae_u32 *)(expamem + 0x1102), ROM_filesys_diagentry);

    /* What comes next is a plain bootblock */
    do_put_mem_word ((uae_u16 *)(expamem + 0x1106), 0x4EF9); /* JMP */
    do_put_mem_long ((uae_u32 *)(expamem + 0x1108), EXPANSION_bootcode);

    memcpy (filesysory, expamem, 0x3000);
}

#endif

#ifdef SAVESTATE
static size_t fast_filepos;
#endif

static void allocate_expamem (void)
{
    currprefs.fastmem_size = changed_prefs.fastmem_size;

    if (allocated_fastmem != currprefs.fastmem_size) {
	if (fastmemory)
	    mapped_free (fastmemory);
	fastmemory = 0;
	allocated_fastmem = currprefs.fastmem_size;
	fastmem_mask = allocated_fastmem - 1;

	if (allocated_fastmem) {
	    fastmemory = mapped_malloc (allocated_fastmem, "fast");
	    if (fastmemory == 0) {
		write_log ("Out of memory for fastmem card.\n");
		gui_message("Out of memory for fastmem card.\n");//ric
		allocated_fastmem = 0;
	    }
	}
	clearexec ();
    }
    
	fastmem_bank.baseaddr = fastmemory;

#ifdef SAVESTATE
    if (savestate_state == STATE_RESTORE) {
	if (allocated_fastmem > 0) {
	    restore_ram (fast_filepos, fastmemory);
	    map_banks (&fastmem_bank, fastmem_start >> 16, currprefs.fastmem_size >> 16,
		       allocated_fastmem);
	}
  }
#endif /* SAVESTATE */
}

extern int cdtv_enabled;

void expamem_reset (void)
{
    int do_mount = 1;
    int cardno = 0;
    ecard = 0;

    allocate_expamem ();

#ifdef CDTV
    if (cdtv_enabled)
        map_banks (&dmac_bank, dmac_start >> 16, 0x10000 >> 16, 0x10000);
#endif

    /* check if Kickstart version is below 1.3 */
    if (! ersatzkickfile && kickstart_version
	&& (/* Kickstart 1.0 & 1.1! */
	    kickstart_version == 0xFFFF
	    /* Kickstart < 1.3 */
	    || kickstart_version < 34))
    {
	/* warn user */
	write_log ("Kickstart version is below 1.3!  Disabling autoconfig devices.\n");
	do_mount = 0;
    }
#ifdef FILESYS
    /* No need for filesystem stuff if there aren't any mounted.  */
    if (nr_units (currprefs.mountinfo) == 0)
	do_mount = 0;
#endif

    if (fastmemory != NULL) {
	card_init[cardno] = expamem_init_fastcard;
	card_map[cardno++] = expamem_map_fastcard;
    }
#ifdef FILESYS
    if (do_mount && ! ersatzkickfile) {
	card_init[cardno] = expamem_init_filesys;
	card_map[cardno++] = expamem_map_filesys;
    }
#endif
    while (cardno < MAX_EXPANSION_BOARDS) {
	card_init[cardno] = expamem_init_clear;
	card_map[cardno++] = expamem_map_clear;
    }

    (*card_init[0]) ();
}

void expansion_init (void)
{
    fastmemory = 0;
    allocated_fastmem = 0;
    fastmem_mask = fastmem_start = 0;
    fastmemory = 0;
#ifdef FILESYS
    filesys_start = 0;
    filesysory = 0;
#endif

    allocate_expamem ();

#ifdef FILESYS
    filesysory = (uae_u8 *) mapped_malloc (0x10000, "filesys");
    if (!filesysory) {
	write_log ("virtual memory exhausted (filesysory)!\n");
	exit (0);
    }
    filesys_bank.baseaddr = (uae_u8*)filesysory;
#endif
}

void expansion_cleanup (void)
{
    if (fastmemory)
	mapped_free (fastmemory);
#ifdef FILESYS
    if (filesysory)
	mapped_free (filesysory);
    filesysory = 0;
#endif
    fastmemory = 0;
}


#ifdef SAVESTATE

/* State save/restore code.  */

uae_u8 *save_fram (uae_u32 *len)
{
    *len = allocated_fastmem;
    return fastmemory;
}

void restore_fram (uae_u32 len, size_t filepos)
{
    fast_filepos = filepos;
    changed_prefs.fastmem_size = len;
}

uae_u8 *save_expansion (uae_u32 *len, uae_u8 *dstptr)
{
    static uae_u8 t[20];
    uae_u8 *dst = t, *dstbak = t;
    if (dstptr)
	dst = dstbak = dstptr;
    save_u32 (fastmem_start);
    *len = 4 + 4 + 4;
    return dstbak;
}

const uae_u8 *restore_expansion (const uae_u8 *src)
{
    fastmem_start = restore_u32 ();
    return src;
}

#endif /* SAVESTATE */