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disk.cpp
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/*
* UAE - The Un*x Amiga Emulator
*
* Floppy disk emulation
*
* Copyright 1995 Hannu Rummukainen
* Copyright 1995-2001 Bernd Schmidt
* Copyright 2000-2021 Toni Wilen
*
* Original High Density Drive Handling by Dr. Adil Temel (C) 2001 [[email protected]]
*
* Small modifications to support abstracted Floppy Disk "Bridges" to hardware, Copyright 2021 Robert Smith, https://amiga.robsmithdev.co.uk
*
*/
#include "sysconfig.h"
#include "sysdeps.h"
int disk_debug_logging = 0;
int disk_debug_mode = 0;
int disk_debug_track = -1;
#define REVOLUTION_DEBUG 0
#define MFM_VALIDATOR 0
#include "uae.h"
#include "options.h"
#include "memory.h"
#include "events.h"
#include "custom.h"
#include "disk.h"
#include "gui.h"
#include "zfile.h"
#include "newcpu.h"
#include "osemu.h"
#include "execlib.h"
#include "savestate.h"
#include "cia.h"
#include "debug.h"
#ifdef FDI2RAW
#include "fdi2raw.h"
#endif
#include "catweasel.h"
#include "driveclick.h"
#ifdef CAPS
#include "caps/caps_win32.h"
#endif
#ifdef SCP
#include "scp.h"
#endif
#include "crc32.h"
#include "inputrecord.h"
#include "amax.h"
#ifdef RETROPLATFORM
#include "rp.h"
#endif
#include "fsdb.h"
#include "statusline.h"
#include "rommgr.h"
#include "tinyxml2.h"
#ifdef FLOPPYBRIDGE
#include "floppybridge/floppybridge_abstract.h"
#include "floppybridge/floppybridge_lib.h"
#endif
#undef CATWEASEL
int floppy_writemode = 0;
/* support HD floppies */
#define FLOPPY_DRIVE_HD
/* Writable track length with normal 2us bitcell/300RPM motor, 12688 PAL, 12784 NTSC */
/* DMA clock / (7 clocks per bit * 5 revs per second * 8 bits per byte) */
#define FLOPPY_WRITE_LEN_PAL 12668 // 3546895 / (7 * 5 * 8)
#define FLOPPY_WRITE_LEN_NTSC 12784 // 3579545 / (7 * 5 * 8)
#define FLOPPY_WRITE_LEN (currprefs.floppy_write_length > 256 ? currprefs.floppy_write_length / 2 : (currprefs.ntscmode ? (FLOPPY_WRITE_LEN_NTSC / 2) : (FLOPPY_WRITE_LEN_PAL / 2)))
#define FLOPPY_WRITE_MAXLEN 0x3800
/* This works out to 350 PAL, 408 NTSC */
#define FLOPPY_GAP_LEN (FLOPPY_WRITE_LEN - 11 * 544)
/* 7 CCK per bit */
#define NORMAL_FLOPPY_SPEED (7 * 256)
/* max supported floppy drives, for small memory systems */
#define MAX_FLOPPY_DRIVES 4
#ifdef FLOPPY_DRIVE_HD
#define DDHDMULT 2
#else
#define DDHDMULT 1
#endif
#define MAX_SECTORS (DDHDMULT * 11)
#undef DEBUG_DRIVE_ID
/* UAE-1ADF (ADF_EXT2)
* W reserved
* W number of tracks (default 2*80=160)
*
* W reserved
* W type, 0=normal AmigaDOS track, 1 = raw MFM (upper byte = disk revolutions - 1)
* L available space for track in bytes (must be even)
* L track length in bits
*/
static int side, direction, reserved_side;
static uae_u8 selected = 15, disabled, reserved;
static uae_u8 writebuffer[544 * MAX_SECTORS];
static uae_u8 writesecheadbuffer[16 * MAX_SECTORS];
#define DISK_INDEXSYNC 1
#define DISK_WORDSYNC 2
#define DISK_REVOLUTION 4 /* 8,16,32,64 */
#define DSKREADY_UP_TIME 18
#define DSKREADY_DOWN_TIME 24
#define DSKDMA_OFF 0
#define DSKDMA_INIT 1
#define DSKDMA_READ 2
#define DSKDMA_WRITE 3
static int dskdmaen, dsklength, dsklength2, dsklen;
static uae_u16 dskbytr_val;
static uae_u32 dskpt;
static bool fifo_filled;
static uae_u16 fifo[3];
static int fifo_inuse[3];
static int dma_enable, bitoffset, syncoffset;
static uae_u16 word, dsksync;
static unsigned long dsksync_cycles;
#define WORDSYNC_TIME 11
/* Always carried through to the next line. */
int disk_hpos;
static int disk_jitter;
static int indexdecay;
static uae_u8 prev_data;
static int prev_step;
static bool initial_disk_statusline;
static struct diskinfo disk_info_data = { 0 };
static bool amax_enabled;
typedef enum { TRACK_AMIGADOS, TRACK_RAW, TRACK_RAW1, TRACK_PCDOS, TRACK_DISKSPARE, TRACK_NONE } image_tracktype;
typedef struct {
uae_u16 len;
int offs, extraoffs;
int bitlen, track;
uae_u16 sync;
image_tracktype type;
int revolutions;
} trackid;
#define MAX_TRACKS (2 * 83)
/* We have three kinds of Amiga floppy drives
* - internal A500/A2000 drive:
* ID is always DRIVE_ID_NONE (S.T.A.G expects this)
* - HD drive (A3000/A4000):
* ID is DRIVE_ID_35DD if DD floppy is inserted or drive is empty
* ID is DRIVE_ID_35HD if HD floppy is inserted
* - regular external drive:
* ID is always DRIVE_ID_35DD
*/
#define DRIVE_ID_NONE 0x00000000
#define DRIVE_ID_35DD 0xFFFFFFFF
#define DRIVE_ID_35HD 0xAAAAAAAA
#define DRIVE_ID_525SD 0x55555555 /* 40 track 5.25 drive , kickstart does not recognize this */
typedef enum { ADF_NONE = -1, ADF_NORMAL, ADF_EXT1, ADF_EXT2, ADF_FDI, ADF_IPF, ADF_SCP, ADF_CATWEASEL, ADF_PCDOS, ADF_KICK, ADF_SKICK, ADF_NORMAL_HEADER, ADF_FLOPPYBRIDGE } drive_filetype;
typedef struct {
struct zfile *diskfile;
struct zfile *writediskfile;
struct zfile *pcdecodedfile;
drive_filetype filetype;
trackid trackdata[MAX_TRACKS];
trackid writetrackdata[MAX_TRACKS];
int buffered_cyl, buffered_side;
int cyl;
bool motoroff;
int motordelay; /* dskrdy needs some clock cycles before it changes after switching off motor */
bool state;
int selected_delay;
bool wrprot;
bool forcedwrprot;
uae_u16 bigmfmbuf[0x4000 * DDHDMULT];
uae_u16 tracktiming[0x4000 * DDHDMULT];
int multi_revolution;
int revolution_check;
int skipoffset;
int mfmpos;
int indexoffset;
int tracklen;
int revolutions;
int prevtracklen;
int trackspeed;
int num_tracks, write_num_tracks, num_secs, num_heads;
int hard_num_cyls;
bool dskeject;
bool dskchange;
int dskchange_time;
bool dskready;
int dskready_up_time;
int dskready_down_time;
int writtento;
int steplimit;
frame_time_t steplimitcycle;
int indexhack, indexhackmode;
int ddhd; /* 1=DD 2=HD */
int drive_id_scnt; /* drive id shift counter */
int idbit;
unsigned long drive_id; /* drive id to be reported */
TCHAR newname[256]; /* storage space for new filename during eject delay */
bool newnamewriteprotected;
uae_u32 crc32;
#ifdef FDI2RAW
FDI *fdi;
#endif
int useturbo;
int floppybitcounter; /* number of bits left */
#ifdef CATWEASEL
catweasel_drive *catweasel;
#else
int catweasel;
int amax;
int lastdataacesstrack;
int lastrev;
bool track_access_done;
bool fourms;
#endif
#ifdef FLOPPYBRIDGE
FloppyDiskBridge *bridge;
bool writepending;
#endif
} drive;
#define MIN_STEPLIMIT_CYCLE (CYCLE_UNIT * 140)
static uae_u16 bigmfmbufw[0x4000 * DDHDMULT];
static drive floppy[MAX_FLOPPY_DRIVES];
static TCHAR dfxhistory[HISTORY_MAX][MAX_PREVIOUS_IMAGES][MAX_DPATH];
static uae_u8 exeheader[]={0x00,0x00,0x03,0xf3,0x00,0x00,0x00,0x00};
static uae_u8 bootblock_ofs[]={
0x44,0x4f,0x53,0x00,0xc0,0x20,0x0f,0x19,0x00,0x00,0x03,0x70,0x43,0xfa,0x00,0x18,
0x4e,0xae,0xff,0xa0,0x4a,0x80,0x67,0x0a,0x20,0x40,0x20,0x68,0x00,0x16,0x70,0x00,
0x4e,0x75,0x70,0xff,0x60,0xfa,0x64,0x6f,0x73,0x2e,0x6c,0x69,0x62,0x72,0x61,0x72,
0x79
};
static uae_u8 bootblock_ffs[]={
0x44, 0x4F, 0x53, 0x01, 0xE3, 0x3D, 0x0E, 0x72, 0x00, 0x00, 0x03, 0x70, 0x43, 0xFA, 0x00, 0x3E,
0x70, 0x25, 0x4E, 0xAE, 0xFD, 0xD8, 0x4A, 0x80, 0x67, 0x0C, 0x22, 0x40, 0x08, 0xE9, 0x00, 0x06,
0x00, 0x22, 0x4E, 0xAE, 0xFE, 0x62, 0x43, 0xFA, 0x00, 0x18, 0x4E, 0xAE, 0xFF, 0xA0, 0x4A, 0x80,
0x67, 0x0A, 0x20, 0x40, 0x20, 0x68, 0x00, 0x16, 0x70, 0x00, 0x4E, 0x75, 0x70, 0xFF, 0x4E, 0x75,
0x64, 0x6F, 0x73, 0x2E, 0x6C, 0x69, 0x62, 0x72, 0x61, 0x72, 0x79, 0x00, 0x65, 0x78, 0x70, 0x61,
0x6E, 0x73, 0x69, 0x6F, 0x6E, 0x2E, 0x6C, 0x69, 0x62, 0x72, 0x61, 0x72, 0x79, 0x00, 0x00, 0x00,
};
#define FS_OFS_DATABLOCKSIZE 488
#define FS_FLOPPY_BLOCKSIZE 512
#define FS_EXTENSION_BLOCKS 72
#define FS_FLOPPY_TOTALBLOCKS 1760
#define FS_FLOPPY_RESERVED 2
static void writeimageblock (struct zfile *dst, uae_u8 *sector, int offset)
{
zfile_fseek (dst, offset, SEEK_SET);
zfile_fwrite (sector, FS_FLOPPY_BLOCKSIZE, 1, dst);
}
static uae_u32 disk_checksum (uae_u8 *p, uae_u8 *c)
{
uae_u32 cs = 0;
int i;
for (i = 0; i < FS_FLOPPY_BLOCKSIZE; i+= 4)
cs += (p[i] << 24) | (p[i+1] << 16) | (p[i+2] << 8) | (p[i+3] << 0);
cs = (~cs) + 1;
if (c) {
c[0] = cs >> 24; c[1] = cs >> 16; c[2] = cs >> 8; c[3] = cs >> 0;
}
return cs;
}
static int dirhash (const uae_char *name)
{
unsigned long hash;
int i;
hash = strlen (name);
for(i = 0; i < strlen (name); i++) {
hash = hash * 13;
hash = hash + toupper (name[i]);
hash = hash & 0x7ff;
}
hash = hash % ((FS_FLOPPY_BLOCKSIZE / 4) - 56);
return hash;
}
static void disk_date (uae_u8 *p)
{
static int pdays, pmins, pticks;
int days, mins, ticks;
struct timeval tv;
struct mytimeval mtv;
gettimeofday (&tv, NULL);
tv.tv_sec -= _timezone;
mtv.tv_sec = tv.tv_sec;
mtv.tv_usec = tv.tv_usec;
timeval_to_amiga (&mtv, &days, &mins, &ticks, 50);
if (days == pdays && mins == pmins && ticks == pticks) {
ticks++;
if (ticks >= 50 * 60) {
ticks = 0;
mins++;
if (mins >= 24 * 60)
days++;
}
}
pdays = days;
pmins = mins;
pticks = ticks;
p[0] = days >> 24; p[1] = days >> 16; p[2] = days >> 8; p[3] = days >> 0;
p[4] = mins >> 24; p[5] = mins >> 16; p[6] = mins >> 8; p[7] = mins >> 0;
p[8] = ticks >> 24; p[9] = ticks >> 16; p[10] = ticks >> 8; p[11] = ticks >> 0;
}
static void createbootblock (uae_u8 *sector, int bootable, bool ffs)
{
memset (sector, 0, FS_FLOPPY_BLOCKSIZE);
memcpy (sector, "DOS", 3);
if (ffs) {
sector[3] = 1;
}
if (bootable) {
memcpy(sector + 8, bootblock_ofs + 8, sizeof(bootblock_ofs) - 8);
uae_u32 crc = 0;
for (int i = 0; i < FS_FLOPPY_BLOCKSIZE; i += 4) {
uae_u32 v = (sector[i] << 24) | (sector[i + 1] << 16) | (sector[i + 2] << 8) | sector[i + 3];
if (crc + v < crc) {
crc++;
}
crc += v;
}
crc ^= 0xffffffff;
sector[4] = crc >> 24;
sector[5] = crc >> 16;
sector[6] = crc >> 8;
sector[7] = crc >> 0;
}
}
static void createrootblock (uae_u8 *sector, const TCHAR *disk_name)
{
char *dn = ua (disk_name);
if (strlen (dn) >= 30)
dn[30] = 0;
const char *dn2 = dn;
if (dn2[0] == 0)
dn2 = "empty";
memset (sector, 0, FS_FLOPPY_BLOCKSIZE);
sector[0+3] = 2;
sector[12+3] = 0x48;
sector[312] = sector[313] = sector[314] = sector[315] = (uae_u8)0xff;
sector[316+2] = 881 >> 8; sector[316+3] = 881 & 255;
sector[432] = (uae_u8)strlen (dn2);
strcpy ((char*)sector + 433, dn2);
sector[508 + 3] = 1;
disk_date (sector + 420);
memcpy (sector + 472, sector + 420, 3 * 4);
memcpy (sector + 484, sector + 420, 3 * 4);
xfree (dn);
}
static int getblock (uae_u8 *bitmap, int *prev)
{
int i = *prev;
while (bitmap[i] != 0xff) {
if (bitmap[i] == 0) {
bitmap[i] = 1;
*prev = i;
return i;
}
i++;
}
i = 0;
while (bitmap[i] != 0xff) {
if (bitmap[i] == 0) {
bitmap[i] = 1;
*prev = i;
return i;
}
i++;
}
return -1;
}
static void pl (uae_u8 *sector, int offset, uae_u32 v)
{
sector[offset + 0] = v >> 24;
sector[offset + 1] = v >> 16;
sector[offset + 2] = v >> 8;
sector[offset + 3] = v >> 0;
}
static int createdirheaderblock (uae_u8 *sector, int parent, const char *filename, uae_u8 *bitmap, int *prevblock)
{
int block = getblock (bitmap, prevblock);
memset (sector, 0, FS_FLOPPY_BLOCKSIZE);
pl (sector, 0, 2);
pl (sector, 4, block);
disk_date (sector + 512 - 92);
sector[512 - 80] = (uae_u8)strlen (filename);
strcpy ((char*)sector + 512 - 79, filename);
pl (sector, 512 - 12, parent);
pl (sector, 512 - 4, 2);
return block;
}
static int createfileheaderblock (struct zfile *z,uae_u8 *sector, int parent, const char *filename, struct zfile *src, uae_u8 *bitmap, bool ffs, int *prevblock)
{
uae_u8 sector2[FS_FLOPPY_BLOCKSIZE];
uae_u8 sector3[FS_FLOPPY_BLOCKSIZE];
int block = getblock (bitmap, prevblock);
int datablock = getblock (bitmap, prevblock);
int datasec = 1;
int extensions;
int extensionblock, extensioncounter, headerextension = 1;
int size;
int blocksize = ffs ? FS_FLOPPY_BLOCKSIZE : FS_OFS_DATABLOCKSIZE;
zfile_fseek (src, 0, SEEK_END);
size = (int)zfile_ftell (src);
zfile_fseek (src, 0, SEEK_SET);
extensions = (size + blocksize - 1) / blocksize;
memset (sector, 0, FS_FLOPPY_BLOCKSIZE);
pl (sector, 0, 2);
pl (sector, 4, block);
pl (sector, 8, extensions > FS_EXTENSION_BLOCKS ? FS_EXTENSION_BLOCKS : extensions);
pl (sector, 16, datablock);
pl (sector, FS_FLOPPY_BLOCKSIZE - 188, size);
disk_date (sector + FS_FLOPPY_BLOCKSIZE - 92);
sector[FS_FLOPPY_BLOCKSIZE - 80] = (uae_u8)strlen (filename);
strcpy ((char*)sector + FS_FLOPPY_BLOCKSIZE - 79, filename);
pl (sector, FS_FLOPPY_BLOCKSIZE - 12, parent);
pl (sector, FS_FLOPPY_BLOCKSIZE - 4, -3);
extensioncounter = 0;
extensionblock = 0;
while (size > 0) {
int datablock2 = datablock;
int extensionblock2 = extensionblock;
if (extensioncounter == FS_EXTENSION_BLOCKS) {
extensioncounter = 0;
extensionblock = getblock (bitmap, prevblock);
if (datasec > FS_EXTENSION_BLOCKS + 1) {
pl (sector3, 8, FS_EXTENSION_BLOCKS);
pl (sector3, FS_FLOPPY_BLOCKSIZE - 8, extensionblock);
pl (sector3, 4, extensionblock2);
disk_checksum(sector3, sector3 + 20);
writeimageblock (z, sector3, extensionblock2 * FS_FLOPPY_BLOCKSIZE);
} else {
pl (sector, 512 - 8, extensionblock);
}
memset (sector3, 0, FS_FLOPPY_BLOCKSIZE);
pl (sector3, 0, 16);
pl (sector3, FS_FLOPPY_BLOCKSIZE - 12, block);
pl (sector3, FS_FLOPPY_BLOCKSIZE - 4, -3);
}
memset (sector2, 0, FS_FLOPPY_BLOCKSIZE);
if (!ffs) {
pl(sector2, 0, 8);
pl(sector2, 4, block);
pl(sector2, 8, datasec);
pl(sector2, 12, size > FS_OFS_DATABLOCKSIZE ? FS_OFS_DATABLOCKSIZE : size);
zfile_fread(sector2 + 24, size > FS_OFS_DATABLOCKSIZE ? FS_OFS_DATABLOCKSIZE : size, 1, src);
} else {
zfile_fread(sector2, size > FS_FLOPPY_BLOCKSIZE ? FS_FLOPPY_BLOCKSIZE : size, 1, src);
}
datasec++;
size -= blocksize;
datablock = 0;
if (size > 0) {
datablock = getblock(bitmap, prevblock);
}
if (!ffs) {
pl(sector2, 16, datablock);
disk_checksum(sector2, sector2 + 20);
}
writeimageblock (z, sector2, datablock2 * FS_FLOPPY_BLOCKSIZE);
if (datasec <= FS_EXTENSION_BLOCKS + 1)
pl (sector, 512 - 204 - extensioncounter * 4, datablock2);
else
pl (sector3, 512 - 204 - extensioncounter * 4, datablock2);
extensioncounter++;
}
if (datasec > FS_EXTENSION_BLOCKS) {
pl (sector3, 8, extensioncounter);
disk_checksum(sector3, sector3 + 20);
writeimageblock (z, sector3, extensionblock * FS_FLOPPY_BLOCKSIZE);
}
disk_checksum(sector, sector + 20);
writeimageblock (z, sector, block * FS_FLOPPY_BLOCKSIZE);
return block;
}
static void createbitmapblock (uae_u8 *sector, uae_u8 *bitmap)
{
int i, j;
memset (sector, 0, FS_FLOPPY_BLOCKSIZE);
i = 0;
for (;;) {
uae_u32 mask = 0;
for (j = 0; j < 32; j++) {
if (bitmap[2 + i * 32 + j] == 0xff)
break;
if (!bitmap[2 + i * 32 + j])
mask |= 1 << j;
}
sector[4 + i * 4 + 0] = mask >> 24;
sector[4 + i * 4 + 1] = mask >> 16;
sector[4 + i * 4 + 2] = mask >> 8;
sector[4 + i * 4 + 3] = mask >> 0;
if (bitmap[2 + i * 32 + j] == 0xff)
break;
i++;
}
disk_checksum(sector, sector + 0);
}
static int createimagefromexe(struct zfile *src, struct zfile *dst, int hd, bool ffs)
{
uae_u8 sector1[FS_FLOPPY_BLOCKSIZE], sector2[FS_FLOPPY_BLOCKSIZE];
uae_u8 bitmap[FS_FLOPPY_TOTALBLOCKS * 2 + 8];
int exesize;
int blocksize = ffs ? FS_FLOPPY_BLOCKSIZE : FS_OFS_DATABLOCKSIZE;
int blocks, extensionblocks;
int totalblocks;
int fblock1, dblock1;
const char *fname1 = "runme.exe";
const TCHAR *fname1b = _T("runme.adf");
const char *fname2 = "startup-sequence";
const char *dirname1 = "s";
struct zfile *ss;
int prevblock;
memset (bitmap, 0, sizeof bitmap);
zfile_fseek (src, 0, SEEK_END);
exesize = (int)zfile_ftell (src);
blocks = (exesize + blocksize - 1) / blocksize;
extensionblocks = (blocks + FS_EXTENSION_BLOCKS - 1) / FS_EXTENSION_BLOCKS;
/* bootblock=2, root=1, bitmap=1, startup-sequence=1+1, exefileheader=1 */
totalblocks = 2 + 1 + 1 + 2 + 1 + blocks + extensionblocks;
if (totalblocks > FS_FLOPPY_TOTALBLOCKS * hd)
return 0;
bitmap[880 * hd + 0] = 1;
bitmap[880 * hd + 1] = 1;
bitmap[0] = 1;
bitmap[1] = 1;
bitmap[1760 * hd] = -1;
prevblock = 880 * hd;
dblock1 = createdirheaderblock (sector2, 880 * hd, dirname1, bitmap, &prevblock);
ss = zfile_fopen_empty (src, fname1b, strlen (fname1));
zfile_fwrite (fname1, strlen(fname1), 1, ss);
fblock1 = createfileheaderblock (dst, sector1, dblock1, fname2, ss, bitmap, ffs, &prevblock);
zfile_fclose (ss);
pl (sector2, 24 + dirhash (fname2) * 4, fblock1);
disk_checksum(sector2, sector2 + 20);
writeimageblock (dst, sector2, dblock1 * FS_FLOPPY_BLOCKSIZE);
fblock1 = createfileheaderblock (dst, sector1, 880 * hd, fname1, src, bitmap, ffs, &prevblock);
createrootblock (sector1, zfile_getfilename (src));
pl (sector1, 24 + dirhash (fname1) * 4, fblock1);
pl (sector1, 24 + dirhash (dirname1) * 4, dblock1);
disk_checksum(sector1, sector1 + 20);
writeimageblock (dst, sector1, 880 * hd * FS_FLOPPY_BLOCKSIZE);
createbitmapblock (sector1, bitmap);
writeimageblock (dst, sector1, (880 * hd + 1) * FS_FLOPPY_BLOCKSIZE);
createbootblock (sector1, 1, ffs);
writeimageblock (dst, sector1, 0 * FS_FLOPPY_BLOCKSIZE);
return 1;
}
#ifdef FLOPPYBRIDGE
static FloppyBridgeAPI *bridges[4];
static int bridge_type[4];
static const FloppyDiskBridge::BridgeDriver *bridge_driver[4];
static FloppyBridgeAPI::BridgeInformation bridgeinfo;
static int bridgeinfoloaded;
static std::vector<FloppyBridgeAPI::DriverInformation> bridgedriverinfo;
static void floppybridge_read_track(drive *drv);
bool floppybridge_available;
std::vector<FloppyBridgeAPI::FloppyBridgeProfileInformation> bridgeprofiles;
static char *floppybridge_config = NULL;
bool DISK_isfloppybridge(struct uae_prefs *p, int num)
{
return p->floppyslots[num].dfxtype == DRV_FB;
}
#endif
static bool isfloppysound (drive *drv)
{
return drv->useturbo == 0;
}
static int get_floppy_speed (void)
{
int m = currprefs.floppy_speed;
if (m <= 10)
m = 100;
m = NORMAL_FLOPPY_SPEED * 100 / m;
return m;
}
static int get_floppy_speed_from_image(drive *drv)
{
int l, m;
#ifdef FLOPPYBRIDGE
if (drv->bridge) {
drv->fourms = drv->bridge->getBitSpeed() == 4;
m = NORMAL_FLOPPY_SPEED;
if (drv->fourms) {
m *= 2;
}
return m;
}
#endif
m = get_floppy_speed();
l = drv->tracklen;
drv->fourms = false;
if (!drv->tracktiming[0]) {
m = m * l / (2 * 8 * FLOPPY_WRITE_LEN * drv->ddhd);
}
// 4us track?
if (l < (FLOPPY_WRITE_LEN_PAL * 8) * 4 / 6) {
m *= 2;
drv->fourms = true;
}
if (m <= 0) {
m = 1;
}
return m;
}
static const TCHAR *drive_id_name(drive *drv)
{
switch(drv->drive_id)
{
case DRIVE_ID_35HD : return _T("3.5HD");
case DRIVE_ID_525SD: return _T("5.25SD");
case DRIVE_ID_35DD : return _T("3.5DD");
case DRIVE_ID_NONE : return _T("NONE");
}
return _T("UNKNOWN");
}
/* Simulate exact behaviour of an A3000T 3.5 HD disk drive.
* The drive reports to be a 3.5 DD drive whenever there is no
* disk or a 3.5 DD disk is inserted. Only 3.5 HD drive id is reported
* when a real 3.5 HD disk is inserted. -Adil
*/
static void drive_settype_id (drive *drv)
{
int drvnum = drv - &floppy[0];
int t = currprefs.floppyslots[drvnum].dfxtype;
#ifdef FLOPPYBRIDGE
if (drv->bridge)
{
if (drv->bridge->isDiskInDrive()) {
switch (drv->bridge->getDriveTypeID()) {
case FloppyDiskBridge::DriveTypeID::dti35DD:
drv->drive_id = DRIVE_ID_35DD;
break;
case FloppyDiskBridge::DriveTypeID::dti35HD:
drv->drive_id = DRIVE_ID_35HD;
break;
case FloppyDiskBridge::DriveTypeID::dti5255SD:
drv->drive_id = DRIVE_ID_525SD;
break;
}
} else {
drv->drive_id = DRIVE_ID_35DD;
}
drv->ddhd = drv->drive_id == DRIVE_ID_35HD ? 2 : 1;
return;
}
#endif
switch (t)
{
case DRV_35_HD:
#ifdef FLOPPY_DRIVE_HD
if (!drv->diskfile || drv->ddhd <= 1)
drv->drive_id = DRIVE_ID_35DD;
else
drv->drive_id = DRIVE_ID_35HD;
#else
drv->drive_id = DRIVE_ID_35DD;
#endif
break;
case DRV_35_DD_ESCOM:
case DRV_35_DD:
case DRV_525_DD:
default:
drv->drive_id = DRIVE_ID_35DD;
break;
case DRV_525_SD:
drv->drive_id = DRIVE_ID_525SD;
break;
case DRV_NONE:
case DRV_PC_525_ONLY_40:
case DRV_PC_525_40_80:
case DRV_PC_35_ONLY_80:
drv->drive_id = DRIVE_ID_NONE;
break;
}
#ifdef DEBUG_DRIVE_ID
write_log (_T("drive_settype_id: DF%d: set to %s\n"), drv-floppy, drive_id_name(drv));
#endif
}
static void drive_image_free (drive *drv)
{
switch (drv->filetype)
{
case ADF_IPF:
#ifdef CAPS
caps_unloadimage (drv - floppy);
#endif
break;
case ADF_SCP:
#ifdef SCP
scp_close (drv - floppy);
#endif
break;
case ADF_FDI:
#ifdef FDI2RAW
fdi2raw_header_free (drv->fdi);
drv->fdi = 0;
#endif
break;
}
drv->filetype = ADF_NONE;
zfile_fclose(drv->diskfile);
drv->diskfile = NULL;
zfile_fclose(drv->writediskfile);
drv->writediskfile = NULL;
zfile_fclose(drv->pcdecodedfile);
drv->pcdecodedfile = NULL;
}
static int drive_insert (drive * drv, struct uae_prefs *p, int dnum, const TCHAR *fname, bool fake, bool writeprotected);
static void reset_drive_gui (int num)
{
struct gui_info_drive *gid = &gui_data.drives[num];
gid->drive_disabled = 0;
gid->df[0] = 0;
gid->crc32 = 0;
if (currprefs.floppyslots[num].dfxtype < 0)
gid->drive_disabled = 1;
}
static void setamax (void)
{
#ifdef AMAX
amax_enabled = false;
if (is_device_rom(&currprefs, ROMTYPE_AMAX, 0) > 0) {
/* Put A-Max as last drive in drive chain */
int j;
amax_enabled = true;
for (j = 0; j < MAX_FLOPPY_DRIVES; j++)
if (floppy[j].amax)
return;
for (j = 0; j < MAX_FLOPPY_DRIVES; j++) {
if ((1 << j) & disabled) {
floppy[j].amax = 1;
write_log (_T("AMAX: drive %d\n"), j);
return;
}
}
}
#endif
}
static bool ispcbridgedrive(int num)
{
int type = currprefs.floppyslots[num].dfxtype;
return type == DRV_PC_525_ONLY_40 || type == DRV_PC_35_ONLY_80 || type == DRV_PC_525_40_80;
}
static bool drive_writeprotected(drive *drv)
{
#ifdef FLOPPYBRIDGE
if (drv->bridge) {
bool v = drv->bridge->isWriteProtected();
return v;
}
#endif
#ifdef CATWEASEL
if (drv->catweasel)
return 1;
#endif
return currprefs.floppy_read_only || drv->wrprot || drv->forcedwrprot || drv->diskfile == NULL;
}
static void reset_drive (int num)
{
drive *drv = &floppy[num];
drv->amax = 0;
drive_image_free (drv);
drv->motoroff = 1;
drv->idbit = 0;
drv->drive_id = 0;
drv->drive_id_scnt = 0;
drv->lastdataacesstrack = -1;
disabled &= ~(1 << num);
reserved &= ~(1 << num);
if (currprefs.floppyslots[num].dfxtype < 0 || ispcbridgedrive(num))
disabled |= 1 << num;
if (ispcbridgedrive(num))
reserved |= 1 << num;
reset_drive_gui (num);
/* most internal Amiga floppy drives won't enable
* diskready until motor is running at full speed
* and next indexsync has been passed
*/
drv->indexhackmode = 0;
if (num == 0 && currprefs.floppyslots[num].dfxtype == 0)
drv->indexhackmode = 1;
drv->dskchange_time = 0;
drv->dskchange = false;
drv->dskready_down_time = 0;
drv->dskready_up_time = 0;
drv->buffered_cyl = -1;
drv->buffered_side = -1;
gui_led (num + LED_DF0, 0, -1);
drive_settype_id (drv);
_tcscpy (currprefs.floppyslots[num].df, changed_prefs.floppyslots[num].df);
drv->newname[0] = 0;
drv->newnamewriteprotected = false;
#ifdef FLOPPYBRIDGE
if (drv->bridge) {
drv->bridge->resetDrive(drv->cyl);
drv->indexhackmode = 0;
drv->num_tracks = drv->bridge->getMaxCylinder() * 2;
drv->filetype = ADF_FLOPPYBRIDGE;
drv->tracklen = drv->bridge->maxMFMBitPosition();
drv->ddhd = drv->bridge->getDriveTypeID() == FloppyDiskBridge::DriveTypeID::dti35HD ? 2 : 1;
}
#endif
if (!drive_insert (drv, &currprefs, num, currprefs.floppyslots[num].df, false, false))
disk_eject (num);
}
/* code for track display */
static void update_drive_gui (int num, bool force)
{
drive *drv = floppy + num;
bool writ = dskdmaen == DSKDMA_WRITE && drv->state && !((selected | disabled) & (1 << num));
struct gui_info_drive *gid = &gui_data.drives[num];
if (!force && drv->state == gid->drive_motor
&& drv->cyl == gid->drive_track
&& side == gui_data.drive_side
&& drv->crc32 == gid->crc32
&& writ == gid->drive_writing
&& drive_writeprotected(drv) == gid->floppy_protected
&& !_tcscmp (gid->df, currprefs.floppyslots[num].df))
return;
_tcscpy (gid->df, currprefs.floppyslots[num].df);
gid->crc32 = drv->crc32;
gid->drive_motor = drv->state;
gid->drive_track = drv->cyl;
if (reserved & (1 << num))
gui_data.drive_side = reserved_side;
else
gui_data.drive_side = side;
gid->drive_writing = writ;
gid->floppy_protected = drive_writeprotected(drv);
gid->floppy_inserted = gid->df[0] || (drv->bridge && !drv->bridge->hasDiskChanged());
gui_led (num + LED_DF0, (gid->drive_motor ? 1 : 0) | (gid->drive_writing ? 2 : 0), -1);
}
static void drive_fill_bigbuf (drive * drv,int);
void DISK_get_path_text(struct uae_prefs *p, int n, TCHAR *text)
{
_tcscpy(text, p->floppyslots[n].df);
#ifdef FLOPPYBRIDGE
if (DISK_isfloppybridge(p, n) && floppybridge_available) {
if (!bridgeinfoloaded) {
FloppyBridgeAPI::getBridgeDriverInformation(false, bridgeinfo);
bridgeinfoloaded = 1;
}
_tcscpy(text, bridgeinfo.about);
floppybridge_init(p);
if (bridge_driver[n]) {
_tcscat(text, _T(", "));
TCHAR *name = au(bridge_driver[n]->name);
TCHAR *man = au(bridge_driver[n]->manufacturer);
_tcscat(text, name);
_tcscat(text, _T(", "));
_tcscat(text, man);
xfree(man);
xfree(name);
}
}
#endif
}
int DISK_validate_filename (struct uae_prefs *p, const TCHAR *fname_in, int num, TCHAR *outfname, int leave_open, bool *wrprot, uae_u32 *crc32, struct zfile **zf)
{
TCHAR outname[MAX_DPATH];
if (zf)
*zf = NULL;
if (crc32)
*crc32 = 0;
if (wrprot)
*wrprot = p->floppy_read_only ? 1 : 0;
if (outfname)
outfname[0] = 0;
#ifdef FLOPPYBRIDGE
if (DISK_isfloppybridge(p, num)) {
return 1;
}
#endif
cfgfile_resolve_path_out_load(fname_in, outname, MAX_DPATH, PATH_FLOPPY);
if (outfname)
_tcscpy(outfname, outname);
if (leave_open || !zf) {
struct zfile *f = zfile_fopen (outname, _T("r+b"), ZFD_NORMAL | ZFD_DISKHISTORY);
if (!f) {
if (wrprot)
*wrprot = 1;
f = zfile_fopen (outname, _T("rb"), ZFD_NORMAL | ZFD_DISKHISTORY);
}
if (f && crc32)
*crc32 = zfile_crc32 (f);
if (!zf)
zfile_fclose (f);
else
*zf = f;
return f ? 1 : 0;
} else {
if (zfile_exists (outname)) {
if (wrprot && !p->floppy_read_only)
*wrprot = 0;
if (crc32) {
struct zfile *f = zfile_fopen (outname, _T("rb"), ZFD_NORMAL | ZFD_DISKHISTORY);
if (f)
*crc32 = zfile_crc32 (f);
zfile_fclose (f);
}
return 1;
} else {
if (wrprot)
*wrprot = 1;
return 0;
}
}
}
static void updatemfmpos (drive *drv)
{
if (drv->prevtracklen) {
drv->mfmpos = drv->mfmpos * (drv->tracklen * 1000 / drv->prevtracklen) / 1000;
if (drv->mfmpos >= drv->tracklen)
drv->mfmpos = drv->tracklen - 1;
}
drv->mfmpos %= drv->tracklen;
drv->prevtracklen = drv->tracklen;
}
static void track_reset (drive *drv)
{
drv->tracklen = FLOPPY_WRITE_LEN * drv->ddhd * 2 * 8;
drv->revolutions = 1;
drv->trackspeed = get_floppy_speed ();
drv->buffered_side = -1;
drv->skipoffset = -1;
drv->tracktiming[0] = 0;
memset (drv->bigmfmbuf, 0xaa, FLOPPY_WRITE_LEN * 2 * drv->ddhd);