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author Miodrag Milanovic <mmicko@gmail.com>2015-11-08 12:56:12 +0100
committer Miodrag Milanovic <mmicko@gmail.com>2015-11-08 12:56:12 +0100
commit7c19aac60e12d6f5ea301bdb34d7826a01e0b06f (patch)
treef310d86aa2c6bfc19d115307dedde4eb0cd52dad /src/lib/formats/ap2_dsk.cpp
parenta57b46ae933badd7441ce1644711dbb851e2b504 (diff)
Rename *.c -> *.cpp in our source (nw)
Diffstat (limited to 'src/lib/formats/ap2_dsk.cpp')
-rw-r--r--src/lib/formats/ap2_dsk.cpp1642
1 files changed, 1642 insertions, 0 deletions
diff --git a/src/lib/formats/ap2_dsk.cpp b/src/lib/formats/ap2_dsk.cpp
new file mode 100644
index 00000000000..885332882f9
--- /dev/null
+++ b/src/lib/formats/ap2_dsk.cpp
@@ -0,0 +1,1642 @@
+// license:BSD-3-Clause
+// copyright-holders:Olivier Galibert, R. Belmont
+/*********************************************************************
+
+ ap2_dsk.c
+
+ Apple II disk images
+
+*********************************************************************/
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include "ap2_dsk.h"
+#include "basicdsk.h"
+
+
+#define APPLE2_IMAGE_DO 0
+#define APPLE2_IMAGE_PO 1
+#define APPLE2_IMAGE_NIB 2
+
+
+/* used in for all Apple II images */
+static UINT32 apple2_get_track_size(floppy_image_legacy *floppy, int head, int track);
+static int disk_decode_nib(UINT8 *data, const UINT8 *nibble, int *volume, int *track, int *sector);
+static void disk_encode_nib(UINT8 *nibble, const UINT8 *data, int volume, int track, int sector);
+
+/* used in DOS/ProDOS order images */
+static int apple2_do_translate_sector(floppy_image_legacy *floppy, int sector);
+static int apple2_po_translate_sector(floppy_image_legacy *floppy, int sector);
+static floperr_t apple2_dsk_read_track(floppy_image_legacy *floppy, int head, int track, UINT64 offset, void *buffer, size_t buflen);
+static floperr_t apple2_dsk_write_track(floppy_image_legacy *floppy, int head, int track, UINT64 offset, const void *buffer, size_t buflen);
+
+/* used in nibble order images */
+static floperr_t apple2_nib_read_track(floppy_image_legacy *floppy, int head, int track, UINT64 offset, void *buffer, size_t buflen);
+static floperr_t apple2_nib_write_track(floppy_image_legacy *floppy, int head, int track, UINT64 offset, const void *buffer, size_t buflen);
+static floperr_t apple2_nib_read_sector(floppy_image_legacy *floppy, int head, int track, int sector, void *buffer, size_t buflen);
+static floperr_t apple2_nib_write_sector(floppy_image_legacy *floppy, int head, int track, int sector, const void *buffer, size_t buflen, int ddam);
+static floperr_t apple2_nib_get_sector_length(floppy_image_legacy *floppy, int head, int track, int sector, UINT32 *sector_length);
+
+
+static const UINT8 translate6[0x40] =
+{
+ 0x96, 0x97, 0x9a, 0x9b, 0x9d, 0x9e, 0x9f, 0xa6,
+ 0xa7, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb2, 0xb3,
+ 0xb4, 0xb5, 0xb6, 0xb7, 0xb9, 0xba, 0xbb, 0xbc,
+ 0xbd, 0xbe, 0xbf, 0xcb, 0xcd, 0xce, 0xcf, 0xd3,
+ 0xd6, 0xd7, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde,
+ 0xdf, 0xe5, 0xe6, 0xe7, 0xe9, 0xea, 0xeb, 0xec,
+ 0xed, 0xee, 0xef, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6,
+ 0xf7, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
+};
+
+
+
+/* -----------------------------------------------------------------------
+ * Utility code
+ * ----------------------------------------------------------------------- */
+
+static const UINT8 *get_untranslate6_map(void)
+{
+ static UINT8 map[256];
+ static int map_inited = 0;
+ UINT8 i;
+
+ if (!map_inited)
+ {
+ memset(map, 0xff, sizeof(map));
+ for (i = 0; i < ARRAY_LENGTH(translate6); i++)
+ map[translate6[i]] = i;
+ map_inited = 1;
+ }
+ return map;
+}
+
+
+
+/* -----------------------------------------------------------------------
+ * Core constructor
+ * ----------------------------------------------------------------------- */
+
+
+static floperr_t apple2_general_construct(floppy_image_legacy *floppy, int floppy_type)
+{
+ floperr_t err;
+ struct basicdsk_geometry geometry;
+ struct FloppyCallbacks *format;
+
+ format = floppy_callbacks(floppy);
+
+ switch(floppy_type) {
+ case APPLE2_IMAGE_DO:
+ case APPLE2_IMAGE_PO:
+ memset(&geometry, 0, sizeof(geometry));
+ geometry.heads = 1;
+ geometry.tracks = APPLE2_TRACK_COUNT;
+ geometry.sectors = APPLE2_SECTOR_COUNT;
+ geometry.sector_length = APPLE2_SECTOR_SIZE;
+ geometry.translate_sector = (floppy_type == APPLE2_IMAGE_DO) ? apple2_do_translate_sector : apple2_po_translate_sector;
+
+ err = basicdsk_construct(floppy, &geometry);
+ if (err)
+ return err;
+
+ format->read_track = apple2_dsk_read_track;
+ format->write_track = apple2_dsk_write_track;
+ break;
+
+ case APPLE2_IMAGE_NIB:
+ format->read_track = apple2_nib_read_track;
+ format->write_track = apple2_nib_write_track;
+ format->read_sector = apple2_nib_read_sector;
+ format->write_sector = apple2_nib_write_sector;
+ format->get_sector_length = apple2_nib_get_sector_length;
+ break;
+
+ default:
+ assert(0);
+ return FLOPPY_ERROR_INTERNAL;
+ }
+
+ format->get_track_size = apple2_get_track_size;
+
+ return FLOPPY_ERROR_SUCCESS;
+}
+
+
+
+/* -----------------------------------------------------------------------
+ * DOS order and ProDOS order code
+ * ----------------------------------------------------------------------- */
+
+static FLOPPY_IDENTIFY(apple2_dsk_identify)
+{
+ UINT64 size;
+ UINT64 expected_size;
+
+ size = floppy_image_size(floppy);
+ expected_size = APPLE2_TRACK_COUNT * APPLE2_SECTOR_COUNT * APPLE2_SECTOR_SIZE;
+
+ if (size == expected_size)
+ *vote = 100;
+ else if ((size > expected_size) && ((size - expected_size) < 8))
+ *vote = 90; /* tolerate images with up to eight fewer/extra bytes (bug #638) */
+ else if ((size < expected_size) && ((expected_size - size) < 8))
+ *vote = 90; /* tolerate images with up to eight fewer/extra bytes (bug #638) */
+ else
+ *vote = 0;
+ return FLOPPY_ERROR_SUCCESS;
+}
+
+
+
+static int apple2_do_translate_sector(floppy_image_legacy *floppy, int sector)
+{
+ static const UINT8 skewing[] =
+ {
+ /* DOS order (*.do) */
+ 0x00, 0x07, 0x0E, 0x06, 0x0D, 0x05, 0x0C, 0x04,
+ 0x0B, 0x03, 0x0A, 0x02, 0x09, 0x01, 0x08, 0x0F
+ };
+ return skewing[sector];
+}
+
+
+
+static int apple2_po_translate_sector(floppy_image_legacy *floppy, int sector)
+{
+ static const UINT8 skewing[] =
+ {
+ /* ProDOS order (*.po) */
+ 0x00, 0x08, 0x01, 0x09, 0x02, 0x0A, 0x03, 0x0B,
+ 0x04, 0x0C, 0x05, 0x0D, 0x06, 0x0E, 0x07, 0x0F
+ };
+ return skewing[sector];
+}
+
+
+
+static FLOPPY_CONSTRUCT(apple2_do_construct)
+{
+ return apple2_general_construct(floppy, APPLE2_IMAGE_DO);
+}
+
+
+
+static FLOPPY_CONSTRUCT(apple2_po_construct)
+{
+ return apple2_general_construct(floppy, APPLE2_IMAGE_PO);
+}
+
+
+
+static floperr_t apple2_dsk_read_track(floppy_image_legacy *floppy, int head, int track, UINT64 offset, void *buffer, size_t buflen)
+{
+ UINT8 sector_buffer[APPLE2_SECTOR_SIZE];
+ int sector;
+ UINT8 *nibble;
+
+ if (buflen < APPLE2_NIBBLE_SIZE*APPLE2_SECTOR_COUNT)
+ return FLOPPY_ERROR_INTERNAL;
+ if (offset != 0)
+ return FLOPPY_ERROR_UNSUPPORTED;
+
+ memset(buffer, 0, buflen);
+
+ for (sector = 0; sector < APPLE2_SECTOR_COUNT; sector++)
+ {
+ nibble = (UINT8 *)buffer;
+ nibble += sector * APPLE2_SMALL_NIBBLE_SIZE;
+
+ floppy_read_sector(floppy, head, track, sector, 0, sector_buffer, sizeof(sector_buffer));
+ disk_encode_nib(nibble, sector_buffer, 254, track, sector);
+ }
+ return FLOPPY_ERROR_SUCCESS;
+}
+
+
+
+static floperr_t apple2_dsk_write_track(floppy_image_legacy *floppy, int head, int track, UINT64 offset, const void *buffer, size_t buflen)
+{
+ int sector;
+ UINT8 sector_buffer[APPLE2_SECTOR_SIZE];
+ const UINT8 *nibble;
+
+ if (offset != 0)
+ return FLOPPY_ERROR_UNSUPPORTED;
+
+ for (sector = 0; sector < APPLE2_SECTOR_COUNT; sector++)
+ {
+ nibble = (UINT8 *)buffer;
+ nibble += sector * APPLE2_SMALL_NIBBLE_SIZE;
+
+ disk_decode_nib(sector_buffer, nibble, NULL, NULL, NULL);
+ floppy_write_sector(floppy, head, track, sector, 0, sector_buffer, sizeof(sector_buffer), 0);
+ }
+
+ return FLOPPY_ERROR_SUCCESS;
+}
+
+
+
+/* -----------------------------------------------------------------------
+ * Nibble order code
+ * ----------------------------------------------------------------------- */
+
+static FLOPPY_IDENTIFY(apple2_nib_identify)
+{
+ UINT64 size;
+ size = floppy_image_size(floppy);
+ *vote = (size == APPLE2_TRACK_COUNT * APPLE2_SECTOR_COUNT * APPLE2_NIBBLE_SIZE) ? 100 : 0;
+ return FLOPPY_ERROR_SUCCESS;
+}
+
+
+
+static FLOPPY_CONSTRUCT(apple2_nib_construct)
+{
+ return apple2_general_construct(floppy, APPLE2_IMAGE_NIB);
+}
+
+
+
+static floperr_t apple2_nib_read_track(floppy_image_legacy *floppy, int head, int track, UINT64 offset, void *buffer, size_t buflen)
+{
+ if ((head != 0) || (track < 0) || (track >= APPLE2_TRACK_COUNT))
+ return FLOPPY_ERROR_SEEKERROR;
+ if (offset != 0)
+ return FLOPPY_ERROR_UNSUPPORTED;
+ floppy_image_read(floppy, buffer, track * APPLE2_NIBBLE_SIZE * APPLE2_SECTOR_COUNT, buflen);
+ return FLOPPY_ERROR_SUCCESS;
+}
+
+
+
+static floperr_t apple2_nib_write_track(floppy_image_legacy *floppy, int head, int track, UINT64 offset, const void *buffer, size_t buflen)
+{
+ if ((head != 0) || (track < 0) || (track >= APPLE2_TRACK_COUNT))
+ return FLOPPY_ERROR_SEEKERROR;
+ if (offset != 0)
+ return FLOPPY_ERROR_UNSUPPORTED;
+ floppy_image_write(floppy, buffer, track * APPLE2_NIBBLE_SIZE * APPLE2_SECTOR_COUNT, buflen);
+ return FLOPPY_ERROR_SUCCESS;
+}
+
+
+
+/* -----------------------------------------------------------------------
+ * Track conversion
+ * ----------------------------------------------------------------------- */
+
+static int decode_nibbyte(UINT8 *nibint, const UINT8 *nibdata)
+{
+ if ((nibdata[0] & 0xAA) != 0xAA)
+ return 1;
+ if ((nibdata[1] & 0xAA) != 0xAA)
+ return 1;
+
+ *nibint = (nibdata[0] & ~0xAA) << 1;
+ *nibint |= (nibdata[1] & ~0xAA) << 0;
+ return 0;
+}
+
+
+
+static int disk_decode_nib(UINT8 *data, const UINT8 *nibble, int *volume, int *track, int *sector)
+{
+ UINT8 read_volume;
+ UINT8 read_track;
+ UINT8 read_sector;
+ UINT8 read_checksum;
+ int i;
+ UINT8 b, xorvalue, newvalue;
+
+ const UINT8 *untranslate6 = get_untranslate6_map();
+
+ /* pick apart the volume/track/sector info and checksum */
+ if (decode_nibbyte(&read_volume, &nibble[10]))
+ return 1;
+ if (decode_nibbyte(&read_track, &nibble[12]))
+ return 1;
+ if (decode_nibbyte(&read_sector, &nibble[14]))
+ return 1;
+ if (decode_nibbyte(&read_checksum, &nibble[16]))
+ return 1;
+ if (read_checksum != (read_volume ^ read_track ^ read_sector))
+ return 1;
+
+ /* decode the nibble core */
+ xorvalue = 0;
+ for (i = 0; i < 342; i++)
+ {
+ b = untranslate6[nibble[i+28]];
+ if (b == 0xff)
+ return 1;
+ newvalue = b ^ xorvalue;
+
+ if (i >= 0x56)
+ {
+ /* 6 bit */
+ data[i - 0x56] |= (newvalue << 2);
+ }
+ else
+ {
+ /* 3 * 2 bit */
+ data[i + 0x00] = ((newvalue >> 1) & 0x01) | ((newvalue << 1) & 0x02);
+ data[i + 0x56] = ((newvalue >> 3) & 0x01) | ((newvalue >> 1) & 0x02);
+ if (i + 0xAC < APPLE2_SECTOR_SIZE)
+ data[i + 0xAC] = ((newvalue >> 5) & 0x01) | ((newvalue >> 3) & 0x02);
+ }
+ xorvalue = newvalue;
+ }
+
+ /* success; write out values if pointers not null */
+ if (volume)
+ *volume = read_volume;
+ if (track)
+ *track = read_track;
+ if (sector)
+ *sector = read_sector;
+ return 0;
+}
+
+
+
+static floperr_t apple2_nib_read_sector(floppy_image_legacy *floppy, int head, int track, int sector, void *buffer, size_t buflen)
+{
+ floperr_t err;
+ const UINT8 *nibble;
+ UINT8 *track_data;
+ void *track_data_v;
+
+ if ((sector < 0) || (sector >= APPLE2_SECTOR_COUNT))
+ return FLOPPY_ERROR_SEEKERROR;
+ if (buflen != APPLE2_SECTOR_SIZE)
+ return FLOPPY_ERROR_INTERNAL;
+
+ err = floppy_load_track(floppy, head, track, FALSE, &track_data_v, NULL);
+ if (err)
+ return err;
+ track_data = (UINT8 *) track_data_v;
+
+ nibble = track_data + (sector * APPLE2_NIBBLE_SIZE);
+
+ if (disk_decode_nib((UINT8 *)buffer, nibble, NULL, NULL, NULL))
+ return FLOPPY_ERROR_INVALIDIMAGE;
+
+ return FLOPPY_ERROR_SUCCESS;
+}
+
+
+
+static void disk_encode_nib(UINT8 *nibble, const UINT8 *data, int volume, int track, int sector)
+{
+ int checksum, oldvalue, xorvalue, i;
+
+ /* setup header values */
+ checksum = volume ^ track ^ sector;
+
+ memset(nibble, 0xFF, APPLE2_NIBBLE_SIZE);
+ nibble[ 7] = 0xD5;
+ nibble[ 8] = 0xAA;
+ nibble[ 9] = 0x96;
+ nibble[10] = (volume >> 1) | 0xAA;
+ nibble[11] = volume | 0xAA;
+ nibble[12] = (track >> 1) | 0xAA;
+ nibble[13] = track | 0xAA;
+ nibble[14] = (sector >> 1) | 0xAA;
+ nibble[15] = sector | 0xAA;
+ nibble[16] = (checksum >> 1) | 0xAA;
+ nibble[17] = (checksum) | 0xAA;
+ nibble[18] = 0xDE;
+ nibble[19] = 0xAA;
+ nibble[20] = 0xEB;
+ nibble[25] = 0xD5;
+ nibble[26] = 0xAA;
+ nibble[27] = 0xAD;
+ nibble[27+344] = 0xDE;
+ nibble[27+345] = 0xAA;
+ nibble[27+346] = 0xEB;
+ xorvalue = 0;
+
+ for (i = 0; i < 342; i++)
+ {
+ if (i >= 0x56)
+ {
+ /* 6 bit */
+ oldvalue = data[i - 0x56];
+ oldvalue = oldvalue >> 2;
+ }
+ else
+ {
+ /* 3 * 2 bit */
+ oldvalue = 0;
+ oldvalue |= (data[i + 0x00] & 0x01) << 1;
+ oldvalue |= (data[i + 0x00] & 0x02) >> 1;
+ oldvalue |= (data[i + 0x56] & 0x01) << 3;
+ oldvalue |= (data[i + 0x56] & 0x02) << 1;
+ if (i + 0xAC < APPLE2_SECTOR_SIZE)
+ {
+ oldvalue |= (data[i + 0xAC] & 0x01) << 5;
+ oldvalue |= (data[i + 0xAC] & 0x02) << 3;
+ }
+
+ }
+ xorvalue ^= oldvalue;
+ nibble[28+i] = translate6[xorvalue & 0x3F];
+ xorvalue = oldvalue;
+ }
+
+ nibble[27+343] = translate6[xorvalue & 0x3F];
+}
+
+
+
+static floperr_t apple2_nib_write_sector(floppy_image_legacy *floppy, int head, int track, int sector, const void *buffer, size_t buflen, int ddam)
+{
+ floperr_t err;
+ UINT8 *track_data;
+ void *track_data_v;
+
+ if ((sector < 0) || (sector >= APPLE2_SECTOR_COUNT))
+ return FLOPPY_ERROR_SEEKERROR;
+ if (buflen != APPLE2_SECTOR_SIZE)
+ return FLOPPY_ERROR_INTERNAL;
+
+ err = floppy_load_track(floppy, head, track, TRUE, &track_data_v, NULL);
+ if (err)
+ return err;
+ track_data = (UINT8 *) track_data_v;
+
+ disk_encode_nib(track_data + sector * APPLE2_NIBBLE_SIZE, (const UINT8 *)buffer, 254, track, sector);
+ return FLOPPY_ERROR_SUCCESS;
+}
+
+
+
+static floperr_t apple2_nib_get_sector_length(floppy_image_legacy *floppy, int head, int track, int sector, UINT32 *sector_length)
+{
+ *sector_length = APPLE2_SECTOR_SIZE;
+ return FLOPPY_ERROR_SUCCESS;
+}
+
+
+
+static UINT32 apple2_get_track_size(floppy_image_legacy *floppy, int head, int track)
+{
+ return APPLE2_NIBBLE_SIZE * APPLE2_SECTOR_COUNT;
+}
+
+
+
+/* ----------------------------------------------------------------------- */
+
+LEGACY_FLOPPY_OPTIONS_START( apple2 )
+ LEGACY_FLOPPY_OPTION( apple2_do, "do,dsk,bin", "Apple ][ DOS order disk image", apple2_dsk_identify, apple2_do_construct, NULL,
+ HEADS([1])
+ TRACKS([35])
+ SECTORS([16])
+ SECTOR_LENGTH([256])
+ FIRST_SECTOR_ID([0]))
+ LEGACY_FLOPPY_OPTION( apple2_po, "po,dsk,bin", "Apple ][ ProDOS order disk image", apple2_dsk_identify, apple2_po_construct, NULL,
+ HEADS([1])
+ TRACKS([35])
+ SECTORS([16])
+ SECTOR_LENGTH([256])
+ FIRST_SECTOR_ID([0]))
+ LEGACY_FLOPPY_OPTION( apple2_nib, "dsk,nib", "Apple ][ Nibble order disk image", apple2_nib_identify, apple2_nib_construct, NULL,
+ HEADS([1])
+ TRACKS([35])
+ SECTORS([16])
+ SECTOR_LENGTH([256])
+ FIRST_SECTOR_ID([0]))
+LEGACY_FLOPPY_OPTIONS_END
+
+// license:BSD-3-Clause
+// copyright-holders:Olivier Galibert
+/***************************************************************************
+
+ New implementation
+
+****************************************************************************/
+
+static const UINT8 dos_skewing[] =
+{
+ 0x00, 0x07, 0x0E, 0x06, 0x0D, 0x05, 0x0C, 0x04,
+ 0x0B, 0x03, 0x0A, 0x02, 0x09, 0x01, 0x08, 0x0F
+};
+
+static const UINT8 prodos_skewing[] =
+{
+ 0x00, 0x08, 0x01, 0x09, 0x02, 0x0A, 0x03, 0x0B,
+ 0x04, 0x0C, 0x05, 0x0D, 0x06, 0x0E, 0x07, 0x0F
+};
+
+
+a2_16sect_format::a2_16sect_format() : floppy_image_format_t()
+{
+}
+
+const char *a2_16sect_format::name() const
+{
+ return "a2_16sect";
+}
+
+const char *a2_16sect_format::description() const
+{
+ return "Apple II 16-sector dsk image";
+}
+
+const char *a2_16sect_format::extensions() const
+{
+ return "dsk,do,po";
+}
+
+bool a2_16sect_format::supports_save() const
+{
+ return true;
+}
+
+int a2_16sect_format::identify(io_generic *io, UINT32 form_factor)
+{
+ UINT64 size = io_generic_size(io);
+ UINT32 expected_size = 35 * 16 * 256;
+
+ // check standard size plus some oddball sizes in our softlist
+ if ((size == expected_size) || (size == 143403) || (size == 143363) || (size == 143358))
+ {
+ return 50;
+ }
+
+ return 0;
+}
+
+// following is placeholder, is completely wrong.
+const floppy_image_format_t::desc_e a2_16sect_format::mac_gcr[] = {
+ { SECTOR_LOOP_START, 0, -1 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xd5aa96, 24 },
+ { CRC_MACHEAD_START, 0 },
+ { TRACK_ID_GCR6 },
+ { SECTOR_ID_GCR6 },
+ { TRACK_HEAD_ID_GCR6 },
+ { SECTOR_INFO_GCR6 },
+ { CRC_END, 0 },
+ { CRC, 0 },
+ { RAWBITS, 0xdeaaff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xd5aaad, 24 },
+ { SECTOR_ID_GCR6 },
+ { SECTOR_DATA_MAC, -1 },
+ { RAWBITS, 0xdeaaff, 24 },
+ { RAWBITS, 0xff, 8 },
+ { SECTOR_LOOP_END },
+ { END },
+};
+
+bool a2_16sect_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
+{
+ m_prodos_order = false;
+
+ int fpos = 0;
+ for(int track=0; track < 35; track++) {
+ std::vector<UINT32> track_data;
+ UINT8 sector_data[256*16];
+ static const unsigned char pascal_block1[4] = { 0x08, 0xa5, 0x0f, 0x29 };
+ static const unsigned char pascal2_block1[4] = { 0xff, 0xa2, 0x00, 0x8e };
+ static const unsigned char dos33_block1[4] = { 0xa2, 0x02, 0x8e, 0x52 };
+ static const unsigned char sos_block1[4] = { 0xc9, 0x20, 0xf0, 0x3e };
+ static const unsigned char a3a2emul_block1[6] = { 0x8d, 0xd0, 0x03, 0x4c, 0xc7, 0xa4 };
+ static const unsigned char cpm22_block1[8] = { 0xa2, 0x55, 0xa9, 0x00, 0x9d, 0x00, 0x0d, 0xca };
+
+ io_generic_read(io, sector_data, fpos, 256*16);
+
+ if (track == 0 && fpos == 0)
+ {
+ // check ProDOS boot block
+ if (!memcmp("PRODOS", &sector_data[0x103], 6))
+ {
+ m_prodos_order = true;
+ } // check for alternate version ProDOS boot block
+ if (!memcmp("PRODOS", &sector_data[0x121], 6))
+ {
+ m_prodos_order = true;
+ } // check for ProDOS order SOS disk
+ else if (!memcmp(sos_block1, &sector_data[0x100], 4))
+ {
+ m_prodos_order = true;
+ } // check for Apple III A2 emulator disk in ProDOS order
+ else if (!memcmp(a3a2emul_block1, &sector_data[0x100], 6))
+ {
+ m_prodos_order = true;
+ } // check for PCPI Applicard software in ProDOS order
+ else if (!memcmp("COPYRIGHT (C) 1979, DIGITAL RESEARCH", &sector_data[0x118], 36))
+ {
+ m_prodos_order = true;
+ } // check Apple II Pascal
+ else if (!memcmp("SYSTEM.APPLE", &sector_data[0xd7], 12))
+ {
+ // Pascal discs can still be DOS order.
+ // Check for the second half of the boot code at 0x100
+ // (which means ProDOS order)
+ if (!memcmp(pascal_block1, &sector_data[0x100], 4))
+ {
+ m_prodos_order = true;
+ }
+ } // check for DOS 3.3 disks in ProDOS order
+ else if (!memcmp(dos33_block1, &sector_data[0x100], 4))
+ {
+ m_prodos_order = true;
+ } // check for a later version of the Pascal boot block
+ else if (!memcmp(pascal2_block1, &sector_data[0x100], 4))
+ {
+ m_prodos_order = true;
+ } // check for CP/M disks in ProDOS order
+ else if (!memcmp(cpm22_block1, &sector_data[0x100], 8))
+ {
+ m_prodos_order = true;
+ }
+ }
+
+ fpos += 256*16;
+ for(int i=0; i<49; i++)
+ raw_w(track_data, 10, 0x3fc);
+ for(int i=0; i<16; i++) {
+ int sector;
+
+ if (m_prodos_order)
+ {
+ sector = prodos_skewing[i];
+ }
+ else
+ {
+ sector = dos_skewing[i];
+ }
+
+ const UINT8 *sdata = sector_data + 256 * sector;
+ for(int j=0; j<20; j++)
+ raw_w(track_data, 10, 0x3fc);
+ raw_w(track_data, 8, 0xff);
+ raw_w(track_data, 24, 0xd5aa96);
+ raw_w(track_data, 16, gcr4_encode(0xfe));
+ raw_w(track_data, 16, gcr4_encode(track));
+ raw_w(track_data, 16, gcr4_encode(i));
+ raw_w(track_data, 16, gcr4_encode(0xfe ^ track ^ i));
+ raw_w(track_data, 24, 0xdeaaeb);
+
+ for(int j=0; j<4; j++)
+ raw_w(track_data, 10, 0x3fc);
+
+ raw_w(track_data, 9, 0x01fe);
+ raw_w(track_data, 24, 0xd5aaad);
+ raw_w(track_data, 1, 0);
+
+ UINT8 pval = 0x00;
+ for(int i=0; i<342; i++) {
+ UINT8 nval;
+ if(i >= 0x56)
+ nval = sdata[i - 0x56] >> 2;
+ else {
+ nval =
+ ((sdata[i+0x00] & 0x01) << 1) |
+ ((sdata[i+0x00] & 0x02) >> 1) |
+ ((sdata[i+0x56] & 0x01) << 3) |
+ ((sdata[i+0x56] & 0x02) << 1);
+ if(i < 256-0xac)
+ nval |=
+ ((sdata[i+0xac] & 0x01) << 5) |
+ ((sdata[i+0xac] & 0x02) << 3);
+ }
+ raw_w(track_data, 8, translate6[nval ^ pval]);
+ pval = nval;
+ }
+ raw_w(track_data, 8, translate6[pval]);
+ raw_w(track_data, 24, 0xdeaaeb);
+ }
+ raw_w(track_data, 8, 0xff);
+ assert(track_data.size() == 51090);
+
+ generate_track_from_levels(track, 0, track_data, 0, image);
+ }
+ return true;
+}
+
+UINT8 a2_16sect_format::gb(const UINT8 *buf, int ts, int &pos, int &wrap)
+{
+ UINT8 v = 0;
+ int w1 = wrap;
+ while(wrap != w1+2 && !(v & 0x80)) {
+ v = v << 1 | ((buf[pos >> 3] >> (7-(pos & 7))) & 1);
+ pos++;
+ if(pos == ts) {
+ pos = 0;
+ wrap++;
+ }
+ }
+ return v;
+}
+
+void a2_16sect_format::update_chk(const UINT8 *data, int size, UINT32 &chk)
+{
+}
+
+//#define VERBOSE_SAVE
+
+bool a2_16sect_format::save(io_generic *io, floppy_image *image)
+{
+ int g_tracks, g_heads;
+ int visualgrid[16][35]; // visualizer grid, cleared/initialized below
+
+// lenient addr check: if unset, only accept an addr mark if the checksum was good
+// if set, accept an addr mark if the track and sector values are both sane
+#undef LENIENT_ADDR_CHECK
+// if set, use the old, not as robust logic for choosing which copy of a decoded sector to write
+// to the resulting image if the sector has a bad checksum and/or postamble
+#undef USE_OLD_BEST_SECTOR_PRIORITY
+// nothing found
+#define NOTFOUND 0
+// address mark was found
+#define ADDRFOUND 1
+// address checksum is good
+#define ADDRGOOD 2
+// data mark was found (requires addrfound and sane values)
+#define DATAFOUND 4
+// data checksum is good
+#define DATAGOOD 8
+// data postamble is good
+#define DATAPOST 16
+ for (int i = 0; i < 16; i++) {
+ for (int j = 0; j < 35; j++) {
+ visualgrid[i][j] = 0;
+ }
+ }
+ image->get_actual_geometry(g_tracks, g_heads);
+
+ int head = 0;
+
+ int pos_data = 0;
+
+ for(int track=0; track < 35; track++) {
+ UINT8 sectdata[(256)*16];
+ memset(sectdata, 0, sizeof(sectdata));
+ int nsect = 16;
+ UINT8 buf[10000]; // normal is 51090 cells, e.g. 6387 bytes, add 50% and round up for denser than normal disks
+ int ts;
+ #ifdef VERBOSE_SAVE
+ fprintf(stderr,"DEBUG: a2_16sect_format::save() about to generate bitstream from track %d...", track);
+ #endif
+ generate_bitstream_from_track(track, head, 3915, buf, ts, image);
+ #ifdef VERBOSE_SAVE
+ fprintf(stderr,"done.\n");
+ #endif
+ int pos = 0;
+ int wrap = 0;
+ int hb = 0;
+ int dosver = 0; // apple dos version; 0 = >=3.3, 1 = <3.3
+ for(;;) {
+ UINT8 v = gb(buf, ts, pos, wrap);
+ if(v == 0xff) {
+ hb = 1;
+ }
+ else if(hb == 1 && v == 0xd5){
+ hb = 2;
+ }
+ else if(hb == 2 && v == 0xaa) {
+ hb = 3;
+ }
+ else if(hb == 3 && ((v == 0x96) || (v == 0xab))) { // 0x96 = dos 3.3/16sec, 0xab = dos 3.21 and below/13sec
+ hb = 4;
+ if (v == 0xab) dosver = 1;
+ }
+ else
+ hb = 0;
+
+ if(hb == 4) {
+ UINT8 h[11];
+ for(int i=0; i<11; i++)
+ h[i] = gb(buf, ts, pos, wrap);
+ //UINT8 v2 = gcr6bw_tb[h[2]];
+ UINT8 vl = gcr4_decode(h[0],h[1]);
+ UINT8 tr = gcr4_decode(h[2],h[3]);
+ UINT8 se = gcr4_decode(h[4],h[5]);
+ UINT8 chk = gcr4_decode(h[6],h[7]);
+ #ifdef VERBOSE_SAVE
+ UINT32 post = (h[8]<<16)|(h[9]<<8)|h[10];
+ printf("Address Mark:\tVolume %d, Track %d, Sector %2d, Checksum %02X: %s, Postamble %03X: %s\n", vl, tr, se, chk, (chk ^ vl ^ tr ^ se)==0?"OK":"BAD", post, (post&0xFFFF00)==0xDEAA00?"OK":"BAD");
+ #endif
+ // sanity check
+ if (tr == track && se < nsect) {
+ visualgrid[se][track] |= ADDRFOUND;
+ visualgrid[se][track] |= ((chk ^ vl ^ tr ^ se)==0)?ADDRGOOD:0;
+#ifdef LENIENT_ADDR_CHECK
+ if ((visualgrid[se][track] & ADDRFOUND) == ADDRFOUND) {
+#else
+ if ((visualgrid[se][track] & ADDRGOOD) == ADDRGOOD) {
+#endif
+ int opos = pos;
+ int owrap = wrap;
+ hb = 0;
+ for(int i=0; i<20 && hb != 4; i++) {
+ v = gb(buf, ts, pos, wrap);
+ if(v == 0xff)
+ hb = 1;
+ else if(hb == 1 && v == 0xd5)
+ hb = 2;
+ else if(hb == 2 && v == 0xaa)
+ hb = 3;
+ else if(hb == 3 && v == 0xad)
+ hb = 4;
+ else
+ hb = 0;
+ }
+ if((hb == 4)&&(dosver == 0)) {
+ visualgrid[se][track] |= DATAFOUND;
+ UINT8 *dest;
+ UINT8 data[0x157];
+ UINT32 dpost = 0;
+ UINT8 c = 0;
+
+ if (m_prodos_order)
+ {
+ dest = sectdata+(256)*prodos_skewing[se];
+ }
+ else
+ {
+ dest = sectdata+(256)*dos_skewing[se];
+ }
+
+ // first read in sector and decode to 6bit form
+ for(int i=0; i<0x156; i++) {
+ data[i] = gcr6bw_tb[gb(buf, ts, pos, wrap)] ^ c;
+ c = data[i];
+ // printf("%02x ", c);
+ // if (((i&0xf)+1)==0x10) printf("\n");
+ }
+ // read the checksum byte
+ data[0x156] = gcr6bw_tb[gb(buf,ts,pos,wrap)];
+ // now read the postamble bytes
+ for(int i=0; i<3; i++) {
+ dpost <<= 8;
+ dpost |= gb(buf, ts, pos, wrap);
+ }
+ // next combine in the upper 2 bits of each byte
+ UINT8 bit_swap[4] = { 0, 2, 1, 3 };
+ for(int i=0; i<0x56; i++)
+ data[i+0x056] = data[i+0x056]<<2 | bit_swap[data[i]&3];
+ for(int i=0; i<0x56; i++)
+ data[i+0x0ac] = data[i+0x0ac]<<2 | bit_swap[(data[i]>>2)&3];
+ for(int i=0; i<0x54; i++)
+ data[i+0x102] = data[i+0x102]<<2 | bit_swap[(data[i]>>4)&3];
+ // now decode it into 256 bytes
+ // but only write it if the bitfield of the track shows datagood is NOT set.
+ // if it is set we don't want to overwrite a guaranteed good read with a bad one
+ // if past read had a bad checksum or bad postamble...
+#ifndef USE_OLD_BEST_SECTOR_PRIORITY
+ if (((visualgrid[se][track]&DATAGOOD)==0)||((visualgrid[se][track]&DATAPOST)==0)) {
+ // if the current read is good, and postamble is good, write it in, no matter what.
+ // if the current read is good and the current postamble is bad, write it in unless the postamble was good before
+ // if the current read is bad and the current postamble is good and the previous read had neither good, write it in
+ // if the current read isn't good and neither is the postamble but nothing better
+ // has been written before, write it anyway.
+ if ( ((data[0x156] == c) && (dpost&0xFFFF00)==0xDEAA00) ||
+ (((data[0x156] == c) && (dpost&0xFFFF00)!=0xDEAA00) && ((visualgrid[se][track]&DATAPOST)==0)) ||
+ (((data[0x156] != c) && (dpost&0xFFFF00)==0xDEAA00) && (((visualgrid[se][track]&DATAGOOD)==0)&&(visualgrid[se][track]&DATAPOST)==0)) ||
+ (((data[0x156] != c) && (dpost&0xFFFF00)!=0xDEAA00) && (((visualgrid[se][track]&DATAGOOD)==0)&&(visualgrid[se][track]&DATAPOST)==0))
+ ) {
+ for(int i=0x56; i<0x156; i++) {
+ UINT8 dv = data[i];
+ *dest++ = dv;
+ }
+ }
+ }
+#else
+ if ((visualgrid[se][track]&DATAGOOD)==0) {
+ for(int i=0x56; i<0x156; i++) {
+ UINT8 dv = data[i];
+ *dest++ = dv;
+ }
+ }
+#endif
+ // do some checking
+ #ifdef VERBOSE_SAVE
+ if ((data[0x156] != c) || (dpost&0xFFFF00)!=0xDEAA00)
+ fprintf(stderr,"Data Mark:\tChecksum xpctd %d found %d: %s, Postamble %03X: %s\n", data[0x156], c, (data[0x156]==c)?"OK":"BAD", dpost, (dpost&0xFFFF00)==0xDEAA00?"OK":"BAD");
+ #endif
+ if (data[0x156] == c) visualgrid[se][track] |= DATAGOOD;
+ if ((dpost&0xFFFF00)==0xDEAA00) visualgrid[se][track] |= DATAPOST;
+ } else if ((hb == 4)&&(dosver == 1)) {
+ fprintf(stderr,"ERROR: We don't handle dos sectors below 3.3 yet!\n");
+ } else {
+ pos = opos;
+ wrap = owrap;
+ }
+ }
+ }
+ hb = 0;
+ }
+ if(wrap)
+ break;
+ }
+ for(int i=0; i<nsect; i++) {
+ //if(nsect>0) printf("t%d,", track);
+ UINT8 *data = sectdata + (256)*i;
+ io_generic_write(io, data, pos_data, 256);
+ pos_data += 256;
+ }
+ //printf("\n");
+ }
+ // display a little table of which sectors decoded ok
+ #ifdef VERBOSE_SAVE
+ int total_good = 0;
+ for (int j = 0; j < 35; j++) {
+ printf("T%2d: ",j);
+ for (int i = 0; i < 16; i++) {
+ if (visualgrid[i][j] == NOTFOUND) printf("-NF- ");
+ else {
+ if (visualgrid[i][j] & ADDRFOUND) printf("a"); else printf(" ");
+ if (visualgrid[i][j] & ADDRGOOD) printf("A"); else printf(" ");
+ if (visualgrid[i][j] & DATAFOUND) printf("d"); else printf(" ");
+ if (visualgrid[i][j] & DATAGOOD) { printf("D"); total_good++; } else printf(" ");
+ if (visualgrid[i][j] & DATAPOST) printf("."); else printf(" ");
+ }
+ }
+ printf("\n");
+ }
+ printf("Total Good Sectors: %d\n", total_good);
+ #endif
+
+ return true;
+}
+
+const floppy_format_type FLOPPY_A216S_FORMAT = &floppy_image_format_creator<a2_16sect_format>;
+/* RWTS18 format
+ * Developed by Roland Gustafsson (http://www.acts.org/roland/index.html)
+ for Br0derbund Software around 1986
+ This format works as follows:
+ * Track 0, in its entirety, is a normal 16-sector track, nothing special.
+ (some disks may lack a normal sector 0 on this track, more info needed)
+ * Tracks 1 thru 34 are in the special "RWTS18" track format:
+ The format consists of six "large" sectors with 768 bytes each.
+ Each of those large sectors has a title-specific sync byte and contains
+ three "virtual" small sectors of 256 bytes, in an order like follows:
+ BigSector Contains
+ 0: 0, 6, 12
+ 1: 1, 7, 13
+ 2: 2, 8, 14
+ 3: 3, 9, 15
+ 4: 4, 10, 16
+ 5: 5, 11, 17
+ The sector format is: (all gcr6)
+ D5 9D <track> <sector> <checksum> AA FF FF <titlespecific sync> <0x400 nybbles which represent 768 bytes> <data checksum> D6
+ Title-specific sync bytes are:
+ Airheart: D4
+ Toy Shop: A5
+ Carmen USA: unknown (not all released versions used RWTS18)
+ Wings of Fury: 96
+ Prince of Persia: A9
+ And several others.
+*/
+a2_rwts18_format::a2_rwts18_format() : floppy_image_format_t()
+{
+}
+
+const char *a2_rwts18_format::name() const
+{
+ return "a2_rwts18";
+}
+
+const char *a2_rwts18_format::description() const
+{
+ return "Apple II RWTS18-type Image";
+}
+
+const char *a2_rwts18_format::extensions() const
+{
+ return "rti";
+}
+
+bool a2_rwts18_format::supports_save() const
+{
+ return true;
+}
+
+int a2_rwts18_format::identify(io_generic *io, UINT32 form_factor)
+{
+ UINT64 size = io_generic_size(io);
+ UINT32 expected_size = 35 * 16 * 256;
+ return size == expected_size;
+}
+
+// following is placeholder, is completely wrong.
+const floppy_image_format_t::desc_e a2_rwts18_format::mac_gcr[] = {
+ { SECTOR_LOOP_START, 0, -1 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xd5aa96, 24 },
+ { CRC_MACHEAD_START, 0 },
+ { TRACK_ID_GCR6 },
+ { SECTOR_ID_GCR6 },
+ { TRACK_HEAD_ID_GCR6 },
+ { SECTOR_INFO_GCR6 },
+ { CRC_END, 0 },
+ { CRC, 0 },
+ { RAWBITS, 0xdeaaff, 24 },
+ { RAWBITS, 0xff3fcf, 24 }, { RAWBITS, 0xf3fcff, 24 },
+ { RAWBITS, 0xd5aaad, 24 },
+ { SECTOR_ID_GCR6 },
+ { SECTOR_DATA_MAC, -1 },
+ { RAWBITS, 0xdeaaff, 24 },
+ { RAWBITS, 0xff, 8 },
+ { SECTOR_LOOP_END },
+ { END },
+};
+
+
+bool a2_rwts18_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
+{
+/* TODO: rewrite me properly
+ UINT8 sector_data[(256)*16];
+ memset(sector_data, 0, sizeof(sector_data));
+
+ desc_s sectors[16];
+ int format = 0;
+ int pos_data = 0;
+
+ int head_count = 1;
+
+ for(int track=0; track < 35; track++) {
+ for(int head=0; head < head_count; head++) {
+ for(int si=0; si<16; si++) {
+ UINT8 *data = sector_data + (256)*si;
+ sectors[si].data = data;
+ sectors[si].size = 256;
+ sectors[si].sector_id = si;
+ sectors[si].sector_info = format;
+ io_generic_read(io, data, pos_data, 256);
+ pos_data += 256;
+ }
+ generate_track(mac_gcr, track, head, sectors, 16, 3104*16, image);
+ }
+ }
+ return true;*/
+ return false; // I hope that throws an error...
+}
+
+UINT8 a2_rwts18_format::gb(const UINT8 *buf, int ts, int &pos, int &wrap)
+{
+ UINT8 v = 0;
+ int w1 = wrap;
+ while(wrap != w1+2 && !(v & 0x80)) {
+ v = v << 1 | ((buf[pos >> 3] >> (7-(pos & 7))) & 1);
+ pos++;
+ if(pos == ts) {
+ pos = 0;
+ wrap++;
+ }
+ }
+ return v;
+}
+
+void a2_rwts18_format::update_chk(const UINT8 *data, int size, UINT32 &chk)
+{
+}
+
+bool a2_rwts18_format::save(io_generic *io, floppy_image *image)
+{
+ int g_tracks, g_heads;
+ int visualgrid[18][35]; // visualizer grid, cleared/initialized below
+// lenient addr check: if unset, only accept an addr mark if the checksum was good
+// if set, accept an addr mark if the track and sector values are both sane
+#undef LENIENT_ADDR_CHECK
+// if set, use the old, not as robust logic for choosing which copy of a decoded sector to write
+// to the resulting image if the sector has a bad checksum and/or postamble
+#undef USE_OLD_BEST_SECTOR_PRIORITY
+// select a sector order for resulting file: 0 = logical, 1 = dos3.3, 2 = prodos
+#define SECTOR_ORDER 1
+// nothing found
+#define NOTFOUND 0
+// address mark was found
+#define ADDRFOUND 1
+// address checksum is good
+#define ADDRGOOD 2
+// data mark was found (requires addrfound and sane values)
+#define DATAFOUND 4
+// data checksum is good
+#define DATAGOOD 8
+// data postamble is good
+#define DATAPOST 16
+ for (int i = 0; i < 18; i++) {
+ for (int j = 0; j < 35; j++) {
+ visualgrid[i][j] = 0;
+ }
+ }
+ image->get_actual_geometry(g_tracks, g_heads);
+
+ int head = 0;
+
+ int pos_data = 0;
+
+ // for track 0 ONLY:
+ UINT8 sectdata[(768)*6];
+ memset(sectdata, 0, sizeof(sectdata));
+ int nsect = 18;
+ UINT8 buf[130000]; // originally 13000, multiread dfi disks need larger
+ int ts;
+//fprintf(stderr,"DEBUG: a2_rwts18_format::save() about to generate bitstream from physical track %d (logical %d)...", track, track/2);
+ //~332 samples per cell, times 3+8+3 (14) for address mark, 24 for sync, 3+343+3 (349) for data mark, 24 for sync is around 743, near 776 expected
+ generate_bitstream_from_track(0, head, 200000000/((3004*nsect*6)/2), buf, ts, image); // 3104 needs tweaking
+//fprintf(stderr,"done.\n");
+ int pos = 0;
+ int wrap = 0;
+ int hb = 0;
+ int dosver = 0; // apple dos version; 0 = >=3.3, 1 = <3.3
+ for(;;) {
+ UINT8 v = gb(buf, ts, pos, wrap);
+ if(v == 0xff)
+ hb = 1;
+ else if(hb == 1 && v == 0xd5)
+ hb = 2;
+ else if(hb == 2 && v == 0xaa)
+ hb = 3;
+ else if(hb == 3 && ((v == 0x96) || (v == 0xab))) { // 0x96 = dos 3.3/16sec, 0xab = dos 3.21 and below/13sec
+ hb = 4;
+ if (v == 0xab) dosver = 1;
+ }
+ else
+ hb = 0;
+
+ if(hb == 4) {
+ UINT8 h[11];
+ for(int i=0; i<11; i++)
+ h[i] = gb(buf, ts, pos, wrap);
+ //UINT8 v2 = gcr6bw_tb[h[2]];
+ UINT8 vl = gcr4_decode(h[0],h[1]);
+ UINT8 tr = gcr4_decode(h[2],h[3]);
+ UINT8 se = gcr4_decode(h[4],h[5]);
+ UINT8 chk = gcr4_decode(h[6],h[7]);
+ UINT32 post = (h[8]<<16)|(h[9]<<8)|h[10];
+ printf("Address Mark:\tVolume %d, Track %d, Sector %2d, Checksum %02X: %s, Postamble %03X: %s\n", vl, tr, se, chk, (chk ^ vl ^ tr ^ se)==0?"OK":"BAD", post, (post&0xFFFF00)==0xDEAA00?"OK":"BAD");
+ // sanity check
+ if (tr == 0 && se < nsect) {
+ visualgrid[se][0] |= ADDRFOUND;
+ visualgrid[se][0] |= ((chk ^ vl ^ tr ^ se)==0)?ADDRGOOD:0;
+#ifdef LENIENT_ADDR_CHECK
+// if ((visualgrid[se][0] & ADDRFOUND) == ADDRFOUND) {
+#else
+ if ((visualgrid[se][0] & ADDRGOOD) == ADDRGOOD) {
+#endif
+ int opos = pos;
+ int owrap = wrap;
+ hb = 0;
+ for(int i=0; i<20 && hb != 4; i++) {
+ v = gb(buf, ts, pos, wrap);
+ if(v == 0xff)
+ hb = 1;
+ else if(hb == 1 && v == 0xd5)
+ hb = 2;
+ else if(hb == 2 && v == 0xaa)
+ hb = 3;
+ else if(hb == 3 && v == 0xad)
+ hb = 4;
+ else
+ hb = 0;
+ }
+ if((hb == 4)&&(dosver == 0)) {
+ visualgrid[se][0] |= DATAFOUND;
+ int sector_translate[16] = {
+#if SECTOR_ORDER == 0
+ // logical order (0-15)
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F
+#elif SECTOR_ORDER == 1
+ // DOS order (*.do)
+ 0x00, 0x07, 0x0E, 0x06, 0x0D, 0x05, 0x0C, 0x04,
+ 0x0B, 0x03, 0x0A, 0x02, 0x09, 0x01, 0x08, 0x0F
+#elif SECTOR_ORDER == 2
+ // prodos order (*.po)
+ 0x00, 0x08, 0x01, 0x09, 0x02, 0x0A, 0x03, 0x0B,
+ 0x04, 0x0C, 0x05, 0x0D, 0x06, 0x0E, 0x07, 0x0F
+#endif
+ };
+ UINT8 *dest = sectdata+(256)*sector_translate[se];
+ UINT8 data[0x157];
+ UINT32 dpost = 0;
+ UINT8 c = 0;
+ // first read in sector and decode to 6bit form
+ for(int i=0; i<0x156; i++) {
+ data[i] = gcr6bw_tb[gb(buf, ts, pos, wrap)] ^ c;
+ c = data[i];
+ // printf("%02x ", c);
+ // if (((i&0xf)+1)==0x10) printf("\n");
+ }
+ // read the checksum byte
+ data[0x156] = gcr6bw_tb[gb(buf,ts,pos,wrap)];
+ // now read the postamble bytes
+ for(int i=0; i<3; i++) {
+ dpost <<= 8;
+ dpost |= gb(buf, ts, pos, wrap);
+ }
+ // next combine in the upper 2 bits of each byte
+ UINT8 bit_swap[4] = { 0, 2, 1, 3 };
+ for(int i=0; i<0x56; i++)
+ data[i+0x056] = data[i+0x056]<<2 | bit_swap[data[i]&3];
+ for(int i=0; i<0x56; i++)
+ data[i+0x0ac] = data[i+0x0ac]<<2 | bit_swap[(data[i]>>2)&3];
+ for(int i=0; i<0x54; i++)
+ data[i+0x102] = data[i+0x102]<<2 | bit_swap[(data[i]>>4)&3];
+ // now decode it into 256 bytes
+ // but only write it if the bitfield of the track shows datagood is NOT set.
+ // if it is set we don't want to overwrite a guaranteed good read with a bad one
+ // if past read had a bad checksum or bad postamble...
+#ifndef USE_OLD_BEST_SECTOR_PRIORITY
+ if (((visualgrid[se][0]&DATAGOOD)==0)||((visualgrid[se][0]&DATAPOST)==0)) {
+ // if the current read is good, and postamble is good, write it in, no matter what.
+ // if the current read is good and the current postamble is bad, write it in unless the postamble was good before
+ // if the current read is bad and the current postamble is good and the previous read had neither good, write it in
+ // if the current read isn't good and neither is the postamble but nothing better
+ // has been written before, write it anyway.
+ if ( ((data[0x156] == c) && (dpost&0xFFFF00)==0xDEAA00) ||
+ (((data[0x156] == c) && (dpost&0xFFFF00)!=0xDEAA00) && ((visualgrid[se][0]&DATAPOST)==0)) ||
+ (((data[0x156] != c) && (dpost&0xFFFF00)==0xDEAA00) && (((visualgrid[se][0]&DATAGOOD)==0)&&(visualgrid[se][0]&DATAPOST)==0)) ||
+ (((data[0x156] != c) && (dpost&0xFFFF00)!=0xDEAA00) && (((visualgrid[se][0]&DATAGOOD)==0)&&(visualgrid[se][0]&DATAPOST)==0))
+ ) {
+ for(int i=0x56; i<0x156; i++) {
+ UINT8 dv = data[i];
+ *dest++ = dv;
+ }
+ }
+ }
+#else
+ if ((visualgrid[se][0]&DATAGOOD)==0) {
+ for(int i=0x56; i<0x156; i++) {
+ UINT8 dv = data[i];
+ *dest++ = dv;
+ }
+ }
+#endif
+ // do some checking
+ if ((data[0x156] != c) || (dpost&0xFFFF00)!=0xDEAA00)
+ fprintf(stderr,"Data Mark:\tChecksum xpctd %d found %d: %s, Postamble %03X: %s\n", data[0x156], c, (data[0x156]==c)?"OK":"BAD", dpost, (dpost&0xFFFF00)==0xDEAA00?"OK":"BAD");
+ if (data[0x156] == c) visualgrid[se][0] |= DATAGOOD;
+ if ((dpost&0xFFFF00)==0xDEAA00) visualgrid[se][0] |= DATAPOST;
+ } else if ((hb == 4)&&(dosver == 1)) {
+ fprintf(stderr,"ERROR: We don't handle dos sectors below 3.3 yet!\n");
+ } else {
+ pos = opos;
+ wrap = owrap;
+ }
+ }
+ }
+ hb = 0;
+ }
+ if(wrap)
+ break;
+ }
+ for(int i=0; i<nsect; i++) {
+ //if(nsect>0) printf("t%d,", track);
+ UINT8 *data = sectdata + (256)*i;
+ io_generic_write(io, data, pos_data, 256);
+ pos_data += 256;
+ }
+
+ // for the rest of the tracks
+ for(int track=2; track < 70; track+=2) {
+ UINT8 sectdata[(768)*6];
+ memset(sectdata, 0, sizeof(sectdata));
+ int nsect = 18;
+ UINT8 buf[130000]; // originally 13000, multiread dfi disks need larger
+ int ts;
+//fprintf(stderr,"DEBUG: a2_rwts18_format::save() about to generate bitstream from physical track %d (logical %d)...", track, track/2);
+ //~332 samples per cell, times 3+8+3 (14) for address mark, 24 for sync, 3+343+3 (349) for data mark, 24 for sync is around 743, near 776 expected
+ generate_bitstream_from_track(track, head, 200000000/((3004*nsect*6)/2), buf, ts, image); // 3104 needs tweaking
+//fprintf(stderr,"done.\n");
+ int oldpos = 0; // DEBUG
+ int pos = 0;
+ int wrap = 0;
+ int hb = 0;
+ for(;;) {
+ UINT8 v = gb(buf, ts, pos, wrap);
+ if((v == 0xff) || (v == 0x9a)) // note 0x9a varies per title! this is an LFSR? generated value intended to throw off copiers, and only appears after the track splice (before sector 5)
+ hb = 1;
+ else if(hb == 1 && v == 0xd5)
+ hb = 2;
+ else if(hb == 2 && v == 0x9d)
+ hb = 3;
+ else
+ hb = 0;
+
+ if(hb == 3) {
+ printf("AM at offset: %d, relative: %d\n", pos, pos-oldpos);
+ oldpos=pos;
+ UINT8 h[7];
+ // grab exactly 7 bytes: should be Track, Sector, Checksum, AA, FF and FF and the Br0derbund Title ID
+ for(int i=0; i<7; i++)
+ h[i] = gb(buf, ts, pos, wrap);
+ UINT8 tr = gcr6bw_tb[h[0]];
+ UINT8 se = gcr6bw_tb[h[1]];
+ UINT8 chk = gcr6bw_tb[h[2]];
+ UINT32 post = (h[3]<<16)|(h[4]<<8)|h[5];
+ UINT8 bbundid = h[6];
+ printf("RWTS18 AM:\t Track %d, Sector %2d, Checksum %02X: %s, Postamble %03X: %s, BBUNDID %02x\n", tr, se, chk, (chk ^ tr ^ se)==0?"OK":"BAD", post, post==0xAAFFFF?"OK":"BAD", bbundid);
+ // sanity check
+ if (tr == track/2 && se < nsect) {
+ visualgrid[se][track/2] |= ADDRFOUND;
+ visualgrid[se][track/2] |= ((chk ^ tr ^ se)==0)?ADDRGOOD:0;
+#ifdef LENIENT_ADDR_CHECK
+// if ((visualgrid[se][track/2] & ADDRFOUND) == ADDRFOUND) {
+#else
+ if ((visualgrid[se][track/2] & ADDRGOOD) == ADDRGOOD) {
+#endif
+ //int opos = pos;
+ //int owrap = wrap;
+ // RWTS18 doesn't have a true data mark, its part of the address header
+ visualgrid[se][track/2] |= DATAFOUND;
+ UINT8 *dest = sectdata+(256)*se;
+ UINT8 data[0x401];
+ UINT32 dpost = 0;
+ UINT8 c = 0;
+ //dest = sectdata+(768)*se;
+ // now read in the sector and decode to 6bit form
+ for(int i=0; i<0x400; i++) {
+ data[i] = gcr6bw_tb[gb(buf, ts, pos, wrap)] ;//^ c;
+ c ^= data[i];
+ /*if (((i&0x3)+1)==0x04) {
+ printf("%c", ((((data[i-3]&0x30)<<2)|((data[i-2]&0x3F)>>0))&0x3F)+0x40);
+ printf("%c", ((((data[i-3]&0x0C)<<4)|((data[i-1]&0x3F)>>0))&0x3F)+0x40);
+ printf("%c", ((((data[i-3]&0x03)<<6)|((data[i-0]&0x3F)>>0))&0x3F)+0x40);
+ *dest++ = ((data[i-3]&0x30)<<2)|((data[i-2]&0x3F)>>0);
+ *dest++ = ((data[i-3]&0x0C)<<4)|((data[i-1]&0x3F)>>0);
+ *dest++ = ((data[i-3]&0x03)<<6)|((data[i-0]&0x3F)>>0);
+ }*/
+ // printf("%02x ", data[i]);
+ // if (((i&0xf)+1)==0x10) printf("\n");
+ }
+ // read the checksum byte (checksum is calced by xoring all data together)
+ data[0x400] = gcr6bw_tb[gb(buf,ts,pos,wrap)];
+ // now read the postamble bytes
+ for(int i=0; i<4; i++) {
+ dpost <<= 8;
+ dpost |= gb(buf, ts, pos, wrap);
+ }
+
+ /*if (se == 0) // dump some debug data to help find the lfsr before sector 5
+ {
+ printf("Data Postamble was 0x%08x\n", dpost);
+ for(int i=0; i<0x400; i++) {
+ data[i] = gcr6bw_tb[gb(buf, ts, pos, wrap)] ;//^ c;
+ c ^= data[i];
+ printf("%02x ", data[i]);
+ if (((i&0xf)+1)==0x10) printf("\n");
+ }
+ }*/
+
+ // only write it if the bitfield of the track shows datagood is NOT set.
+ // if it is set we don't want to overwrite a guaranteed good read with a bad one
+ // if past read had a bad checksum or bad postamble...
+#ifndef USE_OLD_BEST_SECTOR_PRIORITY
+ if (((visualgrid[se][track/2]&DATAGOOD)==0)||((visualgrid[se][track/2]&DATAPOST)==0)) {
+ // if the current read is good, and postamble is good, write it in, no matter what.
+ // if the current read is good and the current postamble is bad, write it in unless the postamble was good before
+ // if the current read is bad and the current postamble is good and the previous read had neither good, write it in
+ // if the current read isn't good and neither is the postamble but nothing better
+ // has been written before, write it anyway.
+ if ( ((data[0x400] == c) && (dpost&0xFF000000)==0xD4000000) ||
+ (((data[0x400] == c) && (dpost&0xFF000000)!=0xD4000000) && ((visualgrid[se][track/2]&DATAPOST)==0)) ||
+ (((data[0x400] != c) && (dpost&0xFF000000)==0xD4000000) && (((visualgrid[se][track/2]&DATAGOOD)==0)&&(visualgrid[se][track/2]&DATAPOST)==0)) ||
+ (((data[0x400] != c) && (dpost&0xFF000000)!=0xD4000000) && (((visualgrid[se][track/2]&DATAGOOD)==0)&&(visualgrid[se][track/2]&DATAPOST)==0))
+ ) {
+ // next combine adjacent data bytes to form the 3 constituent sectors
+ // format is 0x00AaBbCc 0x00aaaaaa 0x00bbbbbb 0x00cccccc 0x00AaBbCc ... etc
+ // aa is sector 0, bb is sector 6, cc is sector 12
+ // first sector:
+ dest = sectdata+(256)*se;
+ for(int i=0; i<0x100; i++) {
+ data[(4*i)+1] |= (data[4*i]&0x30)<<2;
+ //printf("%c", (data[4*i]&0x3F)+0x40);
+ //if (((i&0xf)+1)==0x10) printf("\n");
+ UINT8 dv = data[(4*i)+1];
+ *dest++ = dv;
+ }
+ // second sector:
+ dest = sectdata+(256)*(se+6);
+ for(int i=0; i<0x100; i++) {
+ data[(4*i)+2] |= (data[4*i]&0x0c)<<4;
+ UINT8 dv = data[(4*i)+2];
+ *dest++ = dv;
+ }
+ // third sector:
+ dest = sectdata+(256)*(se+12);
+ for(int i=0; i<0x100; i++) {
+ data[(4*i)+3] |= (data[4*i]&0x03)<<6;
+ UINT8 dv = data[(4*i)+3];
+ *dest++ = dv;
+ }
+ }
+ }
+#else
+ if ((visualgrid[se][track/2]&DATAGOOD)==0) {
+ // next combine adjacent data bytes to form the 3 constituent sectors
+ // format is 0x00AaBbCc 0x00aaaaaa 0x00bbbbbb 0x00cccccc 0x00AaBbCc ... etc
+ // aa is sector 0, bb is sector 6, cc is sector 12
+ // first sector:
+ dest = sectdata+(256)*se;
+ for(int i=0; i<0x100; i++) {
+ data[(4*i)+1] |= (data[4*i]&0x30)<<2;
+ //printf("%c", (data[4*i]&0x3F)+0x40);
+ //if (((i&0xf)+1)==0x10) printf("\n");
+ UINT8 dv = data[(4*i)+1];
+ *dest++ = dv;
+ }
+ // second sector:
+ dest = sectdata+(256)*(se+6);
+ for(int i=0; i<0x100; i++) {
+ data[(4*i)+2] |= (data[4*i]&0x0c)<<4;
+ UINT8 dv = data[(4*i)+2];
+ *dest++ = dv;
+ }
+ // third sector:
+ dest = sectdata+(256)*(se+12);
+ for(int i=0; i<0x100; i++) {
+ data[(4*i)+3] |= (data[4*i]&0x03)<<6;
+ UINT8 dv = data[(4*i)+3];
+ *dest++ = dv;
+ }
+ }
+#endif
+ // do some checking
+ if ((data[0x400] != c) || (dpost&0xFF000000)!=0xD4000000)
+ fprintf(stderr,"Data Mark:\tChecksum xpctd %d found %d: %s, Postamble %03X: %s\n", data[0x400], c, (data[0x400]==c)?"OK":"BAD", dpost, (dpost&0xFF000000)==0xD4000000?"OK":"BAD");
+ if (data[0x400] == c) visualgrid[se][track/2] |= DATAGOOD;
+ if ((dpost&0xFF000000)==0xD4000000) visualgrid[se][track/2] |= DATAPOST;
+ }
+ }
+ hb = 0;
+ }
+ if(wrap)
+ break;
+ }
+ for(int i=0; i<nsect; i++) {
+ //if(nsect>0) printf("t%d,", track);
+ UINT8 *data = sectdata + (256)*i;
+ io_generic_write(io, data, pos_data, 256);
+ pos_data += 256;
+ }
+ //printf("\n");
+ }
+ // display a little table of which sectors decoded ok
+ int total_good = 0;
+ for (int j = 0; j < 35; j++) {
+ printf("T%2d: ",j);
+ for (int i = 0; i < (j==0?16:6); i++) {
+ if (visualgrid[i][j] == NOTFOUND) printf("-NF- ");
+ else {
+ if (visualgrid[i][j] & ADDRFOUND) printf("a"); else printf(" ");
+ if (visualgrid[i][j] & ADDRGOOD) printf("A"); else printf(" ");
+ if (visualgrid[i][j] & DATAFOUND) printf("d"); else printf(" ");
+ if (visualgrid[i][j] & DATAGOOD) { printf("D"); total_good++; } else printf(" ");
+ if (visualgrid[i][j] & DATAPOST) printf("."); else printf(" ");
+ }
+ }
+ printf("\n");
+ }
+ printf("Total Good Sectors: %d\n", total_good);
+
+ return true;
+}
+
+const floppy_format_type FLOPPY_RWTS18_FORMAT = &floppy_image_format_creator<a2_rwts18_format>;
+
+a2_edd_format::a2_edd_format() : floppy_image_format_t()
+{
+}
+
+const char *a2_edd_format::name() const
+{
+ return "a2_edd";
+}
+
+const char *a2_edd_format::description() const
+{
+ return "Apple II EDD Image";
+}
+
+const char *a2_edd_format::extensions() const
+{
+ return "edd";
+}
+
+bool a2_edd_format::supports_save() const
+{
+ return true;
+}
+
+int a2_edd_format::identify(io_generic *io, UINT32 form_factor)
+{
+ return ((io_generic_size(io) == 2244608) || (io_generic_size(io) == 2310144)) ? 50 : 0;
+}
+
+UINT8 a2_edd_format::pick(const UINT8 *data, int pos)
+{
+ return ((data[pos>>3] << 8) | data[(pos>>3)+1]) >> (8-(pos & 7));
+}
+
+bool a2_edd_format::load(io_generic *io, UINT32 form_factor, floppy_image *image)
+{
+ UINT8 *img;
+ UINT8 nibble[16384], stream[16384];
+ int npos[16384];
+
+ img = (UINT8 *) malloc(2244608);
+
+ if (!img)
+ {
+ return false;
+ }
+
+ io_generic_read(io, img, 0, 2244608);
+
+ for(int i=0; i<137; i++) {
+ const UINT8 *trk = img + 16384*i;
+ int pos = 0;
+ int wpos = 0;
+ while(pos < 16383*8) {
+ UINT8 acc = pick(trk, pos);
+ pos += 8;
+ while(!(acc & 0x80) && pos < 16384*8) {
+ acc <<= 1;
+ if(trk[pos >> 3] & (0x80 >> (pos & 7)))
+ acc |= 0x01;
+ pos++;
+ }
+ if(acc & 0x80) {
+ nibble[wpos] = acc;
+ npos[wpos] = pos;
+ wpos++;
+ }
+ }
+ int nm = 0, nmj = 0, nmk = 0;
+ for(int j=0; j<wpos-1; j++)
+ for(int k=j+6200; k<wpos && k<j+6400; k++) {
+ int m = 0;
+ for(int l=0; k+l<wpos && nibble[j+l] == nibble[k+l]; l++)
+ m++;
+ if(m > nm) {
+ nm = m;
+ nmj = j;
+ nmk = k;
+ }
+ }
+ int delta = nmk - nmj;
+ int spos = (wpos-delta)/2;
+ int zpos = npos[spos];
+ int epos = npos[spos+delta];
+ int len = epos-zpos;
+ int part1_size = zpos % len;
+ int part1_bsize = part1_size >> 3;
+ int part1_spos = epos-part1_size;
+ int part2_offset = zpos - part1_size;
+ int total_bsize = (len+7) >> 3;
+
+ for(int j=0; j<part1_bsize; j++)
+ stream[j] = pick(trk, part1_spos + 8*j);
+ stream[part1_bsize] =
+ (pick(trk, part1_spos + 8*part1_bsize) & (0xff00 >> (part1_size & 7))) |
+ (pick(trk, part2_offset + 8*part1_bsize) & (0x00ff >> (part1_size & 7)));
+ for(int j=part1_bsize+1; j<total_bsize; j++)
+ stream[j] = pick(trk, part2_offset + 8*j);
+
+ bool odd = false;
+ for(int j=0; j<len; j++)
+ if(stream[j>>3] & (0x80 >> (j & 7)))
+ odd = !odd;
+
+ int splice_byte = spos;
+ while(splice_byte < spos+delta && (npos[splice_byte+1] - npos[splice_byte] != 8 || npos[splice_byte+2] - npos[splice_byte+1] == 8 || npos[splice_byte+3] - npos[splice_byte+2] == 8))
+ splice_byte++;
+ int splice = (npos[splice_byte+2]-1) % len;
+ if(odd)
+ stream[splice >> 3] ^= 0x80 >> (splice & 7);
+
+ generate_track_from_bitstream(i >> 2, 0, stream, len, image, i & 3);
+ image->set_write_splice_position(i >> 2, 0, UINT32(U64(200000000)*splice/len), i & 3);
+ }
+ free(img);
+ return true;
+}
+
+const floppy_format_type FLOPPY_EDD_FORMAT = &floppy_image_format_creator<a2_edd_format>;