diff options
author | 2019-07-01 23:56:11 +0300 | |
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committer | 2019-07-02 01:13:38 +0300 | |
commit | a152d1125fde01e80ab3e9cccd475a50c22c6316 (patch) | |
tree | 1649ac05dc5a9b75a5458c7662d87d28cc812bae /src/lib/formats/aim_dsk.cpp | |
parent | 35af77fcfad6db45904b555e8bd2d2a97fc51800 (diff) |
agat: basic emulation of agat9 (video, apple compat mode, LLE floppy)
also included: MX floppy format (nw)
Diffstat (limited to 'src/lib/formats/aim_dsk.cpp')
-rw-r--r-- | src/lib/formats/aim_dsk.cpp | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/lib/formats/aim_dsk.cpp b/src/lib/formats/aim_dsk.cpp new file mode 100644 index 00000000000..3bc2c2b5b5f --- /dev/null +++ b/src/lib/formats/aim_dsk.cpp @@ -0,0 +1,108 @@ +// license:BSD-3-Clause +// copyright-holders:Sergey Svishchev +/********************************************************************* + + formats/aim_dsk.h + + AIM disk images + + References: + - http://www.torlus.com/floppy/forum/viewtopic.php?f=19&t=1385 + - http://agatcomp.ru/Soft/agat.shtml + +*********************************************************************/ + +#include <assert.h> + +#include "aim_dsk.h" + + +aim_format::aim_format() +{ +} + + +const char *aim_format::name() const +{ + return "aim"; +} + + +const char *aim_format::description() const +{ + return "AIM disk image"; +} + + +const char *aim_format::extensions() const +{ + return "aim"; +} + + +int aim_format::identify(io_generic *io, uint32_t form_factor) +{ + if (io_generic_size(io) == 2068480) + { + return 100; + } + + return 0; +} + + +bool aim_format::load(io_generic *io, uint32_t form_factor, floppy_image *image) +{ + image->set_variant(floppy_image::DSQD); + + const int tracks = 80; + const int track_size = 6464 * 2; + const int heads = 2; + + for (int track = 0; track < tracks; track++) + { + for (int head = 0; head < heads; head++) + { + std::vector<uint8_t> track_data(track_size); + std::vector<uint32_t> raw_track_data; + int data_count = 0; + bool header = false; + + // Read track + io_generic_read(io, &track_data[0], ( heads * track + head ) * track_size, track_size); + + for (int offset = 0; offset < track_size; offset += 2) + { + switch (track_data[offset + 1] & 1) + { + case 0: + if (data_count == 0) + header = (track_data[offset] == 0x95) ? true : false; + data_count++; + mfm_w(raw_track_data, 8, track_data[offset]); + break; + + case 1: + if (header && data_count < 11) // XXX hack + { + for (; data_count < 12; data_count++) + { + mfm_w(raw_track_data, 8, 0xaa); + } + } + raw_w(raw_track_data, 16, 0x8924); + raw_w(raw_track_data, 16, 0x5555); + data_count = 0; + break; + } + } + + generate_track_from_levels(track, head, raw_track_data, 0, image); + } + } + + return true; +} + + +const floppy_format_type FLOPPY_AIM_FORMAT = &floppy_image_format_creator<aim_format>; |