mirror of
https://github.com/holub/mame
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ddb290d5f6
Use standard uint64_t, uint32_t, uint16_t or uint8_t instead of UINT64, UINT32, UINT16 or UINT8 also use standard int64_t, int32_t, int16_t or int8_t instead of INT64, INT32, INT16 or INT8
108 lines
2.6 KiB
C++
108 lines
2.6 KiB
C++
// license:BSD-3-Clause
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// copyright-holders:Barry Rodewald
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/*
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* flex_dsk.c - FLEX compatible disk images
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*
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* Created on: 24/06/2014
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*/
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#include "emu.h" // logerror
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#include "flex_dsk.h"
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flex_format::flex_format()
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{
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}
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const char *flex_format::name() const
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{
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return "flex";
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}
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const char *flex_format::description() const
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{
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return "FLEX compatible disk image";
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}
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const char *flex_format::extensions() const
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{
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return "dsk";
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}
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bool flex_format::supports_save() const
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{
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return true;
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}
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int flex_format::identify(io_generic *io, uint32_t form_factor)
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{
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io_generic_read(io, &info, 256 * 2, sizeof(struct sysinfo_sector));
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if(((info.last_trk+1) * info.last_sec) * 256 == io_generic_size(io))
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{
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osd_printf_verbose("flex_dsk: %i tracks, %i sectors\n",info.last_trk+1,info.last_sec);
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return 100;
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}
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return 0;
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}
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bool flex_format::load(io_generic *io, uint32_t form_factor, floppy_image *image)
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{
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int spt = info.last_sec;
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int bps = 256;
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int cell_count = (form_factor == floppy_image::FF_525) ? 50000 : 100000;
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int offset = 0;
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int head_num = 1;
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int total_tracks = info.last_trk+1;
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bool double_sided = false;
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if(total_tracks == 40 && spt == 36)
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double_sided = true;
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if(total_tracks == 77 && spt == 30)
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double_sided = true;
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if(total_tracks == 80 && spt == 40) // 800kB
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double_sided = true;
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if(total_tracks == 80 && spt == 72) // 1.44MB
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double_sided = true;
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if(spt >= 20)
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double_sided = true;
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if(double_sided)
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{
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spt = spt / 2;
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head_num = 2;
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}
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for(int track=0; track < total_tracks; track++)
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for(int head=0;head < head_num;head++)
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{
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desc_pc_sector sects[80];
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uint8_t sect_data[20000];
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int sdatapos = 0;
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for(int i=0; i<spt; i++)
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{
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sects[i].track = track;
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sects[i].head = head; // no side select?
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if(head == 0)
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sects[i].sector = i+1;
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else
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sects[i].sector = i+1+spt;
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sects[i].actual_size = bps;
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sects[i].size = 1;
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sects[i].deleted = false;
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sects[i].bad_crc = false;
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sects[i].data = §_data[sdatapos];
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io_generic_read(io, sects[i].data, offset, bps);
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offset += bps;
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sdatapos += bps;
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}
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// gap sizes unverified
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if(total_tracks == 35 && spt == 18 && (track >= 1 && track <= 2)) // handle Gimix Flex 3.6 disk image, which the boot sector loads tracks 1 and 2 as MFM
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build_wd_track_mfm(track, head, image, cell_count*2, spt, sects, 50, 32, 22);
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else
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build_wd_track_fm(track, head, image, cell_count, spt, sects, 24, 16, 11);
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}
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return true;
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}
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const floppy_format_type FLOPPY_FLEX_FORMAT = &floppy_image_format_creator<flex_format>;
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