mirror of
https://github.com/holub/mame
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87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
// license:BSD-3-Clause
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// copyright-holders:Miodrag Milanovic
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/*********************************************************************
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formats/atarist_dsk.c
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Atari ST disk images
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*********************************************************************/
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#include <assert.h>
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#include "formats/atarist_dsk.h"
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#include "formats/basicdsk.h"
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/*
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TODO:
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- MSA format
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- STT format
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- DIM format
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*/
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/***************************************************************************
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CONSTANTS / MACROS
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***************************************************************************/
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#define LOG 0
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/***************************************************************************
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IMPLEMENTATION
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***************************************************************************/
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/*-------------------------------------------------
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FLOPPY_IDENTIFY( atarist_st_identify )
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-------------------------------------------------*/
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static FLOPPY_IDENTIFY( atarist_st_identify )
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{
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*vote = 100;
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return FLOPPY_ERROR_SUCCESS;
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}
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/*-------------------------------------------------
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FLOPPY_CONSTRUCT( atarist_st_construct )
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-------------------------------------------------*/
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static FLOPPY_CONSTRUCT( atarist_st_construct )
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{
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int heads = 0;
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int tracks = 0;
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int sectors = 0;
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UINT8 bootsector[512];
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floppy_image_read(floppy, bootsector, 0, 512);
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sectors = bootsector[0x18];
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heads = bootsector[0x1a];
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tracks = (bootsector[0x13] | (bootsector[0x14] << 8)) / sectors / heads;
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struct basicdsk_geometry geometry;
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memset(&geometry, 0, sizeof(geometry));
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geometry.heads = heads;
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geometry.first_sector_id = 1;
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geometry.sector_length = 512;
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geometry.tracks = tracks;
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geometry.sectors = sectors;
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if (LOG) LOG_FORMATS("ST Heads %d Tracks %d Sectors %d\n", heads, tracks, sectors);
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return basicdsk_construct(floppy, &geometry);
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}
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/*-------------------------------------------------
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FLOPPY_CONSTRUCT(atarist_dsk_construct)
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-------------------------------------------------*/
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LEGACY_FLOPPY_OPTIONS_START( atarist )
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LEGACY_FLOPPY_OPTION( atarist, "st", "Atari ST floppy disk image", atarist_st_identify, atarist_st_construct, NULL, NULL )
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/* LEGACY_FLOPPY_OPTION( atarist, "stt", "Atari ST floppy disk image", atarist_stt_identify, atarist_stt_construct, NULL, NULL )
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LEGACY_FLOPPY_OPTION( atarist, "msa", "Atari ST floppy disk image", atarist_msa_identify, atarist_msa_construct, NULL, NULL )
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LEGACY_FLOPPY_OPTION( atarist, "dim", "Atari ST floppy disk image", atarist_dim_identify, atarist_dim_construct, NULL, NULL )*/
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LEGACY_FLOPPY_OPTIONS_END
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