mirror of
https://github.com/akuker/RASCSI.git
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157172b566
* Use ioexception for file open error handling * Use standard string comparison functions * Error message update * Improved CD-ROM handling error messages
158 lines
3.6 KiB
C++
158 lines
3.6 KiB
C++
//---------------------------------------------------------------------------
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//
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// SCSI Target Emulator RaSCSI (*^..^*)
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// for Raspberry Pi
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//
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// Copyright (C) 2001-2006 ＰＩ．(ytanaka@ipc-tokai.or.jp)
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// Copyright (C) 2014-2020 GIMONS
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// Copyright (C) akuker
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//
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// Licensed under the BSD 3-Clause License.
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// See LICENSE file in the project root folder.
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//
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// [ SASI hard disk ]
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//
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//---------------------------------------------------------------------------
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#include "sasihd.h"
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#include "xm6.h"
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#include "fileio.h"
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#include "exceptions.h"
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//===========================================================================
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//
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// SASI Hard Disk
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//
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//===========================================================================
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//---------------------------------------------------------------------------
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//
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// Constructor
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//
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//---------------------------------------------------------------------------
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SASIHD::SASIHD() : Disk("SAHD")
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{
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disk.protectable = true;
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}
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//---------------------------------------------------------------------------
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//
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// Reset
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//
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//---------------------------------------------------------------------------
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void SASIHD::Reset()
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{
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// Unlock, clear attention
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disk.locked = FALSE;
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disk.attn = FALSE;
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// Reset, clear the code
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disk.reset = FALSE;
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disk.code = 0x00;
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}
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//---------------------------------------------------------------------------
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//
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// Open
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//
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//---------------------------------------------------------------------------
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void SASIHD::Open(const Filepath& path, BOOL /*attn*/)
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{
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ASSERT(!disk.ready);
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// Open as read-only
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Fileio fio;
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if (!fio.Open(path, Fileio::ReadOnly)) {
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throw ioexception("Can't open hard disk file read-only");
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}
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// Get file size
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off64_t size = fio.GetFileSize();
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fio.Close();
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#if defined(USE_MZ1F23_1024_SUPPORT)
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// For MZ-2500 / MZ-2800 MZ-1F23 (SASI 20M / sector size 1024) only
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// 20M(22437888 BS=1024 C=21912)
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if (size == 0x1566000) {
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// Sector size and number of blocks
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disk.size = 10;
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disk.blocks = (DWORD)(size >> 10);
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// Call the base class
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Disk::Open(path);
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}
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#endif // USE_MZ1F23_1024_SUPPORT
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#if defined(REMOVE_FIXED_SASIHD_SIZE)
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// Must be in 256-byte units
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if (size & 0xff) {
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throw ioexception("File size must be a multiple of 512 bytes");
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}
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// 10MB or more
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if (size < 0x9f5400) {
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throw ioexception("File size must be at least 10 MB");
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}
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// Limit to about 512MB
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if (size > 512 * 1024 * 1024) {
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throw ioexception("File size must not exceed 512 MB");
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}
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#else
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// 10MB, 20MB, 40MBのみ
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switch (size) {
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// 10MB (10441728 BS=256 C=40788)
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case 0x9f5400:
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break;
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// 20MB (20748288 BS=256 C=81048)
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case 0x13c9800:
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break;
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// 40MB (41496576 BS=256 C=162096)
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case 0x2793000:
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break;
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// Other (Not supported )
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default:
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throw ioexception("Unsupported file size");
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}
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#endif // REMOVE_FIXED_SASIHD_SIZE
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// Sector size and number of blocks
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disk.size = 8;
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disk.blocks = (DWORD)(size >> 8);
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// Call the base class
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Disk::Open(path);
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}
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//---------------------------------------------------------------------------
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//
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// REQUEST SENSE
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//
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//---------------------------------------------------------------------------
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int SASIHD::RequestSense(const DWORD *cdb, BYTE *buf)
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{
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ASSERT(cdb);
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ASSERT(buf);
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// Size decision
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int size = (int)cdb[4];
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ASSERT(size >= 0 && size < 0x100);
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// Transfer 4 bytes when size 0 (Shugart Associates System Interface specification)
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if (size == 0) {
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size = 4;
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}
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// SASI fixed to non-extended format
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memset(buf, 0, size);
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buf[0] = (BYTE)(disk.code >> 16);
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buf[1] = (BYTE)(disk.lun << 5);
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// Clear the code
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disk.code = 0x00;
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return size;
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}
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