mirror of https://github.com/akuker/RASCSI.git
108 lines
2.4 KiB
C++
108 lines
2.4 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 "fileio.h"
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#include "exceptions.h"
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#include "../config.h"
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SASIHD::SASIHD(const set<uint32_t>& sector_sizes) : Disk("SAHD")
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{
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SetSectorSizes(sector_sizes);
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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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SetLocked(false);
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SetAttn(false);
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// Reset, clear the code
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SetReset(false);
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SetStatusCode(STATUS_NOERROR);
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}
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void SASIHD::Open(const Filepath& path)
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{
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assert(!IsReady());
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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 file_not_found_exception("Can't open SASI hard disk file");
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}
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// Get file size
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off_t size = fio.GetFileSize();
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fio.Close();
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// Sector size (default 256 bytes) and number of blocks
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SetSectorSizeInBytes(GetConfiguredSectorSize() ? GetConfiguredSectorSize() : 256, true);
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SetBlockCount((DWORD)(size >> GetSectorSizeShiftCount()));
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#if defined(REMOVE_FIXED_SASIHD_SIZE)
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// Effective size must be a multiple of the sector size
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size = (size / GetSectorSizeInBytes()) * GetSectorSizeInBytes();
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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 io_exception("Unsupported file size");
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}
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#endif // REMOVE_FIXED_SASIHD_SIZE
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Disk::Open(path);
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FileSupport::SetPath(path);
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}
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int SASIHD::Inquiry(const DWORD* /*cdb*/, BYTE* /*buf*/)
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{
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SetStatusCode(STATUS_INVALIDCMD);
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return 0;
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}
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int SASIHD::RequestSense(const DWORD *cdb, BYTE *buf)
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{
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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)(GetStatusCode() >> 16);
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buf[1] = (BYTE)(GetLun() << 5);
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return size;
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}
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