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cebix |
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/* |
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* macos_util.cpp - MacOS definitions/utility functions |
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* |
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* Basilisk II (C) 1997-1999 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include "sysdeps.h" |
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#include "cpu_emulation.h" |
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#include "main.h" |
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#include "sony.h" |
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#include "disk.h" |
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#include "cdrom.h" |
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#include "macos_util.h" |
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#define DEBUG 0 |
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#include "debug.h" |
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/* |
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* Enqueue QElem to list |
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*/ |
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void Enqueue(uint32 elem, uint32 list) |
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{ |
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WriteMacInt32(elem + qLink, 0); |
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if (!ReadMacInt32(list + qTail)) { |
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WriteMacInt32(list + qHead, elem); |
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WriteMacInt32(list + qTail, elem); |
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} else { |
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WriteMacInt32(ReadMacInt32(list + qTail) + qLink, elem); |
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WriteMacInt32(list + qTail, elem); |
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} |
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} |
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/* |
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* Find first free drive number, starting at num |
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*/ |
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static bool is_drive_number_free(int num) |
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{ |
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uint32 e = ReadMacInt32(0x308 + qHead); |
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while (e) { |
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uint32 d = e - dsQLink; |
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if (ReadMacInt16(d + dsQDrive) == num) |
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return false; |
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e = ReadMacInt32(e + qLink); |
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} |
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return true; |
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} |
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int FindFreeDriveNumber(int num) |
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{ |
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while (!is_drive_number_free(num)) |
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num++; |
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return num; |
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} |
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/* |
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* Mount volume with given file handle (call this function when you are unable to |
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* do automatic media change detection and the user has to press a special key |
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* or something to mount a volume; this function will check if there's really a |
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* volume in the drive with SysIsDiskInserted(); volumes which are present on startup |
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* are automatically mounted) |
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*/ |
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void MountVolume(void *fh) |
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{ |
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SonyMountVolume(fh) || DiskMountVolume(fh) || CDROMMountVolume(fh); |
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} |
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/* |
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* Test if basic MacOS initializations (of the ROM) are done |
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*/ |
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bool HasMacStarted(void) |
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{ |
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return ReadMacInt32(0xcfc) == 'WLSC'; // Mac warm start flag |
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} |
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/* |
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* Calculate disk image file layout given file size and first 256 data bytes |
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*/ |
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void FileDiskLayout(loff_t size, uint8 *data, loff_t &start_byte, loff_t &real_size) |
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{ |
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if (size == 419284 || size == 838484) { |
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// 400K/800K DiskCopy image, 84 byte header |
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start_byte = 84; |
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real_size = (size - 84) & ~0x1ff; |
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} else { |
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// 0..511 byte header |
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start_byte = size & 0x1ff; |
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real_size = size - start_byte; |
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} |
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} |
