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AmigActive 6
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AACD06.ISO
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AACD
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Emulation
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BasiliskII
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src
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macos_util.cpp
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C/C++ Source or Header
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1999-10-19
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3KB
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114 lines
/*
* macos_util.cpp - MacOS definitions/utility functions
*
* Basilisk II (C) 1997-1999 Christian Bauer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "sysdeps.h"
#include "cpu_emulation.h"
#include "main.h"
#include "sony.h"
#include "disk.h"
#include "cdrom.h"
#include "macos_util.h"
#define DEBUG 0
#include "debug.h"
/*
* Enqueue QElem to list
*/
void EnqueueMac(uint32 elem, uint32 list)
{
WriteMacInt32(elem + qLink, 0);
if (!ReadMacInt32(list + qTail)) {
WriteMacInt32(list + qHead, elem);
WriteMacInt32(list + qTail, elem);
} else {
WriteMacInt32(ReadMacInt32(list + qTail) + qLink, elem);
WriteMacInt32(list + qTail, elem);
}
}
/*
* Find first free drive number, starting at num
*/
static bool is_drive_number_free(int num)
{
uint32 e = ReadMacInt32(0x308 + qHead);
while (e) {
uint32 d = e - dsQLink;
if ((int)ReadMacInt16(d + dsQDrive) == num)
return false;
e = ReadMacInt32(e + qLink);
}
return true;
}
int FindFreeDriveNumber(int num)
{
while (!is_drive_number_free(num))
num++;
return num;
}
/*
* Mount volume with given file handle (call this function when you are unable to
* do automatic media change detection and the user has to press a special key
* or something to mount a volume; this function will check if there's really a
* volume in the drive with SysIsDiskInserted(); volumes which are present on startup
* are automatically mounted)
*/
void MountVolume(void *fh)
{
SonyMountVolume(fh) || DiskMountVolume(fh) || CDROMMountVolume(fh);
}
/*
* Test if basic MacOS initializations (of the ROM) are done
*/
bool HasMacStarted(void)
{
return ReadMacInt32(0xcfc) == 'WLSC'; // Mac warm start flag
}
/*
* Calculate disk image file layout given file size and first 256 data bytes
*/
void FileDiskLayout(loff_t size, uint8 *data, loff_t &start_byte, loff_t &real_size)
{
if (size == 419284 || size == 838484) {
// 400K/800K DiskCopy image, 84 byte header
start_byte = 84;
real_size = (size - 84) & ~0x1ff;
} else {
// 0..511 byte header
start_byte = size & 0x1ff;
real_size = size - start_byte;
}
}