mirror of
https://github.com/kanjitalk755/macemu.git
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125 lines
2.9 KiB
C++
125 lines
2.9 KiB
C++
/*
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* macos_util.cpp - MacOS definitions/utility functions
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*
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* Basilisk II (C) 1997-2001 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 "adb.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 EnqueueMac(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 ((int)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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* 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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}
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uint32 DebugUtil(uint32 Selector)
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{
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switch (Selector)
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{
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case duDebuggerGetMax:
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return 3;
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case duDebuggerEnter:
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return 0;
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case duDebuggerExit:
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return 0;
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case duDebuggerPoll:
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ADBInterrupt();
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return 0;
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default:
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return (uint32) paramErr;
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}
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}
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