| 1 |
/* |
| 2 |
* macos_util.cpp - MacOS definitions/utility functions |
| 3 |
* |
| 4 |
* Basilisk II (C) 1997-2000 Christian Bauer |
| 5 |
* |
| 6 |
* This program is free software; you can redistribute it and/or modify |
| 7 |
* it under the terms of the GNU General Public License as published by |
| 8 |
* the Free Software Foundation; either version 2 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 |
*/ |
| 20 |
|
| 21 |
#include "sysdeps.h" |
| 22 |
#include "cpu_emulation.h" |
| 23 |
#include "adb.h" |
| 24 |
#include "main.h" |
| 25 |
#include "sony.h" |
| 26 |
#include "disk.h" |
| 27 |
#include "cdrom.h" |
| 28 |
#include "macos_util.h" |
| 29 |
|
| 30 |
#define DEBUG 0 |
| 31 |
#include "debug.h" |
| 32 |
|
| 33 |
|
| 34 |
/* |
| 35 |
* Enqueue QElem to list |
| 36 |
*/ |
| 37 |
|
| 38 |
void EnqueueMac(uint32 elem, uint32 list) |
| 39 |
{ |
| 40 |
WriteMacInt32(elem + qLink, 0); |
| 41 |
if (!ReadMacInt32(list + qTail)) { |
| 42 |
WriteMacInt32(list + qHead, elem); |
| 43 |
WriteMacInt32(list + qTail, elem); |
| 44 |
} else { |
| 45 |
WriteMacInt32(ReadMacInt32(list + qTail) + qLink, elem); |
| 46 |
WriteMacInt32(list + qTail, elem); |
| 47 |
} |
| 48 |
} |
| 49 |
|
| 50 |
|
| 51 |
/* |
| 52 |
* Find first free drive number, starting at num |
| 53 |
*/ |
| 54 |
|
| 55 |
static bool is_drive_number_free(int num) |
| 56 |
{ |
| 57 |
uint32 e = ReadMacInt32(0x308 + qHead); |
| 58 |
while (e) { |
| 59 |
uint32 d = e - dsQLink; |
| 60 |
if ((int)ReadMacInt16(d + dsQDrive) == num) |
| 61 |
return false; |
| 62 |
e = ReadMacInt32(e + qLink); |
| 63 |
} |
| 64 |
return true; |
| 65 |
} |
| 66 |
|
| 67 |
int FindFreeDriveNumber(int num) |
| 68 |
{ |
| 69 |
while (!is_drive_number_free(num)) |
| 70 |
num++; |
| 71 |
return num; |
| 72 |
} |
| 73 |
|
| 74 |
|
| 75 |
/* |
| 76 |
* Mount volume with given file handle (call this function when you are unable to |
| 77 |
* do automatic media change detection and the user has to press a special key |
| 78 |
* or something to mount a volume; this function will check if there's really a |
| 79 |
* volume in the drive with SysIsDiskInserted(); volumes which are present on startup |
| 80 |
* are automatically mounted) |
| 81 |
*/ |
| 82 |
|
| 83 |
void MountVolume(void *fh) |
| 84 |
{ |
| 85 |
SonyMountVolume(fh) || DiskMountVolume(fh) || CDROMMountVolume(fh); |
| 86 |
} |
| 87 |
|
| 88 |
|
| 89 |
/* |
| 90 |
* Calculate disk image file layout given file size and first 256 data bytes |
| 91 |
*/ |
| 92 |
|
| 93 |
void FileDiskLayout(loff_t size, uint8 *data, loff_t &start_byte, loff_t &real_size) |
| 94 |
{ |
| 95 |
if (size == 419284 || size == 838484) { |
| 96 |
// 400K/800K DiskCopy image, 84 byte header |
| 97 |
start_byte = 84; |
| 98 |
real_size = (size - 84) & ~0x1ff; |
| 99 |
} else { |
| 100 |
// 0..511 byte header |
| 101 |
start_byte = size & 0x1ff; |
| 102 |
real_size = size - start_byte; |
| 103 |
} |
| 104 |
} |
| 105 |
|
| 106 |
|
| 107 |
uint32 DebugUtil(uint32 Selector) |
| 108 |
{ |
| 109 |
switch (Selector) |
| 110 |
{ |
| 111 |
case duDebuggerGetMax: |
| 112 |
return 3; |
| 113 |
case duDebuggerEnter: |
| 114 |
return 0; |
| 115 |
case duDebuggerExit: |
| 116 |
return 0; |
| 117 |
case duDebuggerPoll: |
| 118 |
ADBInterrupt(); |
| 119 |
return 0; |
| 120 |
default: |
| 121 |
return (uint32) paramErr; |
| 122 |
} |
| 123 |
} |
| 124 |
|
