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- implementation of the function READ TOC for cdrom image files

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This commit is contained in:
Volker Ruppert 2002-07-30 06:25:57 +00:00
parent 6ed15ec0ad
commit 92f54faa01
1 changed files with 55 additions and 4 deletions
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59
bochs/iodev/cdrom.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: cdrom.cc,v 1.35 2002-07-29 16:42:01 vruppert Exp $
// $Id: cdrom.cc,v 1.36 2002-07-30 06:25:57 vruppert Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
@ -210,7 +210,7 @@ cdrom_interface::cdrom_interface(char *dev)
void
cdrom_interface::init(void) {
BX_DEBUG(("Init $Id: cdrom.cc,v 1.35 2002-07-29 16:42:01 vruppert Exp $"));
BX_DEBUG(("Init $Id: cdrom.cc,v 1.36 2002-07-30 06:25:57 vruppert Exp $"));
BX_INFO(("file = '%s'",path));
}
@ -410,8 +410,59 @@ cdrom_interface::read_toc(uint8* buf, int* length, bool msf, int start_track)
}
if (using_file) {
BX_ERROR (("WARNING: read_toc on a file is not implemented, just returning length=1"));
*length = 1;
if ((start_track != 1) && (start_track != 0xaa))
return false;
buf[2] = 1;
buf[3] = 1;
int len = 4;
if (start_track == 1) {
buf[len++] = 0; // Reserved
buf[len++] = 0x14; // ADR, control
buf[len++] = 1; // Track number
buf[len++] = 0; // Reserved
// Start address
if (msf) {
buf[len++] = 0; // reserved
buf[len++] = 0; // minute
buf[len++] = 2; // second
buf[len++] = 0; // frame
} else {
buf[len++] = 0;
buf[len++] = 0;
buf[len++] = 0;
buf[len++] = 0; // logical sector 0
}
}
// Lead out track
buf[len++] = 0; // Reserved
buf[len++] = 0x16; // ADR, control
buf[len++] = 0xaa; // Track number
buf[len++] = 0; // Reserved
uint32 blocks = capacity();
// Start address
if (msf) {
buf[len++] = 0; // reserved
buf[len++] = (uint8)(((blocks + 150) / 75) / 60); // minute
buf[len++] = (uint8)(((blocks + 150) / 75) % 60); // second
buf[len++] = (uint8)((blocks + 150) % 75); // frame;
} else {
buf[len++] = (blocks >> 24) & 0xff;
buf[len++] = (blocks >> 16) & 0xff;
buf[len++] = (blocks >> 8) & 0xff;
buf[len++] = (blocks >> 0) & 0xff;
}
buf[0] = ((len-2) >> 8) & 0xff;
buf[1] = (len-2) & 0xff;
*length = len;
return true;
}
// all these implementations below are the platform-dependent code required