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/*
ROM / OS loader, EmuTOS
ARAnyM (C) 2005-2006 Patrice Mandin
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 "bootos_emutos.h"
#include "aranym_exception.h"
#include "emul_op.h"
#define DEBUG 0
#include "debug.h"
/* EmuTOS ROM class */
EmutosBootOs::EmutosBootOs(void) ARANYM_THROWS(AranymException)
{
emutos_patch(true);
}
/*--- Private functions ---*/
void EmutosBootOs::emutos_patch(bool cold) ARANYM_THROWS(AranymException)
{
if (strlen(bx_options.tos.emutos_path) == 0)
throw AranymException("Path to EmuTOS ROM image file undefined");
load(bx_options.tos.emutos_path);
init(cold);
infoprint("EmuTOS %02x%02x/%02x/%02x loading from '%s'... [OK]",
ROMBaseHost[0x1a], ROMBaseHost[0x1b],
ROMBaseHost[0x18], ROMBaseHost[0x19],
bx_options.tos.emutos_path
);
int found = 0;
for (int ptr = 0; ptr < 0x10000; ptr += 2)
{
if (ROMBaseHost[ptr + 0] == 0x3f && /* move.w #-1,-(a7) */
ROMBaseHost[ptr + 1] == 0x3c &&
ROMBaseHost[ptr + 2] == 0xff &&
ROMBaseHost[ptr + 3] == 0xff &&
ROMBaseHost[ptr + 4] == 0x4e && /* jsr _kbshift */
ROMBaseHost[ptr + 5] == 0xb9 &&
ROMBaseHost[ptr + 6] == 0x00 &&
ROMBaseHost[ptr + 7] == 0xe0 &&
ROMBaseHost[ptr + 10] == 0x54 && /* addq.l #2,a7 */
ROMBaseHost[ptr + 11] == 0x8f &&
((ROMBaseHost[ptr + 12] == 0x08 && /* btst #3,d0 */
ROMBaseHost[ptr + 13] == 0x00 &&
ROMBaseHost[ptr + 14] == 0x00 &&
ROMBaseHost[ptr + 15] == 0x03) ||
(ROMBaseHost[ptr + 12] == 0x44 &&
ROMBaseHost[ptr + 13] == 0xc0 &&
ROMBaseHost[ptr + 14] == 0x6b &&
ROMBaseHost[ptr + 15] == 0x14)))
{
D(bug("blkdev_hdv_boot 1 found at %08x", ptr + ROMBase));
ROMBaseHost[ptr + 0] = 0x48; // movem.l d1-d2/a0-a2,-(a7)
ROMBaseHost[ptr + 1] = 0xe7;
ROMBaseHost[ptr + 2] = 0x60;
ROMBaseHost[ptr + 3] = 0xe0;
ROMBaseHost[ptr + 4] = 0xa0; // Linea_init
ROMBaseHost[ptr + 5] = 0x00;
ROMBaseHost[ptr + 6] = M68K_EMUL_INIT >> 8;
ROMBaseHost[ptr + 7] = M68K_EMUL_INIT & 0xff;
ROMBaseHost[ptr + 8] = 0x4c; // movem.l (a7)+,d1-d2/a0-a2
ROMBaseHost[ptr + 9] = 0xdf;
ROMBaseHost[ptr + 10] = 0x07;
ROMBaseHost[ptr + 11] = 0x06;
ROMBaseHost[ptr + 12] = 0x70; // moveq #0,d0
ROMBaseHost[ptr + 13] = 0x00;
ROMBaseHost[ptr + 14] = 0x4e; // nop
ROMBaseHost[ptr + 15] = 0x71;
found++;
} else if (
ROMBaseHost[ptr + 0] == 0x08 && /* btst #1,d0 */
ROMBaseHost[ptr + 1] == 0x00 &&
ROMBaseHost[ptr + 2] == 0x00 &&
ROMBaseHost[ptr + 3] == 0x01 &&
ROMBaseHost[ptr + 4] == 0x67 && /* beq *+6 */
ROMBaseHost[ptr + 5] == 0x06 &&
ROMBaseHost[ptr + 6] == 0x42 && /* clr.w _bootdev */
ROMBaseHost[ptr + 7] == 0x79 &&
ROMBaseHost[ptr + 8] == 0x00 &&
ROMBaseHost[ptr + 9] == 0x00 &&
ROMBaseHost[ptr + 10] == 0x04 &&
ROMBaseHost[ptr + 11] == 0x46)
{
D(bug("blkdev_hdv_boot 2 found at %08x", ptr + ROMBase));
ROMBaseHost[ptr + 0] = 0x48; // movem.l d1-d2/a0-a2,-(a7)
ROMBaseHost[ptr + 1] = 0xe7;
ROMBaseHost[ptr + 2] = 0x60;
ROMBaseHost[ptr + 3] = 0xe0;
ROMBaseHost[ptr + 4] = 0xa0; // Linea_init
ROMBaseHost[ptr + 5] = 0x00;
ROMBaseHost[ptr + 6] = M68K_EMUL_INIT >> 8;
ROMBaseHost[ptr + 7] = M68K_EMUL_INIT & 0xff;
ROMBaseHost[ptr + 8] = 0x4c; // movem.l (a7)+,d1-d2/a0-a2
ROMBaseHost[ptr + 9] = 0xdf;
ROMBaseHost[ptr + 10] = 0x07;
ROMBaseHost[ptr + 11] = 0x06;
ROMBaseHost[ptr + 12] = 0x70; // moveq #0,d0
ROMBaseHost[ptr + 13] = 0x00;
ROMBaseHost[ptr + 14] = 0x4e; // nop
ROMBaseHost[ptr + 15] = 0x71;
found++;
}
}
if (found == 0)
{
bug("EmutosBootOs: blkdev_hdv_boot not found!");
} else if (found > 1)
{
bug("EmutosBootOs: blkdev_hdv_boot found %d times!", found);
}
}
/* vim:ts=4:sw=4
*/
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