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macemu/BasiliskII/src/rom_patches.cpp
gbeauche 30632aed4f Happy New Year!
2005-01-30 21:42:16 +00:00

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/*
* rom_patches.cpp - ROM patches
*
* Basilisk II (C) 1997-2005 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 <string.h>
#include "sysdeps.h"
#include "cpu_emulation.h"
#include "main.h"
#include "emul_op.h"
#include "macos_util.h"
#include "slot_rom.h"
#include "sony.h"
#include "disk.h"
#include "cdrom.h"
#include "video.h"
#include "extfs.h"
#include "prefs.h"
#include "rom_patches.h"
#define DEBUG 0
#include "debug.h"
// Global variables
uint32 UniversalInfo; // ROM offset of UniversalInfo
uint32 PutScrapPatch; // Mac address of PutScrap() patch
uint32 GetScrapPatch = 0; // Mac address of GetScrap() patch
uint32 ROMBreakpoint = 0; // ROM offset of breakpoint (0 = disabled, 0x2310 = CritError)
bool PrintROMInfo = false; // Flag: print ROM information in PatchROM()
bool PatchHWBases = true; // Flag: patch hardware base addresses
static uint32 sony_offset; // ROM offset of .Sony driver
static uint32 serd_offset; // ROM offset of SERD resource (serial drivers)
static uint32 microseconds_offset; // ROM offset of Microseconds() replacement routine
static uint32 debugutil_offset; // ROM offset of DebugUtil() replacement routine
// Prototypes
uint16 ROMVersion;
/*
* Macros used to extract one of the 16-bit words from a 32-bit word value
*/
#define HiWord(X) (((X) >> 16) & 0xffff)
#define LoWord(X) ((X) & 0xffff)
/*
* Search ROM for byte string, return ROM offset (or 0)
*/
static uint32 find_rom_data(uint32 start, uint32 end, const uint8 *data, uint32 data_len)
{
uint32 ofs = start;
while (ofs < end) {
if (!memcmp((void *)(ROMBaseHost + ofs), data, data_len))
return ofs;
ofs++;
}
return 0;
}
/*
* Search ROM resource by type/ID, return ROM offset of resource data
*/
static uint32 rsrc_ptr = 0;
static uint32 find_rom_resource(uint32 s_type, int16 s_id, bool cont = false)
{
uint32 lp = ROMBaseMac + ReadMacInt32(ROMBaseMac + 0x1a);
uint32 x = ReadMacInt32(lp);
if (!cont)
rsrc_ptr = x;
else
rsrc_ptr = ReadMacInt32(ROMBaseMac + rsrc_ptr + 8);
for (;;) {
lp = ROMBaseMac + rsrc_ptr;
uint32 data = ReadMacInt32(lp + 12);
uint32 type = ReadMacInt32(lp + 16);
int16 id = ReadMacInt16(lp + 20);
if (type == s_type && id == s_id)
return data;
rsrc_ptr = ReadMacInt32(lp + 8);
if (!rsrc_ptr)
break;
}
return 0;
}
/*
* Search offset of A-Trap routine in ROM
*/
static uint32 find_rom_trap(uint16 trap)
{
uint8 *bp = (uint8 *)(ROMBaseHost + ReadMacInt32(ROMBaseMac + 0x22));
uint16 rom_trap = 0xa800;
uint32 ofs = 0;
again:
for (int i=0; i<0x400; i++) {
bool unimplemented = false;
uint8 b = *bp++;
if (b == 0x80) // Unimplemented trap
unimplemented = true;
else if (b == 0xff) { // Absolute address
ofs = (bp[0] << 24) | (bp[1] << 16) | (bp[2] << 8) | bp[3];
bp += 4;
} else if (b & 0x80) { // 1 byte offset
int16 add = (b & 0x7f) << 1;
if (!add)
return 0;
ofs += add;
} else { // 2 byte offset
int16 add = ((b << 8) | *bp++) << 1;
if (!add)
return 0;
ofs += add;
}
if (rom_trap == trap)
return unimplemented ? 0 : ofs;
rom_trap++;
}
rom_trap = 0xa000;
goto again;
}
/*
* Print ROM information to stream,
*/
static void list_rom_resources(void)
{
printf("ROM Resources:\n");
printf("Offset\t Type\tID\tSize\tName\n");
printf("------------------------------------------------\n");
uint32 lp = ROMBaseMac + ReadMacInt32(ROMBaseMac + 0x1a);
uint32 rsrc_ptr = ReadMacInt32(lp);
for (;;) {
lp = ROMBaseMac + rsrc_ptr;
uint32 data = ReadMacInt32(lp + 12);
char name[32];
int name_len = ReadMacInt8(lp + 23), i;
for (i=0; i<name_len; i++)
name[i] = ReadMacInt8(lp + 24 + i);
name[i] = 0;
printf("%08x %c%c%c%c\t%d\t%d\t%s\n", data, ReadMacInt8(lp + 16), ReadMacInt8(lp + 17), ReadMacInt8(lp + 18), ReadMacInt8(lp + 19), ReadMacInt16(lp + 20), ReadMacInt32(ROMBaseMac + data - 8), name);
rsrc_ptr = ReadMacInt32(lp + 8);
if (!rsrc_ptr)
break;
}
printf("\n");
}
// Mapping of Model IDs to Model names
struct mac_desc {
char *name;
int32 id;
};
static mac_desc MacDesc[] = {
{"Classic" , 1},
{"Mac XL" , 2},
{"Mac 512KE" , 3},
{"Mac Plus" , 4},
{"Mac SE" , 5},
{"Mac II" , 6},
{"Mac IIx" , 7},
{"Mac IIcx" , 8},
{"Mac SE/030" , 9},
{"Mac Portable" , 10},
{"Mac IIci" , 11},
{"Mac IIfx" , 13},
{"Mac Classic" , 17},
{"Mac IIsi" , 18},
{"Mac LC" , 19},
{"Quadra 900" , 20},
{"PowerBook 170" , 21},
{"Quadra 700" , 22},
{"Classic II" , 23},
{"PowerBook 100" , 24},
{"PowerBook 140" , 25},
{"Quadra 950" , 26},
{"Mac LCIII/Performa 450", 27},
{"PowerBook Duo 210" , 29},
{"Centris 650" , 30},
{"PowerBook Duo 230" , 32},
{"PowerBook 180" , 33},
{"PowerBook 160" , 34},
{"Quadra 800" , 35},
{"Quadra 650" , 36},
{"Mac LCII" , 37},
{"PowerBook Duo 250" , 38},
{"Mac IIvi" , 44},
{"Mac IIvm/Performa 600", 45},
{"Mac IIvx" , 48},
{"Color Classic/Performa 250", 49},
{"PowerBook 165c" , 50},
{"Centris 610" , 52},
{"Quadra 610" , 53},
{"PowerBook 145" , 54},
{"Mac LC520" , 56},
{"Quadra/Centris 660AV" , 60},
{"Performa 46x" , 62},
{"PowerBook 180c" , 71},
{"PowerBook 520/520c/540/540c", 72},
{"PowerBook Duo 270c" , 77},
{"Quadra 840AV" , 78},
{"Performa 550" , 80},
{"PowerBook 165" , 84},
{"PowerBook 190" , 85},
{"Mac TV" , 88},
{"Mac LC475/Performa 47x", 89},
{"Mac LC575" , 92},
{"Quadra 605" , 94},
{"Quadra 630" , 98},
{"Mac LC580" , 99},
{"PowerBook Duo 280" , 102},
{"PowerBook Duo 280c" , 103},
{"PowerBook 150" , 115},
{"unknown", -1}
};
static void print_universal_info(uint32 info)
{
uint8 id = ReadMacInt8(info + 18);
uint16 hwcfg = ReadMacInt16(info + 16);
uint16 rom85 = ReadMacInt16(info + 20);
// Find model name
char *name = "unknown";
for (int i=0; MacDesc[i].id >= 0; i++)
if (MacDesc[i].id == id + 6) {
name = MacDesc[i].name;
break;
}
printf("%08x %02x\t%04x\t%04x\t%s\n", info - ROMBaseMac, id, hwcfg, rom85, name);
}
static void list_universal_infos(void)
{
uint32 ofs = 0x3000;
for (int i=0; i<0x2000; i+=2, ofs+=2)
if (ReadMacInt32(ROMBaseMac + ofs) == 0xdc000505) {
ofs -= 16;
uint32 q;
for (q=ofs; q > 0 && ReadMacInt32(ROMBaseMac + q) != ofs - q; q-=4) ;
if (q > 0) {
printf("Universal Table at %08x:\n", q);
printf("Offset\t ID\tHWCfg\tROM85\tModel\n");
printf("------------------------------------------------\n");
while ((ofs = ReadMacInt32(ROMBaseMac + q))) {
print_universal_info(ROMBaseMac + ofs + q);
q += 4;
}
}
break;
}
printf("\n");
}
static void print_rom_info(void)
{
printf("\nROM Info:\n");
printf("Checksum : %08x\n", ReadMacInt32(ROMBaseMac));
printf("Version : %04x\n", ROMVersion);
printf("Sub Version : %04x\n", ReadMacInt16(ROMBaseMac + 18));
printf("Resource Map: %08x\n", ReadMacInt32(ROMBaseMac + 26));
printf("Trap Tables : %08x\n\n", ReadMacInt32(ROMBaseMac + 34));
if (ROMVersion == ROM_VERSION_32) {
list_rom_resources();
list_universal_infos();
}
}
/*
* Driver stubs
*/
static const uint8 sony_driver[] = { // Replacement for .Sony driver
// Driver header
SonyDriverFlags >> 8, SonyDriverFlags & 0xff, 0, 0, 0, 0, 0, 0,
0x00, 0x18, // Open() offset
0x00, 0x1c, // Prime() offset
0x00, 0x20, // Control() offset
0x00, 0x2c, // Status() offset
0x00, 0x52, // Close() offset
0x05, 0x2e, 0x53, 0x6f, 0x6e, 0x79, // ".Sony"
// Open()
M68K_EMUL_OP_SONY_OPEN >> 8, M68K_EMUL_OP_SONY_OPEN & 0xff,
0x4e, 0x75, // rts
// Prime()
M68K_EMUL_OP_SONY_PRIME >> 8, M68K_EMUL_OP_SONY_PRIME & 0xff,
0x60, 0x0e, // bra IOReturn
// Control()
M68K_EMUL_OP_SONY_CONTROL >> 8, M68K_EMUL_OP_SONY_CONTROL & 0xff,
0x0c, 0x68, 0x00, 0x01, 0x00, 0x1a, // cmp.w #1,$1a(a0)
0x66, 0x04, // bne IOReturn
0x4e, 0x75, // rts
// Status()
M68K_EMUL_OP_SONY_STATUS >> 8, M68K_EMUL_OP_SONY_STATUS & 0xff,
// IOReturn
0x32, 0x28, 0x00, 0x06, // move.w 6(a0),d1
0x08, 0x01, 0x00, 0x09, // btst #9,d1
0x67, 0x0c, // beq 1
0x4a, 0x40, // tst.w d0
0x6f, 0x02, // ble 2
0x42, 0x40, // clr.w d0
0x31, 0x40, 0x00, 0x10, //2 move.w d0,$10(a0)
0x4e, 0x75, // rts
0x4a, 0x40, //1 tst.w d0
0x6f, 0x04, // ble 3
0x42, 0x40, // clr.w d0
0x4e, 0x75, // rts
0x2f, 0x38, 0x08, 0xfc, //3 move.l $8fc,-(sp)
0x4e, 0x75, // rts
// Close()
0x70, 0xe8, // moveq #-24,d0
0x4e, 0x75 // rts
};
static const uint8 disk_driver[] = { // Generic disk driver
// Driver header
DiskDriverFlags >> 8, DiskDriverFlags & 0xff, 0, 0, 0, 0, 0, 0,
0x00, 0x18, // Open() offset
0x00, 0x1c, // Prime() offset
0x00, 0x20, // Control() offset
0x00, 0x2c, // Status() offset
0x00, 0x52, // Close() offset
0x05, 0x2e, 0x44, 0x69, 0x73, 0x6b, // ".Disk"
// Open()
M68K_EMUL_OP_DISK_OPEN >> 8, M68K_EMUL_OP_DISK_OPEN & 0xff,
0x4e, 0x75, // rts
// Prime()
M68K_EMUL_OP_DISK_PRIME >> 8, M68K_EMUL_OP_DISK_PRIME & 0xff,
0x60, 0x0e, // bra IOReturn
// Control()
M68K_EMUL_OP_DISK_CONTROL >> 8, M68K_EMUL_OP_DISK_CONTROL & 0xff,
0x0c, 0x68, 0x00, 0x01, 0x00, 0x1a, // cmp.w #1,$1a(a0)
0x66, 0x04, // bne IOReturn
0x4e, 0x75, // rts
// Status()
M68K_EMUL_OP_DISK_STATUS >> 8, M68K_EMUL_OP_DISK_STATUS & 0xff,
// IOReturn
0x32, 0x28, 0x00, 0x06, // move.w 6(a0),d1
0x08, 0x01, 0x00, 0x09, // btst #9,d1
0x67, 0x0c, // beq 1
0x4a, 0x40, // tst.w d0
0x6f, 0x02, // ble 2
0x42, 0x40, // clr.w d0
0x31, 0x40, 0x00, 0x10, //2 move.w d0,$10(a0)
0x4e, 0x75, // rts
0x4a, 0x40, //1 tst.w d0
0x6f, 0x04, // ble 3
0x42, 0x40, // clr.w d0
0x4e, 0x75, // rts
0x2f, 0x38, 0x08, 0xfc, //3 move.l $8fc,-(sp)
0x4e, 0x75, // rts
// Close()
0x70, 0xe8, // moveq #-24,d0
0x4e, 0x75 // rts
};
static const uint8 cdrom_driver[] = { // CD-ROM driver
// Driver header
CDROMDriverFlags >> 8, CDROMDriverFlags & 0xff, 0, 0, 0, 0, 0, 0,
0x00, 0x1c, // Open() offset
0x00, 0x20, // Prime() offset
0x00, 0x24, // Control() offset
0x00, 0x30, // Status() offset
0x00, 0x56, // Close() offset
0x08, 0x2e, 0x41, 0x70, 0x70, 0x6c, 0x65, 0x43, 0x44, 0x00, // ".AppleCD"
// Open()
M68K_EMUL_OP_CDROM_OPEN >> 8, M68K_EMUL_OP_CDROM_OPEN & 0xff,
0x4e, 0x75, // rts
// Prime()
M68K_EMUL_OP_CDROM_PRIME >> 8, M68K_EMUL_OP_CDROM_PRIME & 0xff,
0x60, 0x0e, // bra IOReturn
// Control()
M68K_EMUL_OP_CDROM_CONTROL >> 8, M68K_EMUL_OP_CDROM_CONTROL & 0xff,
0x0c, 0x68, 0x00, 0x01, 0x00, 0x1a, // cmp.w #1,$1a(a0)
0x66, 0x04, // bne IOReturn
0x4e, 0x75, // rts
// Status()
M68K_EMUL_OP_CDROM_STATUS >> 8, M68K_EMUL_OP_CDROM_STATUS & 0xff,
// IOReturn
0x32, 0x28, 0x00, 0x06, // move.w 6(a0),d1
0x08, 0x01, 0x00, 0x09, // btst #9,d1
0x67, 0x0c, // beq 1
0x4a, 0x40, // tst.w d0
0x6f, 0x02, // ble 2
0x42, 0x40, // clr.w d0
0x31, 0x40, 0x00, 0x10, //2 move.w d0,$10(a0)
0x4e, 0x75, // rts
0x4a, 0x40, //1 tst.w d0
0x6f, 0x04, // ble 3
0x42, 0x40, // clr.w d0
0x4e, 0x75, // rts
0x2f, 0x38, 0x08, 0xfc, //3 move.l $8fc,-(sp)
0x4e, 0x75, // rts
// Close()
0x70, 0xe8, // moveq #-24,d0
0x4e, 0x75 // rts
};
static const uint8 ain_driver[] = { // .AIn driver header
// Driver header
0x4d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x18, // Open() offset
0x00, 0x1e, // Prime() offset
0x00, 0x24, // Control() offset
0x00, 0x32, // Status() offset
0x00, 0x38, // Close() offset
0x04, 0x2e, 0x41, 0x49, 0x6e, 0x09, // ".AIn",9
// Open()
0x70, 0x00, // moveq #0,d0
M68K_EMUL_OP_SERIAL_OPEN >> 8, M68K_EMUL_OP_SERIAL_OPEN & 0xff,
0x4e, 0x75, // rts
// Prime()
0x70, 0x00, // moveq #0,d0
M68K_EMUL_OP_SERIAL_PRIME >> 8, M68K_EMUL_OP_SERIAL_PRIME & 0xff,
0x60, 0x1a, // bra IOReturn
// Control()
0x70, 0x00, // moveq #0,d0
M68K_EMUL_OP_SERIAL_CONTROL >> 8, M68K_EMUL_OP_SERIAL_CONTROL & 0xff,
0x0c, 0x68, 0x00, 0x01, 0x00, 0x1a, // cmp.w #1,$1a(a0)
0x66, 0x0e, // bne IOReturn
0x4e, 0x75, // rts
// Status()
0x70, 0x00, // moveq #0,d0
M68K_EMUL_OP_SERIAL_STATUS >> 8, M68K_EMUL_OP_SERIAL_STATUS & 0xff,
0x60, 0x06, // bra IOReturn
// Close()
0x70, 0x00, // moveq #0,d0
M68K_EMUL_OP_SERIAL_CLOSE >> 8, M68K_EMUL_OP_SERIAL_CLOSE & 0xff,
0x4e, 0x75, // rts
// IOReturn
0x32, 0x28, 0x00, 0x06, // move.w 6(a0),d1
0x08, 0x01, 0x00, 0x09, // btst #9,d1
0x67, 0x0c, // beq 1
0x4a, 0x40, // tst.w d0
0x6f, 0x02, // ble 2
0x42, 0x40, // clr.w d0
0x31, 0x40, 0x00, 0x10, //2 move.w d0,$10(a0)
0x4e, 0x75, // rts
0x4a, 0x40, //1 tst.w d0
0x6f, 0x04, // ble 3
0x42, 0x40, // clr.w d0
0x4e, 0x75, // rts
0x2f, 0x38, 0x08, 0xfc, //3 move.l $8fc,-(a7)
0x4e, 0x75, // rts
};
static const uint8 aout_driver[] = { // .AOut driver header
// Driver header
0x4e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x1a, // Open() offset
0x00, 0x20, // Prime() offset
0x00, 0x26, // Control() offset
0x00, 0x34, // Status() offset
0x00, 0x3a, // Close() offset
0x05, 0x2e, 0x41, 0x4f, 0x75, 0x74, 0x09, 0x00, // ".AOut",9
// Open()
0x70, 0x01, // moveq #1,d0
M68K_EMUL_OP_SERIAL_OPEN >> 8, M68K_EMUL_OP_SERIAL_OPEN & 0xff,
0x4e, 0x75, // rts
// Prime()
0x70, 0x01, // moveq #1,d0
M68K_EMUL_OP_SERIAL_PRIME >> 8, M68K_EMUL_OP_SERIAL_PRIME & 0xff,
0x60, 0x1a, // bra IOReturn
// Control()
0x70, 0x01, // moveq #1,d0
M68K_EMUL_OP_SERIAL_CONTROL >> 8, M68K_EMUL_OP_SERIAL_CONTROL & 0xff,
0x0c, 0x68, 0x00, 0x01, 0x00, 0x1a, // cmp.w #1,$1a(a0)
0x66, 0x0e, // bne IOReturn
0x4e, 0x75, // rts
// Status()
0x70, 0x01, // moveq #1,d0
M68K_EMUL_OP_SERIAL_STATUS >> 8, M68K_EMUL_OP_SERIAL_STATUS & 0xff,
0x60, 0x06, // bra IOReturn
// Close()
0x70, 0x01, // moveq #1,d0
M68K_EMUL_OP_SERIAL_CLOSE >> 8, M68K_EMUL_OP_SERIAL_CLOSE & 0xff,
0x4e, 0x75, // rts
// IOReturn
0x32, 0x28, 0x00, 0x06, // move.w 6(a0),d1
0x08, 0x01, 0x00, 0x09, // btst #9,d1
0x67, 0x0c, // beq 1
0x4a, 0x40, // tst.w d0
0x6f, 0x02, // ble 2
0x42, 0x40, // clr.w d0
0x31, 0x40, 0x00, 0x10, //2 move.w d0,$10(a0)
0x4e, 0x75, // rts
0x4a, 0x40, //1 tst.w d0
0x6f, 0x04, // ble 3
0x42, 0x40, // clr.w d0
0x4e, 0x75, // rts
0x2f, 0x38, 0x08, 0xfc, //3 move.l $8fc,-(a7)
0x4e, 0x75, // rts
};
static const uint8 bin_driver[] = { // .BIn driver header
// Driver header
0x4d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x18, // Open() offset
0x00, 0x1e, // Prime() offset
0x00, 0x24, // Control() offset
0x00, 0x32, // Status() offset
0x00, 0x38, // Close() offset
0x04, 0x2e, 0x42, 0x49, 0x6e, 0x09, // ".BIn",9
// Open()
0x70, 0x02, // moveq #2,d0
M68K_EMUL_OP_SERIAL_OPEN >> 8, M68K_EMUL_OP_SERIAL_OPEN & 0xff,
0x4e, 0x75, // rts
// Prime()
0x70, 0x02, // moveq #2,d0
M68K_EMUL_OP_SERIAL_PRIME >> 8, M68K_EMUL_OP_SERIAL_PRIME & 0xff,
0x60, 0x1a, // bra IOReturn
// Control()
0x70, 0x02, // moveq #2,d0
M68K_EMUL_OP_SERIAL_CONTROL >> 8, M68K_EMUL_OP_SERIAL_CONTROL & 0xff,
0x0c, 0x68, 0x00, 0x01, 0x00, 0x1a, // cmp.w #1,$1a(a0)
0x66, 0x0e, // bne IOReturn
0x4e, 0x75, // rts
// Status()
0x70, 0x02, // moveq #2,d0
M68K_EMUL_OP_SERIAL_STATUS >> 8, M68K_EMUL_OP_SERIAL_STATUS & 0xff,
0x60, 0x06, // bra IOReturn
// Close()
0x70, 0x02, // moveq #2,d0
M68K_EMUL_OP_SERIAL_CLOSE >> 8, M68K_EMUL_OP_SERIAL_CLOSE & 0xff,
0x4e, 0x75, // rts
// IOReturn
0x32, 0x28, 0x00, 0x06, // move.w 6(a0),d1
0x08, 0x01, 0x00, 0x09, // btst #9,d1
0x67, 0x0c, // beq 1
0x4a, 0x40, // tst.w d0
0x6f, 0x02, // ble 2
0x42, 0x40, // clr.w d0
0x31, 0x40, 0x00, 0x10, //2 move.w d0,$10(a0)
0x4e, 0x75, // rts
0x4a, 0x40, //1 tst.w d0
0x6f, 0x04, // ble 3
0x42, 0x40, // clr.w d0
0x4e, 0x75, // rts
0x2f, 0x38, 0x08, 0xfc, //3 move.l $8fc,-(a7)
0x4e, 0x75, // rts
};
static const uint8 bout_driver[] = { // .BOut driver header
// Driver header
0x4e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x1a, // Open() offset
0x00, 0x20, // Prime() offset
0x00, 0x26, // Control() offset
0x00, 0x34, // Status() offset
0x00, 0x3a, // Close() offset
0x05, 0x2e, 0x42, 0x4f, 0x75, 0x74, 0x09, 0x00, // ".BOut",9
// Open()
0x70, 0x03, // moveq #3,d0
M68K_EMUL_OP_SERIAL_OPEN >> 8, M68K_EMUL_OP_SERIAL_OPEN & 0xff,
0x4e, 0x75, // rts
// Prime()
0x70, 0x03, // moveq #3,d0
M68K_EMUL_OP_SERIAL_PRIME >> 8, M68K_EMUL_OP_SERIAL_PRIME & 0xff,
0x60, 0x1a, // bra IOReturn
// Control()
0x70, 0x03, // moveq #3,d0
M68K_EMUL_OP_SERIAL_CONTROL >> 8, M68K_EMUL_OP_SERIAL_CONTROL & 0xff,
0x0c, 0x68, 0x00, 0x01, 0x00, 0x1a, // cmp.w #1,$1a(a0)
0x66, 0x0e, // bne IOReturn
0x4e, 0x75, // rts
// Status()
0x70, 0x03, // moveq #3,d0
M68K_EMUL_OP_SERIAL_STATUS >> 8, M68K_EMUL_OP_SERIAL_STATUS & 0xff,
0x60, 0x06, // bra IOReturn
// Close()
0x70, 0x03, // moveq #3,d0
M68K_EMUL_OP_SERIAL_CLOSE >> 8, M68K_EMUL_OP_SERIAL_CLOSE & 0xff,
0x4e, 0x75, // rts
// IOReturn
0x32, 0x28, 0x00, 0x06, // move.w 6(a0),d1
0x08, 0x01, 0x00, 0x09, // btst #9,d1
0x67, 0x0c, // beq 1
0x4a, 0x40, // tst.w d0
0x6f, 0x02, // ble 2
0x42, 0x40, // clr.w d0
0x31, 0x40, 0x00, 0x10, //2 move.w d0,$10(a0)
0x4e, 0x75, // rts
0x4a, 0x40, //1 tst.w d0
0x6f, 0x04, // ble 3
0x42, 0x40, // clr.w d0
0x4e, 0x75, // rts
0x2f, 0x38, 0x08, 0xfc, //3 move.l $8fc,-(a7)
0x4e, 0x75, // rts
};
/*
* ADBOp() patch
*/
static const uint8 adbop_patch[] = { // Call ADBOp() completion procedure
// The completion procedure may call ADBOp() again!
0x40, 0xe7, // move sr,-(sp)
0x00, 0x7c, 0x07, 0x00, // ori #$0700,sr
M68K_EMUL_OP_ADBOP >> 8, M68K_EMUL_OP_ADBOP & 0xff,
0x48, 0xe7, 0x70, 0xf0, // movem.l d1-d3/a0-a3,-(sp)
0x26, 0x48, // move.l a0,a3
0x4a, 0xab, 0x00, 0x04, // tst.l 4(a3)
0x67, 0x00, 0x00, 0x18, // beq 1
0x20, 0x53, // move.l (a3),a0
0x22, 0x6b, 0x00, 0x04, // move.l 4(a3),a1
0x24, 0x6b, 0x00, 0x08, // move.l 8(a3),a2
0x26, 0x78, 0x0c, 0xf8, // move.l $cf8,a3
0x4e, 0x91, // jsr (a1)
0x70, 0x00, // moveq #0,d0
0x60, 0x00, 0x00, 0x04, // bra 2
0x70, 0xff, //1 moveq #-1,d0
0x4c, 0xdf, 0x0f, 0x0e, //2 movem.l (sp)+,d1-d3/a0-a3
0x46, 0xdf, // move (sp)+,sr
0x4e, 0x75 // rts
};
/*
* Install .Sony, disk and CD-ROM drivers
*/
void InstallDrivers(uint32 pb)
{
D(bug("InstallDrivers, pb %08x\n", pb));
M68kRegisters r;
// Install Microseconds() replacement routine
r.a[0] = ROMBaseMac + microseconds_offset;
r.d[0] = 0xa093;
Execute68kTrap(0xa247, &r); // SetOSTrapAddress()
// Install DebugUtil() replacement routine
r.a[0] = ROMBaseMac + debugutil_offset;
r.d[0] = 0xa08d;
Execute68kTrap(0xa247, &r); // SetOSTrapAddress()
// Install disk driver
r.a[0] = ROMBaseMac + sony_offset + 0x100;
r.d[0] = (uint32)DiskRefNum;
Execute68kTrap(0xa43d, &r); // DrvrInstallRsrvMem()
r.a[0] = ReadMacInt32(ReadMacInt32(0x11c) + ~DiskRefNum * 4); // Get driver handle from Unit Table
Execute68kTrap(0xa029, &r); // HLock()
uint32 dce = ReadMacInt32(r.a[0]);
WriteMacInt32(dce + dCtlDriver, ROMBaseMac + sony_offset + 0x100);
WriteMacInt16(dce + dCtlFlags, DiskDriverFlags);
// Open disk driver
WriteMacInt32(pb + ioNamePtr, ROMBaseMac + sony_offset + 0x112);
r.a[0] = pb;
Execute68kTrap(0xa000, &r); // Open()
// Install CD-ROM driver unless nocdrom option given
if (!PrefsFindBool("nocdrom")) {
// Install CD-ROM driver
r.a[0] = ROMBaseMac + sony_offset + 0x200;
r.d[0] = (uint32)CDROMRefNum;
Execute68kTrap(0xa43d, &r); // DrvrInstallRsrvMem()
r.a[0] = ReadMacInt32(ReadMacInt32(0x11c) + ~CDROMRefNum * 4); // Get driver handle from Unit Table
Execute68kTrap(0xa029, &r); // HLock()
dce = ReadMacInt32(r.a[0]);
WriteMacInt32(dce + dCtlDriver, ROMBaseMac + sony_offset + 0x200);
WriteMacInt16(dce + dCtlFlags, CDROMDriverFlags);
// Open CD-ROM driver
WriteMacInt32(pb + ioNamePtr, ROMBaseMac + sony_offset + 0x212);
r.a[0] = pb;
Execute68kTrap(0xa000, &r); // Open()
}
}
/*
* Install serial drivers
*/
void InstallSERD(void)
{
D(bug("InstallSERD\n"));
// All drivers are inside the SERD resource
M68kRegisters r;
// Install .AIn driver
r.d[0] = (uint32)-6;
r.a[0] = ROMBaseMac + serd_offset + 0x100;
Execute68kTrap(0xa53d, &r); // DrvrInstallRsrvMem()
Execute68kTrap(0xa029, &r); // HLock()
uint32 drvr_ptr = ReadMacInt32(r.a[0]);
WriteMacInt32(drvr_ptr + dCtlDriver, ROMBaseMac + serd_offset + 0x100); // Pointer to driver header
WriteMacInt16(drvr_ptr + dCtlFlags, (ain_driver[0] << 8) + ain_driver[1]); // Driver flags
WriteMacInt16(drvr_ptr + dCtlQHdr + qFlags, 9); // Version number
// Install .AOut driver
r.d[0] = (uint32)-7;
r.a[0] = ROMBaseMac + serd_offset + 0x200;
Execute68kTrap(0xa53d, &r); // DrvrInstallRsrvMem()
Execute68kTrap(0xa029, &r); // HLock()
drvr_ptr = ReadMacInt32(r.a[0]);
WriteMacInt32(drvr_ptr + dCtlDriver, ROMBaseMac + serd_offset + 0x200); // Pointer to driver header
WriteMacInt16(drvr_ptr + dCtlFlags, (aout_driver[0] << 8) + aout_driver[1]); // Driver flags
WriteMacInt16(drvr_ptr + dCtlQHdr + qFlags, 9); // Version number
// Install .BIn driver
r.d[0] = (uint32)-8;
r.a[0] = ROMBaseMac + serd_offset + 0x300;
Execute68kTrap(0xa53d, &r); // DrvrInstallRsrvMem()
Execute68kTrap(0xa029, &r); // HLock()
drvr_ptr = ReadMacInt32(r.a[0]);
WriteMacInt32(drvr_ptr + dCtlDriver, ROMBaseMac + serd_offset + 0x300); // Pointer to driver header
WriteMacInt16(drvr_ptr + dCtlFlags, (bin_driver[0] << 8) + bin_driver[1]); // Driver flags
WriteMacInt16(drvr_ptr + dCtlQHdr + qFlags, 9); // Version number
// Install .BOut driver
r.d[0] = (uint32)-9;
r.a[0] = ROMBaseMac + serd_offset + 0x400;
Execute68kTrap(0xa53d, &r); // DrvrInstallRsrvMem()
Execute68kTrap(0xa029, &r); // HLock()
drvr_ptr = ReadMacInt32(r.a[0]);
WriteMacInt32(drvr_ptr + dCtlDriver, ROMBaseMac + serd_offset + 0x400); // Pointer to driver header
WriteMacInt16(drvr_ptr + dCtlFlags, (bout_driver[0] << 8) + bout_driver[1]); // Driver flags
WriteMacInt16(drvr_ptr + dCtlQHdr + qFlags, 9); // Version number
}
/*
* Install patches after MacOS startup
*/
void PatchAfterStartup(void)
{
#if SUPPORTS_EXTFS
// Install external file system
InstallExtFS();
#endif
}
/*
* Check ROM version, returns false if ROM version is not supported
*/
bool CheckROM(void)
{
// Read version
ROMVersion = ntohs(*(uint16 *)(ROMBaseHost + 8));
#if REAL_ADDRESSING || DIRECT_ADDRESSING
// Real and direct addressing modes require a 32-bit clean ROM
return ROMVersion == ROM_VERSION_32;
#else
// Virtual addressing mode works with 32-bit clean Mac II ROMs and Classic ROMs
return (ROMVersion == ROM_VERSION_CLASSIC) || (ROMVersion == ROM_VERSION_32);
#endif
}
/*
* Install ROM patches, returns false if ROM version is not supported
*/
// ROM patches for Mac Classic/SE ROMs (version $0276)
static bool patch_rom_classic(void)
{
uint16 *wp;
uint32 base;
// Don't jump into debugger (VIA line)
wp = (uint16 *)(ROMBaseHost + 0x1c40);
*wp = htons(0x601e);
// Don't complain about incorrect ROM checksum
wp = (uint16 *)(ROMBaseHost + 0x1c6c);
*wp = htons(0x7c00);
// Don't initialize IWM
wp = (uint16 *)(ROMBaseHost + 0x50);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
// Skip startup sound
wp = (uint16 *)(ROMBaseHost + 0x6a);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
// Don't loop in ADB init
wp = (uint16 *)(ROMBaseHost + 0x3364);
*wp = htons(M68K_NOP);
// Patch ClkNoMem
wp = (uint16 *)(ROMBaseHost + 0xa2c0);
*wp++ = htons(M68K_EMUL_OP_CLKNOMEM);
*wp = htons(0x4ed5); // jmp (a5)
// Skip main memory test (not that it wouldn't pass, but it's faster that way)
wp = (uint16 *)(ROMBaseHost + 0x11e);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
// Install our own drivers
wp = (uint16 *)(ROMBaseHost + 0x3f82a);
*wp++ = htons(M68K_EMUL_OP_INSTALL_DRIVERS);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
#if 1
// Don't look for SCSI devices
wp = (uint16 *)(ROMBaseHost + 0xd5a);
*wp = htons(0x601e);
#endif
// Replace .Sony driver
sony_offset = 0x34680;
D(bug("sony %08lx\n", sony_offset));
memcpy(ROMBaseHost + sony_offset, sony_driver, sizeof(sony_driver));
// Install .Disk and .AppleCD drivers
memcpy(ROMBaseHost + sony_offset + 0x100, disk_driver, sizeof(disk_driver));
memcpy(ROMBaseHost + sony_offset + 0x200, cdrom_driver, sizeof(cdrom_driver));
// Copy icons to ROM
SonyDiskIconAddr = ROMBaseMac + sony_offset + 0x400;
memcpy(ROMBaseHost + sony_offset + 0x400, SonyDiskIcon, sizeof(SonyDiskIcon));
SonyDriveIconAddr = ROMBaseMac + sony_offset + 0x600;
memcpy(ROMBaseHost + sony_offset + 0x600, SonyDriveIcon, sizeof(SonyDriveIcon));
DiskIconAddr = ROMBaseMac + sony_offset + 0x800;
memcpy(ROMBaseHost + sony_offset + 0x800, DiskIcon, sizeof(DiskIcon));
CDROMIconAddr = ROMBaseMac + sony_offset + 0xa00;
memcpy(ROMBaseHost + sony_offset + 0xa00, CDROMIcon, sizeof(CDROMIcon));
// Install SERD patch and serial drivers
serd_offset = 0x31bae;
D(bug("serd %08lx\n", serd_offset));
wp = (uint16 *)(ROMBaseHost + serd_offset + 12);
*wp++ = htons(M68K_EMUL_OP_SERD);
*wp = htons(M68K_RTS);
memcpy(ROMBaseHost + serd_offset + 0x100, ain_driver, sizeof(ain_driver));
memcpy(ROMBaseHost + serd_offset + 0x200, aout_driver, sizeof(aout_driver));
memcpy(ROMBaseHost + serd_offset + 0x300, bin_driver, sizeof(bin_driver));
memcpy(ROMBaseHost + serd_offset + 0x400, bout_driver, sizeof(bout_driver));
// Replace ADBOp()
memcpy(ROMBaseHost + 0x3880, adbop_patch, sizeof(adbop_patch));
// Replace Time Manager
wp = (uint16 *)(ROMBaseHost + 0x1a95c);
*wp++ = htons(M68K_EMUL_OP_INSTIME);
*wp = htons(M68K_RTS);
wp = (uint16 *)(ROMBaseHost + 0x1a96a);
*wp++ = htons(0x40e7); // move sr,-(sp)
*wp++ = htons(0x007c); // ori #$0700,sr
*wp++ = htons(0x0700);
*wp++ = htons(M68K_EMUL_OP_RMVTIME);
*wp++ = htons(0x46df); // move (sp)+,sr
*wp = htons(M68K_RTS);
wp = (uint16 *)(ROMBaseHost + 0x1a984);
*wp++ = htons(0x40e7); // move sr,-(sp)
*wp++ = htons(0x007c); // ori #$0700,sr
*wp++ = htons(0x0700);
*wp++ = htons(M68K_EMUL_OP_PRIMETIME);
*wp++ = htons(0x46df); // move (sp)+,sr
*wp++ = htons(M68K_RTS);
microseconds_offset = (uint8 *)wp - ROMBaseHost;
*wp++ = htons(M68K_EMUL_OP_MICROSECONDS);
*wp++ = htons(M68K_RTS);
// Replace DebugUtil
debugutil_offset = (uint8 *)wp - ROMBaseHost;
*wp++ = htons(M68K_EMUL_OP_DEBUGUTIL);
*wp = htons(M68K_RTS);
// Replace SCSIDispatch()
wp = (uint16 *)(ROMBaseHost + 0x1a206);
*wp++ = htons(M68K_EMUL_OP_SCSI_DISPATCH);
*wp++ = htons(0x2e49); // move.l a1,a7
*wp = htons(M68K_JMP_A0);
// Modify vCheckLoad() so we can patch resources
wp = (uint16 *)(ROMBaseHost + 0xe740);
*wp++ = htons(M68K_JMP);
*wp++ = htons((ROMBaseMac + sony_offset + 0x300) >> 16);
*wp = htons((ROMBaseMac + sony_offset + 0x300) & 0xffff);
wp = (uint16 *)(ROMBaseHost + sony_offset + 0x300);
*wp++ = htons(0x2f03); // move.l d3,-(sp) (save type)
*wp++ = htons(0x2078); // move.l $07f0,a0
*wp++ = htons(0x07f0);
*wp++ = htons(M68K_JSR_A0);
*wp++ = htons(0x221f); // move.l (sp)+,d1 (restore type)
*wp++ = htons(M68K_EMUL_OP_CHECKLOAD);
*wp = htons(M68K_RTS);
// Install PutScrap() patch for clipboard data exchange (the patch is activated by EMUL_OP_INSTALL_DRIVERS)
PutScrapPatch = ROMBaseMac + sony_offset + 0xc00;
base = ROMBaseMac + 0x12794;
wp = (uint16 *)(ROMBaseHost + sony_offset + 0xc00);
*wp++ = htons(M68K_EMUL_OP_PUT_SCRAP);
*wp++ = htons(M68K_JMP);
*wp++ = htons(base >> 16);
*wp = htons(base & 0xffff);
#if 0
// Boot from internal EDisk
wp = (uint16 *)(ROMBaseHost + 0x3f83c);
*wp = htons(M68K_NOP);
#endif
// Patch VIA interrupt handler
wp = (uint16 *)(ROMBaseHost + 0x2b3a); // Level 1 handler
*wp++ = htons(0x5888); // addq.l #4,a0
*wp++ = htons(0x5888); // addq.l #4,a0
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
wp = (uint16 *)(ROMBaseHost + 0x2be4); // 60Hz handler (handles everything)
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_EMUL_OP_IRQ);
*wp++ = htons(0x4a80); // tst.l d0
*wp = htons(0x67f4); // beq 0x402be2
return true;
}
// ROM patches for 32-bit clean Mac-II ROMs (version $067c)
static bool patch_rom_32(void)
{
uint32 *lp;
uint16 *wp;
uint8 *bp;
uint32 base;
// Find UniversalInfo
static const uint8 universal_dat[] = {0xdc, 0x00, 0x05, 0x05, 0x3f, 0xff, 0x01, 0x00};
if ((base = find_rom_data(0x3400, 0x3c00, universal_dat, sizeof(universal_dat))) == 0) return false;
UniversalInfo = base - 0x10;
D(bug("universal %08lx\n", UniversalInfo));
// Patch UniversalInfo (disable NuBus slots)
bp = ROMBaseHost + UniversalInfo + ReadMacInt32(ROMBaseMac + UniversalInfo + 12); // nuBusInfoPtr
bp[0] = 0x03;
for (int i=1; i<16; i++)
bp[i] = 0x08;
// Set model ID from preferences
bp = ROMBaseHost + UniversalInfo + 18; // productKind
*bp = PrefsFindInt32("modelid");
#if !ROM_IS_WRITE_PROTECTED
#if defined(USE_SCRATCHMEM_SUBTERFUGE)
// Set hardware base addresses to scratch memory area
if (PatchHWBases) {
extern uint8 *ScratchMem;
const uint32 ScratchMemBase = Host2MacAddr(ScratchMem);
D(bug("LMGlob\tOfs/4\tBase\n"));
base = ROMBaseMac + UniversalInfo + ReadMacInt32(ROMBaseMac + UniversalInfo); // decoderInfoPtr
wp = (uint16 *)(ROMBaseHost + 0x94a);
while (*wp != 0xffff) {
int16 ofs = ntohs(*wp++); // offset in decoderInfo (/4)
int16 lmg = ntohs(*wp++); // address of LowMem global
D(bug("0x%04x\t%d\t0x%08x\n", lmg, ofs, ReadMacInt32(base + ofs*4)));
// Fake address only if this is not the ASC base
if (lmg != 0xcc0)
WriteMacInt32(base + ofs*4, ScratchMemBase);
}
}
#else
#error System specific handling for writable ROM is required here
#endif
#endif
// Make FPU optional
if (FPUType == 0) {
bp = ROMBaseHost + UniversalInfo + 22; // defaultRSRCs
*bp = 4; // FPU optional
}
// Install special reset opcode and jump (skip hardware detection and tests)
wp = (uint16 *)(ROMBaseHost + 0x8c);
*wp++ = htons(M68K_EMUL_OP_RESET);
*wp++ = htons(M68K_JMP);
*wp++ = htons((ROMBaseMac + 0xba) >> 16);
*wp = htons((ROMBaseMac + 0xba) & 0xffff);
// Don't GetHardwareInfo
wp = (uint16 *)(ROMBaseHost + 0xc2);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
// Don't init VIAs
wp = (uint16 *)(ROMBaseHost + 0xc6);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
// Fake CPU type test
wp = (uint16 *)(ROMBaseHost + 0x7c0);
*wp++ = htons(0x7e00 + CPUType);
*wp = htons(M68K_RTS);
// Don't clear end of BootGlobs upto end of RAM (address xxxx0000)
static const uint8 clear_globs_dat[] = {0x42, 0x9a, 0x36, 0x0a, 0x66, 0xfa};
base = find_rom_data(0xa00, 0xb00, clear_globs_dat, sizeof(clear_globs_dat));
D(bug("clear_globs %08lx\n", base));
if (base) { // ROM15/20/22/23/26/27/32
wp = (uint16 *)(ROMBaseHost + base + 2);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
}
// Patch InitMMU (no MMU present, don't choke on unknown CPU types)
if (ROMSize <= 0x80000) {
static const uint8 init_mmu_dat[] = {0x0c, 0x47, 0x00, 0x03, 0x62, 0x00, 0xfe};
if ((base = find_rom_data(0x4000, 0x50000, init_mmu_dat, sizeof(init_mmu_dat))) == 0) return false;
} else {
static const uint8 init_mmu_dat[] = {0x0c, 0x47, 0x00, 0x04, 0x62, 0x00, 0xfd};
if ((base = find_rom_data(0x80000, 0x90000, init_mmu_dat, sizeof(init_mmu_dat))) == 0) return false;
}
D(bug("init_mmu %08lx\n", base));
wp = (uint16 *)(ROMBaseHost + base);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
wp++;
*wp++ = htons(0x7000); // moveq #0,d0
*wp = htons(M68K_NOP);
// Patch InitMMU (no RBV present)
static const uint8 init_mmu2_dat[] = {0x08, 0x06, 0x00, 0x0d, 0x67};
if (ROMSize <= 0x80000) {
base = find_rom_data(0x4000, 0x50000, init_mmu2_dat, sizeof(init_mmu2_dat));
} else {
base = find_rom_data(0x80000, 0x90000, init_mmu2_dat, sizeof(init_mmu2_dat));
}
D(bug("init_mmu2 %08lx\n", base));
if (base) { // ROM11/10/13/26
bp = (uint8 *)(ROMBaseHost + base + 4);
*bp = 0x60; // bra
}
// Patch InitMMU (don't init MMU)
static const uint8 init_mmu3_dat[] = {0x0c, 0x2e, 0x00, 0x01, 0xff, 0xe6, 0x66, 0x0c, 0x4c, 0xed, 0x03, 0x87, 0xff, 0xe8};
if (ROMSize <= 0x80000) {
if ((base = find_rom_data(0x4000, 0x50000, init_mmu3_dat, sizeof(init_mmu3_dat))) == 0) return false;
} else {
if ((base = find_rom_data(0x80000, 0x90000, init_mmu3_dat, sizeof(init_mmu3_dat))) == 0) return false;
}
D(bug("init_mmu3 %08lx\n", base));
wp = (uint16 *)(ROMBaseHost + base + 6);
*wp = htons(M68K_NOP);
// Replace XPRAM routines
static const uint8 read_xpram_dat[] = {0x26, 0x4e, 0x41, 0xf9, 0x50, 0xf0, 0x00, 0x00, 0x08, 0x90, 0x00, 0x02};
base = find_rom_data(0x40000, 0x50000, read_xpram_dat, sizeof(read_xpram_dat));
D(bug("read_xpram %08lx\n", base));
if (base) { // ROM10
wp = (uint16 *)(ROMBaseHost + base);
*wp++ = htons(M68K_EMUL_OP_READ_XPRAM);
*wp = htons(0x4ed6); // jmp (a6)
}
static const uint8 read_xpram2_dat[] = {0x26, 0x4e, 0x08, 0x92, 0x00, 0x02, 0xea, 0x59, 0x02, 0x01, 0x00, 0x07, 0x00, 0x01, 0x00, 0xb8};
base = find_rom_data(0x40000, 0x50000, read_xpram2_dat, sizeof(read_xpram2_dat));
D(bug("read_xpram2 %08lx\n", base));
if (base) { // ROM11
wp = (uint16 *)(ROMBaseHost + base);
*wp++ = htons(M68K_EMUL_OP_READ_XPRAM);
*wp = htons(0x4ed6); // jmp (a6)
}
if (ROMSize > 0x80000) {
static const uint8 read_xpram3_dat[] = {0x48, 0xe7, 0xe0, 0x60, 0x02, 0x01, 0x00, 0x70, 0x0c, 0x01, 0x00, 0x20};
base = find_rom_data(0x80000, 0x90000, read_xpram3_dat, sizeof(read_xpram3_dat));
D(bug("read_xpram3 %08lx\n", base));
if (base) { // ROM15
wp = (uint16 *)(ROMBaseHost + base);
*wp++ = htons(M68K_EMUL_OP_READ_XPRAM2);
*wp = htons(M68K_RTS);
}
}
// Patch ClkNoMem
base = find_rom_trap(0xa053);
wp = (uint16 *)(ROMBaseHost + base);
if (ntohs(*wp) == 0x4ed5) { // ROM23/26/27/32
static const uint8 clk_no_mem_dat[] = {0x40, 0xc2, 0x00, 0x7c, 0x07, 0x00, 0x48, 0x42};
if ((base = find_rom_data(0xb0000, 0xb8000, clk_no_mem_dat, sizeof(clk_no_mem_dat))) == 0) return false;
}
D(bug("clk_no_mem %08lx\n", base));
wp = (uint16 *)(ROMBaseHost + base);
*wp++ = htons(M68K_EMUL_OP_CLKNOMEM);
*wp = htons(0x4ed5); // jmp (a5)
// Patch BootGlobs
wp = (uint16 *)(ROMBaseHost + 0x10e);
*wp++ = htons(M68K_EMUL_OP_PATCH_BOOT_GLOBS);
*wp = htons(M68K_NOP);
// Don't init SCC
static const uint8 init_scc_dat[] = {0x08, 0x38, 0x00, 0x01, 0x0d, 0xd1, 0x67, 0x04};
if ((base = find_rom_data(0xa00, 0xa80, init_scc_dat, sizeof(init_scc_dat))) == 0) return false;
D(bug("init_scc %08lx\n", base));
wp = (uint16 *)(ROMBaseHost + base);
*wp = htons(M68K_RTS);
// Don't access 0x50f1a101
wp = (uint16 *)(ROMBaseHost + 0x4232);
if (ntohs(wp[1]) == 0x50f1 && ntohs(wp[2]) == 0xa101) { // ROM32
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
}
// Don't init IWM
wp = (uint16 *)(ROMBaseHost + 0x9c0);
*wp = htons(M68K_RTS);
// Don't init SCSI
wp = (uint16 *)(ROMBaseHost + 0x9a0);
*wp = htons(M68K_RTS);
// Don't init ASC
static const uint8 init_asc_dat[] = {0x26, 0x68, 0x00, 0x30, 0x12, 0x00, 0xeb, 0x01};
base = find_rom_data(0x4000, 0x5000, init_asc_dat, sizeof(init_asc_dat));
D(bug("init_asc %08lx\n", base));
if (base) { // ROM15/22/23/26/27/32
wp = (uint16 *)(ROMBaseHost + base);
*wp = htons(0x4ed6); // jmp (a6)
}
// Don't EnableExtCache
wp = (uint16 *)(ROMBaseHost + 0x190);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
// Don't DisableIntSources
wp = (uint16 *)(ROMBaseHost + 0x9f4c);
*wp = htons(M68K_RTS);
// Fake CPU speed test (SetupTimeK)
// *** increased jl : MacsBug uses TimeDBRA for kbd repeat timing
wp = (uint16 *)(ROMBaseHost + 0x800);
*wp++ = htons(0x31fc); // move.w #xxx,TimeDBRA
*wp++ = htons(10000);
*wp++ = htons(0x0d00);
*wp++ = htons(0x31fc); // move.w #xxx,TimeSCCDBRA
*wp++ = htons(10000);
*wp++ = htons(0x0d02);
*wp++ = htons(0x31fc); // move.w #xxx,TimeSCSIDBRA
*wp++ = htons(10000);
*wp++ = htons(0x0b24);
*wp++ = htons(0x31fc); // move.w #xxx,TimeRAMDBRA
*wp++ = htons(10000);
*wp++ = htons(0x0cea);
*wp = htons(M68K_RTS);
#if REAL_ADDRESSING
// Move system zone to start of Mac RAM
wp = (uint16 *)(ROMBaseHost + 0x50a);
*wp++ = htons(HiWord(RAMBaseMac + 0x2000));
*wp++ = htons(LoWord(RAMBaseMac + 0x2000));
*wp++ = htons(HiWord(RAMBaseMac + 0x3800));
*wp = htons(LoWord(RAMBaseMac + 0x3800));
#endif
#if !ROM_IS_WRITE_PROTECTED
#if defined(USE_SCRATCHMEM_SUBTERFUGE)
// Set fake handle at 0x0000 to scratch memory area (so broken Mac programs won't write into Mac ROM)
extern uint8 *ScratchMem;
const uint32 ScratchMemBase = Host2MacAddr(ScratchMem);
wp = (uint16 *)(ROMBaseHost + 0xccaa);
*wp++ = htons(0x203c); // move.l #ScratchMem,d0
*wp++ = htons(ScratchMemBase >> 16);
*wp = htons(ScratchMemBase);
#else
#error System specific handling for writable ROM is required here
#endif
#endif
#if REAL_ADDRESSING && defined(AMIGA)
// Don't overwrite SysBase under AmigaOS
wp = (uint16 *)(ROMBaseHost + 0xccb4);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
#endif
#if REAL_ADDRESSING && !defined(AMIGA)
// gb-- Temporary hack to get rid of crashes in Speedometer
wp = (uint16 *)(ROMBaseHost + 0xdba2);
if (ntohs(*wp) == 0x662c) // bne.b #$2c
*wp = htons(0x602c); // bra.b #$2c
#endif
// Don't write to VIA in InitTimeMgr
wp = (uint16 *)(ROMBaseHost + 0xb0e2);
*wp++ = htons(0x4cdf); // movem.l (sp)+,d0-d5/a0-a4
*wp++ = htons(0x1f3f);
*wp = htons(M68K_RTS);
// Don't read ModelID from 0x5ffffffc
static const uint8 model_id_dat[] = {0x20, 0x7c, 0x5f, 0xff, 0xff, 0xfc, 0x72, 0x07, 0xc2, 0x90};
base = find_rom_data(0x40000, 0x50000, model_id_dat, sizeof(model_id_dat));
D(bug("model_id %08lx\n", base));
if (base) { // ROM20
wp = (uint16 *)(ROMBaseHost + base + 8);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
}
// Don't read ModelID from 0x5ffffffc
static const uint8 model_id2_dat[] = {0x45, 0xf9, 0x5f, 0xff, 0xff, 0xfc, 0x20, 0x12};
base = find_rom_data(0x4000, 0x5000, model_id2_dat, sizeof(model_id2_dat));
D(bug("model_id2 %08lx\n", base));
if (base) { // ROM27/32
wp = (uint16 *)(ROMBaseHost + base + 6);
*wp++ = htons(0x7000); // moveq #0,d0
*wp++ = htons(0xb040); // cmp.w d0,d0
*wp = htons(0x4ed6); // jmp (a6)
}
// Install slot ROM
if (!InstallSlotROM())
return false;
// Don't probe NuBus slots
static const uint8 nubus_dat[] = {0x45, 0xfa, 0x00, 0x0a, 0x42, 0xa7, 0x10, 0x11};
base = find_rom_data(0x5000, 0x6000, nubus_dat, sizeof(nubus_dat));
D(bug("nubus %08lx\n", base));
if (base) { // ROM10/11
wp = (uint16 *)(ROMBaseHost + base + 6);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
}
// Don't EnableOneSecInts
static const uint8 lea_dat[] = {0x41, 0xf9};
if ((base = find_rom_data(0x226, 0x22a, lea_dat, sizeof(lea_dat))) == 0) return false;
D(bug("enable_one_sec_ints %08lx\n", base));
wp = (uint16 *)(ROMBaseHost + base);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
// Don't EnableParityPatch/Enable60HzInts
if ((base = find_rom_data(0x230, 0x234, lea_dat, sizeof(lea_dat))) == 0) {
wp = (uint16 *)(ROMBaseHost + 0x230);
if (ntohs(*wp) == 0x6100) // ROM11
base = 0x230;
else
return false;
}
D(bug("enable_60hz_ints %08lx\n", base));
wp = (uint16 *)(ROMBaseHost + base);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
// Compute boot stack pointer and fix logical/physical RAM size (CompBootStack) (must be done after InitMemMgr!)
wp = (uint16 *)(ROMBaseHost + 0x490);
*wp++ = htons(0x2038); // move.l $10c,d0
*wp++ = htons(0x010c);
*wp++ = htons(0xd0b8); // add.l $2a6,d0
*wp++ = htons(0x02a6);
*wp++ = htons(0xe288); // lsr.l #1,d0
*wp++ = htons(0x0880); // bclr #0,d0
*wp++ = htons(0x0000);
*wp++ = htons(0x0440); // subi.w #$400,d0
*wp++ = htons(0x0400);
*wp++ = htons(0x2040); // move.l d0,a0
*wp++ = htons(M68K_EMUL_OP_FIX_MEMSIZE);
*wp++ = htons(M68K_RTS);
static const uint8 fix_memsize2_dat[] = {0x22, 0x30, 0x81, 0xe2, 0x0d, 0xdc, 0xff, 0xba, 0xd2, 0xb0, 0x81, 0xe2, 0x0d, 0xdc, 0xff, 0xec, 0x21, 0xc1, 0x1e, 0xf8};
base = find_rom_data(0x4c000, 0x4c080, fix_memsize2_dat, sizeof(fix_memsize2_dat));
D(bug("fix_memsize2 %08lx\n", base));
if (base) { // ROM15/22/23/26/27/32
wp = (uint16 *)(ROMBaseHost + base + 16);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
}
// Don't open .Sound driver but install our own drivers
wp = (uint16 *)(ROMBaseHost + 0x1142);
*wp = htons(M68K_EMUL_OP_INSTALL_DRIVERS);
// Don't access SonyVars
wp = (uint16 *)(ROMBaseHost + 0x1144);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
wp += 2;
*wp = htons(M68K_NOP);
// Don't write to VIA in InitADB
wp = (uint16 *)(ROMBaseHost + 0xa8a8);
if (*wp == 0) { // ROM22/23/26/27/32
wp = (uint16 *)(ROMBaseHost + 0xb2c6a);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
wp = (uint16 *)(ROMBaseHost + 0xb2d2e);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
wp += 2;
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
} else {
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
wp = (uint16 *)(ROMBaseHost + 0xa662);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
wp += 2;
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
}
// Don't EnableSlotInts
if ((base = find_rom_data(0x2ee, 0x2f2, lea_dat, sizeof(lea_dat))) == 0) return false;
D(bug("enable_slot_ints %08lx\n", base));
wp = (uint16 *)(ROMBaseHost + base);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
// Don't mangle frame buffer base (GetDevBase)
wp = (uint16 *)(ROMBaseHost + 0x5b78);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(0x2401); // move.l d1,d2
*wp = htons(0x605e); // bra 0x40805bde
// Really don't mangle frame buffer base
if (ROMSize > 0x80000) {
static const uint8 frame_base_dat[] = {0x22, 0x78, 0x0d, 0xd8, 0xd3, 0xe9, 0x00, 0x08};
base = find_rom_data(0x8c000, 0x8d000, frame_base_dat, sizeof(frame_base_dat));
D(bug("frame_base %08lx\n", base));
if (base) { // ROM22/23/26/27/32
wp = (uint16 *)(ROMBaseHost + base);
*wp++ = htons(0x2401); // move.l d1,d2
*wp = htons(M68K_RTS);
}
}
// Don't write to VIA2
static const uint8 via2_dat[] = {0x20, 0x78, 0x0c, 0xec, 0x11, 0x7c, 0x00, 0x90};
if ((base = find_rom_data(0xa000, 0xa400, via2_dat, sizeof(via2_dat))) == 0) return false;
D(bug("via2 %08lx\n", base));
wp = (uint16 *)(ROMBaseHost + base + 4);
*wp = htons(M68K_RTS);
// Don't write to VIA2, even on ROM20
static const uint8 via2b_dat[] = {0x20, 0x78, 0x0c, 0xec, 0x11, 0x7c, 0x00, 0x90, 0x00, 0x13, 0x4e, 0x75};
base = find_rom_data(0x40000, 0x44000, via2b_dat, sizeof(via2b_dat));
D(bug("via2b %08lx\n", base));
if (base) { // ROM19/20
wp = (uint16 *)(ROMBaseHost + base + 4);
*wp = htons(M68K_RTS);
}
// Don't use PTEST instruction on 68040/060
if (ROMSize > 0x80000) {
// BlockMove()
static const uint8 bmove_dat[] = {0x20, 0x5f, 0x22, 0x5f, 0x0c, 0x38, 0x00, 0x04, 0x01, 0x2f};
base = find_rom_data(0x87000, 0x87800, bmove_dat, sizeof(bmove_dat));
D(bug("block_move %08lx\n", base));
if (base) { // ROM15/22/23/26/27/32
wp = (uint16 *)(ROMBaseHost + base + 4);
*wp++ = htons(M68K_EMUL_OP_BLOCK_MOVE);
*wp++ = htons(0x7000);
*wp = htons(M68K_RTS);
}
// SANE
static const uint8 ptest2_dat[] = {0x0c, 0x38, 0x00, 0x04, 0x01, 0x2f, 0x6d, 0x54, 0x48, 0xe7, 0xf8, 0x60};
base = find_rom_data(0, ROMSize, ptest2_dat, sizeof(ptest2_dat));
D(bug("ptest2 %08lx\n", base));
if (base) { // ROM15/20/22/23/26/27/32
wp = (uint16 *)(ROMBaseHost + base + 8);
*wp++ = htons(M68K_NOP);
*wp++ = htons(0xf4f8); // cpusha dc/ic
*wp++ = htons(M68K_NOP);
*wp++ = htons(0x7000); // moveq #0,d0
*wp = htons(M68K_RTS);
}
}
// Don't set MemoryDispatch() to unimplemented trap
static const uint8 memdisp_dat[] = {0x30, 0x3c, 0xa8, 0x9f, 0xa7, 0x46, 0x30, 0x3c, 0xa0, 0x5c, 0xa2, 0x47};
base = find_rom_data(0x4f100, 0x4f180, memdisp_dat, sizeof(memdisp_dat));
D(bug("memdisp %08lx\n", base));
if (base) { // ROM15/22/23/26/27/32
wp = (uint16 *)(ROMBaseHost + base + 10);
*wp = htons(M68K_NOP);
}
// Patch .EDisk driver (don't scan for EDisks in the area ROMBase..0xe00000)
uint32 edisk_offset = find_rom_resource(FOURCC('D','R','V','R'), 51);
if (edisk_offset) {
static const uint8 edisk_dat[] = {0xd5, 0xfc, 0x00, 0x01, 0x00, 0x00, 0xb5, 0xfc, 0x00, 0xe0, 0x00, 0x00};
base = find_rom_data(edisk_offset, edisk_offset + 0x10000, edisk_dat, sizeof(edisk_dat));
D(bug("edisk %08lx\n", base));
if (base) {
wp = (uint16 *)(ROMBaseHost + base + 8);
*wp++ = 0;
*wp = 0;
}
}
// Replace .Sony driver
sony_offset = find_rom_resource(FOURCC('D','R','V','R'), 4);
D(bug("sony %08lx\n", sony_offset));
memcpy(ROMBaseHost + sony_offset, sony_driver, sizeof(sony_driver));
// Install .Disk and .AppleCD drivers
memcpy(ROMBaseHost + sony_offset + 0x100, disk_driver, sizeof(disk_driver));
memcpy(ROMBaseHost + sony_offset + 0x200, cdrom_driver, sizeof(cdrom_driver));
// Copy icons to ROM
SonyDiskIconAddr = ROMBaseMac + sony_offset + 0x400;
memcpy(ROMBaseHost + sony_offset + 0x400, SonyDiskIcon, sizeof(SonyDiskIcon));
SonyDriveIconAddr = ROMBaseMac + sony_offset + 0x600;
memcpy(ROMBaseHost + sony_offset + 0x600, SonyDriveIcon, sizeof(SonyDriveIcon));
DiskIconAddr = ROMBaseMac + sony_offset + 0x800;
memcpy(ROMBaseHost + sony_offset + 0x800, DiskIcon, sizeof(DiskIcon));
CDROMIconAddr = ROMBaseMac + sony_offset + 0xa00;
memcpy(ROMBaseHost + sony_offset + 0xa00, CDROMIcon, sizeof(CDROMIcon));
// Install SERD patch and serial drivers
serd_offset = find_rom_resource(FOURCC('S','E','R','D'), 0);
D(bug("serd %08lx\n", serd_offset));
wp = (uint16 *)(ROMBaseHost + serd_offset + 12);
*wp++ = htons(M68K_EMUL_OP_SERD);
*wp = htons(M68K_RTS);
memcpy(ROMBaseHost + serd_offset + 0x100, ain_driver, sizeof(ain_driver));
memcpy(ROMBaseHost + serd_offset + 0x200, aout_driver, sizeof(aout_driver));
memcpy(ROMBaseHost + serd_offset + 0x300, bin_driver, sizeof(bin_driver));
memcpy(ROMBaseHost + serd_offset + 0x400, bout_driver, sizeof(bout_driver));
// Replace ADBOp()
memcpy(ROMBaseHost + find_rom_trap(0xa07c), adbop_patch, sizeof(adbop_patch));
// Replace Time Manager (the Microseconds patch is activated in InstallDrivers())
wp = (uint16 *)(ROMBaseHost + find_rom_trap(0xa058));
*wp++ = htons(M68K_EMUL_OP_INSTIME);
*wp = htons(M68K_RTS);
wp = (uint16 *)(ROMBaseHost + find_rom_trap(0xa059));
*wp++ = htons(0x40e7); // move sr,-(sp)
*wp++ = htons(0x007c); // ori #$0700,sr
*wp++ = htons(0x0700);
*wp++ = htons(M68K_EMUL_OP_RMVTIME);
*wp++ = htons(0x46df); // move (sp)+,sr
*wp = htons(M68K_RTS);
wp = (uint16 *)(ROMBaseHost + find_rom_trap(0xa05a));
*wp++ = htons(0x40e7); // move sr,-(sp)
*wp++ = htons(0x007c); // ori #$0700,sr
*wp++ = htons(0x0700);
*wp++ = htons(M68K_EMUL_OP_PRIMETIME);
*wp++ = htons(0x46df); // move (sp)+,sr
*wp++ = htons(M68K_RTS);
microseconds_offset = (uint8 *)wp - ROMBaseHost;
*wp++ = htons(M68K_EMUL_OP_MICROSECONDS);
*wp++ = htons(M68K_RTS);
// Replace DebugUtil
debugutil_offset = (uint8 *)wp - ROMBaseHost;
*wp++ = htons(M68K_EMUL_OP_DEBUGUTIL);
*wp = htons(M68K_RTS);
// Replace SCSIDispatch()
wp = (uint16 *)(ROMBaseHost + find_rom_trap(0xa815));
*wp++ = htons(M68K_EMUL_OP_SCSI_DISPATCH);
*wp++ = htons(0x2e49); // move.l a1,a7
*wp = htons(M68K_JMP_A0);
// Modify vCheckLoad() so we can patch resources
wp = (uint16 *)(ROMBaseHost + 0x1b8f4);
*wp++ = htons(M68K_JMP);
*wp++ = htons((ROMBaseMac + sony_offset + 0x300) >> 16);
*wp = htons((ROMBaseMac + sony_offset + 0x300) & 0xffff);
wp = (uint16 *)(ROMBaseHost + sony_offset + 0x300);
*wp++ = htons(0x2f03); // move.l d3,-(sp) (save type)
*wp++ = htons(0x2078); // move.l $07f0,a0
*wp++ = htons(0x07f0);
*wp++ = htons(M68K_JSR_A0);
*wp++ = htons(0x221f); // move.l (sp)+,d1 (restore type)
*wp++ = htons(M68K_EMUL_OP_CHECKLOAD);
*wp = htons(M68K_RTS);
// Patch PowerOff()
wp = (uint16 *)(ROMBaseHost + find_rom_trap(0xa05b)); // PowerOff()
*wp = htons(M68K_EMUL_OP_SHUTDOWN);
// Install PutScrap() patch for clipboard data exchange (the patch is activated by EMUL_OP_INSTALL_DRIVERS)
PutScrapPatch = ROMBaseMac + sony_offset + 0xc00;
base = ROMBaseMac + find_rom_trap(0xa9fe);
wp = (uint16 *)(ROMBaseHost + sony_offset + 0xc00);
*wp++ = htons(M68K_EMUL_OP_PUT_SCRAP);
*wp++ = htons(M68K_JMP);
*wp++ = htons(base >> 16);
*wp = htons(base & 0xffff);
// Install GetScrap() patch for clipboard data exchange (the patch is activated by EMUL_OP_INSTALL_DRIVERS)
GetScrapPatch = ROMBaseMac + sony_offset + 0xd00;
base = ROMBaseMac + find_rom_trap(0xa9fd);
wp = (uint16 *)(ROMBaseHost + sony_offset + 0xd00);
*wp++ = htons(M68K_EMUL_OP_GET_SCRAP);
*wp++ = htons(M68K_JMP);
*wp++ = htons(base >> 16);
*wp = htons(base & 0xffff);
// Look for double PACK 4 resources
if ((base = find_rom_resource(FOURCC('P','A','C','K'), 4)) == 0) return false;
if ((base = find_rom_resource(FOURCC('P','A','C','K'), 4, true)) == 0 && FPUType == 0)
printf("WARNING: This ROM seems to require an FPU\n");
// Patch VIA interrupt handler
wp = (uint16 *)(ROMBaseHost + 0x9bc4); // Level 1 handler
*wp++ = htons(0x7002); // moveq #2,d0 (always 60Hz interrupt)
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp = htons(M68K_NOP);
wp = (uint16 *)(ROMBaseHost + 0xa296); // 60Hz handler (handles everything)
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_NOP);
*wp++ = htons(M68K_EMUL_OP_IRQ);
*wp++ = htons(0x4a80); // tst.l d0
*wp = htons(0x67f4); // beq 0x4080a294
return true;
}
bool PatchROM(void)
{
// Print some information about the ROM
if (PrintROMInfo)
print_rom_info();
// Patch ROM depending on version
switch (ROMVersion) {
case ROM_VERSION_CLASSIC:
if (!patch_rom_classic())
return false;
break;
case ROM_VERSION_32:
if (!patch_rom_32())
return false;
break;
default:
return false;
}
// Install breakpoint
if (ROMBreakpoint) {
uint16 *wp = (uint16 *)(ROMBaseHost + ROMBreakpoint);
*wp = htons(M68K_EMUL_BREAK);
}
// Clear caches as we loaded and patched code
FlushCodeCache(ROMBaseHost, ROMSize);
return true;
}
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