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https://github.com/RaySollium99/picodrive.git
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protection and more mapper support for new mem code
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@771 be3aeb3a-fb24-0410-a615-afba39da0efa
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notaz
parent
45f2f245f5
commit
000f53350c
7 changed files with 512 additions and 109 deletions
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@ -1,5 +1,5 @@
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/*
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* Support for a few cart mappers.
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* Support for a few cart mappers and some protection.
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*
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* (c) Copyright 2008-2009, Grazvydas "notaz" Ignotas
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* Free for non-commercial use.
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@ -10,6 +10,68 @@
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#include "../memory.h"
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/* The SSFII mapper */
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unsigned char ssf2_banks[8];
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static carthw_state_chunk carthw_ssf2_state[] =
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{
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{ CHUNK_CARTHW, sizeof(ssf2_banks), &ssf2_banks },
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{ 0, 0, NULL }
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};
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static void carthw_ssf2_write8(u32 a, u32 d)
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{
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u32 target, base;
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if ((a & 0xfffff0) != 0xa130f0) {
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PicoWrite8_io(a, d);
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return;
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}
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a &= 0x0e;
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if (a == 0)
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return;
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ssf2_banks[a >> 1] = d;
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base = d << 19;
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target = a << 18;
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if (base + 0x80000 > Pico.romsize) {
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elprintf(EL_ANOMALY|EL_STATUS, "ssf2: missing bank @ %06x", base);
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return;
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}
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cpu68k_map_set(m68k_read8_map, target, target + 0x80000 - 1, Pico.rom + base, 0);
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cpu68k_map_set(m68k_read16_map, target, target + 0x80000 - 1, Pico.rom + base, 0);
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}
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static void carthw_ssf2_mem_setup(void)
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{
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cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, carthw_ssf2_write8, 1);
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}
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static void carthw_ssf2_statef(void)
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{
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int i;
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for (i = 1; i < 8; i++)
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carthw_ssf2_write8(0xa130f0 | (i << 1), ssf2_banks[i]);
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}
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void carthw_ssf2_startup(void)
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{
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int i;
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elprintf(EL_STATUS, "SSF2 mapper startup");
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// default map
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for (i = 0; i < 8; i++)
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ssf2_banks[i] = i;
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PicoCartMemSetup = carthw_ssf2_mem_setup;
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PicoLoadStateHook = carthw_ssf2_statef;
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carthw_chunks = carthw_ssf2_state;
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}
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/* Common *-in-1 pirate mapper.
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* Switches banks based on addr lines when /TIME is set.
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* TODO: verify
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@ -202,3 +264,243 @@ void carthw_radica_startup(void)
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carthw_chunks = carthw_Xin1_state;
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}
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/* Simple unlicensed ROM protection emulation */
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static struct {
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u32 addr;
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u32 mask;
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u16 val;
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u16 readonly;
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} *sprot_items;
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static int sprot_item_alloc;
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static int sprot_item_count;
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static u16 *carthw_sprot_get_val(u32 a, int rw_only)
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{
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int i;
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for (i = 0; i < sprot_item_count; i++)
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if ((a & sprot_items[i].mask) == sprot_items[i].addr)
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if (!rw_only || !sprot_items[i].readonly)
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return &sprot_items[i].val;
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return NULL;
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}
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static u32 PicoRead8_sprot(u32 a)
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{
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u16 *val;
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u32 d;
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if (0xa10000 <= a && a < 0xa12000)
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return PicoRead8_io(a);
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val = carthw_sprot_get_val(a, 0);
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if (val != NULL) {
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d = *val;
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if (!(a & 1))
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d >>= 8;
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elprintf(EL_UIO, "prot r8 [%06x] %02x @%06x", a, d, SekPc);
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return d;
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}
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else {
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elprintf(EL_UIO, "prot r8 [%06x] MISS @%06x", a, SekPc);
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return 0;
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}
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}
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static u32 PicoRead16_sprot(u32 a)
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{
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u16 *val;
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if (0xa10000 <= a && a < 0xa12000)
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return PicoRead16_io(a);
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val = carthw_sprot_get_val(a, 0);
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if (val != NULL) {
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elprintf(EL_UIO, "prot r16 [%06x] %04x @%06x", a, *val, SekPc);
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return *val;
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}
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else {
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elprintf(EL_UIO, "prot r16 [%06x] MISS @%06x", a, SekPc);
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return 0;
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}
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}
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static void PicoWrite8_sprot(u32 a, u32 d)
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{
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u16 *val;
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if (0xa10000 <= a && a < 0xa12000) {
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PicoWrite8_io(a, d);
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return;
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}
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val = carthw_sprot_get_val(a, 1);
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if (val != NULL) {
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if (a & 1)
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*val = (*val & 0xff00) | (d | 0xff);
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else
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*val = (*val & 0x00ff) | (d << 8);
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elprintf(EL_UIO, "prot w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
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}
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else
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elprintf(EL_UIO, "prot w8 [%06x] %02x MISS @%06x", a, d & 0xff, SekPc);
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}
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static void PicoWrite16_sprot(u32 a, u32 d)
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{
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u16 *val;
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if (0xa10000 <= a && a < 0xa12000) {
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PicoWrite16_io(a, d);
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return;
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}
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val = carthw_sprot_get_val(a, 1);
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if (val != NULL) {
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*val = d;
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elprintf(EL_UIO, "prot w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
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}
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else
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elprintf(EL_UIO, "prot w16 [%06x] %04x MISS @%06x", a, d & 0xffff, SekPc);
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}
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void carthw_sprot_new_location(unsigned int a, unsigned int mask, unsigned short val, int is_ro)
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{
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if (sprot_items == NULL) {
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sprot_items = calloc(8, sizeof(sprot_items[0]));
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sprot_item_alloc = 8;
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sprot_item_count = 0;
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}
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if (sprot_item_count == sprot_item_alloc) {
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void *tmp;
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sprot_item_alloc *= 2;
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tmp = realloc(sprot_items, sprot_item_alloc);
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if (tmp == NULL) {
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elprintf(EL_STATUS, "OOM");
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return;
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}
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sprot_items = tmp;
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}
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sprot_items[sprot_item_count].addr = a;
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sprot_items[sprot_item_count].mask = mask;
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sprot_items[sprot_item_count].val = val;
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sprot_items[sprot_item_count].readonly = is_ro;
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sprot_item_count++;
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}
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static void carthw_sprot_unload(void)
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{
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free(sprot_items);
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sprot_items = NULL;
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sprot_item_count = sprot_item_alloc = 0;
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}
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static void carthw_sprot_mem_setup(void)
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{
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int start;
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// map ROM - 0x7fffff, /TIME areas (which are tipically used)
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start = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
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cpu68k_map_set(m68k_read8_map, start, 0x7fffff, PicoRead8_sprot, 1);
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cpu68k_map_set(m68k_read16_map, start, 0x7fffff, PicoRead16_sprot, 1);
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cpu68k_map_set(m68k_write8_map, start, 0x7fffff, PicoWrite8_sprot, 1);
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cpu68k_map_set(m68k_write16_map, start, 0x7fffff, PicoWrite16_sprot, 1);
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cpu68k_map_set(m68k_read8_map, 0xa10000, 0xa1ffff, PicoRead8_sprot, 1);
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cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, PicoRead16_sprot, 1);
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cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, PicoWrite8_sprot, 1);
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cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_sprot, 1);
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}
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void carthw_sprot_startup(void)
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{
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elprintf(EL_STATUS, "Prot emu startup");
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PicoCartMemSetup = carthw_sprot_mem_setup;
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PicoCartUnloadHook = carthw_sprot_unload;
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}
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/* Protection emulation for Lion King 3. Credits go to Haze */
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static u8 prot_lk3_cmd, prot_lk3_data;
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static u32 PicoRead8_plk3(u32 a)
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{
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u32 d = 0;
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switch (prot_lk3_cmd) {
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case 1: d = prot_lk3_data >> 1; break;
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case 2: // nibble rotate
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d = ((prot_lk3_data >> 4) | (prot_lk3_data << 4)) & 0xff;
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break;
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case 3: // bit rotate
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d = prot_lk3_data;
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d = (d >> 4) | (d << 4);
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d = ((d & 0xcc) >> 2) | ((d & 0x33) << 2);
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d = ((d & 0xaa) >> 1) | ((d & 0x55) << 1);
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break;
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/* Top Fighter 2000 MK VIII (Unl)
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case 0x98: d = 0x50; break; // prot_lk3_data == a8 here
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case 0x67: d = 0xde; break; // prot_lk3_data == 7b here (rot!)
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case 0xb5: d = 0x9f; break; // prot_lk3_data == 4a
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*/
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default:
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elprintf(EL_UIO, "unhandled prot cmd %02x @%06x", prot_lk3_cmd, SekPc);
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break;
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}
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elprintf(EL_UIO, "prot r8 [%06x] %02x @%06x", a, d, SekPc);
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return d;
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}
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static void PicoWrite8_plk3p(u32 a, u32 d)
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{
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elprintf(EL_UIO, "prot w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
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if (a & 2)
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prot_lk3_cmd = d;
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else
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prot_lk3_data = d;
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}
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static void PicoWrite8_plk3b(u32 a, u32 d)
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{
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int addr;
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elprintf(EL_UIO, "prot w8 [%06x] %02x @%06x", a, d & 0xff, SekPc);
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addr = d << 15;
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if (addr + 0x8000 > Pico.romsize) {
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elprintf(EL_UIO|EL_ANOMALY, "prot_lk3: bank too large: %02x", d);
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return;
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}
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if (addr == 0)
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memcpy(Pico.rom, Pico.rom + Pico.romsize, 0x8000);
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else
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memcpy(Pico.rom, Pico.rom + addr, 0x8000);
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}
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static void carthw_prot_lk3_mem_setup(void)
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{
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cpu68k_map_set(m68k_read8_map, 0x600000, 0x7fffff, PicoRead8_plk3, 1);
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cpu68k_map_set(m68k_write8_map, 0x600000, 0x6fffff, PicoWrite8_plk3p, 1);
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cpu68k_map_set(m68k_write8_map, 0x700000, 0x7fffff, PicoWrite8_plk3b, 1);
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}
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void carthw_prot_lk3_startup(void)
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{
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void *tmp;
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elprintf(EL_STATUS, "lk3 prot emu startup");
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// allocate space for bank0 backup
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tmp = realloc(Pico.rom, Pico.romsize + 0x8000);
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if (tmp == NULL)
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{
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elprintf(EL_STATUS, "OOM");
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return;
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}
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Pico.rom = tmp;
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memcpy(Pico.rom + Pico.romsize, Pico.rom, 0x8000);
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PicoCartMemSetup = carthw_prot_lk3_mem_setup;
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}
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@ -15,6 +15,13 @@ void PicoSVPStartup(void);
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void PicoSVPMemSetup(void);
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/* misc */
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void carthw_ssf2_startup(void);
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void carthw_Xin1_startup(void);
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void carthw_realtec_startup(void);
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void carthw_radica_startup(void);
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void carthw_sprot_startup(void);
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void carthw_sprot_new_location(unsigned int a,
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unsigned int mask, unsigned short val, int is_ro);
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void carthw_prot_lk3_startup(void);
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