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snesb.cpp: bare minimum protection sim for wldgunsb, making it to boot

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This commit is contained in:
angelosa 2020-08-29 04:06:11 +02:00
parent e1fcb43459
commit c3aab41ad9
1 changed files with 53 additions and 4 deletions
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57
src/mame/drivers/snesb.cpp
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@ -191,6 +191,12 @@ private:
uint8_t rushbets_75axxx_r(offs_t offset);
uint8_t rushbets_5b8e3c_r();
uint8_t sharedram2_r(offs_t offset);
uint8_t wldgunsb_722262_r();
uint8_t wldgunsb_723364_r();
uint8_t wldgunsb_721197_r();
uint8_t wldgunsb_72553b_r();
uint8_t wldgunsb_72443a_r();
void sharedram2_w(offs_t offset, uint8_t data);
uint8_t snesb_dsw1_r();
uint8_t snesb_dsw2_r();
@ -289,7 +295,6 @@ void snesb_state::sharedram2_w(offs_t offset, uint8_t data)
}
/* Rushing Beat Shura */
uint8_t snesb_state::rushbets_75axxx_r(offs_t offset)
{
/* protection checks */
@ -313,6 +318,37 @@ uint8_t snesb_state::rushbets_5b8e3c_r()
return ++m_cnt;
}
/* Wild Guns */
uint8_t snesb_state::wldgunsb_722262_r()
{
// PC 2e2f6
return 0x2b;
}
uint8_t snesb_state::wldgunsb_723364_r()
{
// PC b983
return 0x93;
}
uint8_t snesb_state::wldgunsb_721197_r()
{
// PC 2e30c
return 0xe4;
}
uint8_t snesb_state::wldgunsb_72553b_r()
{
// PC 2e216
return 0xbf;
}
uint8_t snesb_state::wldgunsb_72443a_r()
{
// PC 2e322
return 0x66;
}
/* Generic read handlers for Dip Switches and coins inputs */
uint8_t snesb_state::snesb_dsw1_r()
{
@ -1414,9 +1450,22 @@ void snesb_state::init_wldgunsb()
m_maincpu->space(AS_PROGRAM).install_readwrite_handler(0x781000, 0x781021, read8sm_delegate(*this, FUNC(snesb_state::sharedram_r)), write8sm_delegate(*this, FUNC(snesb_state::sharedram_w)));
//m_maincpu->space(AS_PROGRAM).install_readwrite_handler(0x781200, 0x781221, read8sm_delegate(*this, FUNC(snesb_state::sharedram2_r)), write8sm_delegate(*this, FUNC(snesb_state::sharedram2_w)));
m_maincpu->space(AS_PROGRAM).install_read_handler(0x770073, 0x770073, read8smo_delegate(*this, FUNC(snesb_state::snesb_dsw1_r)));
m_maincpu->space(AS_PROGRAM).install_read_handler(0x770074, 0x770074, read8smo_delegate(*this, FUNC(snesb_state::snesb_dsw2_r)));
//m_maincpu->space(AS_PROGRAM).install_read_handler(0x770079, 0x770079, read8smo_delegate(*this, FUNC(snesb_state::snesb_coin_r)));
m_maincpu->space(AS_PROGRAM).install_read_handler(0x770071, 0x770071, read8smo_delegate(*this, FUNC(snesb_state::snesb_dsw1_r)));
m_maincpu->space(AS_PROGRAM).install_read_handler(0x770072, 0x770072, read8smo_delegate(*this, FUNC(snesb_state::snesb_dsw2_r)));
m_maincpu->space(AS_PROGRAM).install_read_handler(0x770079, 0x770079, read8smo_delegate(*this, FUNC(snesb_state::snesb_coin_r)));
// protection overlays
// counter (PC=0x2dfe7 / 0x2dfee)
m_maincpu->space(AS_PROGRAM).install_read_handler(0x7bf45b, 0x7bf45b, read8smo_delegate(*this, FUNC(snesb_state::sb2b_75bd37_r)));
// these reads with a LDA but discards the upper 8-bit values
// POST
m_maincpu->space(AS_PROGRAM).install_read_handler(0x722262, 0x722262, read8smo_delegate(*this, FUNC(snesb_state::wldgunsb_722262_r)));
m_maincpu->space(AS_PROGRAM).install_read_handler(0x723363, 0x723363, read8smo_delegate(*this, FUNC(snesb_state::wldgunsb_723364_r)));
// in-game
m_maincpu->space(AS_PROGRAM).install_read_handler(0x721197, 0x721197, read8smo_delegate(*this, FUNC(snesb_state::wldgunsb_721197_r)));
m_maincpu->space(AS_PROGRAM).install_read_handler(0x72553b, 0x72553b, read8smo_delegate(*this, FUNC(snesb_state::wldgunsb_72553b_r)));
m_maincpu->space(AS_PROGRAM).install_read_handler(0x72443a, 0x72443a, read8smo_delegate(*this, FUNC(snesb_state::wldgunsb_72443a_r)));
init_snes();
}