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megadriv_acbl.cpp: forgot to commit a line and also some little aid for studying twinktmb (nw)

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Ivan Vangelista 2019-01-11 23:34:56 +01:00
parent f5de528ee3
commit a003328dcf
1 changed files with 5 additions and 2 deletions
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7
src/mame/drivers/megadriv_acbl.cpp
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@ -309,7 +309,7 @@ WRITE16_MEMBER(md_boot_state::aladmdb_w )
- aladmdb_w : 1b2d18 - data = aa00 (only once on reset) - aladmdb_w : 1b2d18 - data = aa00 (only once on reset)
- aladmdb_w : 1b2d42 - data = 0000 (only once on reset) - aladmdb_w : 1b2d42 - data = 0000 (only once on reset)
*/ */
//logerror("aladmdb_w : %06x - data = %04x\n",m_maincpu->pc(),data); logerror("aladmdb_w : %06x - data = %04x\n",m_maincpu->pc(),data);
} }
READ16_MEMBER(md_boot_state::aladmdb_r ) READ16_MEMBER(md_boot_state::aladmdb_r )
@ -351,7 +351,9 @@ READ16_MEMBER(md_boot_state::twinktmb_r )
{ {
if (m_maincpu->pc()==0x02f81e) if (m_maincpu->pc()==0x02f81e)
{ {
return machine().rand() & 0xffff; // TODO: obviously wrong, rand() gets in game uint16_t ret = machine().rand() & 0xffff;
logerror("%04x\n", ret);
return ret; // TODO: obviously wrong, rand() gets in game
} }
if (m_maincpu->pc()==0x02f84e) return 0x0000; // what's this? if (m_maincpu->pc()==0x02f84e) return 0x0000; // what's this?
@ -1065,6 +1067,7 @@ void md_boot_state::init_twinktmb()
rom[0x06] = 0xcc; rom[0x06] = 0xcc;
init_sonic2mb(); init_sonic2mb();
m_maincpu->space(AS_PROGRAM).install_read_handler(0x300000, 0x300001, read16_delegate(FUNC(md_boot_state::twinktmb_r),this));
} }
/************************************* /*************************************