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(MESS) a2600.c: Made the direct update handler debugger friendly. (nw)

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This commit is contained in:
Wilbert Pol 2012-10-06 18:11:38 +00:00
parent 88577a96d4
commit dd3e7829b7
1 changed files with 38 additions and 26 deletions
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64
src/mess/drivers/a2600.c
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@ -849,7 +849,10 @@ DIRECT_UPDATE_MEMBER(a2600_state::modeF6_opbase)
{
if ( ( address & 0x1FFF ) >= 0x1FF6 && ( address & 0x1FFF ) <= 0x1FF9 )
{
modeF6_switch_w(machine().device("maincpu")->memory().space(AS_PROGRAM), ( address & 0x1FFF ) - 0x1FF6, 0 );
if ( ! direct.space().debugger_access() )
{
modeF6_switch_w(machine().device("maincpu")->memory().space(AS_PROGRAM), ( address & 0x1FFF ) - 0x1FF6, 0 );
}
}
return address;
}
@ -858,15 +861,18 @@ DIRECT_UPDATE_MEMBER(a2600_state::modeSS_opbase)
{
if ( address & 0x1000 )
{
if ( address & 0x800 )
if ( ! direct.space().debugger_access() )
{
direct.explicit_configure(( address & 0xf800 ), ( address & 0xf800 ) | 0x7ff, 0x7ff, m_bank_base[2]);
if ( address & 0x800 )
{
direct.explicit_configure(( address & 0xf800 ), ( address & 0xf800 ) | 0x7ff, 0x7ff, m_bank_base[2]);
}
else
{
direct.explicit_configure(( address & 0xf800 ), ( address & 0xf800 ) | 0x7ff, 0x7ff, m_bank_base[1]);
}
return ~0;
}
else
{
direct.explicit_configure(( address & 0xf800 ), ( address & 0xf800 ) | 0x7ff, 0x7ff, m_bank_base[1]);
}
return ~0;
}
return address;
}
@ -1039,11 +1045,14 @@ TIMER_CALLBACK_MEMBER(a2600_state::modeDPC_timer_callback)
DIRECT_UPDATE_MEMBER(a2600_state::modeDPC_opbase_handler)
{
UINT8 new_bit;
new_bit = ( m_dpc.shift_reg & 0x80 ) ^ ( ( m_dpc.shift_reg & 0x20 ) << 2 );
new_bit = new_bit ^ ( ( ( m_dpc.shift_reg & 0x10 ) << 3 ) ^ ( ( m_dpc.shift_reg & 0x08 ) << 4 ) );
new_bit = new_bit ^ 0x80;
m_dpc.shift_reg = new_bit | ( m_dpc.shift_reg >> 1 );
if ( ! direct.space().debugger_access() )
{
UINT8 new_bit;
new_bit = ( m_dpc.shift_reg & 0x80 ) ^ ( ( m_dpc.shift_reg & 0x20 ) << 2 );
new_bit = new_bit ^ ( ( ( m_dpc.shift_reg & 0x10 ) << 3 ) ^ ( ( m_dpc.shift_reg & 0x08 ) << 4 ) );
new_bit = new_bit ^ 0x80;
m_dpc.shift_reg = new_bit | ( m_dpc.shift_reg >> 1 );
}
return address;
}
@ -1186,20 +1195,23 @@ depending on last byte & 0x20 -> 0x00 -> switch to bank #1
DIRECT_UPDATE_MEMBER(a2600_state::modeFE_opbase_handler)
{
if ( ! m_FETimer )
if ( ! direct.space().debugger_access() )
{
/* Still cheating a bit here by looking bit 13 of the address..., but the high byte of the
cpu should be the last byte that was on the data bus and so should determine the bank
we should switch in. */
m_bank_base[1] = memregion("user1")->base() + 0x1000 * ( ( address & 0x2000 ) ? 0 : 1 );
membank("bank1")->set_base(m_bank_base[1] );
/* and restore old opbase handler */
machine().device("maincpu")->memory().space(AS_PROGRAM).set_direct_update_handler(m_FE_old_opbase_handler);
}
else
{
/* Wait for one memory access to have passed (reading of new PCH either from code or from stack) */
m_FETimer--;
if ( ! m_FETimer )
{
/* Still cheating a bit here by looking bit 13 of the address..., but the high byte of the
cpu should be the last byte that was on the data bus and so should determine the bank
we should switch in. */
m_bank_base[1] = memregion("user1")->base() + 0x1000 * ( ( address & 0x2000 ) ? 0 : 1 );
membank("bank1")->set_base(m_bank_base[1] );
/* and restore old opbase handler */
machine().device("maincpu")->memory().space(AS_PROGRAM).set_direct_update_handler(m_FE_old_opbase_handler);
}
else
{
/* Wait for one memory access to have passed (reading of new PCH either from code or from stack) */
m_FETimer--;
}
}
return address;
}