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(MESS) cbm2: Address decoding WIP. (nw)

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This commit is contained in:
Curt Coder 2012-09-22 20:55:35 +00:00
parent 58f0fb5d4e
commit e670fdccb4
2 changed files with 62 additions and 40 deletions
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64
src/mess/drivers/cbm2.c
View File

@ -39,13 +39,10 @@
//**************************************************************************
//-------------------------------------------------
// bankswitch -
// read_pla -
//-------------------------------------------------
void cbm2_state::bankswitch(offs_t offset, int busy2, int eras, int ecas, int refen, int cas, int ras, int *sysioen, int *dramen,
int *casseg1, int *casseg2, int *casseg3, int *casseg4, int *buframcs, int *extbufcs, int *vidramcs,
int *diskromcs, int *csbank1, int *csbank2, int *csbank3, int *basiccs, int *knbcs, int *kernalcs,
int *crtccs, int *cs1, int *sidcs, int *extprtcs, int *ciacs, int *aciacs, int *tript1cs, int *tript2cs)
void cbm2_state::read_pla(offs_t offset, int busy2, int eras, int ecas, int refen, int cas, int ras, int *casseg1, int *casseg2, int *casseg3, int *casseg4)
{
UINT32 input = P0 << 15 | P1 << 14 | P2 << 13 | P3 << 12 | busy2 << 11 | eras << 10 | ecas << 9 | refen << 8 | cas << 7 | ras << 6;
UINT32 data = m_pla1->read(input);
@ -58,6 +55,42 @@ void cbm2_state::bankswitch(offs_t offset, int busy2, int eras, int ecas, int re
*casseg4 = BIT(data, 5);
*casseg3 = BIT(data, 6);
//*rasseg3 = BIT(data, 7);
}
void cbm2hp_state::read_pla(offs_t offset, int busy2, int eras, int ecas, int refen, int cas, int ras, int *casseg1, int *casseg2, int *casseg3, int *casseg4)
{
UINT32 input = ras << 13 | cas << 12 | refen << 11 | eras << 10 | ecas << 9 | busy2 << 8 | P3 << 3 | P2 << 2 | P1 << 1 | P0;
UINT32 data = m_pla1->read(input);
*casseg1 = BIT(data, 0);
*casseg2 = BIT(data, 1);
*casseg3 = BIT(data, 2);
*casseg4 = BIT(data, 3);
//*rasseg1 = BIT(data, 4);
//*rasseg2 = BIT(data, 5);
//*rasseg3 = BIT(data, 6);
//*rasseg4 = BIT(data, 7);
}
//-------------------------------------------------
// bankswitch -
//-------------------------------------------------
void cbm2_state::bankswitch(offs_t offset, int busy2, int eras, int ecas, int refen, int cas, int ras, int *sysioen, int *dramen,
int *casseg1, int *casseg2, int *casseg3, int *casseg4, int *buframcs, int *extbufcs, int *vidramcs,
int *diskromcs, int *csbank1, int *csbank2, int *csbank3, int *basiccs, int *knbcs, int *kernalcs,
int *crtccs, int *cs1, int *sidcs, int *extprtcs, int *ciacs, int *aciacs, int *tript1cs, int *tript2cs)
{
//this->read_pla(offset, busy2, eras, ecas, refen, cas, ras, casseg1, casseg2, casseg3, casseg4);
switch (offset >> 16)
{
case 1: *casseg1 = 0; break;
case 2: *casseg2 = 0; break;
case 3: *casseg3 = 0; break;
case 4: *casseg4 = 0; break;
}
int busen1 = m_dramon;
int decoden = 0; // TODO
@ -415,11 +448,6 @@ UINT8 p500_state::read_memory(address_space &space, offs_t offset, offs_t va, in
*/
UINT8 data = 0xff;
if (ae)
{
data = m_vic->bus_r();
}
if (aec && !datxen && !_64kcasen)
{
data = m_ram->pointer()[offset & 0xffff];
@ -1257,7 +1285,7 @@ WRITE8_MEMBER( cbm2_state::tpi2_pb_w )
m_tpi2_pb = data;
}
READ8_MEMBER( cbm2lp_state::tpi2_pc_r )
READ8_MEMBER( cbm2_state::tpi2_pc_r )
{
/*
@ -1344,7 +1372,7 @@ static const tpi6525_interface tpi2_intf =
DEVCB_DRIVER_MEMBER(cbm2_state, tpi2_pa_w),
DEVCB_NULL,
DEVCB_DRIVER_MEMBER(cbm2_state, tpi2_pb_w),
DEVCB_DRIVER_MEMBER(cbm2lp_state, tpi2_pc_r),
DEVCB_DRIVER_MEMBER(cbm2_state, tpi2_pc_r),
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL
@ -1729,7 +1757,7 @@ MACHINE_CONFIG_END
// MACHINE_CONFIG( cbm2lp_ntsc )
//-------------------------------------------------
static MACHINE_CONFIG_START( cbm2lp_ntsc, cbm2lp_state )
static MACHINE_CONFIG_START( cbm2lp_ntsc, cbm2_state )
MCFG_MACHINE_START_OVERRIDE(cbm2_state, cbm2_ntsc)
MCFG_MACHINE_RESET_OVERRIDE(cbm2_state, cbm2)
@ -1780,7 +1808,7 @@ MACHINE_CONFIG_END
// MACHINE_CONFIG( b128 )
//-------------------------------------------------
static MACHINE_CONFIG_START( b128, cbm2lp_state )
static MACHINE_CONFIG_START( b128, cbm2_state )
MCFG_FRAGMENT_ADD(cbm2lp_ntsc)
MCFG_FRAGMENT_ADD(128k)
MACHINE_CONFIG_END
@ -1790,7 +1818,7 @@ MACHINE_CONFIG_END
// MACHINE_CONFIG( b256 )
//-------------------------------------------------
static MACHINE_CONFIG_START( b256, cbm2lp_state )
static MACHINE_CONFIG_START( b256, cbm2_state )
MCFG_FRAGMENT_ADD(cbm2lp_ntsc)
MCFG_FRAGMENT_ADD(256k)
MACHINE_CONFIG_END
@ -1800,7 +1828,7 @@ MACHINE_CONFIG_END
// MACHINE_CONFIG( cbm2lp_pal )
//-------------------------------------------------
static MACHINE_CONFIG_START( cbm2lp_pal, cbm2lp_state )
static MACHINE_CONFIG_START( cbm2lp_pal, cbm2_state )
MCFG_FRAGMENT_ADD(cbm2lp_ntsc)
MCFG_MACHINE_START_OVERRIDE(cbm2_state, cbm2_pal)
@ -1814,7 +1842,7 @@ MACHINE_CONFIG_END
// MACHINE_CONFIG( cbm610 )
//-------------------------------------------------
static MACHINE_CONFIG_START( cbm610, cbm2lp_state )
static MACHINE_CONFIG_START( cbm610, cbm2_state )
MCFG_FRAGMENT_ADD(cbm2lp_pal)
MCFG_FRAGMENT_ADD(128k)
MACHINE_CONFIG_END
@ -1824,7 +1852,7 @@ MACHINE_CONFIG_END
// MACHINE_CONFIG( cbm620 )
//-------------------------------------------------
static MACHINE_CONFIG_START( cbm620, cbm2lp_state )
static MACHINE_CONFIG_START( cbm620, cbm2_state )
MCFG_FRAGMENT_ADD(cbm2lp_pal)
MCFG_FRAGMENT_ADD(256k)
MACHINE_CONFIG_END

38
src/mess/includes/cbm2.h
View File

@ -90,6 +90,8 @@ public:
DECLARE_MACHINE_START( cbm2_pal );
DECLARE_MACHINE_RESET( cbm2 );
virtual void read_pla(offs_t offset, int busy2, int eras, int ecas, int refen, int cas, int ras, int *casseg1, int *casseg2, int *casseg3, int *casseg4);
void bankswitch(offs_t offset, int busy2, int eras, int ecas, int refen, int cas, int ras, int *sysioen, int *dramen,
int *casseg1, int *casseg2, int *casseg3, int *casseg4, int *buframcs, int *extbufcs, int *vidramcs,
int *diskromcs, int *csbank1, int *csbank2, int *csbank3, int *basiccs, int *knbcs, int *kernalcs,
@ -113,6 +115,7 @@ public:
DECLARE_WRITE8_MEMBER( tpi2_pa_w );
DECLARE_WRITE8_MEMBER( tpi2_pb_w );
DECLARE_READ8_MEMBER( tpi2_pc_r );
DECLARE_READ8_MEMBER( cia_pa_r );
DECLARE_WRITE8_MEMBER( cia_pa_w );
@ -151,6 +154,19 @@ public:
};
class cbm2hp_state : public cbm2_state
{
public:
cbm2hp_state(const machine_config &mconfig, device_type type, const char *tag)
: cbm2_state(mconfig, type, tag)
{ }
virtual void read_pla(offs_t offset, int busy2, int eras, int ecas, int refen, int cas, int ras, int *casseg1, int *casseg2, int *casseg3, int *casseg4);
DECLARE_READ8_MEMBER( tpi2_pc_r );
};
class p500_state : public cbm2_state
{
public:
@ -203,27 +219,5 @@ public:
};
class cbm2lp_state : public cbm2_state
{
public:
cbm2lp_state(const machine_config &mconfig, device_type type, const char *tag)
: cbm2_state(mconfig, type, tag)
{ }
DECLARE_READ8_MEMBER( tpi2_pc_r );
};
class cbm2hp_state : public cbm2_state
{
public:
cbm2hp_state(const machine_config &mconfig, device_type type, const char *tag)
: cbm2_state(mconfig, type, tag)
{ }
DECLARE_READ8_MEMBER( tpi2_pc_r );
};
#endif