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Added Co-Processor sub-types to ARM CPU, hooking a special case for VL86C020 used by Acorn Archimedes, nw

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This commit is contained in:
Angelo Salese 2014-04-09 17:36:55 +00:00
parent 1532668b9c
commit a3774a2b9e
4 changed files with 89 additions and 4 deletions
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60
src/emu/cpu/arm/arm.c
View File

@ -248,6 +248,7 @@ arm_be_cpu_device::arm_be_cpu_device(const machine_config &mconfig, const char *
}
void arm_cpu_device::cpu_write32( int addr, UINT32 data )
{
/* Unaligned writes are treated as normal writes */
@ -309,6 +310,20 @@ void arm_cpu_device::SetModeRegister( int mode, int rIndex, UINT32 value )
/***************************************************************************/
void arm_cpu_device::device_config_complete()
{
// inherit a copy of the static data
const arm_interface *intf = reinterpret_cast<const arm_interface *>(static_config());
if (intf != NULL)
*static_cast<arm_interface *>(this) = *intf;
// or set default if none provided
else
{
coprotype = ARM_COPRO_TYPE_UNKNOWN_CP15;
}
}
void arm_cpu_device::device_reset()
{
for ( int i = 0; i < 27; i++ )
@ -413,7 +428,11 @@ void arm_cpu_device::execute_run()
}
else if ((insn & 0x0f000000u) == 0x0e000000u) /* Coprocessor */
{
HandleCoPro(insn);
if(coprotype == 1)
HandleCoProVL86C020(insn);
else
HandleCoPro(insn);
R15 += 4;
}
else if ((insn & 0x0f000000u) == 0x0f000000u) /* Software interrupt */
@ -1363,6 +1382,45 @@ UINT32 arm_cpu_device::DecimalToBCD(UINT32 value)
return accumulator;
}
void arm_cpu_device::HandleCoProVL86C020( UINT32 insn )
{
UINT32 rn=(insn>>12)&0xf;
UINT32 crn=(insn>>16)&0xf;
m_icount -= S_CYCLE;
/* MRC - transfer copro register to main register */
if( (insn&0x0f100010)==0x0e100010 )
{
if(crn == 0) // ID, read only
{
/*
0x41<<24 <- Designer code, Acorn Computer Ltd.
0x56<<16 <- Manufacturer code, VLSI Technology Inc.
0x03<<8 <- Part type, VLC86C020
0x00<<0 <- Revision number, 0
*/
SetRegister(rn, 0x41560300);
debugger_break(machine());
}
else
SetRegister(rn, m_coproRegister[crn]);
}
/* MCR - transfer main register to copro register */
else if( (insn&0x0f100010)==0x0e000010 )
{
if(crn != 0)
m_coproRegister[crn]=GetRegister(rn);
printf("%08x: VL86C020 copro instruction write %08x %d %d\n", R15 & 0x3ffffff, insn,rn,crn);
}
else
{
printf("%08x: Unimplemented VL86C020 copro instruction %08x %d %d\n", R15 & 0x3ffffff, insn,rn,crn);
debugger_break(machine());
}
}
void arm_cpu_device::HandleCoPro( UINT32 insn )
{

19
src/emu/cpu/arm/arm.h
View File

@ -14,6 +14,20 @@
* PUBLIC FUNCTIONS
***************************************************************************************************/
enum
{
ARM_COPRO_TYPE_UNKNOWN_CP15 = 0,
ARM_COPRO_TYPE_VL86C020
};
struct arm_interface
{
UINT8 coprotype;
};
#define ARM_INTERFACE(name) \
const arm_interface (name) =
enum
{
@ -25,7 +39,8 @@ enum
};
class arm_cpu_device : public cpu_device
class arm_cpu_device : public cpu_device,
public arm_interface
{
public:
// construction/destruction
@ -34,6 +49,7 @@ public:
protected:
// device-level overrides
virtual void device_config_complete();
virtual void device_start();
virtual void device_reset();
@ -80,6 +96,7 @@ protected:
void HandleMemSingle(UINT32 insn);
void HandleMemBlock(UINT32 insn);
void HandleCoPro(UINT32 insn);
void HandleCoProVL86C020(UINT32 insn);
UINT32 decodeShift(UINT32 insn, UINT32 *pCarry);
void arm_check_irq_state();
int loadInc(UINT32 pat, UINT32 rbv, UINT32 s);

3
src/emu/machine/aakart.c
View File

@ -138,6 +138,7 @@ void aakart_device::device_timer(emu_timer &timer, device_timer_id id, int param
m_rx = m_keyb_row;
m_out_tx_func(ASSERT_LINE);
}
break;
case 0x3f:
if(m_keyb_enable & 1 && m_keyb_state & 1)
@ -147,6 +148,8 @@ void aakart_device::device_timer(emu_timer &timer, device_timer_id id, int param
m_out_tx_func(ASSERT_LINE);
m_keyb_state = 0;
}
break;
case 0xfd:
m_rx = 0xfd;

11
src/mess/drivers/a310.c
View File

@ -134,6 +134,8 @@ void a310_state::machine_start()
{
archimedes_init();
// reset the DAC to centerline
//m_dac->write_signed8(0x80);
}
@ -160,7 +162,7 @@ INPUT_CHANGED_MEMBER(a310_state::key_stroke)
if(newval && !oldval)
m_kart->send_keycode_down(row_val,col_val);
if(oldval && !newval)
m_kart->send_keycode_up(row_val,col_val);
}
@ -277,7 +279,6 @@ static INPUT_PORTS_START( a310 )
PORT_BIT(0x02, 0x00, IPT_KEYBOARD) PORT_NAME("*") PORT_CHANGED_MEMBER(DEVICE_SELF, a310_state, key_stroke, 0x24) PORT_IMPULSE(1) // (KP?)
PORT_BIT(0x04, 0x00, IPT_KEYBOARD) PORT_NAME("#") PORT_CHANGED_MEMBER(DEVICE_SELF, a310_state, key_stroke, 0x25) PORT_IMPULSE(1) // (KP?)
PORT_START("via1a") /* VIA #1 PORT A */
PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_START) PORT_PLAYER(1)
PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START) PORT_PLAYER(2)
@ -325,10 +326,16 @@ static AAKART_INTERFACE( kart_interface )
DEVCB_DRIVER_LINE_MEMBER(archimedes_state, a310_kart_rx_w)
};
static ARM_INTERFACE( a310_config )
{
ARM_COPRO_TYPE_VL86C020
};
static MACHINE_CONFIG_START( a310, a310_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", ARM, 8000000) /* 8 MHz */
MCFG_CPU_PROGRAM_MAP(a310_mem)
MCFG_CPU_CONFIG(a310_config)
MCFG_AAKART_ADD("kart", 8000000/256, kart_interface) // TODO: frequency