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AmigActive 10
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AACD 10.iso
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AACD
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MAME
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src
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machine
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starfire.c
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C/C++ Source or Header
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2000-04-04
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2KB
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128 lines
/***************************************************************************
machine.c
Functions to emulate general aspects of the machine (RAM, ROM, interrupts,
I/O ports)
***************************************************************************/
#include "driver.h"
static int sound_ctrl;
static int fireone_sell;
/* In drivers/starfire.c */
extern unsigned char *starfire_ram;
/* In vidhrdw/starfire.c */
WRITE_HANDLER( starfire_vidctrl_w );
WRITE_HANDLER( starfire_vidctrl1_w );
WRITE_HANDLER( starfire_shadow_w )
{
starfire_ram[offset & 0x3ff] = data;
}
WRITE_HANDLER( starfire_output_w )
{
starfire_ram[offset & 0x3ff] = data;
switch(offset & 0xf) {
case 0:
starfire_vidctrl_w(0, data);
break;
case 1:
starfire_vidctrl1_w(0, data);
break;
case 2:
/* Sounds */
break;
}
}
WRITE_HANDLER( fireone_output_w )
{
starfire_ram[offset & 0x3ff] = data;
switch(offset & 0xf) {
case 0:
starfire_vidctrl_w(0, data);
break;
case 1:
starfire_vidctrl1_w(0, data);
break;
case 2:
/* Sounds */
fireone_sell = (data & 0x8) ? 0 : 1;
break;
}
}
READ_HANDLER( starfire_shadow_r )
{
return starfire_ram[offset & 0x3ff];
}
READ_HANDLER( starfire_input_r )
{
switch(offset & 0xf) {
case 0:
return input_port_0_r(0);
case 1:
/* Note : need to loopback sounds lengths on that one */
return input_port_1_r(0);
case 5:
/* Throttle, should be analog too */
return input_port_4_r(0);
case 6:
return input_port_2_r(0);
case 7:
return input_port_3_r(0);
default:
return 0xff;
}
}
READ_HANDLER( fireone_input_r )
{
switch(offset & 0xf) {
case 0:
return input_port_0_r(0);
case 1:
return input_port_1_r(0);
case 2:
/* Throttle, should be analog too */
return fireone_sell ? input_port_2_r(0) : input_port_3_r(0);
default:
return 0xff;
}
}
WRITE_HANDLER( starfire_soundctrl_w ) {
sound_ctrl = data;
}
READ_HANDLER( starfire_io1_r ) {
int in,out;
in = readinputport(1);
out = (in & 0x07) | 0xE0;
if (sound_ctrl & 0x04)
out = out | 0x08;
else
out = out & 0xF7;
if (sound_ctrl & 0x08)
out = out | 0x10;
else
out = out & 0xEF;
return out;
}
int starfire_interrupt (void)
{
return nmi_interrupt();
}