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pic8259 - Kill me but this is how it works (no whatsnew)

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This commit is contained in:
Miodrag Milanovic 2011-07-05 14:18:13 +00:00
parent 4de1794181
commit 10db9b3a8f
2 changed files with 37 additions and 5 deletions
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38
src/emu/machine/pic8259.c
View File

@ -71,12 +71,14 @@ struct pic8259
UINT32 mode : 2;
UINT32 auto_eoi : 1;
UINT32 is_x86 : 1;
UINT8 variant; // 0 - 8259, 1 - 8259A
};
INLINE pic8259_t *get_safe_token(device_t *device) {
assert( device != NULL );
assert( device->type() == PIC8259 );
assert( device->type() == PIC8259 || device->type() == PIC8259A);
return ( pic8259_t *) downcast<legacy_device_base *>(device)->token();
}
@ -146,7 +148,7 @@ static void pic8259_set_irq_line(device_t *device, int irq, int state)
pic8259->irq_lines &= ~mask;
pic8259->irr &= ~mask;
}
if (pic8259->variant==0) pic8259->irr = pic8259->irq_lines;
pic8259_set_timer(pic8259);
}
@ -422,8 +424,8 @@ static DEVICE_START( pic8259 )
pic8259->read_slave_ack_func.resolve(intf->read_slave_ack_func, *device);
}
static DEVICE_RESET( pic8259 ) {
static void common_reset(device_t *device,int variant)
{
pic8259_t *pic8259 = get_safe_token(device);
pic8259->state = STATE_READY;
@ -448,6 +450,13 @@ static DEVICE_RESET( pic8259 ) {
pic8259->vector_addr_high = 0;
pic8259->master = pic8259->sp_en_func();
pic8259->variant = variant;
}
static DEVICE_RESET( pic8259 )
{
common_reset(device, 0);
}
@ -471,5 +480,24 @@ DEVICE_GET_INFO( pic8259 ) {
}
}
DEFINE_LEGACY_DEVICE(PIC8259, pic8259);
static DEVICE_RESET( pic8259a )
{
common_reset(device, 1);
}
DEVICE_GET_INFO( pic8259a )
{
switch ( state )
{
/* --- the following bits of info are returned as 64-bit signed integers --- */
case DEVINFO_STR_NAME: strcpy(info->s, "PIC8259A"); break;
/* --- the following bits of info are returned as pointers to data or functions --- */
case DEVINFO_FCT_RESET: info->start = DEVICE_RESET_NAME(pic8259a); break;
default: DEVICE_GET_INFO_CALL(pic8259); break;
}
}
DEFINE_LEGACY_DEVICE(PIC8259A, pic8259a);

4
src/emu/machine/pic8259.h
View File

@ -29,6 +29,7 @@
#include "devcb.h"
DECLARE_LEGACY_DEVICE(PIC8259, pic8259);
DECLARE_LEGACY_DEVICE(PIC8259A, pic8259a);
/***************************************************************************
TYPE DEFINITIONS
@ -53,6 +54,9 @@ struct pic8259_interface
MCFG_DEVICE_ADD(_tag, PIC8259, 0) \
MCFG_DEVICE_CONFIG(_intrf)
#define MCFG_PIC8259A_ADD(_tag, _intrf) \
MCFG_DEVICE_ADD(_tag, PIC8259A, 0) \
MCFG_DEVICE_CONFIG(_intrf)
/* device interface */
READ8_DEVICE_HANDLER( pic8259_r );