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k052109: start adding irq/firq/nmi support

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This commit is contained in:
Dirk Best 2015-08-16 10:23:30 +02:00
parent 0f5344075d
commit 741dd1e705
2 changed files with 64 additions and 7 deletions
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48
src/mame/video/k052109.c
View File

@ -179,7 +179,11 @@ k052109_device::k052109_device(const machine_config &mconfig, const char *tag, d
m_romsubbank(0),
m_scrollctrl(0),
m_char_rom(NULL),
m_char_size(0)
m_char_size(0),
m_screen_tag(NULL),
m_irq_handler(*this),
m_firq_handler(*this),
m_nmi_handler(*this)
{
}
@ -201,11 +205,21 @@ void k052109_device::set_ram(device_t &device, bool ram)
void k052109_device::device_start()
{
memory_region *ROM = region();
if (ROM != NULL)
if (m_screen_tag != NULL)
{
m_char_rom = ROM->base();
m_char_size = ROM->bytes();
// make sure our screen is started
screen_device *screen = m_owner->subdevice<screen_device>(m_screen_tag);
if (!screen->started())
throw device_missing_dependencies();
// and register a callback for vblank state
screen->register_vblank_callback(vblank_state_delegate(FUNC(k052109_device::vblank_callback), this));
}
if (region() != NULL)
{
m_char_rom = region()->base();
m_char_size = region()->bytes();
}
decode_gfx();
@ -234,6 +248,11 @@ void k052109_device::device_start()
// bind callbacks
m_k052109_cb.bind_relative_to(*owner());
// resolve callbacks
m_irq_handler.resolve_safe();
m_firq_handler.resolve_safe();
m_nmi_handler.resolve_safe();
save_pointer(NAME(m_ram), 0x6000);
save_item(NAME(m_rmrd_line));
save_item(NAME(m_romsubbank));
@ -265,10 +284,27 @@ void k052109_device::device_reset()
}
}
//-------------------------------------------------
// set_screen_tag - set screen we are attached to
//-------------------------------------------------
void k052109_device::set_screen_tag(device_t &device, device_t *owner, const char *tag)
{
k052109_device &dev = dynamic_cast<k052109_device &>(device);
dev.m_screen_tag = tag;
}
/*****************************************************************************
DEVICE HANDLERS
*****************************************************************************/
void k052109_device::vblank_callback(screen_device &screen, bool state)
{
if (state)
m_irq_handler(ASSERT_LINE);
}
READ8_MEMBER( k052109_device::read )
{
if (m_rmrd_line == CLEAR_LINE)
@ -351,6 +387,8 @@ WRITE8_MEMBER( k052109_device::write )
/* bit 2 = irq enable */
/* the custom chip can also generate NMI and FIRQ, for use with a 6809 */
m_irq_enabled = data & 0x04;
if (m_irq_enabled)
m_irq_handler(CLEAR_LINE);
}
else if (offset == 0x1d80)
{

23
src/mame/video/k052109.h
View File

@ -13,8 +13,14 @@ typedef device_delegate<void (int layer, int bank, int *code, int *color, int *f
#define MCFG_K052109_CHARRAM(_ram) \
k052109_device::set_ram(*device, _ram);
class k052109_device : public device_t,
public device_gfx_interface
#define MCFG_K052109_SCREEN_TAG(_tag) \
k052109_device::set_screen_tag(*device, owner, _tag);
#define MCFG_K052109_IRQ_HANDLER(_devcb) \
devcb = &k052109_device::set_irq_handler(*device, DEVCB_##_devcb);
class k052109_device : public device_t, public device_gfx_interface
{
static const gfx_layout charlayout;
static const gfx_layout charlayout_ram;
@ -25,8 +31,12 @@ public:
k052109_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~k052109_device() {}
template<class _Object> static devcb_base &set_irq_handler(device_t &device, _Object object)
{ return downcast<k052109_device &>(device).m_irq_handler.set_callback(object); }
static void set_k052109_callback(device_t &device, k052109_cb_delegate callback) { downcast<k052109_device &>(device).m_k052109_cb = callback; }
static void set_ram(device_t &device, bool ram);
static void set_screen_tag(device_t &device, device_t *owner, const char *tag);
/*
The callback is passed:
@ -57,10 +67,13 @@ public:
void tilemap_mark_dirty(int tmap_num);
void tilemap_draw(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int tmap_num, UINT32 flags, UINT8 priority);
void vblank_callback(screen_device &screen, bool state);
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
private:
// internal state
UINT8 *m_ram;
@ -86,8 +99,14 @@ private:
UINT8 *m_char_rom;
UINT32 m_char_size;
const char *m_screen_tag;
k052109_cb_delegate m_k052109_cb;
devcb_write_line m_irq_handler;
devcb_write_line m_firq_handler;
devcb_write_line m_nmi_handler;
TILE_GET_INFO_MEMBER(get_tile_info0);
TILE_GET_INFO_MEMBER(get_tile_info1);
TILE_GET_INFO_MEMBER(get_tile_info2);