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bmcbowl: Add missing video-related interrupt; reguess VIA clock

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This commit is contained in:
AJR 2019-05-10 17:24:11 -04:00
parent 5e7a917db1
commit 1bcf4cc224
1 changed files with 12 additions and 5 deletions
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17
src/mame/drivers/bmcbowl.cpp
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@ -135,7 +135,7 @@ private:
virtual void machine_start() override;
virtual void machine_reset() override;
DECLARE_READ16_MEMBER(random_read);
uint8_t random_read();
DECLARE_READ16_MEMBER(protection_r);
DECLARE_WRITE16_MEMBER(scroll_w);
DECLARE_READ8_MEMBER(via_b_in);
@ -144,6 +144,7 @@ private:
DECLARE_WRITE_LINE_MEMBER(via_ca2_out);
DECLARE_READ8_MEMBER(dips1_r);
DECLARE_WRITE8_MEMBER(input_mux_w);
void int_ack_w(uint8_t data);
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
void init_stats(const uint8_t *table, int table_len, int address);
void main_mem(address_map &map);
@ -209,7 +210,7 @@ uint32_t bmcbowl_state::screen_update(screen_device &screen, bitmap_rgb32 &bitma
return 0;
}
READ16_MEMBER(bmcbowl_state::random_read)
uint8_t bmcbowl_state::random_read()
{
return machine().rand();
}
@ -302,6 +303,11 @@ void bmcbowl_state::init_stats(const uint8_t *table, int table_len, int address)
}
#endif
void bmcbowl_state::int_ack_w(uint8_t data)
{
m_maincpu->set_input_line(M68K_IRQ_2, CLEAR_LINE);
}
void bmcbowl_state::machine_start()
{
save_item(NAME(m_selected_input));
@ -353,7 +359,7 @@ void bmcbowl_state::main_mem(address_map &map)
map(0x30c0c0, 0x30c0c1).nopw();
map(0x30c100, 0x30c101).r(FUNC(bmcbowl_state::protection_r));
map(0x30c140, 0x30c141).nopw();
map(0x30ca00, 0x30ca01).r(FUNC(bmcbowl_state::random_read)).nopw();
map(0x30ca01, 0x30ca01).rw(FUNC(bmcbowl_state::random_read), FUNC(bmcbowl_state::int_ack_w));
}
@ -473,7 +479,8 @@ void bmcbowl_state::bmcbowl(machine_config &config)
screen.set_size(35*8, 30*8);
screen.set_visarea(0*8, 35*8-1, 0*8, 29*8-1);
screen.set_screen_update(FUNC(bmcbowl_state::screen_update));
screen.screen_vblank().set_inputline(m_maincpu, M68K_IRQ_2, HOLD_LINE);
screen.screen_vblank().set_inputline(m_maincpu, M68K_IRQ_2, ASSERT_LINE); // probably not the source of this interrupt
screen.screen_vblank().append("via6522_0", FUNC(via6522_device::write_cb1));
PALETTE(config, m_palette).set_entries(256);
ramdac_device &ramdac(RAMDAC(config, "ramdac", 0, m_palette));
@ -499,7 +506,7 @@ void bmcbowl_state::bmcbowl(machine_config &config)
oki.add_route(ALL_OUTPUTS, "rspeaker", 0.50);
/* via */
via6522_device &via(VIA6522(config, "via6522_0", 1000000));
via6522_device &via(VIA6522(config, "via6522_0", XTAL(3'579'545) / 4)); // clock not verified (controls music tempo)
via.readpb_handler().set(FUNC(bmcbowl_state::via_b_in));
via.writepa_handler().set(FUNC(bmcbowl_state::via_a_out));
via.writepb_handler().set(FUNC(bmcbowl_state::via_b_out));