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author hap <happppp@users.noreply.github.com>2021-01-22 15:47:13 +0100
committer hap <happppp@users.noreply.github.com>2021-01-22 15:47:13 +0100
commit9365219ff3356dc49bf818c269ed97d499365b46 (patch)
treeda40ba01468b6047513eeb00c8ca802d5b5a391c /src/mame/drivers/getaway.cpp
parent205511eea7e39e4d5a6f642bd05a223c023059c6 (diff)
getaway: update notes
Diffstat (limited to 'src/mame/drivers/getaway.cpp')
-rw-r--r--src/mame/drivers/getaway.cpp47
1 files changed, 22 insertions, 25 deletions
diff --git a/src/mame/drivers/getaway.cpp b/src/mame/drivers/getaway.cpp
index 14887e0255b..61e16ea1ff9 100644
--- a/src/mame/drivers/getaway.cpp
+++ b/src/mame/drivers/getaway.cpp
@@ -12,15 +12,18 @@ Hardware notes:
- discrete sound
TODO:
-- sketchy steering wheel emulation, doesn't work properly with regular analog
- field, somehow working with digital;
-- is the gas throttle min/max correct or should "LOW" be more than 0?
+- is the gas throttle min/max correct or should "LOW" be more than 0?;
+- unknown dipswitches, and verify factory defaults;
- several unknowns in the video emulation:
- score layer is a simplification hack, it is unknown how it should really
cope RMW-wise against main layer. It also has wrong colors (different color
- base or overlay artwork, with extra bit output for taking priority?);
- - screen sides presumably needs an overlay artwork (red trees?) or more
- more likely an inverted green bit (which would also turn the trees yellow);
+ base or overlay artwork, with extra bit output for taking priority?).
+ The score background color should change from white(or is it cyan?) to red
+ after Extended Play, the score digits themselves should always be black;
+ - According to flyers, screen sides should have a green background color,
+ it can't be an artwork overlay since it only occurs when the trees are
+ on screen. However, the German flyer contains a cabinet photo and there
+ is no green background. Other flyers could be hand-drawn pictures?;
- do we need to offset X by 1 char-wise? Fills starts from 0x1f;
- video timing is unknown, pixel clock XTAL is 10.816MHz;
- blitter busy flag;
@@ -285,17 +288,17 @@ void getaway_state::io_w(offs_t offset, u8 data)
}
}
-template <unsigned N> u8 getaway_state::input_r(offs_t offset)
-{
- return BIT(m_inputs[N]->read(), offset);
-}
-
u8 getaway_state::busy_r()
{
// TODO: blitter busy?
return 0;
}
+template <unsigned N> u8 getaway_state::input_r(offs_t offset)
+{
+ return BIT(m_inputs[N]->read(), offset);
+}
+
template <unsigned N> u8 getaway_state::dsw_r(offs_t offset)
{
return BIT(m_dsw[N]->read(), offset);
@@ -332,27 +335,22 @@ void getaway_state::io_map(address_map &map)
static INPUT_PORTS_START( getaway )
PORT_START("IN.0")
- PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_COIN1 )
- PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_START1 )
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_COIN1 )
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_START1 )
PORT_START("IN.1")
// TODO: positional/pedal, covers the full 0-0x1f range
// (is all of it actually allowed?)
- PORT_BIT( 0xff, 0x00, IPT_PEDAL ) PORT_MINMAX(0x00,0x1f) PORT_SENSITIVITY(10) PORT_KEYDELTA(15)
+ PORT_BIT( 0x1f, 0x00, IPT_PEDAL ) PORT_MINMAX(0x00, 0x1f) PORT_SENSITIVITY(10) PORT_KEYDELTA(15)
PORT_START("IN.2")
// steering wheel, signed byte, absolute values larger than 8 ignored
PORT_BIT( 0xff, 0x00, IPT_CUSTOM ) PORT_CUSTOM_MEMBER(getaway_state, read_wheel)
PORT_START("WHEEL")
- // TODO: check sensitivity and key delta
- PORT_BIT( 0xff, 0x08, IPT_AD_STICK_X ) PORT_MINMAX(0x00, 0x10) PORT_SENSITIVITY(5) PORT_KEYDELTA(25) // PORT_CENTERDELTA(0)
-
- // dips are two banks, a regular 8 banks one
- // and a tiny 4. They are labeled, hard to read from the provided pic :=(
+ PORT_BIT( 0xff, 0x08, IPT_AD_STICK_X ) PORT_MINMAX(0x00, 0x10) PORT_SENSITIVITY(5) PORT_KEYDELTA(15)
- // "D1S-8"?
- PORT_START("DSW.0")
+ PORT_START("DSW.0") // DTS-8 dipswitch @ location k6
// TODO: defaults for these two, assume they have different quotas?
PORT_DIPNAME( 0x07, 0x02, "Extended Play" )
PORT_DIPSETTING( 0x00, "None" )
@@ -379,8 +377,7 @@ static INPUT_PORTS_START( getaway )
PORT_DIPSETTING( 0x00, DEF_STR( Off ) )
PORT_DIPSETTING( 0x80, DEF_STR( On ) )
- // "DNS04"?
- PORT_START("DSW.1")
+ PORT_START("DSW.1") // DNS04 dipswitch @ location m7
// credit display is shown if both extended plays are on "None"
PORT_DIPNAME( 0x03, 0x00, DEF_STR( Coinage ) )
PORT_DIPSETTING( 0x02, DEF_STR( 2C_1C ) )
@@ -449,5 +446,5 @@ ROM_END
Drivers
******************************************************************************/
-// YEAR NAME PARENT MACHINE INPUT CLASS INIT SCREEN COMPANY, FULLNAME, FLAGS
-GAME( 1979, getaway, 0, getaway, getaway, getaway_state, empty_init, ROT270, "Universal", "Get A Way", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_COLORS | MACHINE_NO_SOUND | MACHINE_IMPERFECT_GRAPHICS | MACHINE_IMPERFECT_CONTROLS )
+// YEAR NAME PARENT MACHINE INPUT CLASS INIT SCREEN COMPANY FULLNAME FLAGS
+GAME( 1979, getaway, 0, getaway, getaway, getaway_state, empty_init, ROT270, "Universal", "Get A Way", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_COLORS | MACHINE_NO_SOUND | MACHINE_IMPERFECT_GRAPHICS )