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on behalf of David Haywood:

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Added Astro Fighter wire hack to Tomahawk as well, and documented that some Tomahawks appear to have the Astro Fighter PROM. [David Haywood]
This commit is contained in:
Fabio Priuli 2009-12-10 14:40:17 +00:00
parent 4a396461b3
commit e34fbfef2a
1 changed files with 45 additions and 2 deletions
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47
src/mame/drivers/astrof.c
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@ -40,9 +40,19 @@
I have played one that stoped between waves to show the next enemy
Known issues/to-do's:
* Is Astro Fighter supposed to have a blue background???
* Analog sound in all games
About Colours:
* It was fairly common to have wiremods on these PCBs to change the
background colours, this is why you see Astro Fighter and Tomahawk
games with both Blue and Black backgrounds. By default MAME
emulates an unmodified PCB, you can enable the hacks in the DRIVER
CONFIGURATION menu.
Versions of Tomahawk using the Astro Fighter PROM have been seen,
see notes in ROM loading.
****************************************************************************/
@ -234,10 +244,36 @@ static void tomahawk_get_pens( running_machine *machine, pen_t *pens )
{
offs_t i;
UINT8 *prom = memory_region(machine, "proms");
UINT8 config = input_port_read_safe(machine, "FAKE", 0x00);
for (i = 0; i < TOMAHAWK_NUM_PENS; i++)
{
UINT8 data = prom[i];
UINT8 data;
UINT8 pen;
/* a common wire hack to the pcb causes the prom halves to be inverted */
/* this results in e.g. astrof background being black */
switch (config)
{
case 0:
/* normal PROM access */
pen = i;
break;
case 1:
/* invert PROM acess */
pen = i ^ 0x10;
break;
case 2:
/* force low */
pen = i & 0x0f;
break;
default:
/* force high */
pen = i | 0x10;
break;
}
data = prom[pen];
pens[i] = make_pen(machine, data);
}
@ -842,6 +878,8 @@ INPUT_PORTS_END
static INPUT_PORTS_START( tomahawk )
PORT_INCLUDE( astrof_common )
PORT_START("IN")
PORT_BIT( 0x1f, IP_ACTIVE_HIGH, IPT_SPECIAL ) PORT_CUSTOM(tomahawk_controls_r, NULL)
PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_START1 )
@ -1231,6 +1269,11 @@ ROM_START( tomahawk )
ROM_REGION( 0x0020, "proms", 0 )
ROM_LOAD( "t777.clr", 0x0000, 0x0020, CRC(d6a528fd) SHA1(5fc08252a2d7c5405f601efbfb7d84bec328d733) )
// versions of this have also been seen using the standard Astro Fighter PROM, giving a blue submarine
// in blue water, with pink / yellow borders. I think these are just unofficial conversions of Astro
// Fighter without the PROM properly replaced tho.
//ROM_LOAD( "astrf.clr", 0x0000, 0x0020, CRC(61329fd1) SHA1(15782d8757d4dda5a8b97815e94c90218f0e08dd) )
ROM_END