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(MESS) a2600.c: Added support for 8in1. (Wilbert Pol)

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This commit is contained in:
Wilbert Pol 2012-10-07 19:34:19 +00:00
parent 68c1ebe094
commit 0f9ab8ce82
2 changed files with 48 additions and 4 deletions
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6
hash/a2600.xml
View File

@ -247,12 +247,14 @@ Info from Atariage and Atarimania
</part>
</software>
<software name="8in1" supported="no">
<!-- Known 'feature': Centipede doesn't work -->
<software name="8in1">
<description>8 in 1 - Asteroids + Centipede + BattleZone + SwordQuest - EarthWorld + SwordQuest - FireWorld + RealSports Soccer + RealSports Tennis + Yars' Revenge (Prototype 19920116)</description>
<year>1988</year>
<publisher>Atari</publisher>
<info name="serial" value="CX26193" />
<part name="cart" interface="a2600_cart">
<feature name="mapper" value="8in1" />
<dataarea name="rom" size="65536">
<rom name="8 in 1 (prototype).bin" size="65536" crc="5ddf79f5" sha1="c066942446c3fc7075ee8430a381d5da4adaec41" offset="0" />
</dataarea>
@ -16938,4 +16940,4 @@ Info from Atariage and Atarimania
</dataarea>
</part>
</software>
</softwarelist>
</softwarelist>

46
src/mess/drivers/a2600.c
View File

@ -2,6 +2,10 @@
Atari VCS 2600 driver
TODO:
- Move the 2 32-in-1 rom dumps into their own driver
- Add 128-in-1 driver
***************************************************************************/
#include "emu.h"
@ -193,7 +197,8 @@ enum
modeFV,
modeDPC,
mode32in1,
modeJVP
modeJVP,
mode8in1
};
static const UINT16 supported_screen_heights[4] = { 262, 312, 328, 342 };
@ -591,10 +596,32 @@ static DEVICE_IMAGE_LOAD( a2600_cart )
state->m_current_bank = 0;
if (image.software_entry() == NULL)
{
image.fread(cart, state->m_cart_size);
}
else
{
memcpy(cart, image.get_software_region("rom"), state->m_cart_size);
const char *mapper = software_part_get_feature((software_part*)image.part_entry(), "mapper");
if ( mapper != NULL )
{
static const struct { const char *mapper_name; int mapper_type; } mapper_types[] =
{
{ "8in1", mode8in1 },
};
for (int i = 0; i < ARRAY_LENGTH(mapper_types) && state->m_banking_mode == 0xff; i++)
{
if (!mame_stricmp(mapper, mapper_types[i].mapper_name))
{
state->m_banking_mode = mapper_types[i].mapper_type;
}
}
}
}
if (!(state->m_cart_size == 0x4000 && detect_modef6(image.device().machine())))
{
while (state->m_cart_size > 0x00800)
@ -616,7 +643,7 @@ int a2600_state::next_bank()
void a2600_state::modeF8_switch(UINT16 offset, UINT8 data)
{
m_bank_base[1] = m_cart + 0x1000 * offset;
m_bank_base[1] = m_cart + 0x2000 * m_current_reset_bank_counter + 0x1000 * offset;
membank("bank1")->set_base(m_bank_base[1]);
}
@ -1879,7 +1906,21 @@ void a2600_state::machine_reset()
install_banks(1, 0x0000);
break;
case mode8in1:
m_current_reset_bank_counter = m_current_reset_bank_counter & 0x07;
if ( m_current_reset_bank_counter == 7 )
{
/* Special case for Yar's Revenge */
install_banks(1, 0x2000 * m_current_reset_bank_counter + 0x0000);
}
else
{
install_banks(1, 0x2000 * m_current_reset_bank_counter + 0x1000);
}
break;
case modeF8:
m_current_reset_bank_counter = 0;
if (!memcmp(&CART_MEMBER[0x1ffc],snowwhite,sizeof(snowwhite)))
{
install_banks(1, 0x0000);
@ -1976,6 +2017,7 @@ void a2600_state::machine_reset()
switch (m_banking_mode)
{
case modeF8:
case mode8in1:
space.install_write_handler(0x1ff8, 0x1ff9, write8_delegate(FUNC(a2600_state::modeF8_switch_w),this));
space.install_read_handler(0x1ff8, 0x1ff9, read8_delegate(FUNC(a2600_state::modeF8_switch_r),this));
break;