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vectrex: support 64k bankswitched carts and carts with SRAM by mkasick and kbare credited in MESS (no whatsnew)

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This commit is contained in:
Miodrag Milanovic 2012-05-03 18:17:43 +00:00
parent edf9b0df07
commit 89a4191d47
4 changed files with 21 additions and 2 deletions
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4
src/mame/drivers/vectrex.c
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@ -20,7 +20,7 @@ Bruce Tomlin (hardware info)
static ADDRESS_MAP_START(vectrex_map, AS_PROGRAM, 8, vectrex_state )
AM_RANGE(0x0000, 0x7fff) AM_ROM
AM_RANGE(0x0000, 0x7fff) AM_RAMBANK("bank1") AM_REGION("maincpu", 0)
AM_RANGE(0xc800, 0xcbff) AM_RAM AM_MIRROR(0x0400) AM_SHARE("gce_vectorram")
AM_RANGE(0xd000, 0xd7ff) AM_READWRITE(vectrex_via_r, vectrex_via_w)
AM_RANGE(0xe000, 0xffff) AM_ROM
@ -133,7 +133,7 @@ static MACHINE_CONFIG_START( vectrex, vectrex_state )
MACHINE_CONFIG_END
ROM_START(vectrex)
ROM_REGION(0x10000,"maincpu", 0)
ROM_REGION(0x18000,"maincpu", 0)
ROM_LOAD("system.img", 0xe000, 0x2000, CRC(ba13fb57) SHA1(65d07426b520ddd3115d40f255511e0fd2e20ae7))
ROM_END

1
src/mame/includes/vectrex.h
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@ -26,6 +26,7 @@ public:
m_gce_vectorram(*this, "gce_vectorram"){ }
required_shared_ptr<UINT8> m_gce_vectorram;
int m_64k_cart;
int m_imager_status;
UINT32 m_beam_color;
unsigned char m_via_out[2];

10
src/mame/machine/vectrex.c
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@ -71,6 +71,11 @@ DEVICE_IMAGE_LOAD(vectrex_cart)
if (image.software_entry() == NULL)
{
image.fread( mem, 0x8000);
if (image.length() > 0x8000)
{
image.fread( mem+0x10000, 0x8000);
state->m_64k_cart = 1;
}
} else {
int size = image.get_software_region_length("rom");
memcpy(mem, image.get_software_region("rom"), size);
@ -83,6 +88,10 @@ DEVICE_IMAGE_LOAD(vectrex_cart)
return IMAGE_INIT_FAIL;
}
if (memcmp(mem + 0x06,"SRAM",4)) {
image.device().machine().device("maincpu")->memory().space(AS_PROGRAM)->unmap_write(0x0000, 0x7fff);
}
/* If VIA T2 starts, reset refresh timer.
This is the best strategy for most games. */
state->m_reset_refresh = 1;
@ -352,6 +361,7 @@ DRIVER_INIT(vectrex)
vectrex_state *state = machine.driver_data<vectrex_state>();
int i;
state->m_64k_cart = 0;
state->m_imager_angles = unknown_game_angles;
state->m_beam_color = RGB_WHITE;
for (i=0; i<ARRAY_LENGTH(state->m_imager_colors); i++)

8
src/mame/video/vectrex.c
View File

@ -386,6 +386,14 @@ static WRITE8_DEVICE_HANDLER(v_via_pb_w)
}
}
/* Cartridge bank-switching */
if (state->m_64k_cart && ((data ^ state->m_via_out[PORTB]) & 0x40))
{
device_t &root_device = device->machine().root_device();
root_device.membank("bank1")->set_base(root_device.memregion("maincpu")->base() + ((data & 0x40) ? 0x10000 : 0x0000));
}
/* Sound */
if (data & 0x10)
{