Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-04-19 15:11:37 +03:00
Code Issues Actions 3 Packages Projects Releases Wiki Activity

(MESS) apfm1000 / apfimag: more accurate support for on-cart 1K RAM in

Browse Source 
Space Destroyer (no more need of using -ramsize 1K option at launch).
[Fabio Priuli]
This commit is contained in:
Fabio Priuli 2014-05-03 17:44:13 +00:00
parent 59f9b55f48
commit b8d93793ad
2 changed files with 62 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
hash/apfm1000.xml
View File

@ -162,6 +162,8 @@ $9C00 to $9FFF 1k empty space (39936 to 40959)
<rom name="apf1013a.bin" size="4096" crc="f25215a0" sha1="72da492092b883eb31cffb41ea353e919c86d285" offset="0" />
<rom name="apf1013b.bin" size="2048" crc="8c3a9faa" sha1="b3cfc23c65558ef7b67c9afa01a306c8123e227f" offset="0x1000" />
</dataarea>
<dataarea name="ram" size="1024">
</dataarea>
</part>
</software>

74
src/mess/drivers/apf.c
View File

@ -26,16 +26,13 @@ APF M1000/MP1000 and Imagination Machine
RAM switch
----------
- The M1000 only had available the 1K video ram (0000-03FF)
- Space Destroyer needs more, so it includes another 1K in the cart (-ram 1K to enable it)
- Space Destroyer needs more, so it includes another 1K in the cart
- The MPA-10 base includes 8K of RAM (A000-BFFF) (-ram 8K)
- A very few games need 16K which requires hacking the pcb (-ram 16K)
- Basic will work with 8K or 16K.
- On the M1000, only the 1K option has any affect. 8K and 16K are ignored.
- On the IMAG, all ram switches work, however the 1K option gives you 9K. This is because
the MPA-10 8K ram is always there.
- On the M1000, ram options (8K and 16K) are ignored.
- On the IMAG, ram options (8K and 16K) work.
Status of cart-based games
@ -54,7 +51,7 @@ hangman - works
pinball - works
movblock - works
rocket patrol - works, some bad colours
space destroyer - works but you must use -ram 1K option
space destroyer - works
ufo - works
@ -90,6 +87,7 @@ class apf_state : public driver_device
public:
apf_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag)
, m_has_cart_ram(false)
, m_p_videoram(*this, "videoram")
, m_maincpu(*this, "maincpu")
, m_ram(*this, RAM_TAG)
@ -111,12 +109,14 @@ public:
DECLARE_WRITE8_MEMBER(apf_dischw_w);
DECLARE_READ8_MEMBER(serial_r);
DECLARE_WRITE8_MEMBER(serial_w);
DECLARE_DEVICE_IMAGE_LOAD_MEMBER(apf_cart);
private:
UINT8 m_latch;
UINT8 m_keyboard_data;
UINT8 m_pad_data;
UINT8 m_portb;
bool m_ca2;
bool m_has_cart_ram;
virtual void machine_reset();
required_shared_ptr<UINT8> m_p_videoram;
required_device<m6800_cpu_device> m_maincpu;
@ -127,6 +127,7 @@ private:
optional_device<pia6821_device> m_pia1;
optional_device<cassette_image_device> m_cass;
optional_device<wd1770_device> m_fdc;
dynamic_buffer m_cart_ram;
};
@ -136,11 +137,11 @@ READ8_MEMBER( apf_state::videoram_r )
{
// Need the cpu and crtc to be locked together for proper graphics
// This is a hack to fix Rocket Patrol and Blackjack
if (BIT(m_pad_data, 6) && (m_ram->size() != 1*1024))
if (BIT(m_pad_data, 6) && !m_has_cart_ram)
offset -= 0x400;
// This is a hack to fix Space Destroyer
if (BIT(m_pad_data, 6) && (m_ram->size() == 1*1024))
if (BIT(m_pad_data, 6) && m_has_cart_ram)
offset -= 0x120;
UINT16 part1 = offset & 0x1f;
@ -245,11 +246,11 @@ void apf_state::machine_reset()
space.write_byte(0xa002, 0xe5);
}
/* 1K indicates special mapping for space destroyer */
if (m_ram->size() == 1*1024)
/* Space Destroyer has 1K of on-cart RAM */
if (m_has_cart_ram)
{
space.unmap_readwrite(0x9800, 0x9fff);
space.install_ram(0x9800, 0x9bff, m_ram->pointer());
space.install_ram(0x9800, 0x9bff, m_cart_ram);
}
}
@ -476,6 +477,51 @@ static INPUT_PORTS_START( apfimag )
PORT_BIT(0xff, 0xff, IPT_UNUSED)
INPUT_PORTS_END
DEVICE_IMAGE_LOAD_MEMBER( apf_state, apf_cart )
{
UINT8 *ROM = memregion("cart")->base();
UINT32 cart_size;
if (image.software_entry() == NULL)
{
cart_size = image.length();
if (cart_size > 0x3800)
{
logerror("%s extends beyond the expected size for an APF cart.\n", image.filename());
return IMAGE_INIT_FAIL;
}
image.fread(ROM, cart_size);
// attempt to identify Space Destroyer, which needs 1K of additional RAM
if (cart_size == 0x1800)
{
m_has_cart_ram = true;
m_cart_ram.resize(0x400);
}
}
else
{
cart_size = image.get_software_region_length("rom");
if (cart_size > 0x3800)
{
logerror("%s extends beyond the expected size for an APF cart.\n", image.filename());
return IMAGE_INIT_FAIL;
}
memcpy(ROM, image.get_software_region("rom"), cart_size);
if (image.get_software_region("ram"))
{
m_has_cart_ram = true;
m_cart_ram.resize(image.get_software_region_length("ram"));
}
}
return IMAGE_INIT_PASS;
}
static LEGACY_FLOPPY_OPTIONS_START(apfimag)
LEGACY_FLOPPY_OPTION(apfimag, "apd", "APF disk image", basicdsk_identify_default, basicdsk_construct_default, NULL,
HEADS([1])
@ -535,10 +581,11 @@ static MACHINE_CONFIG_START( apfm1000, apf_state )
/* internal ram */
MCFG_RAM_ADD(RAM_TAG)
MCFG_RAM_DEFAULT_SIZE("8K")
MCFG_RAM_EXTRA_OPTIONS("1K,16K")
MCFG_RAM_EXTRA_OPTIONS("16K")
MCFG_CARTSLOT_ADD("cart")
MCFG_CARTSLOT_INTERFACE("apfm1000_cart")
MCFG_CARTSLOT_LOAD(apf_state, apf_cart)
/* software lists */
MCFG_SOFTWARE_LIST_ADD("cart_list","apfm1000")
@ -584,7 +631,6 @@ ROM_START(apfm1000)
ROMX_LOAD("mod_bios.bin", 0x0000, 0x1000, CRC(f320aba6) SHA1(9442349fca8b001a5765e2fe8b84db4ece7886c1), ROM_BIOS(3) )
ROM_REGION(0x3800,"cart", ROMREGION_ERASEFF)
ROM_CART_LOAD("cart", 0x0000, 0x3800, ROM_OPTIONAL)
ROM_END
#define rom_apfimag rom_apfm1000