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Merge pull request #3914 from DavidHaywood/280818

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dkmb.cpp - notes (nw)
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R. Belmont 2018-08-28 22:25:26 -04:00 committed by GitHub
commit 092a7cc5df
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1 changed files with 61 additions and 7 deletions
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68
src/mame/drivers/dkmb.cpp
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@ -1,5 +1,5 @@
// license:BSD-3-Clause
// copyright-holders:
// copyright-holders:David Haywood
/*
Donkey Kong / Donkey Kong Jr / Mario Bros
@ -36,16 +36,21 @@ class dkmb_state : public driver_device
public:
dkmb_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu")
m_maincpu(*this, "maincpu"),
m_framebuffer(*this, "framebuffer")
{ }
void dkmb(machine_config &config);
DECLARE_READ64_MEMBER(unk_2060000_r);
DECLARE_READ64_MEMBER(unk_20c0010_r);
protected:
virtual void machine_start() override;
private:
required_device<cpu_device> m_maincpu;
required_shared_ptr<uint64_t> m_framebuffer;
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
@ -59,12 +64,53 @@ void dkmb_state::machine_start()
uint32_t dkmb_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
int count = 0;
for (int y = 0; y < 256; y++)
{
uint32_t* dst = &bitmap.pix32(y);
for (int x = 0; x < 1024 / 2; x++)
{
uint64_t val = m_framebuffer[count];
dst[(x * 2) + 0] = (val >> 32) & 0x00ffffff;
dst[(x * 2) + 1] = (val >> 0) & 0x00ffffff;
count++;
}
}
return 0;
}
READ64_MEMBER(dkmb_state::unk_2060000_r)
{
return ((u64)machine().rand()) << 56;
}
READ64_MEMBER(dkmb_state::unk_20c0010_r)
{
return ((u64)machine().rand()) << 56;
}
void dkmb_state::main_map(address_map &map)
{
map(0x00ff0000, 0x00ffffff).ram();
map(0x00000000, 0x000fffff).ram(); // copies code to RAM and runs it from here
map(0x00100000, 0x001fffff).ram().share("framebuffer"); // seems to be a 1024x256 ARGB bitmap, with 320 entries used for each line and 224 lines, so framebuffer? (but then gets overwritten with data not of that format?)
map(0x00e00000, 0x00ffffff).ram(); // size uncertain
map(0x02080000, 0x02080007).ram(); // write
map(0x02060000, 0x02060007).r(FUNC(dkmb_state::unk_2060000_r)); // read
map(0x020c0000, 0x020c0007).ram(); // write
map(0x020c0010, 0x020c0017).r(FUNC(dkmb_state::unk_20c0010_r)); // read
map(0x04090000, 0x0409ffff).ram(); // size uncertain
// map(0xff000000, 0xff0fffff) // looks like flash ROM access, mirror of main ROM or just checking if extra exist?
// map(0xff800000, 0xff8fffff) // looks like flash ROM access, mirror of main ROM or just checking if extra exist?
map(0xffe00000, 0xffffffff).rom().region("maincpu", 0);
}
@ -83,8 +129,8 @@ MACHINE_CONFIG_START(dkmb_state::dkmb)
MCFG_SCREEN_ADD("screen", RASTER) // wrong
MCFG_SCREEN_REFRESH_RATE(60)
MCFG_SCREEN_UPDATE_DRIVER(dkmb_state, screen_update)
MCFG_SCREEN_SIZE(640, 480)
MCFG_SCREEN_VISIBLE_AREA(0, 256, 0, 240)
MCFG_SCREEN_SIZE(1024, 256)
MCFG_SCREEN_VISIBLE_AREA(0, 1024-1, 0, 256-1)
MCFG_PALETTE_ADD("palette", 65536)
@ -95,10 +141,18 @@ MACHINE_CONFIG_END
ROM_START( dkmb )
ROM_REGION64_BE(0x200000, "maincpu", 0)
ROM_LOAD("donkeykong.u14", 0x00000, 0x200000, CRC(7895fe2d) SHA1(134174c02ce3c5d28a890ca57dc36677873b1dc8) )
ROM_LOAD("donkeykong.u14", 0x00000, 0x200000, CRC(7895fe2d) SHA1(134174c02ce3c5d28a890ca57dc36677873b1dc8) ) // what type of ROM is this?
ROM_REGION( 0x1000, "pic", 0 )
ROM_LOAD("12c508.u12", 0x000, 0x09db, CRC(3adb3e33) SHA1(36a96886d83b64633eea83e57bdfa8a20c6d4f6a) )
/*
Intel HEX format dump. When converted to binary using
"srec_cat.exe 12c508.u12 -intel -o 12c508.bin -binary"
this contains only the string
"Copyright 2001 Core Technologies why are you looking in here?"
in the first 0x80 bytes, which is the unprotected area of the PIC.
the rest is blank, therefore protected and a bad dump
*/
ROM_LOAD("12c508.u12", 0x000, 0x09db, BAD_DUMP CRC(3adb3e33) SHA1(36a96886d83b64633eea83e57bdfa8a20c6d4f6a) )
ROM_END
GAME( 2003, dkmb, 0, dkmb, dkmb, dkmb_state, empty_init, ROT270, "Namco / Nintendo / Cosmodog", "Donkey Kong / Donkey Kong Jr / Mario Bros", MACHINE_IS_SKELETON )