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megatrix: Allow code to decompress into DRAM

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This commit is contained in:
AJR 2023-03-27 09:21:41 -04:00
parent 988951dac3
commit 714aa4c4c1
1 changed files with 23 additions and 2 deletions
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25
src/mame/skeleton/ct909e_segadvd.cpp
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@ -39,20 +39,39 @@ protected:
virtual void machine_start() override;
virtual void machine_reset() override;
private:
void uart1_data_w(u32 data);
u32 uart1_status_r();
void mem_map(address_map &map);
required_device<cpu_device> m_maincpu;
required_device<screen_device> m_screen;
uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
private:
};
void ct909e_megatrix_state::uart1_data_w(u32 data)
{
data &= 0x000000ff;
if (data >= 0x20 && data < 0x7f)
logerror("UART 1 sending '%c'\n", data);
else
logerror("UART 1 sending 0x%02X\n", data);
}
u32 ct909e_megatrix_state::uart1_status_r()
{
return 0x00000006;
}
void ct909e_megatrix_state::mem_map(address_map &map)
{
map(0x00000000, 0x003fffff).rom().region("maincpu", 0);
map(0x40000000, 0x407fffff).ram().share("dram");
map(0x80000070, 0x80000073).w(FUNC(ct909e_megatrix_state::uart1_data_w));
map(0x80000074, 0x80000077).r(FUNC(ct909e_megatrix_state::uart1_status_r));
}
uint32_t ct909e_megatrix_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
@ -62,6 +81,7 @@ uint32_t ct909e_megatrix_state::screen_update(screen_device &screen, bitmap_rgb3
void ct909e_megatrix_state::machine_start()
{
m_maincpu->set_state_int(SPARC_PSR, 0xa0000000);
}
void ct909e_megatrix_state::machine_reset()
@ -76,6 +96,7 @@ void ct909e_megatrix_state::megatrix(machine_config &config)
SPARCV8(config, m_maincpu, 100'000'000); // unknown frequency
m_maincpu->set_addrmap(0, &ct909e_megatrix_state::mem_map);
m_maincpu->set_addrmap(0x19, &ct909e_megatrix_state::mem_map);
m_maincpu->set_addrmap(0x1b, &ct909e_megatrix_state::mem_map);
SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
m_screen->set_refresh_hz(60);