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(mess) pc9801: don't install memory above 640K if it doesn't exist (nw)

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This commit is contained in:
cracyc 2014-11-02 12:54:03 -06:00
parent 48d04e2464
commit 26d0361693
1 changed files with 6 additions and 3 deletions
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9
src/mess/drivers/pc9801.c
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@ -3349,9 +3349,12 @@ MACHINE_START_MEMBER(pc9801_state,pc9801rs)
{ {
address_space& space = m_maincpu->space(AS_PROGRAM); address_space& space = m_maincpu->space(AS_PROGRAM);
membank("wram")->set_base(m_ram->pointer()); membank("wram")->set_base(m_ram->pointer());
space.install_read_bank(0x100000, 0x100000 + m_ram_size - 1, "ext_wram"); if(m_ram_size)
space.install_write_bank(0x100000, 0x100000 + m_ram_size - 1, "ext_wram"); {
membank("ext_wram")->set_base(m_ram->pointer() + 0xa0000); space.install_read_bank(0x100000, 0x100000 + m_ram_size - 1, "ext_wram");
space.install_write_bank(0x100000, 0x100000 + m_ram_size - 1, "ext_wram");
membank("ext_wram")->set_base(m_ram->pointer() + 0xa0000);
}
} }
m_ide_rom = memregion("ide")->base(); m_ide_rom = memregion("ide")->base();