diff options
Diffstat (limited to 'src/mess/drivers/pc9801.c')
-rw-r--r-- | src/mess/drivers/pc9801.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/mess/drivers/pc9801.c b/src/mess/drivers/pc9801.c index 3576ce68bd0..17bce6e5b1a 100644 --- a/src/mess/drivers/pc9801.c +++ b/src/mess/drivers/pc9801.c @@ -3349,9 +3349,12 @@ MACHINE_START_MEMBER(pc9801_state,pc9801rs) { address_space& space = m_maincpu->space(AS_PROGRAM); membank("wram")->set_base(m_ram->pointer()); - 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); + if(m_ram_size) + { + 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(); |