diff options
Diffstat (limited to 'src/devices/machine/vt82c496.cpp')
-rw-r--r-- | src/devices/machine/vt82c496.cpp | 147 |
1 files changed, 84 insertions, 63 deletions
diff --git a/src/devices/machine/vt82c496.cpp b/src/devices/machine/vt82c496.cpp index f72108d7fe1..cf1632edd49 100644 --- a/src/devices/machine/vt82c496.cpp +++ b/src/devices/machine/vt82c496.cpp @@ -17,7 +17,28 @@ DEFINE_DEVICE_TYPE(VT82C496, vt82c496_device, "vt82c496", "VIA VT82C496 system c vt82c496_device::vt82c496_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) - : device_t(mconfig, VT82C496, tag, owner, clock), m_cpu(*this, finder_base::DUMMY_TAG), m_space(nullptr), m_ram(*this, finder_base::DUMMY_TAG), m_rom(*this, finder_base::DUMMY_TAG), m_reg_select(0) + : device_t(mconfig, VT82C496, tag, owner, clock), m_cpu(*this, finder_base::DUMMY_TAG), m_space(nullptr), m_ram(*this, finder_base::DUMMY_TAG), m_rom(*this, finder_base::DUMMY_TAG), + m_bios_c0_r(*this, "bios_c0_r"), + m_bios_c4_r(*this, "bios_c4_r"), + m_bios_c8_r(*this, "bios_c8_r"), + m_bios_cc_r(*this, "bios_cc_r"), + m_bios_d0_r(*this, "bios_d0_r"), + m_bios_d4_r(*this, "bios_d4_r"), + m_bios_d8_r(*this, "bios_d8_r"), + m_bios_dc_r(*this, "bios_dc_r"), + m_bios_e0_r(*this, "bios_e0_r"), + m_bios_f0_r(*this, "bios_f0_r"), + m_bios_c0_w(*this, "bios_c0_w"), + m_bios_c4_w(*this, "bios_c4_w"), + m_bios_c8_w(*this, "bios_c8_w"), + m_bios_cc_w(*this, "bios_cc_w"), + m_bios_d0_w(*this, "bios_d0_w"), + m_bios_d4_w(*this, "bios_d4_w"), + m_bios_d8_w(*this, "bios_d8_w"), + m_bios_dc_w(*this, "bios_dc_w"), + m_bios_e0_w(*this, "bios_e0_w"), + m_bios_f0_w(*this, "bios_f0_w"), + m_reg_select(0) { } @@ -34,37 +55,37 @@ void vt82c496_device::device_reset() memset(m_reg,0,0x100); // set up default ROM banking - m_space->install_read_bank(0xc0000,0xc3fff,0,"bios_c0_r"); - m_space->install_read_bank(0xc4000,0xc7fff,0,"bios_c4_r"); - m_space->install_read_bank(0xc8000,0xcbfff,0,"bios_c8_r"); - m_space->install_read_bank(0xcc000,0xcffff,0,"bios_cc_r"); - m_space->install_read_bank(0xd0000,0xd3fff,0,"bios_d0_r"); - m_space->install_read_bank(0xd4000,0xd7fff,0,"bios_d4_r"); - m_space->install_read_bank(0xd8000,0xdbfff,0,"bios_d8_r"); - m_space->install_read_bank(0xdc000,0xdffff,0,"bios_dc_r"); - m_space->install_read_bank(0xe0000,0xeffff,0,"bios_e0_r"); - m_space->install_read_bank(0xf0000,0xfffff,0,"bios_f0_r"); + m_space->install_read_bank(0xc0000,0xc3fff,0,m_bios_c0_r); + m_space->install_read_bank(0xc4000,0xc7fff,0,m_bios_c4_r); + m_space->install_read_bank(0xc8000,0xcbfff,0,m_bios_c8_r); + m_space->install_read_bank(0xcc000,0xcffff,0,m_bios_cc_r); + m_space->install_read_bank(0xd0000,0xd3fff,0,m_bios_d0_r); + m_space->install_read_bank(0xd4000,0xd7fff,0,m_bios_d4_r); + m_space->install_read_bank(0xd8000,0xdbfff,0,m_bios_d8_r); + m_space->install_read_bank(0xdc000,0xdffff,0,m_bios_dc_r); + m_space->install_read_bank(0xe0000,0xeffff,0,m_bios_e0_r); + m_space->install_read_bank(0xf0000,0xfffff,0,m_bios_f0_r); m_space->nop_write(0xc0000,0xfffff); - machine().root_device().membank("bios_c0_r")->set_base(m_rom); - machine().root_device().membank("bios_c4_r")->set_base(m_rom+0x4000); - machine().root_device().membank("bios_c8_r")->set_base(m_rom+0x8000); - machine().root_device().membank("bios_cc_r")->set_base(m_rom+0xc000); - machine().root_device().membank("bios_d0_r")->set_base(m_rom+0x10000); - machine().root_device().membank("bios_d4_r")->set_base(m_rom+0x14000); - machine().root_device().membank("bios_d8_r")->set_base(m_rom+0x18000); - machine().root_device().membank("bios_dc_r")->set_base(m_rom+0x1c000); - machine().root_device().membank("bios_e0_r")->set_base(m_rom+0x20000); - machine().root_device().membank("bios_f0_r")->set_base(m_rom+0x30000); + m_bios_c0_r->set_base(m_rom); + m_bios_c4_r->set_base(m_rom+0x4000/4); + m_bios_c8_r->set_base(m_rom+0x8000/4); + m_bios_cc_r->set_base(m_rom+0xc000/4); + m_bios_d0_r->set_base(m_rom+0x10000/4); + m_bios_d4_r->set_base(m_rom+0x14000/4); + m_bios_d8_r->set_base(m_rom+0x18000/4); + m_bios_dc_r->set_base(m_rom+0x1c000/4); + m_bios_e0_r->set_base(m_rom+0x20000/4); + m_bios_f0_r->set_base(m_rom+0x30000/4); } -READ8_MEMBER(vt82c496_device::read) +uint8_t vt82c496_device::read(offs_t offset) { if(offset == 1) return m_reg[m_reg_select]; return 0x00; } -WRITE8_MEMBER(vt82c496_device::write) +void vt82c496_device::write(offs_t offset, uint8_t data) { if(offset == 0) m_reg_select = data; @@ -89,49 +110,49 @@ WRITE8_MEMBER(vt82c496_device::write) void vt82c496_device::update_mem_c0(uint8_t data) { if(data & 0x80) - machine().root_device().membank("bios_cc_r")->set_base(m_ram->pointer()+0xcc000); + m_bios_cc_r->set_base(m_ram->pointer()+0xcc000); else - machine().root_device().membank("bios_cc_r")->set_base(m_rom+0xc000); + m_bios_cc_r->set_base(m_rom+0xc000/4); if(data & 0x40) { - m_space->install_write_bank(0xcc000,0xcffff,0,"bios_cc_w"); - machine().root_device().membank("bios_cc_w")->set_base(m_ram->pointer()+0xcc000); + m_space->install_write_bank(0xcc000,0xcffff,0,m_bios_cc_w); + m_bios_cc_w->set_base(m_ram->pointer()+0xcc000); } else m_space->nop_write(0xcc000,0xcffff); if(data & 0x20) - machine().root_device().membank("bios_c8_r")->set_base(m_ram->pointer()+0xc8000); + m_bios_c8_r->set_base(m_ram->pointer()+0xc8000); else - machine().root_device().membank("bios_c8_r")->set_base(m_rom+0x8000); + m_bios_c8_r->set_base(m_rom+0x8000/4); if(data & 0x10) { - m_space->install_write_bank(0xc8000,0xcbfff,0,"bios_c8_w"); - machine().root_device().membank("bios_c8_w")->set_base(m_ram->pointer()+0xc8000); + m_space->install_write_bank(0xc8000,0xcbfff,0,m_bios_c8_w); + m_bios_c8_w->set_base(m_ram->pointer()+0xc8000); } else m_space->nop_write(0xc8000,0xcbfff); if(data & 0x08) - machine().root_device().membank("bios_c4_r")->set_base(m_ram->pointer()+0xc4000); + m_bios_c4_r->set_base(m_ram->pointer()+0xc4000); else - machine().root_device().membank("bios_c4_r")->set_base(m_rom+0x4000); + m_bios_c4_r->set_base(m_rom+0x4000/4); if(data & 0x04) { - m_space->install_write_bank(0xc4000,0xc7fff,0,"bios_c4_w"); - machine().root_device().membank("bios_c4_w")->set_base(m_ram->pointer()+0xc4000); + m_space->install_write_bank(0xc4000,0xc7fff,0,m_bios_c4_w); + m_bios_c4_w->set_base(m_ram->pointer()+0xc4000); } else m_space->nop_write(0xc4000,0xc7fff); if(data & 0x02) - machine().root_device().membank("bios_c0_r")->set_base(m_ram->pointer()+0xc0000); + m_bios_c0_r->set_base(m_ram->pointer()+0xc0000); else - machine().root_device().membank("bios_c0_r")->set_base(m_rom+0); + m_bios_c0_r->set_base(m_rom+0); if(data & 0x01) { - m_space->install_write_bank(0xc0000,0xc3fff,0,"bios_c0_w"); - machine().root_device().membank("bios_c0_w")->set_base(m_ram->pointer()+0xc0000); + m_space->install_write_bank(0xc0000,0xc3fff,0,m_bios_c0_w); + m_bios_c0_w->set_base(m_ram->pointer()+0xc0000); } else m_space->nop_write(0xc0000,0xc3fff); @@ -140,49 +161,49 @@ void vt82c496_device::update_mem_c0(uint8_t data) void vt82c496_device::update_mem_d0(uint8_t data) { if(data & 0x80) - machine().root_device().membank("bios_dc_r")->set_base(m_ram->pointer()+0xdc000); + m_bios_dc_r->set_base(m_ram->pointer()+0xdc000); else - machine().root_device().membank("bios_dc_r")->set_base(m_rom+0x1c000); + m_bios_dc_r->set_base(m_rom+0x1c000/4); if(data & 0x40) { - m_space->install_write_bank(0xdc000,0xdffff,0,"bios_dc_w"); - machine().root_device().membank("bios_dc_w")->set_base(m_ram->pointer()+0xdc000); + m_space->install_write_bank(0xdc000,0xdffff,0,m_bios_dc_w); + m_bios_dc_w->set_base(m_ram->pointer()+0xdc000); } else m_space->nop_write(0xdc000,0xdffff); if(data & 0x20) - machine().root_device().membank("bios_d8_r")->set_base(m_ram->pointer()+0xd8000); + m_bios_d8_r->set_base(m_ram->pointer()+0xd8000); else - machine().root_device().membank("bios_d8_r")->set_base(m_rom+0x18000); + m_bios_d8_r->set_base(m_rom+0x18000/4); if(data & 0x10) { - m_space->install_write_bank(0xd8000,0xdbfff,0,"bios_d8_w"); - machine().root_device().membank("bios_d8_w")->set_base(m_ram->pointer()+0xd8000); + m_space->install_write_bank(0xd8000,0xdbfff,0,m_bios_d8_w); + m_bios_d8_w->set_base(m_ram->pointer()+0xd8000); } else m_space->nop_write(0xd8000,0xdbfff); if(data & 0x08) - machine().root_device().membank("bios_d4_r")->set_base(m_ram->pointer()+0xd4000); + m_bios_d4_r->set_base(m_ram->pointer()+0xd4000); else - machine().root_device().membank("bios_d4_r")->set_base(m_rom+0x14000); + m_bios_d4_r->set_base(m_rom+0x14000/4); if(data & 0x04) { - m_space->install_write_bank(0xd4000,0xd7fff,0,"bios_d4_w"); - machine().root_device().membank("bios_d4_w")->set_base(m_ram->pointer()+0xd4000); + m_space->install_write_bank(0xd4000,0xd7fff,0,m_bios_d4_w); + m_bios_d4_w->set_base(m_ram->pointer()+0xd4000); } else m_space->nop_write(0xd4000,0xd7fff); if(data & 0x02) - machine().root_device().membank("bios_d0_r")->set_base(m_ram->pointer()+0xd0000); + m_bios_d0_r->set_base(m_ram->pointer()+0xd0000); else - machine().root_device().membank("bios_d0_r")->set_base(m_rom+0x10000); + m_bios_d0_r->set_base(m_rom+0x10000/4); if(data & 0x01) { - m_space->install_write_bank(0xd0000,0xd3fff,0,"bios_d0_w"); - machine().root_device().membank("bios_d0_w")->set_base(m_ram->pointer()+0xd0000); + m_space->install_write_bank(0xd0000,0xd3fff,0,m_bios_d0_w); + m_bios_d0_w->set_base(m_ram->pointer()+0xd0000); } else m_space->nop_write(0xd0000,0xd3fff); @@ -191,27 +212,27 @@ void vt82c496_device::update_mem_d0(uint8_t data) void vt82c496_device::update_mem_e0(uint8_t data) { if(data & 0x80) - machine().root_device().membank("bios_e0_r")->set_base(m_ram->pointer()+0xe0000); + m_bios_e0_r->set_base(m_ram->pointer()+0xe0000); else - machine().root_device().membank("bios_e0_r")->set_base(m_rom+0x20000); + m_bios_e0_r->set_base(m_rom+0x20000/4); if(data & 0x40) { - m_space->install_write_bank(0xe0000,0xeffff,0,"bios_e0_w"); - machine().root_device().membank("bios_e0_w")->set_base(m_ram->pointer()+0xe0000); + m_space->install_write_bank(0xe0000,0xeffff,0,m_bios_e0_w); + m_bios_e0_w->set_base(m_ram->pointer()+0xe0000); } else m_space->nop_write(0xe0000,0xeffff); if(data & 0x20) - machine().root_device().membank("bios_f0_r")->set_base(m_ram->pointer()+0xf0000); + m_bios_f0_r->set_base(m_ram->pointer()+0xf0000); else - machine().root_device().membank("bios_f0_r")->set_base(m_rom+0x30000); + m_bios_f0_r->set_base(m_rom+0x30000/4); if(data & 0x10) { - m_space->install_write_bank(0xf0000,0xfffff,0,"bios_f0_w"); - machine().root_device().membank("bios_f0_w")->set_base(m_ram->pointer()+0xf0000); + m_space->install_write_bank(0xf0000,0xfffff,0,m_bios_f0_w); + m_bios_f0_w->set_base(m_ram->pointer()+0xf0000); } else m_space->nop_write(0xf0000,0xfffff); |