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Diffstat (limited to 'src/devices/cpu/z80/ky80.cpp')
-rw-r--r-- | src/devices/cpu/z80/ky80.cpp | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/devices/cpu/z80/ky80.cpp b/src/devices/cpu/z80/ky80.cpp new file mode 100644 index 00000000000..b55237efa95 --- /dev/null +++ b/src/devices/cpu/z80/ky80.cpp @@ -0,0 +1,56 @@ +// license:BSD-3-Clause +// copyright-holders:AJR +/*************************************************************************** + + Taxan KY-80 + + This 100-pin QFP device seems to be a custom derivative of the + Kawasaki KC82 CPU core (fast Z80-like with built-in MMU). It seems + possible that it was built entirely out of Kawasaki LSI macrocells, + but the on-chip peripherals are at least mapped differently than in + either KL5C80A12 or KL5C80A16 (in the top 3/8ths of the I/O space + rather the bottom quarter). + + On-chip features appear to include 1024 bytes of RAM, an interrupt + controller (not quite the same as KP69), a KP63-like timer/counter + block, 5 parallel ports and 2 8251-like serial ports. + +***************************************************************************/ + +#include "emu.h" +#include "ky80.h" + +// device type definition +DEFINE_DEVICE_TYPE(KY80, ky80_device, "ky80", "Taxan KY-80") + + +//------------------------------------------------- +// ky80_device - constructor +//------------------------------------------------- + +ky80_device::ky80_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : kc82_device(mconfig, KY80, tag, owner, clock, + address_map_constructor(FUNC(ky80_device::internal_ram), this), + address_map_constructor(FUNC(ky80_device::internal_io), this)) +{ +} + + +//------------------------------------------------- +// internal_ram - map for high-speed internal RAM +//------------------------------------------------- + +void ky80_device::internal_ram(address_map &map) +{ + map(0xffc00, 0xfffff).ram().share("ram"); +} + + +//------------------------------------------------- +// internal_io - map for internal I/O registers +//------------------------------------------------- + +void ky80_device::internal_io(address_map &map) +{ + map(0xa0, 0xa7).mirror(0xff00).rw(FUNC(ky80_device::mmu_r), FUNC(ky80_device::mmu_w)); +} |