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Diffstat (limited to 'src/devices/bus/msx_cart/nomapper.cpp')
-rw-r--r--src/devices/bus/msx_cart/nomapper.cpp94
1 files changed, 0 insertions, 94 deletions
diff --git a/src/devices/bus/msx_cart/nomapper.cpp b/src/devices/bus/msx_cart/nomapper.cpp
deleted file mode 100644
index 24ebbb38e0d..00000000000
--- a/src/devices/bus/msx_cart/nomapper.cpp
+++ /dev/null
@@ -1,94 +0,0 @@
-// license:BSD-3-Clause
-// copyright-holders:Wilbert Pol
-
-#include "emu.h"
-#include "nomapper.h"
-
-DEFINE_DEVICE_TYPE(MSX_CART_NOMAPPER, msx_cart_nomapper_device, "msx_cart_nomapper", "MSX Cartridge - ROM")
-
-
-msx_cart_nomapper_device::msx_cart_nomapper_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
- : device_t(mconfig, MSX_CART_NOMAPPER, tag, owner, clock)
- , msx_cart_interface(mconfig, *this)
- , m_start_address(0)
- , m_end_address(0)
-{
-}
-
-void msx_cart_nomapper_device::device_start()
-{
-}
-
-void msx_cart_nomapper_device::initialize_cartridge()
-{
- uint32_t size = get_rom_size();
- uint8_t *rom = get_rom_base();
-
- // determine start address
- // default to $4000
- m_start_address = 0x4000;
-
- switch (size)
- {
- /* 8KB/16KB */
- case 0x2000: case 0x4000:
- {
- uint16_t start = rom[3] << 8 | rom[2];
-
- // start address of $0000: call address in the $4000 region: $4000, else $8000
- if (start == 0)
- {
- if ((rom[5] & 0xc0) == 0x40)
- m_start_address = 0x4000;
- else
- m_start_address = 0x8000;
- }
-
- // start address in the $8000 region: $8000, else default
- else if ((start & 0xc000) == 0x8000)
- m_start_address = 0x8000;
-
- break;
- }
-
- /* 32KB */
- case 0x8000:
- // take default, check when no "AB" at $0000, but "AB" at $4000
- if (rom[0] != 'A' && rom[1] != 'B' && rom[0x4000] == 'A' && rom[0x4001] == 'B')
- {
- uint16_t start = rom[0x4003] << 8 | rom[0x4002];
-
- // start address of $0000 and call address in the $4000 region, or start address outside the $8000 region: $0000, else default
- if ((start == 0 && (rom[0x4005] & 0xc0) == 0x40) || start < 0x8000 || start >= 0xc000)
- m_start_address = 0;
- }
-
- break;
-
- /* 48KB */
- case 0xc000:
- // "AB" at $0000, but no "AB" at $4000, not "AB": $0000
- if (rom[0] == 'A' && rom[1] == 'B' && rom[0x4000] != 'A' && rom[0x4001] != 'B')
- m_start_address = 0x4000;
- else
- m_start_address = 0;
-
- break;
-
- /* 64KB */
- default:
- m_start_address = 0;
- break;
- }
-
- m_end_address = std::min<uint32_t>(m_start_address + size, 0x10000);
-}
-
-uint8_t msx_cart_nomapper_device::read_cart(offs_t offset)
-{
- if ( offset >= m_start_address && offset < m_end_address )
- {
- return get_rom_base()[offset - m_start_address];
- }
- return 0xff;
-}