diff options
Diffstat (limited to 'src/devices/cpu/m6502/m6502mtu.cpp')
-rw-r--r-- | src/devices/cpu/m6502/m6502mtu.cpp | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/src/devices/cpu/m6502/m6502mtu.cpp b/src/devices/cpu/m6502/m6502mtu.cpp deleted file mode 100644 index 917ca93158e..00000000000 --- a/src/devices/cpu/m6502/m6502mtu.cpp +++ /dev/null @@ -1,76 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Olivier Galibert -/*************************************************************************** - - m6502mtu.cpp - - M6502 with MTU external banking hardware - -***************************************************************************/ - -#include "emu.h" -#include "m6502mtu.h" - -DEFINE_DEVICE_TYPE(M6502MTU, m6502mtu_device, "m6502mtu", "M6502 with MTU banking") - -m6502mtu_device::m6502mtu_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : - m6502_device(mconfig, M6502MTU, tag, owner, clock) -{ - program_config.m_addr_width = 18; - sprogram_config.m_addr_width = 18; -} - -void m6502mtu_device::device_start() -{ - mintf = nullptr; - space(AS_PROGRAM).specific(cprogram); - space(has_space(AS_OPCODES) ? AS_OPCODES : AS_PROGRAM).specific(csprogram); - - save_item(NAME(low_instruction)); - save_item(NAME(interrupt_mode)); - save_item(NAME(pbank)); - save_item(NAME(dbank)); - - init(); -} - -void m6502mtu_device::device_reset() -{ - m6502_device::device_reset(); - pbank = 0; - dbank = 0; - low_instruction = false; - interrupt_mode = false; -} - - -void m6502mtu_device::prefetchd() -{ - sync = true; - sync_w(ASSERT_LINE); - NPC = PC; - low_instruction = PC < 0x200; - IR = csprogram.read_byte(low_instruction || interrupt_mode ? PC : PC | pbank); - sync = false; - sync_w(CLEAR_LINE); - - if((nmi_pending || ((irq_state || apu_irq_state) && !(P & F_I))) && !inhibit_interrupts) { - irq_taken = true; - IR = 0x00; - } else - PC++; -} - -void m6502mtu_device::prefetchd_noirq() -{ - sync = true; - sync_w(ASSERT_LINE); - NPC = PC; - low_instruction = PC < 0x200; - IR = csprogram.read_byte(low_instruction || interrupt_mode ? PC : PC | pbank); - sync = false; - sync_w(CLEAR_LINE); - PC++; -} - -#include "cpu/m6502/m6502mtu.hxx" |