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Diffstat (limited to 'src/devices/machine/68340.c')
-rw-r--r--src/devices/machine/68340.c152
1 files changed, 152 insertions, 0 deletions
diff --git a/src/devices/machine/68340.c b/src/devices/machine/68340.c
new file mode 100644
index 00000000000..752a7be4592
--- /dev/null
+++ b/src/devices/machine/68340.c
@@ -0,0 +1,152 @@
+// license:BSD-3-Clause
+// copyright-holders:David Haywood
+/* 68340 */
+
+#include "68340.h"
+
+
+
+
+int m68340_calc_cs(m68340cpu_device *m68k, offs_t address)
+{
+ m68340_sim* sim = m68k->m68340SIM;
+
+ if ( !(sim->m_ba[0] & 1) ) return 1;
+
+ for (int i=0;i<4;i++)
+ {
+ if (sim->m_ba[i] & 1)
+ {
+ int mask = ((sim->m_am[i]&0xffffff00) | 0xff);
+ int base = sim->m_ba[i] & 0xffffff00;
+ int fcmask = (sim->m_am[i] & 0xf0);
+ int fcbase = (sim->m_ba[i] & 0xf0) & ~(sim->m_am[i] & 0xf0);
+ int fc = m68k->mmu_tmp_fc;
+
+ if ((address & ~mask) == base && ((fc << 4) & ~fcmask ) == fcbase ) return i+1;
+ }
+ }
+
+ return 0;
+}
+
+
+
+UINT16 m68340_get_cs(m68340cpu_device *device, offs_t address)
+{
+ device->m68340_currentcs = m68340_calc_cs(device, address);
+
+ return device->m68340_currentcs;
+}
+
+
+
+/* 68340 specifics - MOVE */
+
+READ32_MEMBER( m68340cpu_device::m68340_internal_base_r )
+{
+ m68340cpu_device *m68k = this;
+ int pc = space.device().safe_pc();
+ logerror("%08x m68340_internal_base_r %08x, (%08x)\n", pc, offset*4,mem_mask);
+ return m68k->m68340_base;
+}
+
+WRITE32_MEMBER( m68340cpu_device::m68340_internal_base_w )
+{
+ m68340cpu_device *m68k = this;
+
+ int pc = space.device().safe_pc();
+ logerror("%08x m68340_internal_base_w %08x, %08x (%08x)\n", pc, offset*4,data,mem_mask);
+
+ // other conditions?
+ if (m68k->dfc==0x7)
+ {
+ // unmap old modules
+ if (m68k->m68340_base&1)
+ {
+ int base = m68k->m68340_base & 0xfffff000;
+
+ m68k->internal->unmap_readwrite(base + 0x000, base + 0x05f);
+ m68k->internal->unmap_readwrite(base + 0x600, base + 0x67f);
+ m68k->internal->unmap_readwrite(base + 0x700, base + 0x723);
+ m68k->internal->unmap_readwrite(base + 0x780, base + 0x7bf);
+
+ }
+
+ COMBINE_DATA(&m68k->m68340_base);
+ logerror("%08x m68340_internal_base_w %08x, %08x (%08x) (m68340_base write)\n", pc, offset*4,data,mem_mask);
+
+ // map new modules
+ if (m68k->m68340_base&1)
+ {
+ int base = m68k->m68340_base & 0xfffff000;
+
+ m68k->internal->install_readwrite_handler(base + 0x000, base + 0x03f, read16_delegate(FUNC(m68340cpu_device::m68340_internal_sim_r),this), write16_delegate(FUNC(m68340cpu_device::m68340_internal_sim_w),this),0xffffffff);
+ m68k->internal->install_readwrite_handler(base + 0x010, base + 0x01f, read8_delegate(FUNC(m68340cpu_device::m68340_internal_sim_ports_r),this),write8_delegate(FUNC(m68340cpu_device::m68340_internal_sim_ports_w),this),0xffffffff);
+ m68k->internal->install_readwrite_handler(base + 0x040, base + 0x05f, read32_delegate(FUNC(m68340cpu_device::m68340_internal_sim_cs_r),this), write32_delegate(FUNC(m68340cpu_device::m68340_internal_sim_cs_w),this));
+ m68k->internal->install_readwrite_handler(base + 0x600, base + 0x67f, read32_delegate(FUNC(m68340cpu_device::m68340_internal_timer_r),this), write32_delegate(FUNC(m68340cpu_device::m68340_internal_timer_w),this));
+ m68k->internal->install_readwrite_handler(base + 0x700, base + 0x723, read32_delegate(FUNC(m68340cpu_device::m68340_internal_serial_r),this), write32_delegate(FUNC(m68340cpu_device::m68340_internal_serial_w),this));
+ m68k->internal->install_readwrite_handler(base + 0x780, base + 0x7bf, read32_delegate(FUNC(m68340cpu_device::m68340_internal_dma_r),this), write32_delegate(FUNC(m68340cpu_device::m68340_internal_dma_w),this));
+
+ }
+
+ }
+ else
+ {
+ logerror("%08x m68340_internal_base_w %08x, %04x (%04x) (should fall through?)\n", pc, offset*4,data,mem_mask);
+ }
+
+
+
+}
+
+
+static ADDRESS_MAP_START( m68340_internal_map, AS_PROGRAM, 32, m68340cpu_device )
+ AM_RANGE(0x0003ff00, 0x0003ff03) AM_READWRITE( m68340_internal_base_r, m68340_internal_base_w)
+ADDRESS_MAP_END
+
+
+
+
+
+m68340cpu_device::m68340cpu_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : fscpu32_device(mconfig, "MC68340", tag, owner, clock, M68340, 32,32, ADDRESS_MAP_NAME(m68340_internal_map), "mc68340", __FILE__)
+{
+ m68340SIM = 0;
+ m68340DMA = 0;
+ m68340SERIAL = 0;
+ m68340TIMER = 0;
+ m68340_base = 0;
+}
+
+
+
+
+
+
+void m68340cpu_device::device_reset()
+{
+ fscpu32_device::device_reset();
+}
+
+
+void m68340cpu_device::device_start()
+{
+ fscpu32_device::device_start();
+
+ m68340SIM = new m68340_sim();
+ m68340DMA = new m68340_dma();
+ m68340SERIAL = new m68340_serial();
+ m68340TIMER = new m68340_timer();
+
+ m68340SIM->reset();
+ m68340DMA->reset();
+ m68340SERIAL->reset();
+ m68340TIMER->reset();
+
+ start_68340_sim();
+
+ m68340_base = 0x00000000;
+
+ internal = &this->space(AS_PROGRAM);
+}