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https://github.com/holub/mame
synced 2025-04-23 00:39:36 +03:00
m6510: Add 6508 variant (nw)
This commit is contained in:
AJR
parent
0040650300
commit
5f187d283d
@ -6,6 +6,9 @@
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6502 with 6 i/o pins, also known as 8500
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6508 is 6510 plus 256 bytes of internal RAM, mirrored across pages 0
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and 1.
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***************************************************************************/
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#include "emu.h"
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@ -13,6 +16,7 @@
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#include "m6510d.h"
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DEFINE_DEVICE_TYPE(M6510, m6510_device, "m6510", "MOS Technology M6510")
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DEFINE_DEVICE_TYPE(M6508, m6508_device, "m6508", "MOS Technology M6508")
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m6510_device::m6510_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
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m6510_device(mconfig, M6510, tag, owner, clock)
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@ -39,18 +43,11 @@ std::unique_ptr<util::disasm_interface> m6510_device::create_disassembler()
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return std::make_unique<m6510_disassembler>();
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}
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void m6510_device::device_start()
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void m6510_device::init_port()
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{
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read_port.resolve_safe(0);
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write_port.resolve_safe();
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if(cache_disabled)
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mintf = std::make_unique<mi_6510_nd>(this);
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else
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mintf = std::make_unique<mi_6510_normal>(this);
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init();
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save_item(NAME(pullup));
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save_item(NAME(floating));
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save_item(NAME(dir));
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@ -58,6 +55,17 @@ void m6510_device::device_start()
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save_item(NAME(drive));
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}
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void m6510_device::device_start()
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{
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if(cache_disabled)
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mintf = std::make_unique<mi_6510_nd>(this);
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else
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mintf = std::make_unique<mi_6510_normal>(this);
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init();
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init_port();
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}
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void m6510_device::device_reset()
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{
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m6502_device::device_reset();
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@ -169,4 +177,106 @@ uint8_t m6510_device::mi_6510_nd::read_arg(uint16_t adr)
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return res;
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}
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m6508_device::m6508_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
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m6510_device(mconfig, M6508, tag, owner, clock)
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{
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}
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void m6508_device::device_start()
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{
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if(cache_disabled)
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mintf = std::make_unique<mi_6508_nd>(this);
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else
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mintf = std::make_unique<mi_6508_normal>(this);
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init();
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init_port();
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ram_page = make_unique_clear<uint8_t[]>(256);
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save_pointer(NAME(ram_page), 256);
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}
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m6508_device::mi_6508_normal::mi_6508_normal(m6508_device *_base)
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{
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base = _base;
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}
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uint8_t m6508_device::mi_6508_normal::read(uint16_t adr)
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{
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uint8_t res = program->read_byte(adr);
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if(adr == 0x0000)
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res = base->dir_r();
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else if(adr == 0x0001)
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res = base->port_r();
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else if(adr < 0x0200)
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res = base->ram_page[adr & 0x00ff];
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return res;
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}
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uint8_t m6508_device::mi_6508_normal::read_sync(uint16_t adr)
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{
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uint8_t res = scache->read_byte(adr);
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if(adr == 0x0000)
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res = base->dir_r();
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else if(adr == 0x0001)
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res = base->port_r();
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else if(adr < 0x0200)
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res = base->ram_page[adr & 0x00ff];
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return res;
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}
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uint8_t m6508_device::mi_6508_normal::read_arg(uint16_t adr)
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{
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uint8_t res = cache->read_byte(adr);
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if(adr == 0x0000)
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res = base->dir_r();
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else if(adr == 0x0001)
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res = base->port_r();
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else if(adr < 0x0200)
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res = base->ram_page[adr & 0x00ff];
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return res;
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}
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void m6508_device::mi_6508_normal::write(uint16_t adr, uint8_t val)
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{
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program->write_byte(adr, val);
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if(adr == 0x0000)
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base->dir_w(val);
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else if(adr == 0x0001)
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base->port_w(val);
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else if(adr < 0x0200)
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base->ram_page[adr & 0x00ff] = val;
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}
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m6508_device::mi_6508_nd::mi_6508_nd(m6508_device *_base) : mi_6508_normal(_base)
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{
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}
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uint8_t m6508_device::mi_6508_nd::read_sync(uint16_t adr)
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{
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uint8_t res = sprogram->read_byte(adr);
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if(adr == 0x0000)
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res = base->dir_r();
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else if(adr == 0x0001)
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res = base->port_r();
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else if(adr < 0x0200)
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res = base->ram_page[adr & 0x00ff];
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return res;
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}
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uint8_t m6508_device::mi_6508_nd::read_arg(uint16_t adr)
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{
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uint8_t res = program->read_byte(adr);
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if(adr == 0x0000)
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res = base->dir_r();
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else if(adr == 0x0001)
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res = base->port_r();
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else if(adr < 0x0200)
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res = base->ram_page[adr & 0x00ff];
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return res;
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}
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#include "cpu/m6502/m6510.hxx"
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@ -64,6 +64,7 @@ protected:
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uint8_t port_r();
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void port_w(uint8_t data);
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void init_port();
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void update_port();
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#define O(o) void o ## _full(); void o ## _partial()
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@ -80,11 +81,42 @@ protected:
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#undef O
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};
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class m6508_device : public m6510_device {
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public:
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m6508_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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protected:
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virtual void device_start() override;
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class mi_6508_normal : public memory_interface {
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public:
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m6508_device *base;
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mi_6508_normal(m6508_device *base);
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virtual ~mi_6508_normal() {}
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virtual uint8_t read(uint16_t adr) override;
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virtual uint8_t read_sync(uint16_t adr) override;
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virtual uint8_t read_arg(uint16_t adr) override;
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virtual void write(uint16_t adr, uint8_t val) override;
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};
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class mi_6508_nd : public mi_6508_normal {
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public:
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mi_6508_nd(m6508_device *base);
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virtual ~mi_6508_nd() {}
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virtual uint8_t read_sync(uint16_t adr) override;
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virtual uint8_t read_arg(uint16_t adr) override;
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};
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std::unique_ptr<uint8_t[]> ram_page;
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};
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enum {
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M6510_IRQ_LINE = m6502_device::IRQ_LINE,
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M6510_NMI_LINE = m6502_device::NMI_LINE
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};
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DECLARE_DEVICE_TYPE(M6510, m6510_device)
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DECLARE_DEVICE_TYPE(M6508, m6508_device)
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#endif // MAME_CPU_M6502_M6510_H
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@ -32,6 +32,7 @@ To Do:
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#include "emu.h"
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#include "cpu/z8000/z8000.h"
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#include "cpu/m6502/m6510.h"
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#include "machine/z80scc.h"
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#include "bus/rs232/rs232.h"
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#include "machine/z8536.h"
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@ -46,6 +47,7 @@ public:
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c900_state(const machine_config &mconfig, device_type type, const char *tag)
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: driver_device(mconfig, type, tag)
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, m_maincpu(*this, "maincpu")
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, m_fdcpu(*this, "fdcpu")
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, m_spkrdev(*this, "speaker")
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{ }
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@ -58,7 +60,10 @@ private:
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void io_map(address_map &map);
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void special_io_map(address_map &map);
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void mem_map(address_map &map);
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void fdc_map(address_map &map);
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required_device<cpu_device> m_maincpu;
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required_device<cpu_device> m_fdcpu;
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required_device<speaker_sound_device> m_spkrdev;
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};
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@ -90,6 +95,12 @@ void c900_state::special_io_map(address_map &map)
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// TODO: Z8010 MMU
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}
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void c900_state::fdc_map(address_map &map)
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{
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map(0x0000, 0x01ff).noprw(); // internal
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map(0xe000, 0xffff).rom().region("fdc", 0);
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}
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static INPUT_PORTS_START( c900 )
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INPUT_PORTS_END
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@ -120,6 +131,9 @@ void c900_state::c900(machine_config &config)
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m_maincpu->set_addrmap(AS_IO, &c900_state::io_map);
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m_maincpu->set_addrmap(z8001_device::AS_SIO, &c900_state::special_io_map);
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M6508(config, m_fdcpu, 12_MHz_XTAL / 8); // PH1/PH2 = 1.5 MHz
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m_fdcpu->set_addrmap(AS_PROGRAM, &c900_state::fdc_map);
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GFXDECODE(config, "gfxdecode", "palette", gfx_c900);
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PALETTE(config, "palette", palette_device::MONOCHROME);
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