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https://github.com/holub/mame
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aha1542c et al.: Add serial EEPROM (nw)
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2ccef2dfd4
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@ -211,13 +211,47 @@ ROM_START( aha1542cp )
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ROM_END
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u8 aha1542c_device::local_status_r()
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{
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return m_eeprom->do_read() << 7;
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}
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void aha1542c_device::local_latch_w(u8 data)
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{
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m_eeprom->cs_write(BIT(data, 2));
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m_eeprom->clk_write(BIT(data, 1));
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m_eeprom->di_write(BIT(data, 0));
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// TODO: several other bits are used
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}
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void aha1542c_device::z84c0010_mem(address_map &map)
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{
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map(0x0000, 0x7fff).rom().region(Z84C0010_TAG, 0);
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map(0x8000, 0x800f).noprw(); // something is mapped there
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map(0x9000, 0xafff).ram(); // 2kb RAM chip
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map(0x8000, 0x9fff).ram(); // 2kb RAM chip
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map(0xa000, 0xa000).r(FUNC(aha1542c_device::local_status_r));
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map(0xb000, 0xb000).w(FUNC(aha1542c_device::local_latch_w));
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map(0xe000, 0xe0ff).ram(); // probably PC<->Z80 communication area
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map(0xb000, 0xb000).noprw(); // something?
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map(0xe003, 0xe003).lr8("e003_r", []() { return 0x20; });
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}
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u8 aha1542cp_device::eeprom_r()
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{
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return m_eeprom->do_read();
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}
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void aha1542cp_device::eeprom_w(u8 data)
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{
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m_eeprom->cs_write(BIT(data, 2));
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m_eeprom->clk_write(BIT(data, 1));
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m_eeprom->di_write(BIT(data, 0));
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}
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void aha1542cp_device::local_mem(address_map &map)
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{
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map(0x0000, 0x7fff).rom().region(Z84C0010_TAG, 0);
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map(0x8000, 0x9fff).ram();
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map(0xc001, 0xc001).rw(FUNC(aha1542cp_device::eeprom_r), FUNC(aha1542cp_device::eeprom_w));
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map(0xe003, 0xe003).nopr();
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}
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const tiny_rom_entry *aha1542c_device::device_rom_region() const
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@ -239,26 +273,37 @@ void aha1542c_device::device_add_mconfig(machine_config &config)
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{
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z80_device &cpu(Z80(config, Z84C0010_TAG, 10'000'000));
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cpu.set_addrmap(AS_PROGRAM, &aha1542c_device::z84c0010_mem);
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EEPROM_93C46_16BIT(config, m_eeprom);
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}
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aha1542c_device::aha1542c_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) :
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device_t(mconfig, type, tag, owner, clock),
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device_isa16_card_interface(mconfig, *this)
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void aha1542cp_device::device_add_mconfig(machine_config &config)
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{
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z80_device &cpu(Z80(config, Z84C0010_TAG, 10'000'000));
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cpu.set_addrmap(AS_PROGRAM, &aha1542cp_device::local_mem);
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EEPROM_93C46_16BIT(config, m_eeprom);
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}
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aha1542c_device::aha1542c_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock)
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: device_t(mconfig, type, tag, owner, clock)
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, device_isa16_card_interface(mconfig, *this)
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, m_eeprom(*this, "eeprom")
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{
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}
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aha1542c_device::aha1542c_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
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aha1542c_device(mconfig, AHA1542C, tag, owner, clock)
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aha1542c_device::aha1542c_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
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: aha1542c_device(mconfig, AHA1542C, tag, owner, clock)
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{
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}
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aha1542cf_device::aha1542cf_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
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aha1542c_device(mconfig, AHA1542CF, tag, owner, clock)
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aha1542cf_device::aha1542cf_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
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: aha1542c_device(mconfig, AHA1542CF, tag, owner, clock)
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{
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}
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aha1542cp_device::aha1542cp_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
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aha1542c_device(mconfig, AHA1542CP, tag, owner, clock)
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aha1542cp_device::aha1542cp_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
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: aha1542c_device(mconfig, AHA1542CP, tag, owner, clock)
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{
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}
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@ -17,6 +17,7 @@
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#include "isa.h"
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#include "machine/eepromser.h"
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//*********************************************************************
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// TYPE DEFINITIONS
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@ -30,7 +31,7 @@ class aha1542c_device : public device_t,
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public:
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static constexpr feature_type unemulated_features() { return feature::DISK; }
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// construction/destruction
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aha1542c_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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aha1542c_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
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DECLARE_READ8_MEMBER( aha1542_r );
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DECLARE_WRITE8_MEMBER( aha1542_w );
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@ -38,6 +39,9 @@ public:
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protected:
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aha1542c_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
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u8 local_status_r();
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void local_latch_w(u8 data);
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// device-level overrides
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virtual void device_start() override;
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virtual void device_reset() override;
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@ -46,6 +50,8 @@ protected:
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virtual const tiny_rom_entry *device_rom_region() const override;
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virtual void device_add_mconfig(machine_config &config) override;
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required_device<eeprom_serial_93cxx_device> m_eeprom;
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private:
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void z84c0010_mem(address_map &map);
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};
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@ -56,7 +62,7 @@ class aha1542cf_device : public aha1542c_device
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{
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public:
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// construction/destruction
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aha1542cf_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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aha1542cf_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
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protected:
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virtual const tiny_rom_entry *device_rom_region() const override;
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@ -68,10 +74,17 @@ class aha1542cp_device : public aha1542c_device
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{
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public:
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// construction/destruction
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aha1542cp_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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aha1542cp_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
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protected:
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virtual void device_add_mconfig(machine_config &config) override;
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virtual const tiny_rom_entry *device_rom_region() const override;
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private:
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u8 eeprom_r();
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void eeprom_w(u8 data);
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void local_mem(address_map &map);
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};
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// device type definitions
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