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aha1542c et al.: Add serial EEPROM (nw)

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This commit is contained in:
AJR 2019-03-22 11:14:41 -04:00
parent 2ccef2dfd4
commit 0b27ba31c4
2 changed files with 73 additions and 15 deletions
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69
src/devices/bus/isa/aha1542c.cpp
View File

@ -211,13 +211,47 @@ ROM_START( aha1542cp )
ROM_END
u8 aha1542c_device::local_status_r()
{
return m_eeprom->do_read() << 7;
}
void aha1542c_device::local_latch_w(u8 data)
{
m_eeprom->cs_write(BIT(data, 2));
m_eeprom->clk_write(BIT(data, 1));
m_eeprom->di_write(BIT(data, 0));
// TODO: several other bits are used
}
void aha1542c_device::z84c0010_mem(address_map &map)
{
map(0x0000, 0x7fff).rom().region(Z84C0010_TAG, 0);
map(0x8000, 0x800f).noprw(); // something is mapped there
map(0x9000, 0xafff).ram(); // 2kb RAM chip
map(0x8000, 0x9fff).ram(); // 2kb RAM chip
map(0xa000, 0xa000).r(FUNC(aha1542c_device::local_status_r));
map(0xb000, 0xb000).w(FUNC(aha1542c_device::local_latch_w));
map(0xe000, 0xe0ff).ram(); // probably PC<->Z80 communication area
map(0xb000, 0xb000).noprw(); // something?
map(0xe003, 0xe003).lr8("e003_r", []() { return 0x20; });
}
u8 aha1542cp_device::eeprom_r()
{
return m_eeprom->do_read();
}
void aha1542cp_device::eeprom_w(u8 data)
{
m_eeprom->cs_write(BIT(data, 2));
m_eeprom->clk_write(BIT(data, 1));
m_eeprom->di_write(BIT(data, 0));
}
void aha1542cp_device::local_mem(address_map &map)
{
map(0x0000, 0x7fff).rom().region(Z84C0010_TAG, 0);
map(0x8000, 0x9fff).ram();
map(0xc001, 0xc001).rw(FUNC(aha1542cp_device::eeprom_r), FUNC(aha1542cp_device::eeprom_w));
map(0xe003, 0xe003).nopr();
}
const tiny_rom_entry *aha1542c_device::device_rom_region() const
@ -239,26 +273,37 @@ void aha1542c_device::device_add_mconfig(machine_config &config)
{
z80_device &cpu(Z80(config, Z84C0010_TAG, 10'000'000));
cpu.set_addrmap(AS_PROGRAM, &aha1542c_device::z84c0010_mem);
EEPROM_93C46_16BIT(config, m_eeprom);
}
aha1542c_device::aha1542c_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, type, tag, owner, clock),
device_isa16_card_interface(mconfig, *this)
void aha1542cp_device::device_add_mconfig(machine_config &config)
{
z80_device &cpu(Z80(config, Z84C0010_TAG, 10'000'000));
cpu.set_addrmap(AS_PROGRAM, &aha1542cp_device::local_mem);
EEPROM_93C46_16BIT(config, m_eeprom);
}
aha1542c_device::aha1542c_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock)
: device_t(mconfig, type, tag, owner, clock)
, device_isa16_card_interface(mconfig, *this)
, m_eeprom(*this, "eeprom")
{
}
aha1542c_device::aha1542c_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
aha1542c_device(mconfig, AHA1542C, tag, owner, clock)
aha1542c_device::aha1542c_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: aha1542c_device(mconfig, AHA1542C, tag, owner, clock)
{
}
aha1542cf_device::aha1542cf_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
aha1542c_device(mconfig, AHA1542CF, tag, owner, clock)
aha1542cf_device::aha1542cf_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: aha1542c_device(mconfig, AHA1542CF, tag, owner, clock)
{
}
aha1542cp_device::aha1542cp_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
aha1542c_device(mconfig, AHA1542CP, tag, owner, clock)
aha1542cp_device::aha1542cp_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: aha1542c_device(mconfig, AHA1542CP, tag, owner, clock)
{
}

19
src/devices/bus/isa/aha1542c.h
View File

@ -17,6 +17,7 @@
#include "isa.h"
#include "machine/eepromser.h"
//*********************************************************************
// TYPE DEFINITIONS
@ -30,7 +31,7 @@ class aha1542c_device : public device_t,
public:
static constexpr feature_type unemulated_features() { return feature::DISK; }
// construction/destruction
aha1542c_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
aha1542c_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
DECLARE_READ8_MEMBER( aha1542_r );
DECLARE_WRITE8_MEMBER( aha1542_w );
@ -38,6 +39,9 @@ public:
protected:
aha1542c_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
u8 local_status_r();
void local_latch_w(u8 data);
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
@ -46,6 +50,8 @@ protected:
virtual const tiny_rom_entry *device_rom_region() const override;
virtual void device_add_mconfig(machine_config &config) override;
required_device<eeprom_serial_93cxx_device> m_eeprom;
private:
void z84c0010_mem(address_map &map);
};
@ -56,7 +62,7 @@ class aha1542cf_device : public aha1542c_device
{
public:
// construction/destruction
aha1542cf_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
aha1542cf_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
protected:
virtual const tiny_rom_entry *device_rom_region() const override;
@ -68,10 +74,17 @@ class aha1542cp_device : public aha1542c_device
{
public:
// construction/destruction
aha1542cp_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
aha1542cp_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
protected:
virtual void device_add_mconfig(machine_config &config) override;
virtual const tiny_rom_entry *device_rom_region() const override;
private:
u8 eeprom_r();
void eeprom_w(u8 data);
void local_mem(address_map &map);
};
// device type definitions