summaryrefslogtreecommitdiffstatshomepage
diff options
context:
space:
mode:
-rw-r--r--src/devices/bus/isa/aha1542c.cpp69
-rw-r--r--src/devices/bus/isa/aha1542c.h19
2 files changed, 73 insertions, 15 deletions
diff --git a/src/devices/bus/isa/aha1542c.cpp b/src/devices/bus/isa/aha1542c.cpp
index 2d366fbec95..2f87b0a8821 100644
--- a/src/devices/bus/isa/aha1542c.cpp
+++ b/src/devices/bus/isa/aha1542c.cpp
@@ -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);
+}
+
+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, uint32_t clock) :
- device_t(mconfig, type, tag, owner, clock),
- device_isa16_card_interface(mconfig, *this)
+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)
{
}
diff --git a/src/devices/bus/isa/aha1542c.h b/src/devices/bus/isa/aha1542c.h
index bc7be3edcf5..2294096bde7 100644
--- a/src/devices/bus/isa/aha1542c.h
+++ b/src/devices/bus/isa/aha1542c.h
@@ -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