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// license: GPL-2.0+
// copyright-holders: Dirk Best
/***************************************************************************
Commodore A2065
Zorro-II Ethernet Network Interface
***************************************************************************/
#include "emu.h"
#include "a2065.h"
#define VERBOSE 1
#include "logmacro.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(AMIGA_A2065, bus::amiga::zorro::a2065_device, "amiga_a2065", "Commodore A2065 Ethernet Card")
namespace bus::amiga::zorro {
a2065_device::a2065_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, AMIGA_A2065, tag, owner, clock),
device_zorro2_card_interface(mconfig, *this),
m_lance(*this, "lance")
{
}
//**************************************************************************
// MACHINE DEFINITIONS
//**************************************************************************
void a2065_device::device_add_mconfig(machine_config &config)
{
AM7990(config, m_lance);
m_lance->intr_out().set(FUNC(a2065_device::lance_irq_w));
m_lance->dma_in().set(FUNC(a2065_device::lance_ram_r));
m_lance->dma_out().set(FUNC(a2065_device::lance_ram_w));
}
//**************************************************************************
// MACHINE EMULATION
//**************************************************************************
void a2065_device::device_start()
{
// setup ram
m_ram = std::make_unique<uint16_t[]>(0x4000);
memset(m_ram.get(), 0xff, 0x4000 * sizeof(uint16_t));
// register for save states
save_pointer(NAME(m_ram), 0x4000);
}
uint16_t a2065_device::host_ram_r(offs_t offset)
{
// logerror("host read offset %04x\n", offset);
return m_ram[offset & 0x3fff];
}
void a2065_device::host_ram_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
// logerror("host write %04x = %04x\n", offset, data);
COMBINE_DATA(&m_ram[offset]);
}
uint16_t a2065_device::lance_ram_r(offs_t offset)
{
offset = (offset >> 1) & 0x3fff;
// logerror("lance read offset %04x\n", offset);
return m_ram[offset];
}
void a2065_device::lance_ram_w(offs_t offset, uint16_t data, uint16_t mem_mask)
{
offset = (offset >> 1) & 0x3fff;
// logerror("lance write %04x = %04x\n", offset, data);
COMBINE_DATA(&m_ram[offset]);
}
void a2065_device::lance_irq_w(int state)
{
// default is irq 2, can be changed via jumper
m_zorro->int2_w(!state);
}
//**************************************************************************
// AUTOCONFIG
//**************************************************************************
void a2065_device::autoconfig_base_address(offs_t address)
{
LOG("%s: autoconfig_base_address received: 0x%06x\n", shortname(), address);
LOG("-> installing a2065\n");
// stop responding to default autoconfig
m_zorro->space().unmap_readwrite(0xe80000, 0xe8007f);
// install autoconfig handler to new location
m_zorro->space().install_readwrite_handler(address, address + 0x7f,
read16_delegate(*this, FUNC(amiga_autoconfig::autoconfig_read)),
write16_delegate(*this, FUNC(amiga_autoconfig::autoconfig_write)), 0xffff);
// install access to lance registers
m_zorro->space().install_read_handler(address + 0x4000, address + 0x4003,
read16m_delegate(*m_lance, FUNC(am7990_device::regs_r)), 0xffff);
m_zorro->space().install_write_handler(address + 0x4000, address + 0x4003,
write16sm_delegate(*m_lance, FUNC(am7990_device::regs_w)), 0xffff);
// install access to onboard ram (32k)
m_zorro->space().install_read_handler(address + 0x8000, address + 0x8000 + 0x7fff,
read16sm_delegate(*this, FUNC(a2065_device::host_ram_r)), 0xffff);
m_zorro->space().install_write_handler(address + 0x8000, address + 0x8000 + 0x7fff,
write16s_delegate(*this, FUNC(a2065_device::host_ram_w)), 0xffff);
// we're done
m_zorro->cfgout_w(0);
}
void a2065_device::cfgin_w(int state)
{
LOG("%s: cfgin_w (%d)\n", shortname(), state);
if (state == 0)
{
// setup autoconfig
autoconfig_board_type(BOARD_TYPE_ZORRO2);
autoconfig_board_size(BOARD_SIZE_64K);
autoconfig_product(112);
autoconfig_manufacturer(514);
autoconfig_serial(0x00123456); // last 3 bytes = last 3 bytes of mac address
autoconfig_link_into_memory(false);
autoconfig_rom_vector_valid(false);
autoconfig_multi_device(false);
autoconfig_8meg_preferred(false);
autoconfig_can_shutup(true); // ?
// install autoconfig handler
m_zorro->space().install_readwrite_handler(0xe80000, 0xe8007f,
read16_delegate(*this, FUNC(amiga_autoconfig::autoconfig_read)),
write16_delegate(*this, FUNC(amiga_autoconfig::autoconfig_write)), 0xffff);
}
}
} // namespace bus::amiga::zorro
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