// license:BSD-3-Clause // copyright-holders:Carl #include "emu.h" #include "ne2000.h" DEFINE_DEVICE_TYPE(NE2000, ne2000_device, "ne2000", "NE2000 Network Adapter") void ne2000_device::device_add_mconfig(machine_config &config) { DP8390D(config, m_dp8390, 0); m_dp8390->irq_callback().set(FUNC(ne2000_device::ne2000_irq_w)); m_dp8390->mem_read_callback().set(FUNC(ne2000_device::ne2000_mem_read)); m_dp8390->mem_write_callback().set(FUNC(ne2000_device::ne2000_mem_write)); } ne2000_device::ne2000_device(const machine_config& mconfig, const char* tag, device_t* owner, uint32_t clock) : device_t(mconfig, NE2000, tag, owner, clock), device_isa16_card_interface(mconfig, *this), m_dp8390(*this, "dp8390d"), m_irq(0) { } void ne2000_device::device_start() { char mac[7]; uint32_t num = machine().rand(); memset(m_prom, 0x57, 16); sprintf(mac+2, "\x1b%c%c%c", (num >> 16) & 0xff, (num >> 8) & 0xff, num & 0xff); mac[0] = 0; mac[1] = 0; // avoid gcc warning memcpy(m_prom, mac, 6); m_dp8390->set_mac(mac); set_isa_device(); m_isa->install16_device(0x0300, 0x031f, read16s_delegate(*this, FUNC(ne2000_device::ne2000_port_r)), write16s_delegate(*this, FUNC(ne2000_device::ne2000_port_w))); } void ne2000_device::device_reset() { memcpy(m_prom, m_dp8390->get_mac(), 6); m_irq = ioport("CONFIG")->read() & 3; } uint16_t ne2000_device::ne2000_port_r(offs_t offset, uint16_t mem_mask) { offset <<= 1; if(offset < 16) { return m_dp8390->cs_read(offset) | m_dp8390->cs_read(offset+1) << 8; } if(mem_mask == 0xff00) offset++; switch(offset) { case 16: return m_dp8390->remote_read(); case 31: m_dp8390->dp8390_reset(CLEAR_LINE); return 0; default: logerror("ne2000: invalid register read %02X\n", offset); } return 0; } void ne2000_device::ne2000_port_w(offs_t offset, uint16_t data, uint16_t mem_mask) { offset <<= 1; if(offset < 16) { if(mem_mask == 0xff00) { data >>= 8; offset++; } m_dp8390->cs_write(offset, data & 0xff); if(mem_mask == 0xffff) m_dp8390->cs_write(offset+1, data>>8); return; } if(mem_mask == 0xff00) offset++; switch(offset) { case 16: m_dp8390->remote_write(data); return; case 31: m_dp8390->dp8390_reset(ASSERT_LINE); return; default: logerror("ne2000: invalid register write %02X\n", offset); } return; } WRITE_LINE_MEMBER(ne2000_device::ne2000_irq_w) { switch(m_irq) { case 0: m_isa->irq2_w(state); break; case 1: m_isa->irq3_w(state); break; case 2: m_isa->irq4_w(state); break; case 3: m_isa->irq5_w(state); break; } } uint8_t ne2000_device::ne2000_mem_read(offs_t offset) { offset &= ~0x8000; if(offset < 32) return m_prom[offset>>1]; if((offset < (16*1024)) || (offset >= (32*1024))) { logerror("ne2000: invalid memory read %04X\n", offset); return 0xff; } return m_board_ram[offset - (16*1024)]; } void ne2000_device::ne2000_mem_write(offs_t offset, uint8_t data) { offset &= ~0x8000; if((offset < (16*1024)) || (offset >= (32*1024))) { logerror("ne2000: invalid memory write %04X\n", offset); return; } m_board_ram[offset - (16*1024)] = data; } static INPUT_PORTS_START( ne2000 ) PORT_START("CONFIG") PORT_CONFNAME(0x03, 0x01, "NE2000 IRQ jumper (W12-15)") PORT_CONFSETTING( 0x00, "IRQ2/9") PORT_CONFSETTING( 0x01, "IRQ3") PORT_CONFSETTING( 0x02, "IRQ4") PORT_CONFSETTING( 0x03, "IRQ5") //PORT_CONFNAME(0x30, 0x00, "NE2000 IO port jumper (W9-10)") //PORT_CONFSETTING( 0x00, "300") //PORT_CONFSETTING( 0x10, "320") //PORT_CONFSETTING( 0x20, "340") //PORT_CONFSETTING( 0x30, "360") INPUT_PORTS_END ioport_constructor ne2000_device::device_input_ports() const { return INPUT_PORTS_NAME(ne2000); }