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Diffstat (limited to 'src/devices/bus/isa/ne2000.c')
-rw-r--r--src/devices/bus/isa/ne2000.c144
1 files changed, 144 insertions, 0 deletions
diff --git a/src/devices/bus/isa/ne2000.c b/src/devices/bus/isa/ne2000.c
new file mode 100644
index 00000000000..b635f8e736c
--- /dev/null
+++ b/src/devices/bus/isa/ne2000.c
@@ -0,0 +1,144 @@
+// license:BSD-3-Clause
+// copyright-holders:Carl
+#include "emu.h"
+#include "ne2000.h"
+
+
+static MACHINE_CONFIG_FRAGMENT(ne2000_config)
+ MCFG_DEVICE_ADD("dp8390d", DP8390D, 0)
+ MCFG_DP8390D_IRQ_CB(WRITELINE(ne2000_device, ne2000_irq_w))
+ MCFG_DP8390D_MEM_READ_CB(READ8(ne2000_device, ne2000_mem_read))
+ MCFG_DP8390D_MEM_WRITE_CB(WRITE8(ne2000_device, ne2000_mem_write))
+MACHINE_CONFIG_END
+
+const device_type NE2000 = &device_creator<ne2000_device>;
+
+machine_config_constructor ne2000_device::device_mconfig_additions() const {
+ return MACHINE_CONFIG_NAME(ne2000_config);
+}
+
+ne2000_device::ne2000_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, NE2000, "NE2000 Network Adapter", tag, owner, clock, "ne2000", __FILE__),
+ device_isa16_card_interface(mconfig, *this),
+ m_dp8390(*this, "dp8390d") {
+}
+
+void ne2000_device::device_start() {
+ char mac[7];
+ UINT32 num = 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, 0, 0, read16_delegate(FUNC(ne2000_device::ne2000_port_r), this), write16_delegate(FUNC(ne2000_device::ne2000_port_w), this));
+}
+
+void ne2000_device::device_reset() {
+ memcpy(m_prom, m_dp8390->get_mac(), 6);
+ m_irq = ioport("CONFIG")->read() & 3;
+}
+
+READ16_MEMBER(ne2000_device::ne2000_port_r) {
+ offset <<= 1;
+ if(offset < 16) {
+ m_dp8390->dp8390_cs(CLEAR_LINE);
+ return m_dp8390->dp8390_r(space, offset, 0xff) |
+ m_dp8390->dp8390_r(space, offset+1, 0xff) << 8;
+ }
+ if(mem_mask == 0xff00) offset++;
+ switch(offset) {
+ case 16:
+ m_dp8390->dp8390_cs(ASSERT_LINE);
+ return m_dp8390->dp8390_r(space, offset, mem_mask);
+ case 31:
+ m_dp8390->dp8390_reset(CLEAR_LINE);
+ return 0;
+ default:
+ logerror("ne2000: invalid register read %02X\n", offset);
+ }
+ return 0;
+}
+
+WRITE16_MEMBER(ne2000_device::ne2000_port_w) {
+ offset <<= 1;
+ if(offset < 16) {
+ m_dp8390->dp8390_cs(CLEAR_LINE);
+ if(mem_mask == 0xff00) {
+ data >>= 8;
+ offset++;
+ }
+ m_dp8390->dp8390_w(space, offset, data & 0xff, 0xff);
+ if(mem_mask == 0xffff) m_dp8390->dp8390_w(space, offset+1, data>>8, 0xff);
+ return;
+ }
+ if(mem_mask == 0xff00) offset++;
+ switch(offset) {
+ case 16:
+ m_dp8390->dp8390_cs(ASSERT_LINE);
+ m_dp8390->dp8390_w(space, offset, data, mem_mask);
+ 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;
+ }
+}
+
+READ8_MEMBER(ne2000_device::ne2000_mem_read) {
+ 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)];
+}
+
+WRITE8_MEMBER(ne2000_device::ne2000_mem_write) {
+ 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);
+}