mirror of
https://github.com/holub/mame
synced 2025-05-18 19:49:35 +03:00
4a39209b73
(mess) ne1000,ne2000: ram on the 2000 is incompletely decoded, probably on 1000 also, needs verification (nw)
136 lines
3.6 KiB
C
136 lines
3.6 KiB
C
#include "emu.h"
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#include "machine/ne1000.h"
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static const dp8390_interface ne1000_dp8390_interface = {
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DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, ne1000_device, ne1000_irq_w),
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DEVCB_NULL,
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DEVCB_DEVICE_MEMBER(DEVICE_SELF_OWNER, ne1000_device, ne1000_mem_read),
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DEVCB_DEVICE_MEMBER(DEVICE_SELF_OWNER, ne1000_device, ne1000_mem_write)
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};
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static MACHINE_CONFIG_FRAGMENT(ne1000_config)
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MCFG_DP8390D_ADD("dp8390d", ne1000_dp8390_interface)
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MACHINE_CONFIG_END
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const device_type NE1000 = &device_creator<ne1000_device>;
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machine_config_constructor ne1000_device::device_mconfig_additions() const {
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return MACHINE_CONFIG_NAME(ne1000_config);
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}
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ne1000_device::ne1000_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
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: device_t(mconfig, NE1000, "NE1000 Network Adapter", tag, owner, clock, "ne1000", __FILE__),
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device_isa8_card_interface(mconfig, *this),
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m_dp8390(*this, "dp8390d") {
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}
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void ne1000_device::device_start() {
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char mac[7];
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UINT32 num = rand();
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memset(m_prom, 0x57, 16);
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sprintf(mac+2, "\x1b%c%c%c", (num >> 16) & 0xff, (num >> 8) & 0xff, num & 0xff);
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mac[0] = 0; mac[1] = 0; // avoid gcc warning
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memcpy(m_prom, mac, 6);
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m_dp8390->set_mac(mac);
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set_isa_device();
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m_isa->install_device(0x0300, 0x031f, 0, 0, read8_delegate(FUNC(ne1000_device::ne1000_port_r), this), write8_delegate(FUNC(ne1000_device::ne1000_port_w), this));
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}
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void ne1000_device::device_reset() {
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memcpy(m_prom, m_dp8390->get_mac(), 6);
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m_irq = ioport("CONFIG")->read() & 3;
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}
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READ8_MEMBER(ne1000_device::ne1000_port_r) {
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if(offset < 16) {
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m_dp8390->dp8390_cs(CLEAR_LINE);
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return m_dp8390->dp8390_r(space, offset, mem_mask);
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}
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switch(offset) {
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case 16:
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m_dp8390->dp8390_cs(ASSERT_LINE);
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return m_dp8390->dp8390_r(space, offset, mem_mask);
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case 31:
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m_dp8390->dp8390_reset(CLEAR_LINE);
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return 0;
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default:
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logerror("ne1000: invalid register read %02X\n", offset);
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}
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return 0;
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}
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WRITE8_MEMBER(ne1000_device::ne1000_port_w) {
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if(offset < 16) {
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m_dp8390->dp8390_cs(CLEAR_LINE);
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m_dp8390->dp8390_w(space, offset, data, mem_mask);
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return;
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}
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switch(offset) {
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case 16:
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m_dp8390->dp8390_cs(ASSERT_LINE);
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m_dp8390->dp8390_w(space, offset, data, mem_mask);
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return;
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case 31:
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m_dp8390->dp8390_reset(ASSERT_LINE);
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return;
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default:
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logerror("ne1000: invalid register write %02X\n", offset);
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}
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return;
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}
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WRITE_LINE_MEMBER(ne1000_device::ne1000_irq_w) {
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switch(m_irq) {
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case 0:
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m_isa->irq2_w(state);
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break;
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case 1:
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m_isa->irq3_w(state);
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break;
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case 2:
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m_isa->irq4_w(state);
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break;
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case 3:
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m_isa->irq5_w(state);
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break;
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}
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}
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READ8_MEMBER(ne1000_device::ne1000_mem_read) {
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offset &= ~0xc000; // verify
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if(offset < 16) return m_prom[offset];
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if((offset < (8*1024)) || (offset >= (16*1024))) {
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logerror("ne1000: invalid memory read %04X\n", offset);
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return 0xff;
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}
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return m_board_ram[offset - (8*1024)];
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}
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WRITE8_MEMBER(ne1000_device::ne1000_mem_write) {
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offset &= ~0xc000; // verify
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if((offset < (8*1024)) || (offset >= (16*1024))) {
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logerror("ne1000: invalid memory write %04X\n", offset);
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return;
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}
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m_board_ram[offset - (8*1024)] = data;
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}
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static INPUT_PORTS_START( ne1000 )
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PORT_START("CONFIG")
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PORT_CONFNAME(0x03, 0x01, "NE1000 IRQ jumper (W12-15)")
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PORT_CONFSETTING( 0x00, "IRQ2/9")
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PORT_CONFSETTING( 0x01, "IRQ3")
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PORT_CONFSETTING( 0x02, "IRQ4")
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PORT_CONFSETTING( 0x03, "IRQ5")
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//PORT_CONFNAME(0x30, 0x00, "NE1000 IO port jumper (W9-10)")
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//PORT_CONFSETTING( 0x00, "300")
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//PORT_CONFSETTING( 0x10, "320")
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//PORT_CONFSETTING( 0x20, "340")
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//PORT_CONFSETTING( 0x30, "360")
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INPUT_PORTS_END
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ioport_constructor ne1000_device::device_input_ports() const
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{
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return INPUT_PORTS_NAME(ne1000);
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}
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