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i82586: Add line handler for reset (nw)

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This commit is contained in:
AJR 2019-04-29 22:00:52 -04:00
parent cac8808471
commit fa8d5aa902
5 changed files with 24 additions and 13 deletions
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6
src/devices/bus/isa/3c505.cpp
View File

@ -402,11 +402,7 @@ void isa16_3c505_device::acr_w(u8 data)
if ((data ^ m_acr) & ACR_LED2)
m_led[1] = !!(data & ACR_LED2);
if (!(m_acr & ACR_R586) && (data & ACR_R586))
{
LOGMASKED(LOG_REG, "i82586 reset\n");
m_net->reset();
}
m_net->reset_w((data & ACR_R586) ? 1 : 0);
if ((data ^ m_acr) & ACR_FLSH)
{

8
src/devices/bus/isa/np600.cpp
View File

@ -32,12 +32,6 @@ void np600a3_device::lcc_ca_w(u16 data)
m_lcc->ca(1);
}
WRITE_LINE_MEMBER(np600a3_device::lcc_reset_w)
{
if (!state)
m_lcc->reset();
}
u16 np600a3_device::status_r()
{
return 0;
@ -69,7 +63,7 @@ void np600a3_device::device_add_mconfig(machine_config &config)
m_npcpu->set_addrmap(AS_IO, &np600a3_device::io_map);
ls259_device &bitlatch(LS259(config, "bitlatch")); // U28
bitlatch.q_out_cb<4>().set(FUNC(np600a3_device::lcc_reset_w));
bitlatch.q_out_cb<4>().set(m_lcc, FUNC(i82586_device::reset_w)).invert();
I82586(config, m_lcc, 20_MHz_XTAL);
m_lcc->set_addrmap(0, &np600a3_device::lcc_map);

1
src/devices/bus/isa/np600.h
View File

@ -28,7 +28,6 @@ protected:
private:
void lcc_ca_w(u16 data);
DECLARE_WRITE_LINE_MEMBER(lcc_reset_w);
u16 status_r();
void mem_map(address_map &map);

20
src/devices/machine/i82586.cpp
View File

@ -38,6 +38,7 @@
#define LOG_FILTER (1U << 2)
#define LOG_CONFIG (1U << 3)
#define VERBOSE LOG_GENERAL
//#define VERBOSE (LOG_GENERAL | LOG_FRAMES | LOG_FILTER | LOG_CONFIG)
#include "logmacro.h"
@ -119,6 +120,7 @@ i82586_base_device::i82586_base_device(const machine_config &mconfig, device_typ
, m_cna(false)
, m_rnr(false)
, m_initialised(false)
, m_reset(false)
, m_irq_assert(1)
, m_cu_state(CU_IDLE)
, m_ru_state(RU_IDLE)
@ -171,6 +173,7 @@ void i82586_base_device::device_start()
save_item(NAME(m_cna));
save_item(NAME(m_rnr));
save_item(NAME(m_initialised));
save_item(NAME(m_reset));
save_item(NAME(m_cu_state));
save_item(NAME(m_ru_state));
@ -232,6 +235,17 @@ WRITE_LINE_MEMBER(i82586_base_device::ca)
}
}
WRITE_LINE_MEMBER(i82586_base_device::reset_w)
{
LOG("reset %s (%s)\n", state ? "asserted" : "cleared", machine().describe_context());
// reset is active high
if (state && !m_reset)
device_reset();
m_reset = state;
}
int i82586_base_device::recv_start_cb(u8 *buf, int length)
{
// discard external packets in loopback mode
@ -776,6 +790,12 @@ void i82586_device::device_reset()
void i82586_device::initialise()
{
if (m_reset)
{
LOG("initialise blocked by reset\n");
return;
}
// read iscp address from scp
u32 iscp_address = m_space->read_dword(m_scp_address + 8);
LOG("initialise iscp address 0x%08x\n", iscp_address);

2
src/devices/machine/i82586.h
View File

@ -158,6 +158,7 @@ public:
auto out_irq_cb() { return m_out_irq.bind(); }
DECLARE_WRITE_LINE_MEMBER(ca);
DECLARE_WRITE_LINE_MEMBER(reset_w);
protected:
i82586_base_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock, endianness_t endian, u8 datawidth, u8 addrwidth);
@ -219,6 +220,7 @@ protected:
bool m_cna; // command unit became inactive
bool m_rnr; // receive unit became not ready
bool m_initialised;
bool m_reset;
int m_irq_assert; // configurable interrupt polarity
// receive/command unit state