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Merge pull request #2032 from JoakimLarsson/via6522_fix

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Via6522 fixes
This commit is contained in:
Joakim Larsson Edström 2017-02-01 01:40:00 +01:00 committed by GitHub
commit c6c6fb8cc0
1 changed files with 98 additions and 39 deletions
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137
src/devices/machine/6522via.cpp
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@ -31,7 +31,15 @@
PARAMETERS PARAMETERS
***************************************************************************/ ***************************************************************************/
#define TRACE_VIA 0 #define LOG_SETUP (1U << 1)
#define LOG_SHIFT (1U << 2)
#define VERBOSE 0 // (LOG_SETUP|LOG_SHIFT)
#define LOG_OUTPUT_FUNC printf
#include "logmacro.h"
#define LOGSETUP(...) LOGMASKED(LOG_SETUP, __VA_ARGS__)
#define LOGSHIFT(...) LOGMASKED(LOG_SHIFT, __VA_ARGS__)
/*************************************************************************** /***************************************************************************
@ -310,10 +318,7 @@ void via6522_device::set_int(int data)
output_irq(); output_irq();
if (TRACE_VIA) LOG("%s:6522VIA chip %s: IFR = %02X\n", machine().describe_context(), tag(), m_ifr);
{
logerror("%s:6522VIA chip %s: IFR = %02X\n", machine().describe_context(), tag(), m_ifr);
}
} }
} }
@ -330,10 +335,7 @@ void via6522_device::clear_int(int data)
output_irq(); output_irq();
if (TRACE_VIA) LOG("%s:6522VIA chip %s: IFR = %02X\n", machine().describe_context(), tag(), m_ifr);
{
logerror("%s:6522VIA chip %s: IFR = %02X\n", machine().describe_context(), tag(), m_ifr);
}
} }
} }
@ -344,14 +346,16 @@ void via6522_device::clear_int(int data)
void via6522_device::shift_out() void via6522_device::shift_out()
{ {
LOGSHIFT("Shift Out SR: %02x->", m_sr);
m_out_cb2 = (m_sr >> 7) & 1; m_out_cb2 = (m_sr >> 7) & 1;
m_sr = (m_sr << 1) | m_out_cb2; m_sr = (m_sr << 1) | m_out_cb2;
LOGSHIFT("%02x\n", m_sr);
m_cb2_handler(m_out_cb2); m_cb2_handler(m_out_cb2);
if (!SO_T2_RATE(m_acr)) if (!SO_T2_RATE(m_acr))
{ {
m_shift_counter = (m_shift_counter + 1) % 8; m_shift_counter = (m_shift_counter - 1) & 7;
if (m_shift_counter == 0) if (m_shift_counter == 0)
{ {
@ -362,9 +366,11 @@ void via6522_device::shift_out()
void via6522_device::shift_in() void via6522_device::shift_in()
{ {
LOGSHIFT("Shift In SR: %02x->", m_sr);
m_sr = (m_sr << 1) | (m_in_cb2 & 1); m_sr = (m_sr << 1) | (m_in_cb2 & 1);
LOGSHIFT("%02x\n", m_sr);
m_shift_counter = (m_shift_counter + 1) % 8; m_shift_counter = (m_shift_counter - 1) & 7;
if (m_shift_counter == 0) if (m_shift_counter == 0)
{ {
@ -378,31 +384,34 @@ void via6522_device::device_timer(emu_timer &timer, device_timer_id id, int para
switch (id) switch (id)
{ {
case TIMER_SHIFT: case TIMER_SHIFT:
m_out_cb1 = 0; LOGSHIFT("SHIFT timer event\n");
m_out_cb1 ^= 1;
m_cb1_handler(m_out_cb1); m_cb1_handler(m_out_cb1);
if (SO_T2_RATE(m_acr) || SO_T2_CONTROL(m_acr) || SO_O2_CONTROL(m_acr)) if (m_out_cb1 & 1) // raising flank
{ {
shift_out(); if (SI_T2_CONTROL(m_acr) || SI_O2_CONTROL(m_acr))
{
shift_in();
}
} }
else // falling flank
m_out_cb1 = 1;
m_cb1_handler(m_out_cb1);
if (SI_T2_CONTROL(m_acr) || SI_O2_CONTROL(m_acr))
{ {
shift_in(); if (SO_T2_RATE(m_acr) || SO_T2_CONTROL(m_acr) || SO_O2_CONTROL(m_acr))
{
shift_out();
}
} }
if (SO_T2_RATE(m_acr) || m_shift_counter) if (SO_T2_RATE(m_acr) || m_shift_counter)
{ {
if (SI_O2_CONTROL(m_acr) || SO_O2_CONTROL(m_acr)) if (SI_O2_CONTROL(m_acr) || SO_O2_CONTROL(m_acr))
{ {
m_shift_timer->adjust(clocks_to_attotime(2)); m_shift_timer->adjust(clocks_to_attotime(1));
} }
else else
{ {
m_shift_timer->adjust(clocks_to_attotime((m_t2ll + 2)*2)); m_shift_timer->adjust(clocks_to_attotime(m_t2ll + 2));
} }
} }
break; break;
@ -615,17 +624,28 @@ READ8_MEMBER( via6522_device::read )
break; break;
case VIA_SR: case VIA_SR:
LOGSHIFT("Read SR: %02x ", m_sr);
val = m_sr; val = m_sr;
m_shift_counter=0; m_out_cb1 = 1;
m_shift_counter = 8;
clear_int(INT_SR); clear_int(INT_SR);
LOGSHIFT("ACR: %02x ", m_acr);
if (SI_O2_CONTROL(m_acr)) if (SI_O2_CONTROL(m_acr))
{ {
m_shift_timer->adjust(clocks_to_attotime(2)); m_shift_timer->adjust(clocks_to_attotime(1));
LOGSHIFT("SI_O2 starts timer ");
} }
if (SI_T2_CONTROL(m_acr)) else if (SI_T2_CONTROL(m_acr))
{ {
m_shift_timer->adjust(clocks_to_attotime((m_t2ll + 2)*2)); m_shift_timer->adjust(clocks_to_attotime(m_t2ll + 2));
LOGSHIFT("SI_T2 starts timer ");
} }
else if (! (SO_O2_CONTROL(m_acr) || SO_T2_CONTROL(m_acr) || SO_T2_RATE(m_acr)))
{
m_shift_timer->adjust(attotime::never);
LOGSHIFT("Timer stops");
}
LOGSHIFT("\n");
break; break;
case VIA_PCR: case VIA_PCR:
@ -656,6 +676,8 @@ WRITE8_MEMBER( via6522_device::write )
{ {
offset &=0x0f; offset &=0x0f;
LOGSETUP(" * %s Reg %02x <- %02x \n", tag(), offset, data);
switch (offset) switch (offset)
{ {
case VIA_PB: case VIA_PB:
@ -776,25 +798,33 @@ WRITE8_MEMBER( via6522_device::write )
case VIA_SR: case VIA_SR:
m_sr = data; m_sr = data;
m_shift_counter=0; LOGSHIFT("Write SR: %02x\n", m_sr);
m_out_cb1 = 1;
m_shift_counter = 8;
clear_int(INT_SR); clear_int(INT_SR);
LOGSHIFT("ACR: %02x ", m_acr);
if (SO_O2_CONTROL(m_acr)) if (SO_O2_CONTROL(m_acr))
{ {
m_shift_timer->adjust(clocks_to_attotime(2)); m_shift_timer->adjust(clocks_to_attotime(1));
LOGSHIFT("SO_O2 starts timer");
} }
if (SO_T2_RATE(m_acr) || SO_T2_CONTROL(m_acr)) else if (SO_T2_RATE(m_acr) || SO_T2_CONTROL(m_acr))
{ {
m_shift_timer->adjust(clocks_to_attotime((m_t2ll + 2)*2)); m_shift_timer->adjust(clocks_to_attotime(m_t2ll + 2));
LOGSHIFT("SO_T2 starts timer");
} }
else if (! (SI_O2_CONTROL(m_acr) || SI_T2_CONTROL(m_acr)))
{
m_shift_timer->adjust(attotime::never); // In case we change mode before counter expire
LOGSHIFT("Timer stops");
}
LOGSHIFT("\n");
break; break;
case VIA_PCR: case VIA_PCR:
m_pcr = data; m_pcr = data;
if (TRACE_VIA) LOG("%s:6522VIA chip %s: PCR = %02X\n", machine().describe_context(), tag(), data);
{
logerror("%s:6522VIA chip %s: PCR = %02X\n", machine().describe_context(), tag(), data);
}
if (CA2_FIX_OUTPUT(data) && m_out_ca2 != CA2_OUTPUT_LEVEL(data)) if (CA2_FIX_OUTPUT(data) && m_out_ca2 != CA2_OUTPUT_LEVEL(data))
{ {
@ -813,14 +843,32 @@ WRITE8_MEMBER( via6522_device::write )
{ {
uint16_t counter1 = get_counter1_value(); uint16_t counter1 = get_counter1_value();
m_acr = data; m_acr = data;
LOGSHIFT("Write ACR: %02x ", m_acr);
output_pb(); output_pb();
if (T1_CONTINUOUS(data)) LOGSHIFT("Shift mode [%02x]: ", (m_acr >> 2) & 7);
if (SR_DISABLED(m_acr)) LOGSHIFT("Disabled");
if (SI_T2_CONTROL(m_acr)) LOGSHIFT("IN on T2");
if (SI_O2_CONTROL(m_acr)) LOGSHIFT("IN on O2");
if (SI_EXT_CONTROL(m_acr)) LOGSHIFT("IN on EXT");
if (SO_T2_RATE(m_acr)) LOGSHIFT("OUT on continous T2");
if (SO_T2_CONTROL(m_acr)) LOGSHIFT("OUT on T2");
if (SO_O2_CONTROL(m_acr)) LOGSHIFT("OUT on O2");
if (SO_EXT_CONTROL(m_acr)) LOGSHIFT("OUT on EXT");
if (SR_DISABLED(m_acr) || SI_EXT_CONTROL(m_acr) || SO_EXT_CONTROL(m_acr))
{
m_shift_timer->adjust(attotime::never);
LOGSHIFT(" Timer stops");
}
if (T1_CONTINUOUS(m_acr))
{ {
m_t1->adjust(clocks_to_attotime(counter1 + IFR_DELAY)); m_t1->adjust(clocks_to_attotime(counter1 + IFR_DELAY));
m_t1_active = 1; m_t1_active = 1;
} }
LOGSHIFT("\n");
} }
break; break;
@ -870,8 +918,7 @@ WRITE_LINE_MEMBER( via6522_device::write_ca1 )
{ {
m_in_ca1 = state; m_in_ca1 = state;
if (TRACE_VIA) LOG("%s:6522VIA chip %s: CA1 = %02X\n", machine().describe_context(), tag(), m_in_ca1);
logerror("%s:6522VIA chip %s: CA1 = %02X\n", machine().describe_context(), tag(), m_in_ca1);
if ((m_in_ca1 && CA1_LOW_TO_HIGH(m_pcr)) || (!m_in_ca1 && CA1_HIGH_TO_LOW(m_pcr))) if ((m_in_ca1 && CA1_LOW_TO_HIGH(m_pcr)) || (!m_in_ca1 && CA1_HIGH_TO_LOW(m_pcr)))
{ {
@ -942,12 +989,12 @@ WRITE_LINE_MEMBER( via6522_device::write_cb1 )
m_latch_b = input_pb(); m_latch_b = input_pb();
} }
if (SO_EXT_CONTROL(m_acr)) if (!state && SO_EXT_CONTROL(m_acr))
{ {
shift_out(); shift_out();
} }
if (SI_EXT_CONTROL(m_acr)) if (state && SI_EXT_CONTROL(m_acr))
{ {
shift_in(); shift_in();
} }
@ -960,6 +1007,18 @@ WRITE_LINE_MEMBER( via6522_device::write_cb1 )
m_cb2_handler(1); m_cb2_handler(1);
} }
} }
else // shift is not controlled by m_pcr
{
if (!state && SO_EXT_CONTROL(m_acr))
{
shift_out();
}
if (state && SI_EXT_CONTROL(m_acr))
{
shift_in();
}
}
} }
} }