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added HLT line (it's used by alpha denshi protection mcu)

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This commit is contained in:
hap 2015-06-04 23:21:16 +02:00
parent 3a9f5f622a
commit cacb9bb1b5
2 changed files with 36 additions and 2 deletions
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28
src/emu/cpu/hmcs40/hmcs40.c
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@ -215,6 +215,7 @@ void hmcs40_cpu_device::device_start()
m_prev_op = 0;
m_i = 0;
m_eint_line = 0;
m_halt = 0;
m_pc = 0;
m_prev_pc = 0;
m_page = 0;
@ -242,6 +243,8 @@ void hmcs40_cpu_device::device_start()
save_item(NAME(m_prev_op));
save_item(NAME(m_i));
save_item(NAME(m_eint_line));
save_item(NAME(m_halt));
save_item(NAME(m_timer_halted_remain));
save_item(NAME(m_pc));
save_item(NAME(m_prev_pc));
save_item(NAME(m_page));
@ -477,9 +480,25 @@ void hmcs40_cpu_device::do_interrupt()
void hmcs40_cpu_device::execute_set_input(int line, int state)
{
state = (state) ? 1 : 0;
// halt/unhalt mcu
if (line == HMCS40_INPUT_LINE_HLT && state != m_halt)
{
if (state)
{
m_timer_halted_remain = m_timer->remaining();
m_timer->reset();
}
else
m_timer->adjust(m_timer_halted_remain);
m_halt = state;
return;
}
if (line != 0 && line != 1)
return;
state = (state) ? 1 : 0;
// external interrupt request on rising edge
if (state && !m_int[line])
@ -551,6 +570,13 @@ inline void hmcs40_cpu_device::increment_pc()
void hmcs40_cpu_device::execute_run()
{
// in HLT state, the internal clock is not running
if (m_halt)
{
m_icount = 0;
return;
}
while (m_icount > 0)
{
// LPU is handled 1 cycle later

10
src/emu/cpu/hmcs40/hmcs40.h
View File

@ -26,7 +26,6 @@
#define MCFG_HMCS40_WRITE_D_CB(_devcb) \
hmcs40_cpu_device::set_write_d_callback(*device, DEVCB_##_devcb);
enum
{
HMCS40_PORT_R0X = 0,
@ -39,6 +38,13 @@ enum
HMCS40_PORT_R7X
};
enum
{
HMCS40_INPUT_LINE_INT0 = 0,
HMCS40_INPUT_LINE_INT1,
HMCS40_INPUT_LINE_HLT
};
// pinout reference
@ -181,6 +187,8 @@ protected:
UINT8 m_i; // 4-bit immediate opcode param
int m_eint_line; // which input_line caused an interrupt
emu_timer *m_timer;
int m_halt; // internal HLT state
attotime m_timer_halted_remain;
int m_icount;
UINT16 m_pc; // Program Counter