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Started taking baby steps towards a genuine unification of the tape interrupt generating code.

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This commit is contained in:
Thomas Harte 2016-03-13 19:45:50 -04:00
parent bc554dedf7
commit f797e6b5b6
1 changed files with 13 additions and 23 deletions
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36
Machines/Electron/Electron.cpp
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@ -850,21 +850,21 @@ inline void Tape::get_next_tape_pulse()
inline void Tape::push_tape_bit(uint16_t bit)
{
_data_register = (uint16_t)((_data_register >> 1) | (bit << 10));
if(_input.minimum_bits_until_full)
{
_input.minimum_bits_until_full--;
if(_input.minimum_bits_until_full) _input.minimum_bits_until_full--;
if(_input.minimum_bits_until_full == 7) _interrupt_status &= ~Interrupt::ReceiveDataFull;
if(_output.bits_remaining_until_empty) _output.bits_remaining_until_empty--;
if(!_output.bits_remaining_until_empty) _interrupt_status |= Interrupt::TransmitDataEmpty;
if(_data_register == 0x3ff) _interrupt_status |= Interrupt::HighToneDetect;
else _interrupt_status &= ~Interrupt::HighToneDetect;
if(_input.minimum_bits_until_full == 7)
{
_interrupt_status &= ~Interrupt::ReceiveDataFull;
}
}
evaluate_interrupts();
}
inline void Tape::reset_tape_input()
{
_input.minimum_bits_until_full = 0;
//inline void Tape::reset_tape_input()
//{
// _input.minimum_bits_until_full = 0;
// _interrupt_status &= ~(Interrupt::ReceiveDataFull | Interrupt::TransmitDataEmpty | Interrupt::HighToneDetect);
//
// if(_last_posted_interrupt_status != _interrupt_status)
@ -872,7 +872,7 @@ inline void Tape::reset_tape_input()
// _last_posted_interrupt_status = _interrupt_status;
// if(_delegate) _delegate->tape_did_change_interrupt_status(this);
// }
}
//}
inline void Tape::evaluate_interrupts()
{
@ -885,11 +885,6 @@ inline void Tape::evaluate_interrupts()
}
}
if(_data_register == 0x3ff)
_interrupt_status |= Interrupt::HighToneDetect;
else
_interrupt_status &= ~Interrupt::HighToneDetect;
if(_last_posted_interrupt_status != _interrupt_status)
{
_last_posted_interrupt_status = _interrupt_status;
@ -920,7 +915,6 @@ inline void Tape::set_counter(uint8_t value)
inline void Tape::set_data_register(uint8_t value)
{
_data_register = (uint16_t)((value << 2) | 1);
printf("Loaded — %03x\n", _data_register);
_output.bits_remaining_until_empty = 9;
}
@ -987,11 +981,7 @@ inline void Tape::run_for_cycles(unsigned int number_of_cycles)
while(_output.cycles_into_pulse > 1666)
{
_output.cycles_into_pulse -= 1666;
if(_output.bits_remaining_until_empty) _output.bits_remaining_until_empty--;
if(!_output.bits_remaining_until_empty) _interrupt_status |= Interrupt::TransmitDataEmpty;
_data_register = (_data_register >> 1) | 0x200;
evaluate_interrupts();
push_tape_bit(1);
}
}
}