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Merge branch 'PSNee-8.7.0' of https://github.com/kalymos/PsNee into PSNee-8.7.0

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kalymos
2026-03-14 22:45:02 +01:00
parent 4a7a429a92 1d7548b027
commit d0ab3f4322
1 changed files with 84 additions and 0 deletions
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84
PSNee/BIOS_patching.h
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@@ -150,3 +150,87 @@ void Bios_Patching(void) {
#endif
}
#endif
#ifdef BIOS_PATCH_4
volatile uint8_t patch_done = 0;
void Bios_Patching(void) {
// PHASE 1: Sync (unchanged)
if (PIN_AX_READ) {
while (PIN_AX_READ);
while (!PIN_AX_READ);
} else {
while (!PIN_AX_READ);
}
// PHASE 2: Silence Detection
uint8_t confirms = 0;
while (confirms < CONFIRM_COUNTER_TARGET) {
uint16_t silence = SILENCE_THRESHOLD;
uint8_t valid = 1;
while (silence) {
if (PIN_AX_READ) {
while (PIN_AX_READ);
valid = 0;
break;
}
silence--;
}
if (valid) confirms++;
}
PIN_LED_ON;
// PHASE 3: Pulse counting AX
uint8_t pulses = PULSE_COUNT;
uint8_t prev = (PIN_AX_READ != 0);
while (pulses) {
uint8_t curr = (PIN_AX_READ != 0);
if (!prev && curr) {
pulses--;
if (!pulses) {
__builtin_avr_delay_cycles(BIT_OFFSET_CYCLES);
PIN_DX_OUTPUT;
__builtin_avr_delay_cycles(OVERRIDE_CYCLES);
PIN_DX_INPUT;
break;
}
}
prev = curr;
}
// PHASE 4: Optional AY patch
#ifdef INTERRUPT_RISING_HIGH_PATCH
while (PIN_AY_READ);
_delay_ms(FOLLOWUP_OFFSET_MS);
pulses = PULSE_COUNT_2;
prev = (PIN_AY_READ != 0);
while (pulses) {
uint8_t curr = (PIN_AY_READ != 0);
if (!prev && curr) {
pulses--;
if (!pulses) {
__builtin_avr_delay_cycles(BIT_OFFSET_2_CYCLES);
PIN_DX_OUTPUT;
__builtin_avr_delay_cycles(OVERRIDE_2_CYCLES);
PIN_DX_INPUT;
break;
}
}
prev = curr;
}
#endif
patch_done = 1;
}
#endif