diff options
| -rw-r--r-- | genesis.c | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -21,6 +21,7 @@ uint32_t MCLKS_PER_68K; #define MCLKS_PER_YM 7 #define MCLKS_PER_Z80 15 #define MCLKS_PER_PSG (MCLKS_PER_Z80*16) +#define Z80_INT_PULSE_MCLKS 2573 //measured value is ~171.5 Z80 clocks #define DEFAULT_SYNC_INTERVAL MCLKS_LINE #define DEFAULT_LOWPASS_CUTOFF 3390 @@ -108,8 +109,7 @@ static void z80_next_int_pulse(z80_context * z_context) { genesis_context * gen = z_context->system; z_context->int_pulse_start = vdp_next_vint_z80(gen->vdp); - //Notes in the Genesis Plus GX code suggest this is asserted for one line - z_context->int_pulse_end = z_context->int_pulse_start + MCLKS_LINE; + z_context->int_pulse_end = z_context->int_pulse_start + Z80_INT_PULSE_MCLKS; } static void sync_z80(z80_context * z_context, uint32_t mclks) |