Mercurial > repos > blastem
changeset 402:de2c085ce174
Assert z80 interrupt longer so that they are not missed when they should not be
author | Mike Pavone <pavone@retrodev.com> |
---|---|
date | Sat, 15 Jun 2013 23:50:59 -0700 |
parents | f54af24aad1d |
children | f0a3f86595ae |
files | blastem.c |
diffstat | 1 files changed, 3 insertions(+), 1 deletions(-) [+] |
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--- a/blastem.c Sat Jun 15 23:10:48 2013 -0700 +++ b/blastem.c Sat Jun 15 23:50:59 2013 -0700 @@ -170,6 +170,8 @@ #define dputs #endif +#define Z80_VINT_DURATION 128 + void sync_z80(z80_context * z_context, uint32_t mclks) { if (z80_enabled && !reset && !busreq) { @@ -181,7 +183,7 @@ z_context->sync_cycle = mclks / MCLKS_PER_Z80; uint32_t vint_cycle = vdp_next_vint_z80(gen->vdp) / MCLKS_PER_Z80; while (z_context->current_cycle < z_context->sync_cycle) { - if (z_context->iff1 && z_context->current_cycle < vint_cycle) { + if (z_context->iff1 && z_context->current_cycle < (vint_cycle + Z80_VINT_DURATION)) { z_context->int_cycle = vint_cycle < z_context->int_enable_cycle ? z_context->int_enable_cycle : vint_cycle; } z_context->target_cycle = z_context->sync_cycle < z_context->int_cycle ? z_context->sync_cycle : z_context->int_cycle;