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tms9914: fixed handling of GTS aux command.

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fulivi 2018-05-09 16:03:21 +02:00 committed by Vas Crabb
parent 923933efcb
commit 743b0a9c83
2 changed files with 11 additions and 6 deletions
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16
src/devices/machine/tms9914.cpp
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@ -547,6 +547,7 @@ void tms9914_device::do_swrst()
m_rl_state = FSM_RL_LOCS; m_rl_state = FSM_RL_LOCS;
m_pp_ppas = false; m_pp_ppas = false;
m_c_state = FSM_C_CIDS; m_c_state = FSM_C_CIDS;
m_gts = false;
update_int(); update_int();
set_accrq(false); set_accrq(false);
@ -847,6 +848,7 @@ void tms9914_device::update_fsm()
prev_state = m_c_state; prev_state = m_c_state;
if (controller_reset()) { if (controller_reset()) {
m_c_state = FSM_C_CIDS; m_c_state = FSM_C_CIDS;
m_gts = false;
m_c_dly_timer->reset(); m_c_dly_timer->reset();
} else { } else {
switch (m_c_state) { switch (m_c_state) {
@ -863,8 +865,13 @@ void tms9914_device::update_fsm()
case FSM_C_CACS: case FSM_C_CACS:
if (m_rpp) { if (m_rpp) {
m_c_state = FSM_C_CPWS; m_c_state = FSM_C_CPWS;
m_gts = false;
} else if (m_gts && !sh_active()) {
m_c_state = FSM_C_CSBS;
m_gts = false;
// This ensures a BO interrupt is generated if TACS is active
m_sh_state = FSM_SH_SIDS;
} }
// gts -> CSBS
break; break;
case FSM_C_CSBS: case FSM_C_CSBS:
@ -1246,11 +1253,8 @@ void tms9914_device::do_aux_cmd(unsigned cmd , bool set_bit)
break; break;
case AUXCMD_GTS: case AUXCMD_GTS:
if (m_c_state == FSM_C_CACS && !sh_active()) { if (m_c_state == FSM_C_CACS) {
m_c_state = FSM_C_CSBS; m_gts = true;
m_ext_state_change = true;
// This ensures a BO interrupt is generated if TACS is active
m_sh_state = FSM_SH_SIDS;
update_fsm(); update_fsm();
} }
break; break;

1
src/devices/machine/tms9914.h
View File

@ -160,6 +160,7 @@ private:
bool m_hdfa; bool m_hdfa;
bool m_hdfe; bool m_hdfe;
bool m_rtl; bool m_rtl;
bool m_gts;
bool m_rpp; bool m_rpp;
bool m_sic; bool m_sic;
bool m_sre; bool m_sre;