diff options
Diffstat (limited to 'src/devices/cpu/hphybrid/hphybrid.cpp')
-rw-r--r-- | src/devices/cpu/hphybrid/hphybrid.cpp | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/devices/cpu/hphybrid/hphybrid.cpp b/src/devices/cpu/hphybrid/hphybrid.cpp index 71aec796760..052c7058604 100644 --- a/src/devices/cpu/hphybrid/hphybrid.cpp +++ b/src/devices/cpu/hphybrid/hphybrid.cpp @@ -673,7 +673,12 @@ UINT16 hp_hybrid_cpu_device::RM(UINT32 addr) return RIO(CURRENT_PA , addr_wo_bsc - HP_REG_R4_ADDR); case HP_REG_IV_ADDR: - return m_reg_IV; + // Correct? + if (!BIT(m_flags , HPHYBRID_IRH_SVC_BIT) && !BIT(m_flags , HPHYBRID_IRL_SVC_BIT)) { + return m_reg_IV; + } else { + return m_reg_IV | CURRENT_PA; + } case HP_REG_PA_ADDR: return CURRENT_PA; @@ -1016,7 +1021,7 @@ void hp_hybrid_cpu_device::check_for_interrupts(void) // Do a double-indirect JSM IV,I instruction WM(AEC_CASE_C , ++m_reg_R , m_reg_P); - m_reg_P = RM(AEC_CASE_I , m_reg_IV + CURRENT_PA); + m_reg_P = RM(AEC_CASE_I , RM(HP_REG_IV_ADDR)); m_reg_I = fetch(); } |