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-rw-r--r--src/mess/machine/megasvp.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/src/mess/machine/megasvp.c b/src/mess/machine/megasvp.c
index 015ffe094b2..c577e7ad55a 100644
--- a/src/mess/machine/megasvp.c
+++ b/src/mess/machine/megasvp.c
@@ -56,7 +56,10 @@ static UINT32 pm_io(address_space &space, int reg, int write, UINT32 d)
mdsvp_state *state = space.machine().driver_data<mdsvp_state>();
if (state->m_emu_status & SSP_PMC_SET)
{
- state->m_pmac_read[write ? reg + 6 : reg] = state->m_pmc.d;
+ if (write)
+ state->m_pmac_write[reg] = state->m_pmc.d;
+ else
+ state->m_pmac_read[reg] = state->m_pmc.d;
state->m_emu_status &= ~SSP_PMC_SET;
return 0;
}
@@ -126,7 +129,10 @@ static UINT32 pm_io(address_space &space, int reg, int write, UINT32 d)
}
// PMC value corresponds to last PMR accessed (not sure).
- state->m_pmc.d = state->m_pmac_read[write ? reg + 6 : reg];
+ if (write)
+ state->m_pmc.d = state->m_pmac_write[reg];
+ else
+ state->m_pmc.d = state->m_pmac_read[reg];
return d;
}