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Diffstat (limited to 'src/devices/cpu/pdp1/pdp1.cpp')
-rw-r--r--src/devices/cpu/pdp1/pdp1.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/devices/cpu/pdp1/pdp1.cpp b/src/devices/cpu/pdp1/pdp1.cpp
index f0952b1c2eb..a4c55cc6377 100644
--- a/src/devices/cpu/pdp1/pdp1.cpp
+++ b/src/devices/cpu/pdp1/pdp1.cpp
@@ -785,7 +785,7 @@ void pdp1_device::execute_run()
/* read first word as instruction */
MB = 0;
/* data will be transferred to IO register in response to RPB */
- m_extern_iot[2](2, 0, 1, IO, AC);
+ m_extern_iot[2](2, 1, MB, IO, AC);
m_rim_step = 1;
m_ios = 0;
break;
@@ -831,7 +831,7 @@ void pdp1_device::execute_run()
/* read second word as data */
MB = 0;
/* data will be transferred to IO register in response to RPB */
- m_extern_iot[2](2, 0, 1, IO, AC);
+ m_extern_iot[2](2, 1, MB, IO, AC);
m_rim_step = 3;
m_ios = 0;
break;