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Diffstat (limited to 'src/mame/drivers/mephisto_brikett.cpp')
-rw-r--r--src/mame/drivers/mephisto_brikett.cpp5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/mame/drivers/mephisto_brikett.cpp b/src/mame/drivers/mephisto_brikett.cpp
index bb688c7b334..76b196f8cc1 100644
--- a/src/mame/drivers/mephisto_brikett.cpp
+++ b/src/mame/drivers/mephisto_brikett.cpp
@@ -251,6 +251,7 @@ READ8_MEMBER(brikett_state::input_r)
WRITE8_MEMBER(brikett_state::esb_w)
{
+ // CDP1852 SR + DO0-DO7 goes to external port, to chessboard
if (!m_inputs[5].read_safe(0))
{
// chessboard disabled
@@ -258,14 +259,14 @@ WRITE8_MEMBER(brikett_state::esb_w)
return;
}
- // CDP1852 SR clocks CD4017, goes to external port together with DO0-DO7
+ // SR clocks CD4017
// 4017 Q0: N/C
// 4017 Q1 + d0-d7: 74374 to led data
// 4017 Q2 + d0-d7: 74373 to row select
// 4017 Q2-Q9: column select
m_esb_select = (m_esb_select + 1) % 10;
- // d0-d7 ANDed together: 4017 reset
+ // DO0-DO7 ANDed together: 4017 reset
if (data == 0xff)
m_esb_select = 0;