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author AJR <ajrhacker@users.noreply.github.com>2017-10-25 12:12:28 -0400
committer AJR <ajrhacker@users.noreply.github.com>2017-10-25 12:12:28 -0400
commite5a8a47af70fd942c4216005f62af8980b64e211 (patch)
tree09fdbdbbb033c9c2dd78004cda7d346d265084c0
parent5b45e09d6ba55c0044fbe6b22e23ae9a789e6a6c (diff)
piggypas.cpp: More documentation (nw)
-rw-r--r--src/mame/drivers/piggypas.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mame/drivers/piggypas.cpp b/src/mame/drivers/piggypas.cpp
index 90751e9d37c..121150f25a7 100644
--- a/src/mame/drivers/piggypas.cpp
+++ b/src/mame/drivers/piggypas.cpp
@@ -58,6 +58,7 @@ WRITE8_MEMBER(piggypas_state::ctrl_w)
WRITE8_MEMBER(piggypas_state::mcs51_tx_callback)
{
+ // Serial output driver is UCN5833A
output().set_digit_value(m_digit_idx++, BITSWAP8(data,7,6,4,3,2,1,0,5) & 0x7f);
}
@@ -126,7 +127,7 @@ HD44780_PIXEL_UPDATE(piggypas_state::piggypas_pixel_update)
static MACHINE_CONFIG_START( piggypas )
/* basic machine hardware */
- MCFG_CPU_ADD("maincpu", I80C31, XTAL_8_448MHz) // OKI M80C31
+ MCFG_CPU_ADD("maincpu", I80C31, XTAL_8_448MHz) // OKI M80C31F or M80C154S
MCFG_CPU_PROGRAM_MAP(piggypas_map)
MCFG_CPU_IO_MAP(piggypas_io)
MCFG_MCS51_SERIAL_TX_CB(WRITE8(piggypas_state, mcs51_tx_callback))