diff options
Diffstat (limited to 'src/mame/machine/namco53.c')
-rw-r--r-- | src/mame/machine/namco53.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/mame/machine/namco53.c b/src/mame/machine/namco53.c index bb71a86ad33..f4dcd8b201d 100644 --- a/src/mame/machine/namco53.c +++ b/src/mame/machine/namco53.c @@ -2,9 +2,9 @@ Namco 53XX - This instance of the Fujitsu MB8843 MCU is programmed to act as an I/O + This instance of the Fujitsu MB8843 MCU is programmed to act as an I/O device. It is used by just two games: Dig Dug and Pole Position. - + MOD0-MOD2 = input mode CS0-CS3 = chip select lines used to select 1 of 4 input sources OUT0-OUT7 = 8-bit final output data @@ -39,7 +39,7 @@ MOD selects one of 8 modes in which the input data is interpreted. - Pole Position is hard-wired to use mode 0, which reads 4 steering + Pole Position is hard-wired to use mode 0, which reads 4 steering inputs and 4 DIP switches (only 1 of each is used). The steering inputs are clocked on P0 and direction on P1, 1 bit per analog input. The DIP switches are connected to P2 and P3. @@ -47,8 +47,8 @@ Dig Dug can control which mode to use via the MOD bit latches. It sets these values to mode 7 when running. - Unknowns: - SO is connected to IOSEL on Pole Position + Unknowns: + SO is connected to IOSEL on Pole Position ***************************************************************************/ |