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shangha3.cpp: document debug mode (nw)

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Angelo Salese 2019-07-04 23:04:51 +02:00 committed by GitHub
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src/mame/drivers/shangha3.cpp
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@ -30,6 +30,14 @@ Notes:
- a Blocken PCB shot shows a 48 MHz xtal, game is definitely too slow at
8 MHz (noticeable thru colour cycling effects)
- Confirmed OSC is 48MHz and OKI resonator is 1.056MHz.
- Hebereke no Popoon has various debug mode switches, the ones found so far:
$30878e: bit 0 enable, active low.
If enabled correctly all of the non gameplay screens become
text stubs;
$aff14: a non-zero value enables CPU usage in 2p mode.
As a side-effect this also makes winning condition to never
satisfy, it goes on indefinitely with the selected characters and
input methods.
***************************************************************************/