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Flaming 7: Documented some wire hacks and the DS2401 sillicon

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serial number device. [Roberto Fresca]
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RobertoFresca 2016-05-12 23:57:31 -03:00
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commit 369a98019c
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src/mame/drivers/goldstar.cpp
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@ -14031,6 +14031,21 @@ ROM_END
Will name the sets using the internal code of both custom Will name the sets using the internal code of both custom
graphics sets in their respective order... graphics sets in their respective order...
-------------------------------------------------------------------
Tech Notes:
PCB has some hacks...
1) PPI 8255 pin 10 (PC7) is wired to pin 22 (PB4)...
Maybe the boot protection?
2) Pin 39 from solder side (speaker GND) and pin 04 from components side (PPI 8255 pin 11, PC6)
are wired with a DS2401 (sillicon serial number) device, to pins 1 & 2 (GND & DATA).
3) Z80 /INT line (pin 16) is out of socket and wired to a 74161.
*/ */
/* /*