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07/22/02 04:45
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#26088 - RE: Port 0 - Forcing external data mode?
Port0 is directly connected to the *system*.
a '573 is connected for latching A0-7.
All 74AHC devices can read/write on D0-7 fine. Only when the ROM (which is not PROGRAM rom) is being read back does it maintain an always-high-during-read state.

List of 12 messages in thread
TopicAuthorDate
Port 0 - Forcing external data mode?            01/01/70 00:00      
RE: Port 0 - Forcing external data mode?            01/01/70 00:00      
RE: Port 0 - Forcing external data mode?            01/01/70 00:00      
RE: Port 0 - Forcing external data mode?            01/01/70 00:00      
RE: Port 0 - Forcing external data mode?            01/01/70 00:00      
RE: Port 0 - Forcing external data mode?            01/01/70 00:00      
RE: Port 0 - Forcing external data mode?            01/01/70 00:00      
RE: Port 0 - Forcing external data mode?            01/01/70 00:00      
RE: Port 0 - Forcing external data mode?            01/01/70 00:00      
RE: Port 0 - Forcing external data mode?            01/01/70 00:00      
RE: Port 0 - Forcing external data mode?            01/01/70 00:00      
RE: Port 0 - Forcing external data mode?            01/01/70 00:00      

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