Difference between revisions of "84PCE:Ports:5000"

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(Created page with "5000 Range Unknowns 5000 Range Unknowns 5000 Range Unknowns {|- |<u>Port...")
 
Line 17: Line 17:
 
|Bit 2 is set while any key is being pressed
 
|Bit 2 is set while any key is being pressed
 
|-
 
|-
|[[:84PCE:Ports:5002|5002]]
+
|5002
 
|00
 
|00
 
|??
 
|??
|Ports 5002-5003 may or may not serve a purpose?
+
|''Ports 5002-5003 may always read zero''
|-
+
|5003
+
|00
+
|
+
|Port 5003 may always read zero
+
 
|-
 
|-
 
|[[:84PCE:Ports:5004|5004]]
 
|[[:84PCE:Ports:5004|5004]]
Line 45: Line 40:
 
|00
 
|00
 
|
 
|
|Ports 5007-500B may always read zero
+
|''Ports 5007-500B may always read zero''
 +
|-
 +
|[[:84PCE:Ports:500C|500C]]
 +
|19
 +
|FF
 +
|Reset bit 4 to freeze
 +
|-
 +
|[[:84PCE:Ports:500D|500D]]
 +
|00
 +
|FF
 +
|Latches value written
 +
|-
 +
|[[:84PCE:Ports:500E|500E]]
 +
|00
 +
|3F
 +
|Latches value written
 +
|-
 +
|500F
 +
|00
 +
|
 +
|''Port 500F may always read zero''
 
|-
 
|-
 
|}
 
|}

Revision as of 20:17, 27 March 2015


Port    Default    Bits    Information   
5000 00 ?? May or may not serve a purpose?
5001 80 ?? Bit 2 is set while any key is being pressed
5002 00 ?? Ports 5002-5003 may always read zero
5004 11 FF Reset bit 4 to freeze
5005 30 FF Setting bit 2 or bit 7 (or both) will freeze the calculator
5006 00 3F Latches value written
5007 00 Ports 5007-500B may always read zero
500C 19 FF Reset bit 4 to freeze
500D 00 FF Latches value written
500E 00 3F Latches value written
500F 00 Port 500F may always read zero