Difference between revisions of "84PCE:Ports:B000 Unknowns"

From WikiTI
Jump to: navigation, search
(Created page with "B000 Range Unknowns B000 Range Unknowns B000 Range Unknowns {|- |<u>Port...")
 
Line 62: Line 62:
 
|''Ports B01C-B01F always read 0''
 
|''Ports B01C-B01F always read 0''
 
|-
 
|-
 
+
|[[:84PCE:Ports:B020|B020]]
 
+
|FF
 
+
|FF
 +
|Some kind of PWM scaler? BL goes to full-bright if less than [[:84PCE:Ports:B024|B024]]. If less than FF, BL gets dimmer.
 +
|-
 +
|[[:84PCE:Ports:B021|B021]]
 +
|00
 +
|FF
 +
|BL goes to full-bright if not zero
 +
|-
 +
|[[:84PCE:Ports:B022|B022]]
 +
|00
 +
|0F
 +
|BL goes to full-bright if not zero, returns to normal after about 1 second when reset to zero
 +
|-
 +
|B023
 +
|00
 +
|??
 +
|Always zero
 +
|-
 +
|[[:84PCE:Ports:B025|B025]]
 +
|00
 +
|FF
 +
|BL goes to full-bright if not zero
 +
|-
 +
|[[:84PCE:Ports:B026|B026]]
 +
|00
 +
|0F
 +
|BL goes to full-bright if not zero
 
|-
 
|-
 
|}
 
|}

Revision as of 19:03, 27 March 2015


Port    Default    Bits    Information   
B000 64 ?? Value seems fixed
B001 64 ?? Value seems fixed
B002 61 ?? Value seems fixed
B003 4C ?? Value seems fixed
B004 00 FF Ports B004-B007 latch value written
B008 Ports B008-B00B always read 0
B00C 00 77 Writing FF latches to 63, though you can manually write 67.
B00D 00 FF Ports B00D-B00F latch value written
B010 Ports B010-B013 always read 0
B014 00 FF Ports B014-B01B latch value written
B01C Ports B01C-B01F always read 0
B020 FF FF Some kind of PWM scaler? BL goes to full-bright if less than B024. If less than FF, BL gets dimmer.
B021 00 FF BL goes to full-bright if not zero
B022 00 0F BL goes to full-bright if not zero, returns to normal after about 1 second when reset to zero
B023 00 ?? Always zero
B025 00 FF BL goes to full-bright if not zero
B026 00 0F BL goes to full-bright if not zero