NextPort:$BF3B

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Port Number $BF3B
Decimal
Short desc. ULA+ Register
Bit Mask
Readable ?
Writable Yes
Subsystem


bits 7:6 Select register group 

 00 = palette group

 01 = mode group

bits 5:0 Writes data 

 if bits 7:6 = 00, selects an index 0-63 in the ula+ palette

 if bits 7:6 = 01, ignored (changing timex video mode is incompatible with existing ULA+ software)
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