Pentagon 1024 paging

Number	PortNumber::$EFF7
Decimal	NumberDec::61431
Short desc.	ShortDesc::Paging in Pentagon 1024K mode
Bit Mask	PortMask::1110111111110111
Readable	Readable::no
Writable	Writable::yes
Subsystem	Subsystem::

bit 3 = 1 to overlay the bottom 16K with ram from 16k bank 0 bit 2 = 0 to enable Pentagon 1024 mapping and disable bit 5 port 0x7ffd locking, 1 to select standard zx128 mapping **

• ** Applies only when pentagon 1024 mapping mode is enabled via nextreg 0x8f.