Pentagon 1024 paging
From SpecNext Wiki
| 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.