d. This value represents the pause prescalar count and the count is between 0..FF. (TO BE CHECKED: down counter? what exactly does it represent)
8. This value represents the last value written to this I/O port. Winape uses 8a and not 8b. This value has bits 7,6,5 set to 1,0 and 1 respectively. 8b is in the original specificationand is written by No$CPC.
9. This value represents the lock status of RMR2. If locked, RMR2 can't be accessed otherwise it can.