Contains a substantial alteration of the data structure used to hold [arbitrarily multi-rate] modified diskettes, leading to much more predictable behaviour for certain combinations of clock rate — in particular the Disk II when written to from either the Apple II or the Oric.
Also:
- tweaks the CPC's visible area again, better to match the CTM monitor;
- corrects an AY reading bug whereby values loaded onto the data bus remained visible for all time, even when the bus was ostensibly running in the other direction;
- implements open collector logic for reading from an AY IO register that is ostensibly in output mode; and
- takes yet another crack at trying to rationalise Apple II .NIB handling with emulating a real disk drive.