Currently, the Fx55 instruction will save the number of registers specified by x into the memory space pointed to by index. The index register is then post-incremented by the number of registers stored (or not, depending on which quirk mode is activated).
The XO Chip specification calls for a subset store command as follows:
Fxy2
This will save a subset of registers starting from x and ending at y in the memory space pointed to by index. Note that the index is not post-incremented. If x is larger than y - for example x=6 and y=2 - then registers are stored in reverse order into memory (e.g. 6, 5, 4, 3, 2). The order is inclusive of start and end values.
Currently, the
Fx55instruction will save the number of registers specified byxinto the memory space pointed to byindex. Theindexregister is then post-incremented by the number of registers stored (or not, depending on which quirk mode is activated).The XO Chip specification calls for a subset store command as follows:
This will save a subset of registers starting from
xand ending atyin the memory space pointed to byindex. Note that theindexis not post-incremented. Ifxis larger thany- for examplex=6 andy=2 - then registers are stored in reverse order into memory (e.g. 6, 5, 4, 3, 2). The order is inclusive of start and end values.