== Offical Specs ==
* [[Media:S158ap12.pdf|SOFT 158 Appendix 12 (XII) (The Hardware)]] - general info on Port F8FFh (page 3)* [[Media:S968ap13.pdf|SOFT 968 Appendix 13 (XIII) (Hints Tips and Workarounds)]] - includes info on Port F8FFhand interrupts (page 7)