NEC PC Programmers Reference/PC-98xx Series Programmers Reference

Ports edit
COM edit
Floppy Disk edit
Hard Disk/CD-ROM edit
Keyboard edit
Mouse edit
Music edit
Networking edit
Printer/Parallel edit
Sound edit
System edit
Video edit
BIOS Interrupts edit
COM/Serial edit
DOS edit
- 0x21 (see DOS API )