TI-83 Plus Port List
All port values are given in hexadecimal.
Port 0 - link port
Port 1 - keyboard port
Port 2 - status port
Port 3 - interrupt port
Port 4 - interrupt port
SE only:
Port 5 - memory mapping
Port 6 - memory mapping
Port 7 - memory mapping
SE only:
Port 8 - link assist enable
SE only:
Port 9 - link assist status
SE only:
Port A - link assist input
SE only:
Port D - link assist send
Port 10 - LCD controller
Port 11 - LCD data
Port 14 - flash locking
SE only:
Port 20 - CPU speed
SE only:
Port 22 - flash execution boundary
SE only:
Port 23 - flash execution boundary
SE only:
Port 29 - unknown, LCD speed
SE only:
Ports 30-38 - crystal timers
See, basically I have too much free time....not really, but I just mismanage it sufficiently :)