CFB “Architecture" in R4

• CFB started as a quick hack on MFB

• R4 goal was to make it usable on Sun3/60

• Biggest problems were text performance and blt code size (16 copies)

• Code tweaked and retweaked to maximize performance on 16MHz R3000 and Sun3

• No overall plan at the start of work

• cfb8line.c contains 489 cpp lines in 1463 lines

Notes: