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# 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: