hard puzzles:
5_2
6_1
7_2
9_1
10_1

dunno what's wrong with 8_1. NOTE: there was a missing comma in 6_1, but I fixed that. hopefully the t.a remembers...line 31, the comma between 0 & 11 for puzzle 6_1 (this wasn't fixed even in the latest version of puzzles).

all other puzzles were solved pretty quickly on linux :) now to figure out that RS232 cable...

haven't figured out interfacing SRAM with checksum accelerator...pipelining reads is a little tricky, i guess. :p