800 and 1600bpi 9 track test data

[Al Kossow]

There are two gzip'ed files up now of analog digitized 9 track data under
http://bitsavers.org/projects/9track containing two files of 16 bit incrementing
data patterns blocked 512 bytes/blk and the tach signal from a Qualstar 1260 running
at 50 ips.

The data can be viewed using Salea's Logic app in simulation mode if anyone has burning
curiosity what a 1/2" tape block looks like.

I made these as test data today for Len Shustek's 9 track readtape project
https://github.com/LenShustek/readtape