DC600HC IOTAMAT Format Blank QIC Cartridge Analysis (HCD format)

Click here to download the .logicdata file that I display in my video above.

I see in the following doc, that there are a number of different "preformatted" QIC cartridges of this era:

3M
Compatibility and Competitive
Cross Reference Information
Data Cartridge Tape Products 

ALPHAMAT™

DELTAMAT™

GAMMAMAT™

KAPPAMAT™

THETAMAT™

RHOMAT™

NUMAT

IOTAMAT™

ZETAMAT™

Looks to be a 3M thing, since these are all their model tapes, and this is their publication.

Reading Zilog S8000 QIC Tapes (MFM format)

I've read a few tapes purportedly from the Zilog S8000 using a DEI drive, and a quick look at the data captures in the Saleae GUI appears to show an MFM format, but with the data block anatomy unknown at this time.

So that I can orient myself to the data pulses I see in these captures, I'm reviewing the 

DEI (Data Electronics Incorporated) Series CMTD-3400S2 6400 BPI High Density Cartridge Magnetic Tape Drive Operation and Maintenance Manual

It is believed that this is the drive that these tapes were written with.

Here's what the beginning of the first block looks like: