IBM Mainframe update

[Fred Cisin]

On Sat, 4 Jul 2015, Mike Ross wrote:
> Now I haven't powered it up since I got it... over ten years ago now! But
> in my basement I have a no-brand vanilla PC... which allegedly has special
> internal IBM software on it, which allows the user to low-level reformat
> standard IBM drives to have 524 byte sectors for mainframe use; it was
> given to me for this specific purpose.
> I'll drag it out and test it at some point!

In addition to the special software, what kind of disk controller does 
it have?