[Info-vax] Hobbyist licences for VAX

[gah4]

On Wednesday, April 13, 2022 at 11:24:38 PM UTC-7, Bob Eager wrote:

(snip, I wrote)

> > There is an IBM standard for virtual CKD disks used by the P/370 and 
> > successor systems, and is almost the same as that used by Hercules.

> Sorry, 3340. I realised two minutes later!

> > I thought other emulators also used that one.

> Thanks, I'll take a look. I have no particular wish to invent something 
> new. My point was that a raw disk image won't work.

And, in case you were wondering, there is a difference in the IBM and Hercules
form when using the track overflow feature, which as far as I know only applies
to the 2314 and 3330.   That allows a block to start on one track and continue
onto the next track. 

Hercules also has a compressed format that IBM doesn't use.