That was before they figures out they could reliably format 9 (vs. 8) sectors per track on those 5.25 inch drives.

I also had the MGA and CGA graphic adapters with the monochrome monitor. Had to use an RF modulator and color TV with the CGA adapter. You may recall the monochrome monitor had to get its power from the PC. If the monitor was otherwise powered and was ON while the PC was OFF, it would self-destruct!

Viscalc was one the applications I bought at the time.

Full agreement on MS Assembler documentation. POS!

It wasn't until DOS 2.0 that you could have a "sub-directory". Zowie!