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Old 23rd Oct 2019, 8:16 pm   #3
NealCrook
Triode
 
Join Date: May 2019
Location: Reading, Berkshire, UK.
Posts: 30
Default Re: Creating new NASCOM PolyDos magnetic media

That is true for PolyDos2 - it supports 35-track double-sided disks that can be either single density or double density.

However, PolyDos 3 only supports single-sided 80-track double-density drives, so the situation does not arise.

So, I think you'll be OK (breaths sigh of relief.. for a moment I thought you had found a fatal flaw in my scheme)

If your hardware is actually 80-track double-sided double-density then you can bootstrap with single-sided and then consider whether you want to create PolyDos 3A... Adding support for double-sided drives means mods to the format program (which I already disassembled) and mods to the ROM (for which source code is available). A fun project..
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