[sebhc] H8 Emulator update

Steven Parker sp11 at hotmail.com
Tue Jun 1 14:48:41 CDT 2004

>I need to understand how HDOS knows what size the drive is.
>If you could give me bootable images for 40-track DS, 80-Track SS
>and 80-track DS, what would help a lot.

All the size info comes from the label sector.   But bootable?  Wouldn't 
just mountable do?  I made up some blanks in various formats (by hand, I 
don't actually have a ds, 96-tpi drive) and put them in a new empty-init 
section under disk-images.   I haven't yet made my fantasy 512-track 
megafloppy.  :-)

But be aware these images aren't tested themselves.  Maybe Eric's sftool can 
help confirm their integrity when it's uploaded.

>[I'll bet this is one reason why INIT doesn't work - I don't
>  currently accept data for sector headers, and would therefore
>  not return the right volume id after an init - I'll have to
>  check into this]

No, it never gets that far .. the message "Wrong type of media ...".
indicates that initial media tests (involving index hole timing) didn't 

Before it begins actually writing the disk, it will ask you want volume 
number you want to use.

If you can get past the media test, I'd bet you can ignore header writes and 
just update the volume number whenever the label sector is written.


- Steven

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