[sebhc] OS (was: Boot ROM) modifications

Dwight K. Elvey dwight.elvey at amd.com
Wed Aug 10 12:23:23 CDT 2005

 My Standalone Forth has the ability to read and
write the boot sector. I do this as a standard
part of my meta compilation when I modify the
core code.
 I think the Forth and the screens disk are on
the ftp but if not, I can make some images and
send them in. I don't think I sent in the meta
compiler disk.
 To make it boot the disk should be relatively
easy but to make it auto detect 96tpi from 48tpi
would be a little more tricky.
 I don't have my machine handy right now but could
get something to you by Monday.
 For those that are intersted in the Forth, it
is basically a FIG Forth with a couple of words
taken from the 83-standard.
 The reason I didn't send the meta disks is that
I do it the lazy way. I first create a new image
in high memory. I then have another disk to
create the final image in low memory that I save
to disk as the latest version. If I wasn't so
lazy, I'd write the little bit of additional code
to handle the offsets.
>From: "Steven Parker" <sp11 at hotmail.com>

>>I managed to get a ... [96TPI]
>>drive to read a hard sector boot floppy and display the "(BOOT)" prompt on
>>my H-8/H-19. It won't go any further in the boot process ...
>Sounds like that floppy has an old OS version that doesn't understand 96TPI 
>drives.  A newer OS or one with a third-party disk driver and boot add-on is 
>needed.  I think there might be some HUG products in the archive that 
>address this.
>The big trick may be getting the new s/w onto a floppy so you can boot it.  
>You might need someone with a working 96TPI OS to make you one.   The stuff 
>I've gotten working here so far is all 48TPI.
>Incidentally, if I recall correctly, 96TPI systems would read 48TPI disks 
>but not write them.
>- Steven
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