[Coco] RGB/HDB-DOS drive swapping

[mmarlett at isd.net]

Steve,

I haven't had a chance to try the program. It is in the queue. I will
distribute via Email and we need to have a sit down meeting some night
since we live so close and I can go over the offset and how it relates to
HDB-DOS and NitrOS-9. :)

Is GREAT to see new work coming out from users again! Something that has
been missing for sometime. Utilities, apps, games, etc... GO COCO!

:)

Mark


>Boisy had asked me about a year ago to write this utility.  I finally 
>had a chance to make a beta version of it over the summer.
>
>A BASIC program to automatically copy all 256 virtual drives from the 
>master hard drive to the slave takes about 7 hours.  My ML version takes 
>2.5 hours.  This was not nearly as fast as I had hoped, but after a bit 
>of experimenting I found that the slowdown occurs in the DSKCON 
>routine.  For example, NOP'ing both calls to DSKCON in my ML program 
>allowed the program to finish in about 30 seconds, so there is almost no 
>overhead in the routine.  I could possibly rewrite DSKCON to speed 
>things up, but it's not worth the time.
>
>Like I said, it's only a beta version right now.  It will only backup 
>256 drives from a SCSI master HD to a SCSI slave HD, with a zero 
>offset.  Eventually it will be a bit more flexible, and maybe the small 
>BASIC loader program could be updated to allow some more flexibility.  
>It seemed to work very well for my use.  Mark has a copy on diskette, 
>and if anyone would like to make a test, maybe he could e-mail copies 
>out.  I could always send out the utility on a floppy disk, but since 
>I'm not an OS-9 user right now, I'm not sure what changes need to be 
>made to allow backups on an OS-9 system.  Maybe just the offset?
>
>-- Steve --
>
>
>
>Mark Marlette wrote:
>
>> At 9/19/2004 01:33 PM -0700, you wrote:
>>
>> Steve Ostrom has made a HDB-DOS copy utility. He says that he has used 
>> it to backup 7 or 9 volumes of his 256 virtual disk using this program.
>>
>> Steve????
>>
>> Mark
>>
>>
>>> >
>>> > All you need to realize is that drive numbers 0-3 don't use the
RGBDOS
>>> > HDBDOS special commands so only one type of special drive needs to be
>>> > assigned at a time. That means any operation that can be performed 
>>> with
>>> > a floppy and special medium can be duplicated with RAM and the
medium.
>>>
>>> Okay. In reading the manual... :-O  I see that DRIVE # command allows 
>>> changing
>>> drives. It looks like I could even simulate a ramdisk with variables 
>>> and use
>>> DSKI$/DSKO$ to copy any HD. Nifty.
>>>
>>> Thanks for the clue,
>>> Bob
>>>
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>>
>>
>>
>>
>
>
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