[Coco] Hacking the SuperIDE

[Retro Canada]

ops broken email:

i tried:

dmode /i0 stp=ff typ=81 dns=08 wpc=05 ofs=2ddc

and even though I cannot access it. It gives not permission.


On Wed, Oct 3, 2012 at 12:49 PM, Retro Canada <retrocanada76 at gmail.com> wrote:
> on my side I could not make the /ih descriptor to work.
>
> There is something broken here. First it mounts itself as I0 and the
> offset is zero, as well as stp and
>
> On Wed, Oct 3, 2012 at 12:20 PM, Gene Heskett <gheskett at wdtv.com> wrote:
>> On Wednesday 03 October 2012 11:55:51 Retro Canada did opine:
>>
>>> For HDB-DOS, the offset is 3 byte long. So I believe it can be
>>> $FFFFFF-(256*630) maximum.
>>
>> That is an HDBDOS restriction.  If running nitros9, and your bootfile
>> includes /sh.dd, then be aware that the dmode utility can be used to make
>> quite a few of the 256 disk sets of rsdos formatted virtual disks
>> available.
>>
>> For instance, I have 2 1Gb drives on my tc^3 scsi controller.  Address 0 on
>> the scsi bus is my work drive, and is partitioned for $1DBB90 sectors as
>> /dd.  That is about 498 megs, using a cluster size of 4.
>>
>> Normally, a dmode of the /sh descriptor says the offset is also set to
>> $1DBB90.  This is the "wpc=1D ofs=BB90" in dmode.  In the /sh descriptor
>> for the superdriver, the stp value is used as the vdisk to access, so if
>> stp=$80, that is the drive my copy of HDBDOS can boot from.
>>
>> BUT, until I run out of drive, there is no reason the offsets in /sh cannot
>> be modified (write it on the wall so you can restore) by using dmode to
>> increase this offset value by an additional $27600 for every additional 256
>> vdisk set you need.  On one of those 4Gb CF cards, that is a huge bunch.
>>
>> I think what I would do would be to write me a bunch of scripts called
>> dmodesh# where # was the set of vdisks you wanted to look at.
>>
>> Cheers, Gene
>> --
>> "There are four boxes to be used in defense of liberty:
>>  soap, ballot, jury, and ammo. Please use in that order."
>> -Ed Howdershelt (Author)
>> My web page: <http://coyoteden.dyndns-free.com:85/gene> is up!
>> TAILFINS!! ... click ...
>>
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>
>
>
> --
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-- 
Panasonic FSA1-WSX
Commodore 64
Commodore 64C
Commodore 128
Apple //c
TRS-Color Computer 3
TI-99/4A
..and more coming!