Thread View: net.micro.pc
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4 total messages
Started by Ken Hall
Tue, 09 Sep 1986 00:28
Disk controller address
Author: Ken Hall
Date: Tue, 09 Sep 1986 00:28
Date: Tue, 09 Sep 1986 00:28
4 lines
605 bytes
605 bytes
Does anyone know the format address for the IBM 10mb disk controller which comes in an IBM XT? Ken Hall
Re: Disk controller address
Author: Ken Hall
Date: Thu, 11 Sep 1986 00:16
Date: Thu, 11 Sep 1986 00:16
30 lines
1348 bytes
1348 bytes
The elaborate on my problem: I installed a Western Digital hard disk controller card into an IBM XT. To get everything working I had to get into debug and run a program off the ROM of the Western Digital (WD) card. It went something like this: debug -rax 0000 -0003 -g=xxxx:xxxx some address on the card. i don't remember it right now. Western Digital, copyright . . . . etc Then proceeded to write its own special stamp the the Winchester. Well, I turned around and put the IBM hard disk controller card back in the box to see how it worked and it would not, because WD had put its format on the disk. I need to know how to put IBM's special stamp back on this disk. Hopefully, the code needed to do the job is at some known address on the card. Anyone know it? Ken
Re: Disk controller address
Author: David Pointer
Date: Wed, 17 Sep 1986 00:30
Date: Wed, 17 Sep 1986 00:30
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With the WX2 card in an XT type machine, go into debug, and unassemble starting at c800:0003. You should see two jumps starting there. The first jump sends you to the disk i/o routines while the second jump will send you to the ROM based fixed disk primary format routines. *dave@hplabs
Re: Disk controller address
Author: Erik Lindberg
Date: Sat, 20 Sep 1986 00:56
Date: Sat, 20 Sep 1986 00:56
33 lines
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In article <2242@gitpyr.UUCP>, ken@gitpyr.UUCP (Ken Hall) writes:
> I installed a Western Digital hard disk controller card into an IBM XT.
>
> To get everything working I had to get into debug and run a program off the
> ROM of the Western Digital (WD) card.
...
>
> Then proceeded to write its own special stamp the the Winchester.
...
>
> I need to know how to put IBM's special stamp back on this disk. Hopefully,
> the code needed to do the job is at some known address on the card.
The WD card does not put any special stamp on the disk. What is does is
the low level formatting of the drive. IBM does not provide a similar
routine with their disk controller.
Your IBM controller should not have any trouble reading the disk formatted
by the WD controller, however! From your description of the procedure you
went through, you have only done the low level format of the drive. You
will need to also do an FDISK, followed by a FORMAT command on your newly
formatted hard drive. The dos FORMAT command doesn't really format the disk,
all it does is reads the bad sectors and locks them out, and creates a boot
block and initial directory structure on the disk. FDISK is required to tell
DOS that it is allowed access to the disk, and how much of the disk it can
use (never mind that you only USE msdos!)
--
del (Erik Lindberg) aka Hugable
Hugs: One of the few good things in life that are still free.
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