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- Newsgroups: comp.sys.atari.st.tech
- Path: sparky!uunet!math.fu-berlin.de!freia.sax.de!hohmuth
- From: hohmuth@freia.sax.de (Michael Hohmuth)
- Subject: Re: Coexisting hard drives
- Message-ID: <TQZ0HDL@math.fu-berlin.de>
- Sender: news@math.fu-berlin.de (Math Department)
- Reply-To: hohmuth@freia.inf.tu-dresden.de
- Organization: Dept. of Computer Science, TU Dresden, Germany
- References: <ENTROPY.93Jan21074718@kropotkin.gnu.ai.mit.edu>
- Date: Thu, 21 Jan 1993 15:28:18 GMT
- Lines: 39
-
- In article <ENTROPY.93Jan21074718@kropotkin.gnu.ai.mit.edu>, entropy@gnu.ai.mit.edu (maximum entropy) writes:
-
- > The Megafile currently boots with AHDI 3.01. I'd like to run it with
- > the ICD software instead, so I plan to boot with the Toadfile, copy
- > the contents of the Megafile onto a cartridge, format the Megafile
- > with ICD software, copy everything back to the Megafile, and then
- > reconnect the Megafile as the boot device. (Am I correct that the
- > first device in the DMA daisy chain is the boot hard disk?) The
- > question is, will my AHDI-formatted Megafile be accessible while I'm
- > running the ICD boot software, or will I have to do a backup/restore
- > to floppy to get everything copied over?
- >
- > Also, will I have to diddle any switches to hook up both drives at the
- > same time, or does the DMA bus automagically figure things out from
- > the order in which they are cabled to the machine?
-
- The device which it boots off is always device number 0, no matter where
- the device is in the chain. So be sure you give your Toadfile a device address
- different from 0. (To be more correct: It boot from the first DMA device it
- can read and execute a boot sector from.)
-
- The ICD software is compatible to AHDI, so you will be able to access your
- AHDI-formatted partitions while running the ICD driver.
-
- I think it's not nessecary to boot from your Toadfile. You could install
- the ICD booter on your Megadrive and then boot from it. In this case, you
- would not have to change your Megafile's device number (which, as I heard,
- is even impossible with some older Megafiles).
-
- > [...] Will I still be
- > able to access the ICD adapter's internal clock if the ICD adapter is
- > second in the chain?
-
- Yes, you will. The ICD host adapter's clock is device number 6 and can always
- be accessed, no matter where it is in the chain.
-
- Michael
- --
- Internet: hohmuth@freia.inf.tu-dresden.de
-