john@castle.ed.ac.uk (John Hannah) (02/12/91)
I gather that if I want to connect a hard disk to an ST(E) I need a host
adapter (DMA -> SCSI) (ICD etc) and a SCSI hard disk. If I want to use
a ST506 disk then I need a SCSI to ST506 controller (Omti etc).
What I want to know is :-
1) Where is the software for the hard disk driver ? Is it in TOS (1.6?)
or a separate driver supplied by ICD etc. If the latter - is it in PROM.
If not how does "autoboot" work ?
2) Has anyone attached an ST506 drive without going the SCSI route ? ie.
by building their own hardware (+ software?). (I guess the answer to
this question depends on question (1)!!
Replies by email would be great since I suspect that these questions must
have been asked before although I haven't noticed any in the last six months
or so.
Thanks,
John Hannah
(Electrical Engineering, University of Edinburgh)Roger.Sheppard@bbs.actrix.gen.nz (02/13/91)
Distribution:world In article <8448@castle.ed.ac.uk> john@castle.ed.ac.uk (John Hannah) writes: > I gather that if I want to connect a hard disk to an ST(E) I need a host > adapter (DMA -> SCSI) (ICD etc) and a SCSI hard disk. If I want to use > a ST506 disk then I need a SCSI to ST506 controller (Omti etc). > > What I want to know is :- > > 1) Where is the software for the hard disk driver ? Is it in TOS (1.6?) > or a separate driver supplied by ICD etc. If the latter - is it in PROM. > If not how does "autoboot" work ? TOS does have a small routine to read the boot sector and execute it if its set for execution. all bytes in the boot sector must add up to $1234 this can then load the hard disk driver, or any other driver for that matter. Note; the Hard Disk driver can be loaded from Cartridge, or Floppy The order is Cartridge, Floppy A. B ??, then Hard Disk, (Devices 0-7) > 2) Has anyone attached an ST506 drive without going the SCSI route ? ie. > by building their own hardware (+ software?). (I guess the answer to > this question depends on question (1)!! Yes the Germans have done that, (don't they allways) using a PC hard disk controller and a home made host adapter, plus patches to the TOS roms, or a program in the Cartridge port. > John Hannah > (Electrical Engineering, University of Edinburgh) -- Roger W. Sheppard 85 Donovan Rd, Kapiti New Zealand...