Re: Just a couple of things.

[Howard Chu <howard@harry.lloyd.com>]

At one time I had the complete SCSI docs online, but not at the moment. There
is a BBS you can dial that has it all, if you read comp.periphs.scsi it's in
their FAQ list.

The TT and Falcon both use NCR 5380 SCSi controller chips, as far as I know.

  Firstly, I downloaded and installed MiNT-net 0.3 last night. I am impressed!
  
  I'm now working on integrating rc.net into the standard rc files for the
  next release of MiNTOS, whenever that may be! :-)
  
  Also, now I have addroottimeout() in my kernel I'll have a go at modifying
  my uptime/load average code to use this.
  
  Secondly, I've been thinking about the practicality of writing a ACSI/SCSI
  loadable device driver. Could someone tell me if device drivers can be
  called from within other device drivers in a layered manner?
  
  The way I thought of implementing the ACSI/SCSI device was as follows:-
  
  	+-------------++-------------++--------------++---------------+
          | Disk Driver || Tape Driver || CDROM driver || SCSI Ethernet |
  	+-------------++-------------++--------------++---------------+
          +-------------------------------------------------------------+
          |              Standard SCSI device API layer                 |
          +-------------------------------------------------------------+
          +-----------------++--------------------++--------------------+
          |   ACSI Driver   ||   TT SCSI Driver   ||   Falcon Driver    |
          +-----------------++--------------------++--------------------+
  
  Filesystems would layer above this model. As the Falcon SCSI and TT SCSI are
  mutually exclusive they could use the same virtual device numbers. Devices
  would be numbered in the same way as Atari does, ie. ACSI are 0-7 and SCSI
  are 8-15.
  
  To do this I'll need to get information on the following:-
  
  (a) SCSI commands
  (b) TT SCSI chip programming
  (c) Falcon SCSI hardware addresses and programming
  
  I have all the Atari developers docs except the chip specs volume for the ST
  and TT but not the Falcon as I got the docs before this was released.
  
  Can anyone point me in the right direction?
  
  Steve
  
  -- 
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