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Subject: Returned mail: Unable to deliver mail
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From: INFO-MINIX@UDEL.EDU
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To: "MartinRedmond"<MARTIN@manvax.bitnet
Message-Id: <0095E5DD.C5BE3D80.581@manvax.cc.mancol.edu>
Subject: XT MFM HD controller info?
     
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Date: Thu, 30 Jul 1992 07:52:06 GMT
From: smackinla@CC.CURTIN.EDU.AU
Subject: XT MFM HD controller info?
To: 'Martin Redmond' <MARTIN@manvax.bitnet>
Reply-to: INFO-MINIX@UDEL.EDU
Comments: Warning -- original Sender: tag was info-minix-request@UDEL.EDU
Comments: To: info-minix@udel.edu
     
Can someone please help me with details of an XT MFM hard disk controller?
I have the port addresses and (I think) the commands and error codes, but
I'm after a little more programming info. I've also got one reference, the
Minix XT driver code, but it's not very well documented.
     
So, anyone know anything about these beasts?
     
BTW: I know the hardware is obselete, but I gain 120 meg for "free" if I
can write a driver for it for Linux, and what's more, the card coexists
quite happily with my IDE and SCSI drives!
     
Pat -- Have a day!
--
Mail System (MMDF)
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Mail System (MMDF)
Newsgroups: comp.os.minix
From: Mail Delivery Subsystem <MAILER-DAEMON@earth.cc.mancol.edu>
Subject: Returned mail: Unable to deliver mail
Originator: mmdf@nigel.ee.udel.edu
Organization: University of Delaware
Date: Fri, 31 Jul 1992 01:57:19 GMT

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From: INFO-MINIX@UDEL.EDU
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To: "MartinRedmond"<MARTIN@manvax.bitnet
Message-Id: <0095E5DD.C5BE3D80.581@manvax.cc.mancol.edu>
Subject: XT MFM HD controller info?

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From: smackinla@CC.CURTIN.EDU.AU
Subject: XT MFM HD controller info?
To: 'Martin Redmond' <MARTIN@manvax.bitnet>
Reply-to: INFO-MINIX@UDEL.EDU
Comments: Warning -- original Sender: tag was info-minix-request@UDEL.EDU
Comments: To: info-minix@udel.edu

Can someone please help me with details of an XT MFM hard disk controller?
I have the port addresses and (I think) the commands and error codes, but
I'm after a little more programming info. I've also got one reference, the
Minix XT driver code, but it's not very well documented.
     
So, anyone know anything about these beasts?
     
BTW: I know the hardware is obselete, but I gain 120 meg for "free" if I
can write a driver for it for Linux, and what's more, the card coexists
quite happily with my IDE and SCSI drives!
     
Pat -- Have a day!
-- 
Mail System (MMDF)
Newsgroups: comp.os.minix
From: adrie@ica.philips.nl (Adrie Koolen)
Subject: Re: Microkernel discussion
Organization: Philips Consumer Electronics, Eindhoven, The Netherlands
Date: Fri, 24 Jul 1992 06:55:24 GMT

In article <1992Jul22.225432.28861@bnr.ca> gryphon@bnrrch43.bnr.rich writes:
>A generic process ( scheduler for instance) has an array of pointers to code.
>It also has a mechanism for loading a pointer into this array dynamically.
>(Yes, I am not telling you how we did this, just what we do) Our switches
>can be running call processing and drivers can be changed on the fly.
>
>I realize that we would have to create the mechanism, but gating the process
>to application defined code would solve some of this.  Yes, it means the 
>kernel/driver set could modify itself.  That is the point of GATING.

The mechanism Frans proposes resembles your gating mechanism. When a driver
wants to register itself in Minix (or is just loaded by MM/FS), a message
is sent to the SYSTEM task (which therefore cannot easily be replaced
dynamically) which registers the address of the driver. If more registration
info is needed, it could also be passed via this message.

When a message is sent to this new driver, the `message deliverer', located
in the lowest part of the kernel, uses the stored address to deliver the
message. It's still not clear how we address a driver. Frans proposes to
use an ASCII string as a name of the driver and let a process ask the
kernel for a `handle' (i.e. a process slot number in Minix's case) which
can be used to address the driver. Of course, also the MM and FS are
addressed this way.

I guess that in your gating system, there's also a dispatch procedure to
call a dynamically linked-in procedure. Minix, of course, uses messages.

I think that the mechanisms don't differ too much, but Minix's message
system and interrupt mechanism make it somewhat more complex.

Adrie Koolen (adrie@ica.philips.nl)
Philips Consumer Electronics, Eindhoven, the Netherlands
Newsgroups: comp.os.minix
From: Mail Delivery Subsystem <MAILER-DAEMON@earth.cc.mancol.edu>
Subject: Returned mail: Unable to deliver mail
Originator: mmdf@nigel.ee.udel.edu
Organization: University of Delaware
Date: Fri, 31 Jul 1992 04:28:29 GMT

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From: INFO-MINIX@UDEL.EDU
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To: "MartinRedmond"<MARTIN@manvax.bitnet
Message-Id: <0095E5DD.C5BE3D80.581@manvax.cc.mancol.edu>
Subject: XT MFM HD controller info?

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From: smackinla@CC.CURTIN.EDU.AU
Subject: XT MFM HD controller info?
To: 'Martin Redmond' <MARTIN@manvax.bitnet>
Reply-to: INFO-MINIX@UDEL.EDU
Comments: Warning -- original Sender: tag was info-minix-request@UDEL.EDU
Comments: To: info-minix@udel.edu

Can someone please help me with details of an XT MFM hard disk controller?
I have the port addresses and (I think) the commands and error codes, but
I'm after a little more programming info. I've also got one reference, the
Minix XT driver code, but it's not very well documented.
     
So, anyone know anything about these beasts?
     
BTW: I know the hardware is obselete, but I gain 120 meg for "free" if I
can write a driver for it for Linux, and what's more, the card coexists
quite happily with my IDE and SCSI drives!
     
Pat -- Have a day!
-- 
Mail System (MMDF)
From: Mail Delivery Subsystem <MAILER-DAEMON@earth.cc.mancol.edu>
Subject: Returned mail: Unable to deliver mail
Originator: mmdf@nigel.ee.udel.edu
Organization: University of Delaware
Date: Fri, 31 Jul 1992 04:58:55 GMT

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From: INFO-MINIX@UDEL.EDU
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To: "MartinRedmond"<MARTIN@manvax.bitnet
Message-Id: <0095E5DD.CF5D0240.582@manvax.cc.mancol.edu>
Subject: Re: OS compare (Unix/clone)

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Date: Thu, 30 Jul 1992 22:30:35 GMT
From: Bill Pechter <pechter@OCPT.CCUR.COM>
Subject: Re: OS compare (Unix/clone)
To: 'Martin Redmond' <MARTIN@manvax.bitnet>
Reply-to: INFO-MINIX@UDEL.EDU
Comments: Warning -- original Sender: tag was info-minix-request@UDEL.EDU
Comments: To: info-minix@udel.edu

In article <1992Jul29.172406.29587@klaava.Helsinki.FI>
 torvalds@klaava.Helsinki.FI (Linus Benedict Torvalds) writes:
>
>Having several different code/date-segments doesn't lend itself very
>well to high-level languages (it doesn't even work too well in assembly,
>but there the programmer often knows what he/she is doing).  Thus
>coherent 3.2 and minix don't even try: they keep to one segment, and
>limit all data to 64kB.  You can do a lot in 64kB, but I'd rather miss
>the experience.
>
     
I hate to say it - but back in the old PDP11 days they had overlays.
And learned to like them.
     
And we walked 50 miles to school, uphill, and we didn't have shoes then...
8-)
     
There is some satisfaction in shoehorning the most functionality in to
the smallest space.  The amazing fact that a PDP11 could multitask
with the same 64k of memory that ran CP/M was amazing to me.
     
I grew up with PDP11's and love the fact that RT11 can run foreground
and background tasks (up to 15 background tasks) in a machine with only
64kb of real memory is a fact that some people that haven't had to live
with those restrictions don't understand.
     
Unfortunately, you can't run X in that space, or NFS... Perhaps TCP/IP
though...
     
Bill
     
--
--------------------------------------------------------------------------------
        Bill Pechter, N2RDI           | The postman always pings twice.
        Concurrent Computer Corp.     | pechter@ocpt.ccur.com
        2 Crescent Place, Oceanport, NJ 07757 - Tel:908-870-4780
-- 
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Newsgroups: comp.os.minix
From: Mail Delivery Subsystem <MAILER-DAEMON@earth.cc.mancol.edu>
Subject: Returned mail: Unable to deliver mail
Originator: mmdf@nigel.ee.udel.edu
Organization: University of Delaware
Date: Fri, 31 Jul 1992 09:10:17 GMT

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To: "MartinRedmond"<MARTIN@manvax.bitnet
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From: Mail Delivery Subsystem <MAILER-DAEMON@EARTH.CC.MANCOL.EDU>
Subject: Returned mail: Unable to deliver mail
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From: INFO-MINIX@UDEL.EDU
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To: "MartinRedmond"<MARTIN@manvax.bitnet
Message-Id: <0095E5DD.C5BE3D80.581@manvax.cc.mancol.edu>
Subject: XT MFM HD controller info?
     
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Date: Thu, 30 Jul 1992 07:52:06 GMT
From: smackinla@CC.CURTIN.EDU.AU
Subject: XT MFM HD controller info?
To: 'Martin Redmond' <MARTIN@manvax.bitnet>
Reply-to: INFO-MINIX@UDEL.EDU
Comments: Warning -- original Sender: tag was info-minix-request@UDEL.EDU
Comments: To: info-minix@udel.edu
     
Can someone please help me with details of an XT MFM hard disk controller?
I have the port addresses and (I think) the commands and error codes, but
I'm after a little more programming info. I've also got one reference, the
Minix XT driver code, but it's not very well documented.
     
So, anyone know anything about these beasts?
     
BTW: I know the hardware is obselete, but I gain 120 meg for "free" if I
can write a driver for it for Linux, and what's more, the card coexists
quite happily with my IDE and SCSI drives!
     
Pat -- Have a day!
--
Mail System (MMDF)
-- 
Mail System (MMDF)
Newsgroups: comp.os.minix
From: Mail Delivery Subsystem <MAILER-DAEMON@earth.cc.mancol.edu>
Subject: Returned mail: Unable to deliver mail
Originator: mmdf@nigel.ee.udel.edu
Organization: University of Delaware
Date: Fri, 31 Jul 1992 09:45:09 GMT

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554 <MARTIN@EARTH>... Unbalanced '<'
554 <MARTIN@EARTH>... Unbalanced '<'

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From: Mail Delivery Subsystem <MAILER-DAEMON@EARTH.CC.MANCOL.EDU>
Subject: Returned mail: Unable to deliver mail
To: 'Martin Redmond' <MARTIN@manvax.bitnet>
Reply-to: INFO-MINIX@UDEL.EDU
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   ----- Transcript of session follows -----
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From: INFO-MINIX@UDEL.EDU
X-Mx-Warning:   Warning -- Invalid "To" header.
To: "MartinRedmond"<MARTIN@manvax.bitnet
Message-Id: <0095E5DD.C5BE3D80.581@manvax.cc.mancol.edu>
Subject: XT MFM HD controller info?
     
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Date: Thu, 30 Jul 1992 07:52:06 GMT
From: smackinla@CC.CURTIN.EDU.AU
Subject: XT MFM HD controller info?
To: 'Martin Redmond' <MARTIN@manvax.bitnet>
Reply-to: INFO-MINIX@UDEL.EDU
Comments: Warning -- original Sender: tag was info-minix-request@UDEL.EDU
Comments: To: info-minix@udel.edu
     
Can someone please help me with details of an XT MFM hard disk controller?
I have the port addresses and (I think) the commands and error codes, but
I'm after a little more programming info. I've also got one reference, the
Minix XT driver code, but it's not very well documented.
     
So, anyone know anything about these beasts?
     
BTW: I know the hardware is obselete, but I gain 120 meg for "free" if I
can write a driver for it for Linux, and what's more, the card coexists
quite happily with my IDE and SCSI drives!
     
Pat -- Have a day!
--
Mail System (MMDF)
-- 
Mail System (MMDF)
Newsgroups: comp.os.minix
From: Mail Delivery Subsystem <MAILER-DAEMON@earth.cc.mancol.edu>
Subject: Returned mail: Unable to deliver mail
Originator: mmdf@nigel.ee.udel.edu
Organization: University of Delaware
Date: Fri, 31 Jul 1992 07:03:57 GMT

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554 <MARTIN@EARTH>... Unbalanced '<'
554 <MARTIN@EARTH>... Unbalanced '<'

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Subject: Returned mail: Unable to deliver mail
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Reply-to: INFO-MINIX@UDEL.EDU
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From: INFO-MINIX@UDEL.EDU
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To: "MartinRedmond"<MARTIN@manvax.bitnet
Message-Id: <0095E5DD.C5BE3D80.581@manvax.cc.mancol.edu>
Subject: XT MFM HD controller info?
     
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Date: Thu, 30 Jul 1992 07:52:06 GMT
From: smackinla@CC.CURTIN.EDU.AU
Subject: XT MFM HD controller info?
To: 'Martin Redmond' <MARTIN@manvax.bitnet>
Reply-to: INFO-MINIX@UDEL.EDU
Comments: Warning -- original Sender: tag was info-minix-request@UDEL.EDU
Comments: To: info-minix@udel.edu
     
Can someone please help me with details of an XT MFM hard disk controller?
I have the port addresses and (I think) the commands and error codes, but
I'm after a little more programming info. I've also got one reference, the
Minix XT driver code, but it's not very well documented.
     
So, anyone know anything about these beasts?
     
BTW: I know the hardware is obselete, but I gain 120 meg for "free" if I
can write a driver for it for Linux, and what's more, the card coexists
quite happily with my IDE and SCSI drives!
     
Pat -- Have a day!
--
Mail System (MMDF)
-- 
Mail System (MMDF)
Newsgroups: comp.os.minix
From: Mail Delivery Subsystem <MAILER-DAEMON@earth.cc.mancol.edu>
Subject: Returned mail: Unable to deliver mail
Originator: mmdf@nigel.ee.udel.edu
Organization: University of Delaware
Date: Fri, 31 Jul 1992 07:40:57 GMT

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From: INFO-MINIX@UDEL.EDU
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To: "MartinRedmond"<MARTIN@manvax.bitnet
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Subject: Re: OS compare (Unix/clone)

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Date: Thu, 30 Jul 1992 22:30:35 GMT
From: Bill Pechter <pechter@OCPT.CCUR.COM>
Subject: Re: OS compare (Unix/clone)
To: 'Martin Redmond' <MARTIN@manvax.bitnet>
Reply-to: INFO-MINIX@UDEL.EDU
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Comments: To: info-minix@udel.edu

In article <1992Jul29.172406.29587@klaava.Helsinki.FI>
 torvalds@klaava.Helsinki.FI (Linus Benedict Torvalds) writes:
>
>Having several different code/date-segments doesn't lend itself very
>well to high-level languages (it doesn't even work too well in assembly,
>but there the programmer often knows what he/she is doing).  Thus
>coherent 3.2 and minix don't even try: they keep to one segment, and
>limit all data to 64kB.  You can do a lot in 64kB, but I'd rather miss
>the experience.
>
     
I hate to say it - but back in the old PDP11 days they had overlays.
And learned to like them.
     
And we walked 50 miles to school, uphill, and we didn't have shoes then...
8-)
     
There is some satisfaction in shoehorning the most functionality in to
the smallest space.  The amazing fact that a PDP11 could multitask
with the same 64k of memory that ran CP/M was amazing to me.
     
I grew up with PDP11's and love the fact that RT11 can run foreground
and background tasks (up to 15 background tasks) in a machine with only
64kb of real memory is a fact that some people that haven't had to live
with those restrictions don't understand.
     
Unfortunately, you can't run X in that space, or NFS... Perhaps TCP/IP
though...
     
Bill
     
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        Bill Pechter, N2RDI           | The postman always pings twice.
        Concurrent Computer Corp.     | pechter@ocpt.ccur.com
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