From adyer@zarniwoop.chi.il.us  Ukn Jul  8 01:54:23 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA11601; Thu, 8 Jul 93 01:54:21 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA17789; Wed, 7 Jul 93 22:53:17 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA15093; Wed, 7 Jul 93 22:52:59 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA15075; Wed, 7 Jul 93 22:52:55 -0700
Received: from ddsw1.mcs.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA17781; Wed, 7 Jul 93 22:53:06 -0700
Received: by genesis.mcs.com (/\==/\ Smail3.1.28.1 #28.2)
	id <m0oDokP-000ZDNC@genesis.mcs.com>; Thu, 8 Jul 93 00:42 CDT
Received: by chinet (/\==/\ Smail3.1.28.1 #28.1{chinet})
	id <m0oDmga-000D7CC@chinet>; Wed, 7 Jul 93 22:30 CDT
Received: by zarniwoop.chi.il.us (/\==/\ Smail3.1.24.1 #24.3)
	id <m0oDnsE-00039LC@zarniwoop.chi.il.us>; Wed, 7 Jul 93 21:46 PDT
Message-Id: <m0oDnsE-00039LC@zarniwoop.chi.il.us>
Date: Wed, 7 Jul 93 21:46 PDT
From: adyer@zarniwoop.chi.il.us (Andrew Dyer)
To: riscy@pyramid.com
Subject: Ethernet stuff
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 

One thought occured to me about Ethernet this evening - we will need
to get a block of Ethernet hardware IDs.  These will have to be
different for every board, and stored in a PLD or EPROM or EEPROM.
Someone will have to make sure that there are no conflicts in the
addressing scheme.  Anybody ever gotten a block of h/w IDs for
ethernet? Got any to spare?

Depending on how bad the ISA bus interface stuff gets, it might be
worth the trouble to just "oem" an ISA card. :-()

I haven't costed the following out, and it occurs in no particular
order, but here goes: a simple on-board 16-bit ethernet would have the
following major items (8-bit might save some glue logic and a SRAM,
but it would not be a major cost savings, so why no throw it in...)

- Controller chip
- ENDEC (might be in the same pack as #1)
- DB-15 connector
- 2 8kx8 or 32kx8 SRAM for packet buffering (some controllers use
 DRAM, but most use SRAM)
- 20 MHz oscillator or crystal (maybe)
- PALs (2 or 3) for address decode & buffer arbitration
- LEDs (fuer die blinkenlights :-)
- bus buffers and latches
- pulse xformer for isolation
- serial EEPROM for h/w ethernet ID

to add BNC you add to this:
- coax xcvr chip
- DC_DC converter module
- another pulse xformer or one a whole lotta jumpers
- BNC connector


 
From andy@resi.waldorf-gmbh.de  Ukn Jul  8 03:54:34 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA13922; Thu, 8 Jul 93 03:54:33 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA02200; Thu, 8 Jul 93 00:52:29 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA25577; Thu, 8 Jul 93 00:52:08 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA25556; Thu, 8 Jul 93 00:52:05 -0700
Received: from mail.Germany.EU.net 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA02119; Thu, 8 Jul 93 00:52:15 -0700
Received: by mail.Germany.EU.net(EUnetD-2.3.0.e) via EUnet
	id eA07467; Thu, 8 Jul 1993 09:49:02 +0200
Received: from resi 
	by wegy.waldorf-gmbh.de with SMTP (5.61/GEN-1.0.7)
	via EUnet for unido
	id AA13070; Thu, 8 Jul 93 09:44:05 +0200
From: Andreas Busse <andy@resi.waldorf-gmbh.de>
Date: Thu, 8 Jul 93 09:42:46 +0200
Message-Id: <9307080742.AA14336@resi.waldorf-gmbh.de>
Received: by resi.waldorf-gmbh.de (5.61/GEN-1.0.7)
	via EUnet for wegy.waldorf-gmbh.de
	id AA14336; Thu, 8 Jul 93 09:42:46 +0200
To: riscy@pyramid.com
Subject: Re:  Ethernet stuff
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 


> One thought occured to me about Ethernet this evening - we will need
> to get a block of Ethernet hardware IDs.  These will have to be
> different for every board, and stored in a PLD or EPROM or EEPROM.
> Someone will have to make sure that there are no conflicts in the
> addressing scheme.  Anybody ever gotten a block of h/w IDs for
> ethernet? Got any to spare?

No, unfortunally we haven't some spare adresses. Neil, Pyramid
build workstations and the like, can you find out how to get
adresses ?

> Depending on how bad the ISA bus interface stuff gets, it might be
> worth the trouble to just "oem" an ISA card. :-()

Does "oem" mean some sort of reverse engineering or simply to buy them ?

> I haven't costed the following out, and it occurs in no particular
> order, but here goes: a simple on-board 16-bit ethernet would have the
> following major items (8-bit might save some glue logic and a SRAM,
> but it would not be a major cost savings, so why no throw it in...)

I like to see ethernet on board. People can leave the sockets empty
if want.

> - Controller chip
> - ENDEC (might be in the same pack as #1)
> - DB-15 connector
> - 2 8kx8 or 32kx8 SRAM for packet buffering (some controllers use
>  DRAM, but most use SRAM)
> - 20 MHz oscillator or crystal (maybe)

No, can be derived from the master clock (40 MHz)

> - PALs (2 or 3) for address decode & buffer arbitration
> - LEDs (fuer die blinkenlights :-)

YEAH !

> - bus buffers and latches
> - pulse xformer for isolation
> - serial EEPROM for h/w ethernet ID
> to add BNC you add to this:
> - coax xcvr chip
> - DC_DC converter module

Please correct me if I'm wrong: What other supplies do
we need than +5, -12 and +12 ? All these come out of
a standard PC power supply.

> - another pulse xformer or one a whole lotta jumpers
> - BNC connector


Andy



-------------------------------------------------------------------------------
Waldorf Electronics GmbH, R&D Department
c/o Andreas Busse
Neustrasse 9-12
D-5481 Waldorf
Phone:  +49 (0)2636-80294
Fax:    +49 (0)2636-80188
e-mail: andy@resi.waldorf-gmbh.de
-------------------------------------------------------------------------------

 
From drew@hazelrah.cs.Colorado.EDU  Ukn Jul  8 05:01:15 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA15402; Thu, 8 Jul 93 05:01:14 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA10814; Thu, 8 Jul 93 01:59:46 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA04308; Thu, 8 Jul 93 01:59:24 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA04295; Thu, 8 Jul 93 01:59:21 -0700
Received: from hazelrah.cs.colorado.edu 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA10810; Thu, 8 Jul 93 01:59:33 -0700
Received: from localhost by hazelrah.cs.Colorado.EDU with SMTP id AA28389
  (5.65c/IDA-1.4.4 for <riscy@pyramid.com>); Thu, 8 Jul 1993 02:59:16 -0600
Message-Id: <199307080859.AA28389@hazelrah.cs.Colorado.EDU>
To: riscy@pyramid.com
Subject: Re: Ethernet stuff 
In-Reply-To: Your message of "Thu, 08 Jul 1993 09:42:46 +0200."
             <9307080742.AA14336@resi.waldorf-gmbh.de> 
Date: Thu, 08 Jul 1993 02:59:15 -0600
From: Drew Eckhardt <drew@hazelrah.cs.Colorado.EDU>
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 


    > Depending on how bad the ISA bus interface stuff gets, it might be
    > worth the trouble to just "oem" an ISA card. :-()
    
    Does "oem" mean some sort of reverse engineering or simply to buy them ?

Original Equipment Manufacturer - ie : do what everyone else did, 
and clone National Semi 8390 eval boards... 
    
    > I haven't costed the following out, and it occurs in no particular
    > order, but here goes: a simple on-board 16-bit ethernet would have the
    > following major items (8-bit might save some glue logic and a SRAM,
    > but it would not be a major cost savings, so why no throw it in...)

Getting rid of the SRAM gets messy - the 8390 wants to be a 
busmaster (address space is 64K, although a 32 bit address with static
upper 16 bits can be generated if the two DMA channels are combined 
together), and uses it's busmastering capabilities to handle off-chip
ring buffers.  The SRAM lets the NS sample implementation be a bus
master like it wants, means we don't have to figure out how to get 
it busmastering on our 32 bit bus (the NS 8390 is only 16 bits wide),
and means we don't need to gurantee a 9us DMA latency...
    
    I like to see ethernet on board. People can leave the sockets empty
    if want.

Agreed.  However, how are you going to socket pulse transformers, the 
DC->DC convertor, etc?  IMHO, this is a good argument for propriety
slots on the low speed bus! 

	A large number of users want SCSI, Ethernet.
	
	A few users don't want SCSI, Ethernet, etc.

Leaving empty sockets on some boards will reduce the cost for these
people.  However, sockets still cost money, as does the realestate
lost to the sockets, so it's an imperfect solution.  

	A few users want more Ethernets, more serial ports, etc.

With the current implementation of ethernet on the mainboard, 
serial ports on the mainboard, etc. we have to tell people 
"want more, buy an ISA card" which will probably be more expensive
than what we can do (List price on a dumb BOCA multiport serial
card (16550) is about $250, even at half that it's outrageous).

Having the SCSI, ethernet, serial ports, etc. on daughter cards 
on the propriety bus would keep everybody happy and solve all these
problems.

Also : 

- Bigger circuits (ie, ethernet) eat space on cheaper 2-layer
	boards rather than the expensive mainboard.

- If we use the left rear of the motherboard (adjacent to the ISA
	slots) for the bus, everything is next to a hole in the 
	case and our connector mounting problems disappear.

- Since nobody with one of these cards won't be using the feature,
	we can surface mount things, eliminating the cost of 
	sockets. 
    
    > - 2 8kx8 or 32kx8 SRAM for packet buffering (some controllers use
    >  DRAM, but most use SRAM)

You don't have to refresh DRAM, and for an 8K chip the price difference
won't be that noticeable.

    > - DC_DC converter module
    
    Please correct me if I'm wrong: What other supplies do
    we need than +5, -12 and +12 ? All these come out of
    a standard PC power supply.

15V.

--------


 
From andy@resi.waldorf-gmbh.de  Ukn Jul  8 06:16:21 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA16471; Thu, 8 Jul 93 06:16:20 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA16376; Thu, 8 Jul 93 03:12:21 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA13240; Thu, 8 Jul 93 03:11:58 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA13217; Thu, 8 Jul 93 03:11:55 -0700
Received: from mail.Germany.EU.net 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA16238; Thu, 8 Jul 93 03:12:03 -0700
Received: by mail.Germany.EU.net(EUnetD-2.3.0.e) via EUnet
	id eA13500; Thu, 8 Jul 1993 12:08:50 +0200
Received: from resi 
	by wegy.waldorf-gmbh.de with SMTP (5.61/GEN-1.0.7)
	via EUnet for unido
	id AA13642; Thu, 8 Jul 93 11:49:57 +0200
From: Andreas Busse <andy@resi.waldorf-gmbh.de>
Date: Thu, 8 Jul 93 11:48:38 +0200
Message-Id: <9307080948.AA14756@resi.waldorf-gmbh.de>
Received: by resi.waldorf-gmbh.de (5.61/GEN-1.0.7)
	via EUnet for wegy.waldorf-gmbh.de
	id AA14756; Thu, 8 Jul 93 11:48:38 +0200
To: riscy@pyramid.com
Subject: Re: Ethernet stuff
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 

>    Does "oem" mean some sort of reverse engineering or simply to buy them ?

> Original Equipment Manufacturer - ie : do what everyone else did, 
> and clone National Semi 8390 eval boards... 

I see. Finally this *is* reverse engineering, but I don't mind...

>    I like to see ethernet on board. People can leave the sockets empty
>    if want.

> Agreed.  However, how are you going to socket pulse transformers, the 
> DC->DC convertor, etc?  IMHO, this is a good argument for propriety
> slots on the low speed bus! 

Ok, putting transformer in sockets is not a good idea, but I think
the most expensive parts are the controller chips. Am I right ?

> Leaving empty sockets on some boards will reduce the cost for these
> people.  However, sockets still cost money, as does the realestate
> lost to the sockets, so it's an imperfect solution.  
>
> [...]
>
> Having the SCSI, ethernet, serial ports, etc. on daughter cards 
> on the propriety bus would keep everybody happy and solve all these
> problems.

But daughterboards cost money too, probably more than sockets.
And we still need connectors then.

> Also : 
> 
> - Bigger circuits (ie, ethernet) eat space on cheaper 2-layer
> 	boards rather than the expensive mainboard.

We have to figure that out.

> - If we use the left rear of the motherboard (adjacent to the ISA
> 	slots) for the bus, everything is next to a hole in the 
>	case and our connector mounting problems disappear.

This is a good idea anyway.

> You don't have to refresh DRAM, and for an 8K chip the price difference
> won't be that noticeable.

You mean SRAM, right ?
    
>     Please correct me if I'm wrong: What other supplies do
>     we need than +5, -12 and +12 ? All these come out of
>     a standard PC power supply.

> 15V.

Ok. What current ? If it's not that much, there might be
a cheap solution. I'm gonna ask our analogue guys.

Andy

-------------------------------------------------------------------------------
Waldorf Electronics GmbH, R&D Department
c/o Andreas Busse
Neustrasse 9-12
D-5481 Waldorf
Phone:  +49 (0)2636-80294
Fax:    +49 (0)2636-80188
e-mail: andy@resi.waldorf-gmbh.de
-------------------------------------------------------------------------------

 
From drew@alta.cs.Colorado.EDU  Ukn Jul  8 06:24:51 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA16583; Thu, 8 Jul 93 06:24:50 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA17190; Thu, 8 Jul 93 03:23:34 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA14177; Thu, 8 Jul 93 03:23:16 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA14170; Thu, 8 Jul 93 03:23:13 -0700
Received: from alta.cs.colorado.edu 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA17186; Thu, 8 Jul 93 03:23:24 -0700
Received: from localhost by alta.cs.Colorado.EDU with SMTP id AA27621
  (5.65c/IDA-1.4.4 for <riscy@pyramid.com>); Thu, 8 Jul 1993 04:23:07 -0600
Message-Id: <199307081023.AA27621@alta.cs.Colorado.EDU>
To: riscy@pyramid.com
Subject: Re: Ethernet stuff 
In-Reply-To: Your message of "Thu, 08 Jul 1993 11:48:38 +0200."
             <9307080948.AA14756@resi.waldorf-gmbh.de> 
Date: Thu, 08 Jul 1993 04:23:02 +0100
From: Drew Eckhardt <drew@alta.cs.Colorado.EDU>
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 


--------

    >    Does "oem" mean some sort of reverse engineering or simply to buy them
    ?
    
    > Original Equipment Manufacturer - ie : do what everyone else did, 
    > and clone National Semi 8390 eval boards... 
    
    I see. Finally this *is* reverse engineering, but I don't mind...

Reverse engineering means taking another design and figuring 
out what goes into it, Nat. Semi GIVES the schematics, PAL
program, etc away...

    > You don't have to refresh DRAM, and for an 8K chip the price difference
    > won't be that noticeable.
    
    You mean SRAM, right ?

Yes - looks like I slipped and hit the 'D' adajent to the 'S'. 
        
    >     Please correct me if I'm wrong: What other supplies do
    >     we need than +5, -12 and +12 ? All these come out of
    >     a standard PC power supply.
    
    > 15V.
    
    Ok. What current ? If it's not that much, there might be
    a cheap solution. I'm gonna ask our analogue guys.

Whatever thinnet requires, I'll look in the Nat. Semi databook
when I get home.
    

 
From andy@resi.waldorf-gmbh.de  Ukn Jul  8 06:53:11 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA17093; Thu, 8 Jul 93 06:53:09 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA19592; Thu, 8 Jul 93 03:52:24 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA17484; Thu, 8 Jul 93 03:52:05 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA17467; Thu, 8 Jul 93 03:52:03 -0700
Received: from mail.Germany.EU.net 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA19520; Thu, 8 Jul 93 03:52:13 -0700
Received: by mail.Germany.EU.net(EUnetD-2.3.0.e) via EUnet
	id eA15228; Thu, 8 Jul 1993 12:49:01 +0200
Received: from resi 
	by wegy.waldorf-gmbh.de with SMTP (5.61/GEN-1.0.7)
	via EUnet for unido
	id AA13911; Thu, 8 Jul 93 12:26:58 +0200
From: Andreas Busse <andy@resi.waldorf-gmbh.de>
Date: Thu, 8 Jul 93 12:25:37 +0200
Message-Id: <9307081025.AA14816@resi.waldorf-gmbh.de>
Received: by resi.waldorf-gmbh.de (5.61/GEN-1.0.7)
	via EUnet for wegy.waldorf-gmbh.de
	id AA14816; Thu, 8 Jul 93 12:25:37 +0200
To: riscy@pyramid.com
Subject: Re: Ethernet stuff
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 


Back to the ethernet stuff:

>     > - DC_DC converter module
>    
>    Please correct me if I'm wrong: What other supplies do
>    we need than +5, -12 and +12 ? All these come out of
>    a standard PC power supply.
>
> 15V.

Sorry, I had a look to some Application Notes. I can't find
any which requires +15 V. They all require -9 V (for BNC) but
that should not be a problem. We can derive it from the -12 supply.

Andy



-------------------------------------------------------------------------------
Waldorf Electronics GmbH, R&D Department
c/o Andreas Busse
Neustrasse 9-12
D-5481 Waldorf
Phone:  +49 (0)2636-80294
Fax:    +49 (0)2636-80188
e-mail: andy@resi.waldorf-gmbh.de
-------------------------------------------------------------------------------

 
From drew@fiver.cs.colorado.edu  Ukn Jul  8 07:12:12 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA17462; Thu, 8 Jul 93 07:12:10 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA20869; Thu, 8 Jul 93 04:11:03 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA20109; Thu, 8 Jul 93 04:10:45 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA20102; Thu, 8 Jul 93 04:10:43 -0700
Received: from bruno.cs.colorado.edu 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA20159; Thu, 8 Jul 93 04:10:54 -0700
Received: from fiver.cs.colorado.edu by bruno.cs.colorado.edu with SMTP id AA19908
  (5.65c/IDA-1.4.4 for <riscy@pyramid.com>); Thu, 8 Jul 1993 04:58:49 -0600
Received: by fiver.cs.colorado.edu (5.65/utah-2.15-leaf)
	id AA19579; Thu, 8 Jul 93 04:58:14 -0600
Message-Id: <9307081058.AA19579@fiver.cs.colorado.edu>
To: riscy@pyramid.com
Subject: Re: Ethernet stuff 
In-Reply-To: Your message of "Thu, 08 Jul 93 12:25:37 +0200."
             <9307081025.AA14816@resi.waldorf-gmbh.de> 
Date: Thu, 08 Jul 93 04:58:12 MDT
From: Drew Eckhardt <drew@fiver.cs.colorado.edu>
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 


--------

    
    Back to the ethernet stuff:
    
    >     > - DC_DC converter module
    >    
    >    Please correct me if I'm wrong: What other supplies do
    >    we need than +5, -12 and +12 ? All these come out of
    >    a standard PC power supply.
    >
    > 15V.
    
    Sorry, I had a look to some Application Notes. I can't find
    any which requires +15 V. They all require -9 V (for BNC) but
    that should not be a problem. We can derive it from the -12 supply.

Sorry about my faulty memory.  Maybe I should always carry data books
with me :-)


 
From rm@eacpc4.tuwien.ac.at  Ukn Jul  8 09:42:52 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA22045; Thu, 8 Jul 93 09:42:50 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA02637; Thu, 8 Jul 93 06:41:55 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA05526; Thu, 8 Jul 93 06:41:36 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA05519; Thu, 8 Jul 93 06:41:34 -0700
Received: from eacpc4.tuwien.ac.at 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA02633; Thu, 8 Jul 93 06:41:45 -0700
Received: by eacpc4.tuwien.ac.at (AIX 3.2/UCB 5.64/4.03)
          id AA27825; Thu, 8 Jul 1993 15:39:51 +0200
From: rm@eacpc4.tuwien.ac.at (Ralf Messerer)
Message-Id: <9307081339.AA27825@eacpc4.tuwien.ac.at>
Subject: Re: Ethernet stuff
To: riscy@pyramid.com
Date: Thu, 8 Jul 1993 15:39:50 +0100 (MES)
X-Mailer: ELM [version 2.4 PL21]
Content-Type: text
Content-Length: 620       
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 

* DC-DC supply

We need an isolation between the interface and the tranceiver.
The NS-databook says that this is an IEEE802.3 requirement.
(Soory I don't have the IEEE802.3 paper)
But I think because of potential differences between different nodes.



* Memory interfacing

I think we can't use the bus mastering method.
The bus will be locked during a havy network load.
If we use the 8390 the DMA Control is not good, because it is very
difficult to implement locking strategies for the internal registers.
So my opinion is to take a dual portet RAM.

-Ralf                   (Ralf Messerer  rm@eacpc4.tuwien.ac.at)


 
From Steven.D.Ligett@Dartmouth.EDU  Ukn Jul  8 10:09:15 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA23306; Thu, 8 Jul 93 10:09:14 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA03684; Thu, 8 Jul 93 07:08:10 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA07057; Thu, 8 Jul 93 07:07:44 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA07050; Thu, 8 Jul 93 07:07:42 -0700
Received: from dartvax.dartmouth.edu 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA03588; Thu, 8 Jul 93 07:07:53 -0700
Received: from prancer.dartmouth.edu by dartvax.dartmouth.edu (5.65+D5/4.5HUB)
	id AA23102; Thu, 8 Jul 93 10:06:17 -0400
Message-Id: <5388930@prancer.Dartmouth.EDU>
Date: 08 Jul 93 10:06:15 EDT
From: Steven.D.Ligett@Dartmouth.EDU (Steven D. Ligett)
Subject: Re: Ethernet stuff
To: riscy@pyramid.com
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 

--- rm@eacpc4.tuwi wrote:
* DC-DC supply

We need an isolation between the interface and the tranceiver.
--- end of quoted material ---
Yes, a dc-dc converter is needed to either power an on-board transceiver
(commonly the -9 v type), or for the off-board transceiver (12 v).  But all
my knowledge is pre 10baseT.  Has anyone done a recent design using 10baseT?

 
From andy@resi.waldorf-gmbh.de  Ukn Jul  8 10:53:03 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA25828; Thu, 8 Jul 93 10:53:01 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA08051; Thu, 8 Jul 93 07:52:06 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA11668; Thu, 8 Jul 93 07:51:47 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA11661; Thu, 8 Jul 93 07:51:44 -0700
Received: from mail.Germany.EU.net 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA07987; Thu, 8 Jul 93 07:51:56 -0700
Received: by mail.Germany.EU.net(EUnetD-2.3.0.e) via EUnet
	id eH27848; Thu, 8 Jul 1993 16:48:45 +0200
Received: from resi 
	by wegy.waldorf-gmbh.de with SMTP (5.61/GEN-1.0.7)
	via EUnet for unido
	id AA15635; Thu, 8 Jul 93 16:38:27 +0200
From: Andreas Busse <andy@resi.waldorf-gmbh.de>
Date: Thu, 8 Jul 93 16:37:05 +0200
Message-Id: <9307081437.AA15326@resi.waldorf-gmbh.de>
Received: by resi.waldorf-gmbh.de (5.61/GEN-1.0.7)
	via EUnet for wegy.waldorf-gmbh.de
	id AA15326; Thu, 8 Jul 93 16:37:05 +0200
To: riscy@pyramid.com
Subject: Re: Ethernet stuff
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 

> * DC-DC supply
> 
> We need an isolation between the interface and the tranceiver.
> The NS-databook says that this is an IEEE802.3 requirement.
> (Soory I don't have the IEEE802.3 paper)
> But I think because of potential differences between different nodes.

You may have right that IEEE802.3 requires an isolation between
sender and receiver. Nevertheless, I doubt that this true for
most applications. First, a cheap DC-DC converter doesn't really
isolate. Second, we had some trouble in our office due to a
grounding problem which produced a 100 V potential difference
between two machines. If they were *really* isolated, we would
never had noticed that. Instead, our net silently went down
after a few minutes, and the AUI-BNC adapters where hot enough
to make ham&eggs on them. Fortunally, it didn't break them.

Andy
-------------------------------------------------------------------------------
Waldorf Electronics GmbH, R&D Department
c/o Andreas Busse
Neustrasse 9-12
D-5481 Waldorf
Phone:  +49 (0)2636-80294
Fax:    +49 (0)2636-80188
e-mail: andy@resi.waldorf-gmbh.de
-------------------------------------------------------------------------------

 
From tim@ubitrex.mb.ca  Ukn Jul  8 11:12:15 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA27010; Thu, 8 Jul 93 11:12:14 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA09607; Thu, 8 Jul 93 08:11:07 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA15505; Thu, 8 Jul 93 08:10:05 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA15498; Thu, 8 Jul 93 08:10:03 -0700
Received: from ubiserver.ubitrex.mb.ca 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA09595; Thu, 8 Jul 93 08:10:12 -0700
Received: from ska.ubitrex.mb.ca ([192.75.16.23]) by ubitrex.mb.ca (4.1/SMI-4.1)
	id AA06247; Thu, 8 Jul 93 10:09:01 CDT
Date: Thu, 8 Jul 93 10:09:01 CDT
From: tim@ubitrex.mb.ca (Tim Braun)
Message-Id: <9307081509.AA06247@ubitrex.mb.ca>
To: riscy@pyramid.com
Subject: Re:  Ethernet stuff
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 


> From: Andreas Busse <andy@resi.waldorf-gmbh.de>
> > One thought occured to me about Ethernet this evening - we will need
> > to get a block of Ethernet hardware IDs.  These will have to be
> > different for every board, and stored in a PLD or EPROM or EEPROM.
> > Someone will have to make sure that there are no conflicts in the
> > addressing scheme.  Anybody ever gotten a block of h/w IDs for
> > ethernet? Got any to spare?
> 
> No, unfortunally we haven't some spare adresses. Neil, Pyramid
> build workstations and the like, can you find out how to get
> adresses ?

We have a block of Ethernet addresses.  I'll ask the guy who co-ordinated
their acquisition about what it took to get them.  I don't believe it
was hard.

________________________________________________________________
Tim Braun                          |
Ubitrex Corporation                | Voice: 204-942-2992 ext 228
1900-155 Carlton St                | FAX:   204-942-3001
Winnipeg, Manitoba, Canada R3C 3H8 | Email: tim@ubitrex.mb.ca

 
From adyer@zarniwoop.chi.il.us  Ukn Jul  8 11:17:45 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA27339; Thu, 8 Jul 93 11:17:43 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA10267; Thu, 8 Jul 93 08:16:45 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA16027; Thu, 8 Jul 93 08:15:26 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA16015; Thu, 8 Jul 93 08:15:24 -0700
Received: from genesis.mcs.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA09969; Thu, 8 Jul 93 08:15:37 -0700
Received: by genesis.mcs.com (/\==/\ Smail3.1.28.1 #28.2)
	id <m0oDxbf-000ZDKC@genesis.mcs.com>; Thu, 8 Jul 93 10:09 CDT
Received: by chinet (/\==/\ Smail3.1.28.1 #28.1{chinet})
	id <m0oDwgr-000D7CC@chinet>; Thu, 8 Jul 93 09:11 CDT
Received: by zarniwoop.chi.il.us (/\==/\ Smail3.1.24.1 #24.3)
	id <m0oDy8F-00039LC@zarniwoop.chi.il.us>; Thu, 8 Jul 93 08:43 PDT
Message-Id: <m0oDy8F-00039LC@zarniwoop.chi.il.us>
Date: Thu, 8 Jul 93 08:43 PDT
From: adyer@zarniwoop.chi.il.us (Andrew Dyer)
To: riscy@pyramid.com
In-Reply-To: Andreas Busse's message of Thu, 8 Jul 93 09:42:46 +0200 <9307080742.AA14336@resi.waldorf-gmbh.de>
Subject:  Ethernet stuff
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 

The DC-DC converter module supplies -9V for the coax xcvr chip.  It 
also provides 2KV isolation per 802.3 10Base2 spec.

 
From adyer@zarniwoop.chi.il.us  Ukn Jul  8 11:17:53 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA27351; Thu, 8 Jul 93 11:17:50 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA10285; Thu, 8 Jul 93 08:16:52 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA16037; Thu, 8 Jul 93 08:15:34 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA16029; Thu, 8 Jul 93 08:15:32 -0700
Received: from genesis.mcs.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA09973; Thu, 8 Jul 93 08:15:44 -0700
Received: by genesis.mcs.com (/\==/\ Smail3.1.28.1 #28.2)
	id <m0oDxbf-000ZDMC@genesis.mcs.com>; Thu, 8 Jul 93 10:09 CDT
Received: by chinet (/\==/\ Smail3.1.28.1 #28.1{chinet})
	id <m0oDwgt-000D7DC@chinet>; Thu, 8 Jul 93 09:11 CDT
Received: by zarniwoop.chi.il.us (/\==/\ Smail3.1.24.1 #24.3)
	id <m0oDyDV-00039LC@zarniwoop.chi.il.us>; Thu, 8 Jul 93 08:49 PDT
Message-Id: <m0oDyDV-00039LC@zarniwoop.chi.il.us>
Date: Thu, 8 Jul 93 08:49 PDT
From: adyer@zarniwoop.chi.il.us (Andrew Dyer)
To: riscy@pyramid.com
Cc: riscy@pyramid.com
In-Reply-To: Andreas Busse's message of Thu, 8 Jul 93 11:48:38 +0200 <9307080948.AA14756@resi.waldorf-gmbh.de>
Subject: Ethernet stuff
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 

the 15V he is talking about is actually spec'd as 12-15V, the current 
required is 500mA.  This supply is usually fused and comes out the AUI
port to power external MAUs.

 
From caret@pyramid.com  Ukn Jul  8 22:18:27 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA27087; Thu, 8 Jul 93 22:18:23 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA19755; Thu, 8 Jul 93 19:17:25 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA12597; Thu, 8 Jul 93 19:17:03 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA12577; Thu, 8 Jul 93 19:17:01 -0700
From: caret@pyramid.com (Neil Russell)
Message-Id: <9307090217.AA12577@sword.eng.pyramid.com>
Subject: Re:  Ethernet stuff
To: riscy@pyramid.com
Date: Thu, 8 Jul 93 19:17:01 PDT
In-Reply-To: <9307080742.AA14336@resi.waldorf-gmbh.de>; from "Andreas Busse" at Jul 8, 93 9:42 am
X-Mailer: ELM [version 2.3 PL11]
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 

> No, unfortunally we haven't some spare adresses. Neil, Pyramid
> build workstations and the like, can you find out how to get
> adresses ?

I beleive that Pyramid uses someone else's Ethernet cards.  In any case,
I know Pyramid would not give out any numbers.  There would be too
much red-tape involved.

I thought that a range of numbers could be had for close to nothing.
You just have to get in touch with who ever issues them (much like
getting an internet number).

-- 
Neil Russell		(The wizard from OZ)
Pyramid Technology			Email:  caret@pyramid.com
3860 N. First Street			Voice:  (408) 428-7302
San Jose, CA 95134-1702			  FAX:  (408) 428-8845

 
From paul@suite.sw.oz.au  Ukn Jul  9 01:28:51 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA02290; Fri, 9 Jul 93 01:28:49 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA13271; Thu, 8 Jul 93 22:27:48 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA02842; Thu, 8 Jul 93 22:27:22 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA02823; Thu, 8 Jul 93 22:27:15 -0700
Received: from munnari.OZ.AU 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA12719; Thu, 8 Jul 93 22:26:48 -0700
Received: from suite.sw.oz.au (via basser.cs.su.oz.au) by munnari.oz.au with MHSnet (5.83--+1.3.1+0.50)
	id AA03988; Fri, 9 Jul 1993 15:24:53 +1000 (from paul@suite.sw.oz.au)
Received: from suite.sw.oz.au by swift.sw.oz.au with SMTP
	id AA05291; Fri, 9 Jul 93 15:08:58 AES (5.59)
	(from paul@suite.sw.oz.au for riscy%pyramid.com@munnari.oz.au)
Received: by suite.sw.oz.au
	id AA18226; Fri, 9 Jul 1993 15:08:31 +1000 (5.65c/1.34)
	(from paul@suite.sw.oz.au for riscy%pyramid.com@swift.sw.oz.au)
From: paul@suite.sw.oz.au (Paul Antoine)
Message-Id: <199307090508.AA18226@suite.sw.oz.au>
Subject: Re: Ethernet stuff
To: riscy@pyramid.com
Date: Fri, 9 Jul 1993 15:08:30 +1000 (EST)
In-Reply-To: <9307090217.AA12577@sword.eng.pyramid.com> from "Neil Russell" at Jul 8, 93 07:17:01 pm
Organization: Softway Pty Ltd
X-Face: 
	#INY+G.,0T9NM/sS{;MG$=(^kyV,<kN!j*1>0=\3F</{Npx7Pc=*ez6NC2^8H;!}qiqZn_X
	g'qeG^tfI~y[_DCE'LH""uWAS!/Ib`$)I?,{i_!|ZN~AO$V+Ngl)+7sZ-RF6~8JR+w=K|w6
	De.N"YT*#<5:ZEJUO-#OVu1}_-j4[v4f+>43Lypv1r~Y0u>wgATNe&>HKt`gW%dF|RCmT|
X-Mailer: ELM [version 2.4 PL21]
Content-Type: text
Content-Length: 929       
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 

> I thought that a range of numbers could be had for close to nothing.
> You just have to get in touch with who ever issues them (much like
> getting an internet number).

Get in contact with the IEEE in New York (city I think?), they will
allocate a block of numbers for us for a nominal fee if I remember
correctly.  They keep the registry for all such numbers ever allocated
to any manufacturer throughout the world.

Paul

------------------------------------------------------------------------------
Paul Antoine, Softway Pty Ltd			           Net: paul@sw.oz.au
PO Box 305, Strawberry Hills, NSW 2012, Australia          Tel: +61 2 698 2322
Level 2, 79 Myrtle St, Chippendale, NSW 2008, Australia    Fax: +61 2 699 9174

"Proper management technique must include checking that all staff have
 play-lunch and that there are no unfair swapsies."
------------------------------------------------------------------------------

 
From andy@resi.waldorf-gmbh.de  Ukn Jul  9 03:33:13 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA05087; Fri, 9 Jul 93 03:33:11 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA25631; Fri, 9 Jul 93 00:31:53 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA09981; Fri, 9 Jul 93 00:31:33 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA09974; Fri, 9 Jul 93 00:31:30 -0700
Received: from mail.Germany.EU.net 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA25623; Fri, 9 Jul 93 00:31:42 -0700
Received: by mail.Germany.EU.net(EUnetD-2.3.0.e) via EUnet
	id fE28126; Fri, 9 Jul 1993 09:28:29 +0200
Received: from resi 
	by wegy.waldorf-gmbh.de with SMTP (5.61/GEN-1.0.7)
	via EUnet for unido
	id AA20283; Fri, 9 Jul 93 09:12:25 +0200
From: Andreas Busse <andy@resi.waldorf-gmbh.de>
Date: Fri, 9 Jul 93 09:11:07 +0200
Message-Id: <9307090711.AA16419@resi.waldorf-gmbh.de>
Received: by resi.waldorf-gmbh.de (5.61/GEN-1.0.7)
	via EUnet for wegy.waldorf-gmbh.de
	id AA16419; Fri, 9 Jul 93 09:11:07 +0200
To: riscy@pyramid.com
Subject: Re: Ethernet stuff
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 


> > I thought that a range of numbers could be had for close to nothing.
> > You just have to get in touch with who ever issues them (much like
> > getting an internet number).
> 
> Get in contact with the IEEE in New York (city I think?), they will
> allocate a block of numbers for us for a nominal fee if I remember
> correctly.  They keep the registry for all such numbers ever allocated
> to any manufacturer throughout the world.
> 
> Paul

Ok, if people don't mind I will get in touch with the IEEE to get
some Ethernet numbers. Waldorf will need them anyway, so we will
pay for them. Ok ?
How many numbers will we need for the riscy boards ? 500 ? 1000 ? more ?

Andy

-------------------------------------------------------------------------------
Waldorf Electronics GmbH, R&D Department
c/o Andreas Busse
Neustrasse 9-12
D-5481 Waldorf
Phone:  +49 (0)2636-80294
Fax:    +49 (0)2636-80188
e-mail: andy@resi.waldorf-gmbh.de
-------------------------------------------------------------------------------

 
From Steven.D.Ligett@Dartmouth.EDU  Ukn Jul  9 08:50:29 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA12689; Fri, 9 Jul 93 08:50:27 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA24378; Fri, 9 Jul 93 05:48:26 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA01545; Fri, 9 Jul 93 05:47:01 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA01538; Fri, 9 Jul 93 05:46:57 -0700
Received: from dartvax.dartmouth.edu 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA24155; Fri, 9 Jul 93 05:47:11 -0700
Received: from prancer.dartmouth.edu by dartvax.dartmouth.edu (5.65+D5/4.5HUB)
	id AA26628; Fri, 9 Jul 93 08:45:38 -0400
Message-Id: <5401583@prancer.Dartmouth.EDU>
Date: 09 Jul 93 08:45:37 EDT
From: Steven.D.Ligett@Dartmouth.EDU (Steven D. Ligett)
Subject: Re: Ethernet stuff
To: riscy@pyramid.com
Sender: riscy-request@pyramid.com
Reply-To: riscy@pyramid.com
Status: RO
X-Status: 

--- You wrote:
How many numbers will we need for the riscy boards ? 500 ? 1000 ? more ?
--- end of quoted material ---
I think that when you get addreses, you end up with the upper 24 bits
defined, and you do anything you want with the 24 lower bits -- i.e. you get
a block of 16 million addresses.  If my local enquiries come back, I'll
forward info to Andy.  (Unless, again, I screw up a reply and I forward the
info to everyone.)

So far all I've gotten back is confirmation that the IEEE handles it, and
that Dartmouth College has a block, since we manufacture Ethernet cards for
the routers we build.

 
From owner-riscy@pyramid.com  Tue Jul 13 09:32:46 1993
Received: from gossip.pyramid.com by SunSITE.unc.edu (4.1/tas-gen/1-30-93)
	id AA06925; Tue, 13 Jul 93 09:32:46 EDT
Received: from sword.eng.pyramid.com 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA17579; Mon, 12 Jul 93 18:24:04 -0700
Received: by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA21108; Mon, 12 Jul 93 18:22:21 -0700
Received: from goss.pyramid.com
	by sword.eng.pyramid.com (5.61/Pyramid_Internal_Configuration)
	id AA21101; Mon, 12 Jul 93 18:22:19 -0700
Received: from ubiserver.ubitrex.mb.ca 
	by gossip.pyramid.com (5.61/OSx5.1a Pyramid-Internet-Gateway)
	id AA17563; Mon, 12 Jul 93 18:22:36 -0700
Received: from ska.ubitrex.mb.ca ([192.75.16.23]) by ubitrex.mb.ca (4.1/SMI-4.1)
	id AA27735; Mon, 12 Jul 93 20:21:18 CDT
Date: Mon, 12 Jul 93 20:21:18 CDT
From: tim@ubitrex.mb.ca (Tim Braun)
Message-Id: <9307130121.AA27735@ubitrex.mb.ca>
To: riscy@pyramid.com
Subject: Re: Ethernet stuff
Sender: owner-riscy@pyramid.com
Reply-To: riscy@pyramid.com

> From: adyer@zarniwoop.chi.il.us (Andrew Dyer)

> Most people skip the DC-DC converter for the AUI supply and just use
> a fuse and maybe a diode.

Which explains why someone reported big-time ground loop problems
on a multi-floor net.

We really should do it properly.  DC-DC for the AUI is my vote.  
Digi-key lists a few - from US$10.00 to US$60.00 apiece.  (In
quantities of 10 or more.)  Wow. That's an expensive vote.  Tell 
me they're not that much...

There must be a cheaper alternative with Linear Tech, Maxim, NatSemi,
Motorola, and TI pumping out switching regulator chips.
________________________________________________________________
Tim Braun                          |
Ubitrex Corporation                | Voice: 204-942-2992 ext 228
1900-155 Carlton St                | FAX:   204-942-3001
Winnipeg, Manitoba, Canada R3C 3H8 | Email: tim@ubitrex.mb.ca
 
