arcnet-hardware.txt

《嵌入式系统设计与实例开发实验教材二源码》Linux内核移植与编译实验

Two diagnostic LEDs are visible on the rear bracket of the board.
The green LED monitors the network activity: the red one shows the
board activity:

 Green  | Status               Red      | Status
 -------|-------------------   ---------|-------------------
  on    | normal activity      flash/on | data transfer
  blink | reconfiguration      off      | no data transfer;
  off   | defective board or            | incorrect memory or
        | node ID is zero               | I/O address


*****************************************************************************

** Standard Microsystems Corp (SMC) **
PC500/PC550 Longboard (16-bit cards)
-------------------------------------
  - from Juergen Seifert <[e-mail]>


STANDARD MICROSYSTEMS CORPORATION (SMC) ARCNET-PC500/PC550 Long Board
=====================================================================

Note: There is another Version of the PC500 called Short Version, which 
      is different in hard- and software! The most important differences
      are:
      - The long board has no Shared memory.
      - On the long board the selection of the interrupt is done by binary
        coded switch, on the short board directly by jumper.
        
[Avery's note: pay special attention to that: the long board HAS NO SHARED
MEMORY.  This means the current Linux-ARCnet driver can't use these cards. 
I have obtained a PC500Longboard and will be doing some experiments on it in
the future, but don't hold your breath.  Thanks again to Juergen Seifert for
his advice about this!]

This description has been written by Juergen Seifert <[e-mail]>
using information from the following Original SMC Manual 

             "Configuration Guide for
             SMC ARCNET-PC500/PC550
         Series Network Controller Boards
             Pub. # 900.033 Rev. A
                November, 1989"

ARCNET is a registered trademark of the Datapoint Corporation
SMC is a registered trademark of the Standard Microsystems Corporation  

The PC500 is equipped with a standard BNC female connector for connection
to RG-62/U coax cable.
The board is designed both for point-to-point connection in star networks
and for connection to bus networks.

The PC550 is equipped with two modular RJ11-type jacks for connection
to twisted pair wiring.
It can be used in a star or a daisy-chained (BUS) network.

       1 
       0 9 8 7 6 5 4 3 2 1     6 5 4 3 2 1
    ____________________________________________________________________
   < |         SW1         | |     SW2     |                            |
   > |_____________________| |_____________|                            |
   <   IRQ    |I/O Addr                                                 |
   >                                                                 ___|
   <                                                            CR4 |___|
   >                                                            CR3 |___|
   <                                                                 ___|
   >                                                              N |   | 8
   <                                                              o |   | 7
   >                                                              d | S | 6
   <                                                              e | W | 5
   >                                                              A | 3 | 4
   <                                                              d |   | 3
   >                                                              d |   | 2
   <                                                              r |___| 1
   >                                                        |o|    _____|
   <                                                        |o|   | J1  |
   >  3 1                                                   JP6   |_____|
   < |o|o| JP2                                                    | J2  |
   > |o|o|                                                        |_____|
   <  4 2__                                               ______________|
   >    |  |                                             |
   <____|  |_____________________________________________|

Legend:

SW1	1-6:	I/O Base Address Select
	7-10:	Interrupt Select
SW2	1-6:	Reserved for Future Use
SW3	1-8:	Node ID Select
JP2	1-4:	Extended Timeout Select
JP6		Selected - Star Topology	(PC500 only)
		Deselected - Bus Topology	(PC500 only)
CR3	Green	Monitors Network Activity
CR4	Red	Monitors Board Activity
J1		BNC RG62/U Connector		(PC500 only)
J1		6-position Telephone Jack	(PC550 only)
J2		6-position Telephone Jack	(PC550 only)

Setting one of the switches to Off/Open means "1", On/Closed means "0".


Setting the Node ID
-------------------

The eight switches in group SW3 are used to set the node ID. Each node
attached to the network must have an unique node ID which must be 
different from 0.
Switch 1 serves as the least significant bit (LSB).

The node ID is the sum of the values of all switches set to "1"  
These values are:

    Switch | Value
    -------|-------
      1    |   1
      2    |   2
      3    |   4
      4    |   8
      5    |  16
      6    |  32
      7    |  64
      8    | 128

Some Examples:

    Switch         | Hex     | Decimal 
   8 7 6 5 4 3 2 1 | Node ID | Node ID
   ----------------|---------|---------
   0 0 0 0 0 0 0 0 |    not allowed
   0 0 0 0 0 0 0 1 |    1    |    1 
   0 0 0 0 0 0 1 0 |    2    |    2
   0 0 0 0 0 0 1 1 |    3    |    3
       . . .       |         |
   0 1 0 1 0 1 0 1 |   55    |   85
       . . .       |         |
   1 0 1 0 1 0 1 0 |   AA    |  170
       . . .       |         |  
   1 1 1 1 1 1 0 1 |   FD    |  253
   1 1 1 1 1 1 1 0 |   FE    |  254
   1 1 1 1 1 1 1 1 |   FF    |  255 


Setting the I/O Base Address
----------------------------

The first six switches in switch group SW1 are used to select one
of 32 possible I/O Base addresses using the following table

   Switch       | Hex I/O
   6 5  4 3 2 1 | Address
   -------------|--------
   0 1  0 0 0 0 |  200
   0 1  0 0 0 1 |  210
   0 1  0 0 1 0 |  220
   0 1  0 0 1 1 |  230
   0 1  0 1 0 0 |  240
   0 1  0 1 0 1 |  250
   0 1  0 1 1 0 |  260
   0 1  0 1 1 1 |  270
   0 1  1 0 0 0 |  280
   0 1  1 0 0 1 |  290
   0 1  1 0 1 0 |  2A0
   0 1  1 0 1 1 |  2B0
   0 1  1 1 0 0 |  2C0
   0 1  1 1 0 1 |  2D0
   0 1  1 1 1 0 |  2E0 (Manufacturer's default)
   0 1  1 1 1 1 |  2F0
   1 1  0 0 0 0 |  300
   1 1  0 0 0 1 |  310
   1 1  0 0 1 0 |  320
   1 1  0 0 1 1 |  330
   1 1  0 1 0 0 |  340
   1 1  0 1 0 1 |  350
   1 1  0 1 1 0 |  360
   1 1  0 1 1 1 |  370
   1 1  1 0 0 0 |  380
   1 1  1 0 0 1 |  390
   1 1  1 0 1 0 |  3A0
   1 1  1 0 1 1 |  3B0
   1 1  1 1 0 0 |  3C0
   1 1  1 1 0 1 |  3D0
   1 1  1 1 1 0 |  3E0
   1 1  1 1 1 1 |  3F0


Setting the Interrupt
---------------------

Switches seven through ten of switch group SW1 are used to select the 
interrupt level. The interrupt level is binary coded, so selections 
from 0 to 15 would be possible, but only the following eight values will
be supported: 3, 4, 5, 7, 9, 10, 11, 12.

   Switch   | IRQ
   10 9 8 7 | 
   ---------|-------- 
    0 0 1 1 |  3
    0 1 0 0 |  4
    0 1 0 1 |  5
    0 1 1 1 |  7
    1 0 0 1 |  9 (=2) (default)
    1 0 1 0 | 10
    1 0 1 1 | 11
    1 1 0 0 | 12


Setting the Timeouts 
--------------------

The two jumpers JP2 (1-4) are used to determine the timeout parameters. 
These two jumpers are normally left open.
Refer to the COM9026 Data Sheet for alternate configurations.


Configuring the PC500 for Star or Bus Topology
----------------------------------------------

The single jumper labeled JP6 is used to configure the PC500 board for 
star or bus topology.
When the jumper is installed, the board may be used in a star network, when 
it is removed, the board can be used in a bus topology.


Diagnostic LEDs
---------------

Two diagnostic LEDs are visible on the rear bracket of the board.
The green LED monitors the network activity: the red one shows the
board activity:

 Green  | Status               Red      | Status
 -------|-------------------   ---------|-------------------
  on    | normal activity      flash/on | data transfer
  blink | reconfiguration      off      | no data transfer;
  off   | defective board or            | incorrect memory or
        | node ID is zero               | I/O address


*****************************************************************************

** SMC **
PC710 (8-bit card)
------------------
  - from J.S. van Oosten <[e-mail]>
  
Note: this data is gathered by experimenting and looking at info of other
cards. However, I'm sure I got 99% of the settings right.

The SMC710 card resembles the PC270 card, but is much more basic (i.e. no
LEDs, RJ11 jacks, etc.) and 8 bit. Here's a little drawing:

    _______________________________________   
   | +---------+  +---------+              |____
   | |   S2    |  |   S1    |              |
   | +---------+  +---------+              |
   |                                       |
   |  +===+    __                          |
   |  | R |   |  | X-tal                 ###___
   |  | O |   |__|                      ####__'|
   |  | M |    ||                        ###
   |  +===+                                |
   |                                       |
   |   .. JP1   +----------+               |
   |   ..       | big chip |               |   
   |   ..       |  90C63   |               |
   |   ..       |          |               |
   |   ..       +----------+               |
    -------                     -----------
           |||||||||||||||||||||

The row of jumpers at JP1 actually consists of 8 jumpers, (sometimes
labelled) the same as on the PC270, from top to bottom: EXT2, EXT1, ROM,
IRQ7, IRQ5, IRQ4, IRQ3, IRQ2 (gee, wonder what they would do? :-) )

S1 and S2 perform the same function as on the PC270, only their numbers
are swapped (S1 is the nodeaddress, S2 sets IO- and RAM-address).

I know it works when connected to a PC110 type ARCnet board.

	
*****************************************************************************

** Possibly SMC **
LCS-8830(-T) (8 and 16-bit cards)
---------------------------------
  - from Mathias Katzer <[e-mail]>
  - Marek Michalkiewicz <[e-mail]> says the
    LCS-8830 is slightly different from LCS-8830-T.  These are 8 bit, BUS
    only (the JP0 jumper is hardwired), and BNC only.
	
This is a LCS-8830-T made by SMC, I think ('SMC' only appears on one PLCC,
nowhere else, not even on the few Xeroxed sheets from the manual).

SMC ARCnet Board Type LCS-8830-T

   ------------------------------------
  |                                    |
  |              JP3 88  8 JP2         |
  |       #####      | \               |
  |       #####    ET1 ET2          ###|
  |                              8  ###|
  |  U3   SW 1                  JP0 ###|  Phone Jacks
  |  --                             ###|
  | |  |                               |
  | |  |   SW2                         |
  | |  |                               |
  | |  |  #####                        |
  |  --   #####                       ####  BNC Connector 
  |                                   ####
  |   888888 JP1                       |
  |   234567                           |
   --                           -------
     |||||||||||||||||||||||||||
      --------------------------


SW1: DIP-Switches for Station Address
SW2: DIP-Switches for Memory Base and I/O Base addresses

JP0: If closed, internal termination on (default open)
JP1: IRQ Jumpers
JP2: Boot-ROM enabled if closed
JP3: Jumpers for response timeout
 
U3: Boot-ROM Socket          


ET1 ET2     Response Time     Idle Time    Reconfiguration Time

               78                86               840
 X            285               316              1680
     X        563               624              1680
 X   X       1130              1237              1680

(X means closed jumper)

(DIP-Switch downwards means "0")

The station address is binary-coded with SW1.

The I/O base address is coded with DIP-Switches 6,7 and 8 of SW2:

Switches        Base
678             Address
000		260-26f
100		290-29f
010		2e0-2ef
110		2f0-2ff
001		300-30f
101		350-35f
011		380-38f
111 		3e0-3ef


DIP Switches 1-5 of SW2 encode the RAM and ROM Address Range: