Diff for /wikisrc/ports/mvmeppc.mdwn between versions 1.1 and 1.2

version 1.1, 2012/12/19 03:50:46 version 1.2, 2014/01/17 14:17:26
Line 17  recent boards will be added as and when  Line 17  recent boards will be added as and when 
 developers.  developers.
 """  """
 supported_hardware="""  supported_hardware="""
 ###Supported System Models  ##Supported System Models
 * MVME160x family   * MVME160x family 
 ###Boot Options  ##Boot Options
 'Supported:'  **Supported:**
 * network  * network
 'Unsupported:'  **Unsupported:**
 * disk  * disk
Line 35  supported_hardware=""" Line 35  supported_hardware="""
 """  """
 additional="""  additional="""
 ###What are the jumpers on the backplane  * [NetBSD/mvmeppc FAQ](http://www.NetBSD.org/ports/mvmeppc/faq.html)
   * [NetBSD/mvmeppc History](http://www.NetBSD.org/ports/mvmeppc/history.html)
 The jumpers on the backplane are for Bus Grant and Interrupt Acknowledge. Some  
 VMEbus boards, like disk controllers, do their own VMEbus I/O instead of using  
 DMA from the CPU. The I/O board requests control of the VMEbus, the arbiter on  
 the CPU board releases control of the VMEbus, and then the arbiter on the CPU  
 sends a Bus Grant signal down the backplane.  
 There are only 4 Bus Grant levels, and you can have several boards, on the same  
 Bus Grant level. The Bus Grant signal daisy-chains down the backplane through  
 each I/O board. If you have an empty slot you break the daisy-chain.  
 Backplane manufacturers put jumper pins next to the connectors so you can jumper  
 across empty slots. Unfortunately the jumpers may be to the right or left of a  
 slot depending on the manufacturer.  
 You may also find that some VMEbus boards don't pass on daisy-chain signals that  
 they don't use. This means that you may have to leave jumpers on even when a  
 board is in a slot.  
 If the boards are side-by-side without an empty slot between the CPU and the  
 VMEbus boards you may not need any jumpers. That might be worth a try.   
 Using NetBSD/prep as a base, NetBSD was ported to an MVME1603-051 by Steve  
 Woodford. The board was one of two donated to the NetBSD Foundation by Gan  
 Starling on the condition that a port be attempted.  
 Following receipt of the boards, and replacement of the VxWorks bootcode by a  
 PPCBUG image kindly provided by Motorola Computer Group, NetBSD/mvmeppc was up  
 and running multi-user within two weeks.   
 """  """
 ]]  ]]
 [[!tag tier2port]]  [[!tag tier2port]]

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  Added in v.1.2

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